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68 results about "Polypropyleneimine" patented technology
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Method for reducing odor using coordinated polydentate compounds
InactiveUS20050084474A1Facilitate typeFacilitate cross-linkingHeavy metal active ingredientsBiocideCompound aCompound (substance)
A method for reducing odor is provided. The method comprises forming a coordination complex between a transition metal and a polydentate compound, and contacting the coordinated complex with an odorous compound. The transition metal provides one or more active sites for capturing the odorous compound. In some embodiments, the polydentate compound may be a polyalkylimine, such as polyethyleneimine, polypropyleneimine, or a dendrimer thereof.
Owner:KIMBERLY-CLARK WORLDWIDE INC
Supported polypropylene imine material and preparation method and application thereof
InactiveCN102068967AImprove thermal stabilityGood chemical stabilityProductsOther chemical processesPolymer scienceSorbent
The invention discloses a supported polypropylene imine material and a preparation method and application thereof. The material is formed by supporting polypropylene imine in a porous carrier material, wherein the mass ratio of the polypropylene imine to the porous carrier material is 0.1-2:1. The polypropylene imine one or random mixture of first generation, second generation or third generationpolypropylene imines taking ethylene dimine, butyl diamine, hexanediamine or diethylenetriamine as a core. The polypropylene imine is supported on the porous carrier material such as porous silica gel, active alumina, silicon-based ordered mesoporous material SBA-15, MCM-41 or active carbon or the like by a physical dipping-solvent evaporation method or a chemical method; and the material can be used as an adsorbent for catching and separating acid gas such as CO2, SO2 or H2S or the like from a gas mixture. The adsorbent has the advantages of quick and efficient adsorption, high adsorption capacity, high selectivity, recycle and the like.
Owner:ZHEJIANG UNIV
Photoinduced charge-transfer materials for nonlinear optical applications
A method using polyelectrolyte self-assembly for preparing multi-layered organic molecular materials having individual layers which exhibit ultrafast electron and / or energy transfer in a controlled direction occurring over the entire structure. Using a high molecular weight, water-soluble, anionic form of poly-phenylene vinylene, self-assembled films can be formed which show high photoluminescence quantum efficiency (QE). The highest emission QE is achieved using poly(propylene-imine) (PPI) dendrimers as cationic binders. Self-quenching of the luminescence is observed as the solid polymer film thickness is increased and can be reversed by inserting additional spacer layers of transparent polyelectrolytes between each active conjugated layer, such that the QE grows with thickness. A red shift of the luminescence is also observed as additional PPV layers are added. This effect persists as self-quenching is eliminated. Charge transfer superlattices can be formed by additionally incorporating C60 acceptor layers.
Owner:LOS ALAMOS NATIONAL SECURITY
Shale hydration inhibition agent(s) and method of use
A water-based drilling fluid and method of using same are presented in this disclosure, which fluid is used in drilling wells through a formation containing a shale that swells in the presence of water. The drilling fluid comprises an aqueous based continuous phase; a weighting material; and a shale hydration inhibition agent (SHIA) selected from the group consisting of propylamine derivatives, hydrogenated poly(propyleneimine) dendrimers (HPPID), and polyamine twin dendrimers (PTD). In some embodiments, the SHIA of this disclosure is not hydrolyzed at a temperature in the range of from about 100° F. to about 500° F. The drilling fluid may further comprise a fluid loss control agent, an encapsulating agent, other additives, and combinations thereof. A method of reducing shale swelling during wellbore drilling is also described. The method comprises circulating in the subterranean well a water-based drilling fluid comprising an aqueous based continuous phase, a weighting material, and a SHIA.
Owner:SHRIEVE CHEM PRODS
Method for reducing odor using coordinated polydentate compounds
InactiveUS7754197B2Facilitate cross-linkingHeavy metal active ingredientsBiocideCompound aReactive site
Owner:KIMBERLY-CLARK WORLDWIDE INC
Fluorine-containing aliphatic chain-modified cationic polymer and application of fluorine-containing aliphatic chain-modified cationic polymer as gene carrier
ActiveCN104017828ALow priceEasy to synthesizeOther foreign material introduction processesVector-based foreign material introductionCationic polymerizationPolyamide
Owner:EAST CHINA NORMAL UNIV
Dendrimer gene carrier modified by fluorine-containing aromatic ring compound as well as preparation method and application thereof
ActiveCN103881108AHigh transfection efficiencyLow toxicityVector-based foreign material introductionPolyamideTransfection
The invention provides a dendrimer gene transfection carrier modified by a fluorine-containing aromatic ring compound as shown in a formula (I) or a formula (I'). The dendrimer gene transfection carrier comprises a dendrimer skeleton and a fluorine-containing aromatic ring compound functional group which is covalently linked to the surface of the dendrimer; and the dendrimer comprises a polyamide-amine dendrimer and a polypropyleneimine dendrimer. The invention also provides a preparation method of the gene transfection carrier and an application of a composition of the gene transfection carrier as a nucleic acid molecule transporting carrier. The preparation method is characterized in that the dendrimer is modified by a brand-new modification method and a functional group, the reaction is simple and efficient and the yield is high, an efficient transfection effect can be achieved in a cell transfection process, the material is simple to produce and low in cost, the toxicity caused by the transfection process on cells is low, and gene molecules can be transported to cells efficiently and safely; and the gene transfection carrier has the advantages of high efficiency, low toxicity, low price, simple synthesis and the like.
Owner:EAST CHINA NORMAL UNIV
Bromine-substituted aromatic compound modified polymer material, and preparation method and application thereof
ActiveCN105254900AHigh transfection efficiencyLow cytotoxicityOther foreign material introduction processesTumor/cancer cellsPolymer scienceBromine
The invention provides a bromine-substituted aromatic compound modified cationic polymer material represented by formula (1). The bromine-substituted aromatic compound modified cationic polymer material comprises a cationic polymer skeleton and a bromine-substituted aromatic compound function group covalently connected to the surface of the cationic polymer; the cationic polymer skeleton comprises polyamidoamine dendrimer, polypropyleneimine dendrimer, linear polyethyleneimine cationic polymer, a branched polyethyleneimine cationic polymer and a derivative thereof; and the polymer material is can be used as a carrier for medicines, nucleic acids and proteins. The bromine-substituted aromatic compound modified polymer has the advantages of low synthesis cost, small cytotoxicity and high transfection efficiency, and is a carrier material with good application prospect.
Owner:EAST CHINA NORMAL UNIV
MODIFIED POLY(PROPYLENE-IMINE) DENDRIMERS AND THEIR USE AS TRANSFECTION AGENTS FOR AMIONIC BIOACTIVE FACTORS ( as amended
The present invention is concerned with modified poly-(propylene imine) dendrimers, comprising cationic internal ammonium groups and external non-toxic endgroups, pharmaceutical compositions comprising said dendrimers, methods for the production of said dendrimers and their use as transfections agents for anionic bioactive therapeutic factors, for use in gene therapy, in particular for the treatment of cancer. The modified poly-(propylene imine) dendrimer of generation 1, 2, 3, 4 or 5, also comprising incomplete dendrimers and mixtures thereof, comprising external end groups and internal amine functions are characterized in that:(a) substantially all external endgroups are groups of formula (I) wherein R is a radical selected from the group of C1-10alkyl, polyethylene glycol radical and polyethylene glycol gallyl radical; and(b) substantially all internal amine functions are quaternary cationic ammonium functions. Most preferred are the quaternized compounds DAB-dendr-(NHCOCH3)4, DAB-dendr-(NHCOCH3)8, DAB-dendr-(NHCOCH3)16, DAB-dendr-(NHCOCH3)32, DAB-dendr-(NHCOCH3)64, DAB-dendr-(NHCOPh((EO)4OMe)3)4, DAB-dendr-(NHCOPh((EO)4OMe)3)8, DAB-dendr-(NHCOPh((EO)4OMe)3)16, DAB-dendr-(NHCOPh((EO)4OMe)3)32 and DAB-dendr-(NHCOPh((EO)4OMe)3)64.
Owner:JANSSEN PHARMA NV
Gene transfer vector and preparation method as well as application thereof
ActiveCN103289101AIncreased toxicityLow toxicityOther foreign material introduction processesPolyamideCytotoxicity
The invention provides a gene transfer vector shown in a formula (1) in the specification. The vector comprises a dendrimer skeleton and a diamino triazine functional group, wherein the diamino triazine group is covalently connected on the surface of the dendrimer skeleton; a dendrimer comprises a polyamidoamine dendrimer and a poly(propyleneimine) dendrimer; and a primary amine group is arranged on the surface of the dendrimer. The invention also provides a preparation method of the gene transfer vector and application of the gene transfer vector as a nucleic acid molecule conveying vector in vitro or in vivo. The invention also provides a compound comprising the gene transfer vector. The gene transfer vector is low in synthetic cost, has low cytotoxicity, can effectively and safely convey gene molecules to cells and has the advantages of efficiency, low toxicity, low cost and the like.
Owner:EAST CHINA NORMAL UNIV
Method of preparing integral generation polypropyleneimine dendrimer by reducing cyano group
InactiveCN102786421AMild reaction conditionsOrganic compound preparationAmino compound preparationSodium borohydratePolypropyleneimine
The invention discloses a method of preparing a primary amine compound by reducing a cyano group. The method is characterized in that the primary amine compound is integral generation PPI (Polypropyleneimine) dendrimer. The method comprises a step of reducing half generation PPI dendrimer in alkaline solution with sodium borohydride under normal pressure by taking Raney Ni as a catalyst under an alkaline condition, wherein the reaction is performed in the solution; the mass ratio of the Raney Ni to the half generation PPI is 1:1-7.5:1; and the molar ratio of the sodium borohydride to the cyano group in the half generation PPI is 1.5:1-4:1. The preparation method can be performed under normal pressure; and a product has the advantages of high yield and high primary amine content.
Owner:SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
Fluoride modification based dendrimer gene transfer vector as well as preparation method and application thereof
InactiveCN103290046AHigh yieldGood biocompatibilityVector-based foreign material introductionCytotoxicityNitrogen
The invention provides a fluoride modification based dendrimer gene transfer vector. The vector comprises a dendrimer skeleton and a fluorochemical functional group, wherein the fluorochemical functional group is covalently connected on the surface of a dendrimer; the dendrimer comprises a polyamidoamine dendrimer and a poly(propyleneimine) dendrimer. The invention also provides a preparation method of the gene transfer vector and application of the gene transfer vector as a nucleic acid molecule conveying vector. The invention also provides a compound comprising the gene transfer vector. The gene transfer vector is simple and efficient, has high yield, can reduce low nitrogen / phosphorus ratio and achieve an efficient transfer effect in the cell transfer process, is low in cost, has low cytotoxicity, can effectively and safely convey gene molecules to cells and has the advantages of efficiency, low toxicity, low price, simpleness in synthesis and the like.
Owner:EAST CHINA NORMAL UNIV
Phenylboronic acid-containing modified polymer material and application thereof in intracellular delivery of proteins and polypeptides
ActiveCN111763317AGood biocompatibilityMaintain biological activityDiagnosticsMicrobiological testing/measurementPolyamidePolypropylene
The invention provides an application of a phenylboronic acid-containing modified high polymer material in intracellular delivery of proteins and polypeptides, the phenylboronic acid-containing modified high polymer material is composed of a cationic polymer and a phenylboronic acid-containing functional group, and the phenylboronic acid-containing functional group is covalently connected to the cationic polymer; the cationic polymer comprises a polyamide-amine dendrimer, polypropyleneimine, polylysine and the like; the phenylboronic acid-containing modified high polymer material can be used as an intracellular delivery carrier for proteins and polypeptides, i.e., protein and polypeptide molecules are delivered from extracellular to intracellular carriers. The method for using the phenylboronic acid-modified polymer material as a protein and polypeptide intracellular delivery carrier can achieve high efficiency, is effective to proteins with different molecular weights and isoelectricpoints, can maintain the biological activity of the proteins, has low toxicity to cells, and has good biocompatibility.
Owner:EAST CHINA NORMAL UNIVERSITY
Reagent and method for measuring thrombin-antithrombin complex
ActiveUS20180238871A1Small amountAccurate measurementDisease diagnosisBiological testingDextranAmmonium chloride mixture
Owner:MITSUBISHI CHEM MEDIENCE
Anti-flaming silk, preparation method and application thereof
ActiveCN109371670AMore reactive sitesImprove high temperature stabilityHeat resistant fibresAnimal fibresCross-linkTannin
Owner:NANTONG TEXTILE & SILK IND TECH RES INST +1
High-strength transparent polypropylene and preparation method thereof
The invention discloses high-strength transparent polypropylene and a preparation method thereof. The polypropylene is prepared from the following raw materials in parts by mass: 100 parts of polypropylene, 1 to 6 parts of polypropyleneimine-modified nanometer silicon dioxide, 0.01 to 0.1 part of polypropylene grafted maleic anhydride, 0.1 to 1 part of a nucleating agent and 0.1 to 0.6 part of anantioxidant. The preparation method comprises the following steps: premixing polypropyleneimine-modified nanometer silicon dioxide, polypropylene grafted maleic anhydride, the nucleating agent, the antioxidant and polypropylene resin, and carrying out extrusion granulation at 180-230 DEG C by virtue of an extruder so as to obtain the modified polypropylene. The polypropylene resin has good transparency, heat resistance, tensile strength and impact strength, and can be widely applied to the fields of thin-wall injection molding transparent meal boxes and the like.
Owner:WANHUA CHEM (SICHUAN) CO LTD +2
Surface amine functionalized rare earth doped BaFCl nanometer fluorescence labeling material and preparation method thereof
The invention discloses a surface amine functionalized rare earth doped barium fluochloride nanometer fluorescence labeling material and a preparation method thereof, and relates to a surface functionalized water soluble nanometer fluorescence labeling material preparation. The formula of the barium fluochloride nanometer fluorescence labeling material prepared by the method of the present invention is XLn<3+>-(1-x)BaFCl (Ln=Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb; X=0-60 mol% ). According to the preparation method, polypropylenimine is adopted as a surfactant, and a one-step reaction is performed to prepare the surface amine functionalized water soluble rare earth doped barium fluochloride nanometer fluorescence labeling material, wherein the results of transmission electron microscope, infrared absorption spectrum, gravitational thermal analysis and other test methods show that the polypropylenimine is effectively coated on the surfaces of the nanoparticles. The prepared nanometer powder has good solubility; with the amino groups on the surface, the basis is established for the further combination of the biological molecules; with the rare earth ion doping, the material can achieve the purposes of strong luminous intensity, and rare earth ion fluorescence emission with long fluorescence lifetime.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Phenylboronic acid-modified high polymer material and application thereof in intracellular delivery of gene editing ribonucleoprotein compound
ActiveCN111808279AEfficient deliveryExcellent intracellular delivery efficiencyStable introduction of DNAPolyamidePolypropylene
The invention provides application of a phenylboronic acid-modified high polymer material in intracellular delivery of a gene editing ribonucleoprotein compound. The phenylboronic acid-modified high polymer material is composed of a cationic polymer and a phenylboronic acid functional group, wherein the phenylboronic acid functional group is covalently connected to the cationic polymer; and the cationic polymer comprises a polyamide-amine dendrimer, polypropyleneimine, polylysine and the like. The phenylboronic acid-modified high polymer material can be used as an intracellular delivery carrier of the gene editing ribonucleoprotein compound, i.e., a carrier for delivering the gene editing ribonucleoprotein compound from a place outside a cell to a place inside the cell. A method of using the phenylboronic acid-modified high polymer material as the intracellular delivery carrier of the gene editing ribonucleoprotein compound can achieve high efficiency, has good gene editing effects ondifferent gene loci of the same cell and different types of cells, can maintain the biological activity of the ribonucleoprotein compound, and is low in toxicity to cells and good in biocompatibility.
Owner:EAST CHINA NORMAL UNIV +1
Method for detecting TBHQ by surface enhanced Raman spectroscopy
PendingCN112461813AGood catalytic propertiesHigh sensitivityRaman scatteringAgainst vector-borne diseasesQuinoneSurface-enhanced Raman spectroscopy
The invention discloses a method for detecting TBHQ by surface enhanced Raman spectroscopy, which relates to the technical field of chemical analysis, and comprises the following steps: carrying out surface enhanced Raman spectroscopy detection on TBHQ after carrying out catalytic oxidation by using a composite nano-enzyme, making a TBHQ working curve, and determining TBHQ in a sample according tothe working curve. According to the method, Cu-I / CDs are used as a reducing agent, polypropyleneimine is used as a protective agent, chloroauric acid is reduced, a composite nano-enzyme system composed of gold nanoparticles and CuI / CDs is obtained, due to the excellent catalytic characteristic of the composite nano-enzyme system, TBHQ is selectively oxidized into a red oxidized quinones substance, and based on the surface enhanced Raman characteristic of a TBHQ oxidation product, a novel method for detecting TBHQ by surface enhanced Raman spectroscopy with high sensitivity and strong selectivity is established.
Owner:YUNNAN TOBACCO QUALITY SUPERVISION MONITORING STATION
Titanium sol modified geogrid and production method thereof
InactiveCN106117714APromote oxidation chain reactionReduce free radical contentMicrocrystalline waxAntioxidant
The invention discloses a titanium sol modified geogrid, which is composed of the following raw materials in parts by weight: aluminum nitride powder 2-3, polypropylene imine 10-17, tert-butyl acrylate 6-8, Lithium aluminum hydride 0.1‑0.3, 4‑dimethylaminopyridine 0.3‑1, antioxidant 10100.4‑1, multi-walled carbon nanotubes 10‑15, antioxidant 1680.6‑1, high density polyethylene 140‑160, lignin Sodium sulfonate 1‑2, butyl benzyl phthalate 4‑7, dibasic lead phosphite 0.04‑0.1, triethanolamine 1‑2, microcrystalline paraffin 3‑4, silane coupling agent kh5600.6‑1 , Tetrabutyl titanate 3‑4. The combination of antioxidant 1010 and antioxidant 168 added in the present invention can eliminate alkyl free radicals, peroxyl free radicals, alkoxyl free radicals and hydroperoxides, and greatly reduce the freedom to participate in polymer autooxidation chain reactions. The base content can delay the oxidative degradation process of the polymer and improve the oxidation resistance of the finished material.
Owner:ANHUI JIEAOMAKE SYNTHETIC MATERIAL TECH
Hybridized dendrimer-loaded bimetal metal nanoparticle catalyst as well as preparation method and application thereof
ActiveCN104338558AHigh activityIncrease the degree of hydrogenationMaterial nanotechnologyOrganic chemistryPtru catalystAcrylonitrile
The invention discloses a hybridized dendrimer-loaded bimetal metal nanoparticle catalyst as well as a preparation method and application thereof. The hybridized dendrimer-loaded bimetal metal nanoparticle catalyst is a compound using hybridized polypropyleneimine (PPI) as a carrier and ruthenium and rhodium as metal nanoparticles. The preparation method comprises the following steps: modifying a primary amine group at the periphery of integral-algebra polypropyleneimine by using fifteen-element triene nitrogen heterocycle (MAC) to synthesize a novel hybridized dendrimer loading fifteen-element triolefin large ring on the surface and having different-algebra PPI; and then by adopting a method of co-complexing-reducing with two kinds of metal ions and using GnPPI-M (n=2, 3, 4, 5) as a carrier, preparing Ru / Rh bimetal DTNs with different Ru / Rh proportions, and by using the Ru / Rh bimetal DTNs as a catalyst, performing catalytic hydrogenation on butadiene-acrylonitrile rubber. The catalyst prepared by adopting the preparation method has excellent catalytic activity and selectivity, and can be recycled.
Owner:YINGDE BOTE CHEM INDAL
Preparation method of caramel inflaming retarding liquid and method for inflaming retarding finishing of wool fiber product
ActiveCN111593560ASufficient sourcePlay a flame retardant effectHeat resistant fibresAnimal fibresWool fiberPolymer
The invention relates to a preparation method of caramel inflaming retarding liquid and a method for inflaming retarding finishing of a wool fiber product. The preparation method of the caramel inflaming retarding liquid comprises the steps that after the pH value of a micromolecule sugar solution is adjusted through a poly propylene imine polymer, caramelization is carried out under the alkalinecondition, the caramel inflaming retarding liquid is prepared, and micromolecule sugar is monosaccharide or disaccharide. The method for inflaming retarding finishing of the wool fiber product comprises the steps that after the pH value of the caramel inflaming retarding liquid is adjusted to be acid, the caramel inflaming retarding liquid is used as inflaming retarding finishing liquid, the woolfiber product is finished through a dipping-roasting method, and the roasting temperature is not lower than the temperature that the poly propylene imine polymer and the wool fiber product generate achemical reaction. In the method, the raw materials monosaccharide and disaccharide are natural materials, and the prepared caramel inflaming retarding liquid is an environment-friendly inflaming retarding system. In the method, the raw materials are easy to obtain, the preparation process is simple, the prepared inflaming retarding wool fiber product has good inflaming retarding performance and washing resistance, and important inflaming retarding value is achieved.
Owner:NANTONG TEXTILE & SILK IND TECH RES INST +1
Method for quickly separating RBCs used for immunochromatography kit
ActiveCN110824157AQuick combinationSettling fastMaterial analysisAntiendomysial antibodiesRed blood cell
The invention provides a method for separating RBCs (Red Blood Cell) from whole blood, wherein the core of the method is an RBC separating agent which comprises the following components: carboxyl polystyrene microspheres, active group dendritic polymers and anti-human RBC antibodies; wherein the active group dendritic polymer is polylysine, dendritic polyamidoamine or polypropylenimine n-dotriacontane amine. The RBC separating agent is realized by utilizing a polylysine modified polystyrene microsphere-antihuman RBC antibody compound, the RBC separating agent is added into a sample diluent ofan immunochromatography kit or a specific blood processing tube thereof in advance, the RBC separating agent can be quickly combined with RBCs in a test sample in the testing process to quickly form ahuge reticular structure, and quick sedimentation is realized under the action of gravity, so that a supernatant required by reaction is obtained.
Owner:GUANGZHOU KEFEN BIOTECH CO LTD
Method for quickly detecting tert-butylhydroquinone in food
ActiveCN112345474ARapid responseSmooth responsePreparing sample for investigationColor/spectral properties measurementsBiotechnologyQuinone
The invention discloses a method for quickly detecting tert-butylhydroquinone in food, which comprises the following steps: reducing chloroauric acid by using copper iodine doped carbon dots as a reducing agent and polypropyleneimine as a protective agent to obtain gold nanoparticles, forming a mixed nano-enzyme system by using excessive Cu-I / CDs and AuNPs, and establishing a novel high-sensitivity and high-selectivity TBHQ detection method by using tert-butylhydroquinone as a substrate and oxidized TBHQ as a red oxidized quinones substance based on the linear relationship between the TBHQ concentration and the red oxidized TBHQ, wherein the detection limit is 0.5 mg / kg; the method is applied to the detection and analysis of TBHQ in food, and the result conforms to the determination methodof nine antioxidants in food of the national food safety standard GB5009.32-2016; the method can only selectively oxidize TBHQ, other antioxidants do not have the reaction, and the method has the characteristics of high sensitivity, strong specificity, simplicity and rapidness in operation and the like.
Owner:KUNMING UNIV OF SCI & TECH
Preparation method of dendritic macromolecule modified magnetic attapulgite surface imprinted polymer
ActiveCN110684157ALarge specific surface areaGood chemical stabilityOther chemical processesAlkali metal oxides/hydroxidesPolymer scienceFunctional monomer
The invention relates to the technical field of molecular imprinting, and discloses a preparation method of magnetic attapulgite surface imprinted polymer modified by dendritic macromolecules. The preparation method comprises the following steps: 1) preparing magnetic attapulgite nanoparticles; 2) alkylating that magnetic attapulgite nanoparticles; 3) grafting: adding alkylate magnetic attapulgitenanoparticles into polypropylene imine solution, stirring and reacting to obtain polypropylene imine magnetic attapulgite nanoparticles; 4) preparing imprinted polymer: mixing template molecules, polypropylene imine magnetic attapulgite nanoparticles and acetonitrile, standing, separating solid particles, adding solid particles, functional monomer, crosslinking agent and initiator into acetonitrile, stirring, reacting, magnetically separating and drying, washing template molecules through Soxhlet extraction, separating and drying. The magnetic attapulgite surface imprinted polymer prepared bythe invention has the characteristics of large adsorption capacity and no easy desorption.
Owner:ZHEJIANG OCEAN UNIV
Preparation method of polypropylene imine modified magnetic nanocrystalline cellulose molecular imprinted polymer
InactiveCN110694599ALarge specific surface areaIncrease profitOther chemical processesCellulosePolymer science
The invention relates to the technical field of imprinted polymers, and discloses a preparation method of a polypropylene imine modified magnetic nanocrystalline cellulose molecular imprinted polymer.The preparation method comprises the following steps: 1) preparing magnetic nanocrystalline cellulose; 2) carrying out alkylation treatment; 3) adding alkylated magnetic nanocrystalline cellulose into a polypropylene imine solution to obtain polypropylene imine grafted nanocrystalline cellulose; and 4) adding the polypropylene imine grafted nanocrystalline cellulose, paclitaxel and a methacrylicacid monomer into an acetone solvent to carry out stirring and dissolving, adding ethylene glycol dimethacrylate and azobisisobutyronitrile, and carrying out heating for reacting to obtain the polypropylene imine modified magnetic nanocrystalline cellulose molecular imprinted polymer. According to the invention, nanocrystalline cellulose is use as a carrier, and the functional monomer methacrylicacid is crosslinked on the surface of a carrier to form spherical imprinted polymer microspheres. The spherical imprinted polymer microspheres have a high specific surface area, binding sites with template molecules are increased, and thus the utilization rate of imprinted polymer molecules is increased.
Owner:ZHEJIANG OCEAN UNIV
Alicyclic compound modified high-molecular material and preparation method and application thereof
The invention provides an alicyclic compound modified high-molecular material. The alicyclic compound modified high-molecular material comprises an alicyclic compound gene and a cationic high-molecular skeleton, wherein the alicyclic compound gene is covalently connected with the surface of the cationic high-molecular skeleton, the cationic high-molecular skeleton comprises polyamidoamine dendrimers, polypropyleneimine dendrimers, polylysine dendrimers, branched polyethyleneimine cationic polymers and linear polyethyleneimine cationic polymers. The invention further provides a preparation method of the high-molecular material and application as a biological macromolecular transfection vector. The synthesis cost of the high-molecular material provided by the invention is low, the cytotoxicity is low, the biocompatibility is high, gene molecules can be effectively and safely delivered into cells, the high-molecular material can be used as the gene transfection vector having the advantages of high efficiency, low toxicity, low cost and the like, and the application prospect is good.
Owner:EAST CHINA NORMAL UNIV
Wet-heat resistant and antioxidant geogrid and preparation method thereof
InactiveCN106117717AReduce free radical contentReduce oxidative degradationPhosphateChlorinated paraffins
The invention discloses a geogrid resistant to heat and humidity, which is composed of the following raw materials in parts by weight: zinc dihydrogen phosphate 4-5, phosphite 2-3, dimethyl diallyl chloride Ammonium 0.6‑1, polypropylene imine 10‑17, tert-butyl acrylate 6‑8, lithium aluminum hydride 0.1‑0.3, 4‑dimethylaminopyridine 0.3‑1, antioxidant 10100.4‑1, multi-walled carbon nanotubes 10-15, antioxidant 1680.6-1, high-density polyethylene 140-160, chlorinated paraffin 4-6, titanium dioxide 10-12, butyltin trioctoate 0.4-1, amino trimethylene phosphonic acid 0.1-0.2, di Phenylsilanediol 2‑3, calcium hexafluoroacetylacetonate 0.4‑1. The geogrid of the invention has good resistance to heat and humidity, good impermeability, and is not easy to corrode.
Owner:ANHUI JIEAOMAKE SYNTHETIC MATERIAL TECH
Hybrid dendritic polymer supported metal catalyst and preparation method and application thereof
ActiveCN106179504AHigh activityHigh selectivityOrganic-compounds/hydrides/coordination-complexes catalystsCatalytic reactionsImideMetal catalyst
The invention discloses a hybrid dendritic polymer supported metal catalyst and a preparation method and application thereof. The catalyst is characterized in that polyacrylic imide modified by a 15-membered triolefinic macrocycle is taken as a carrier; one or two of Ru<3+>, Rh<3+>, Pd<2+>, Pt<2+> and Pt<4+> are taken as compounds of metal ions. In the preparation method, Gn1-M is taken as a carrier, and a way of complexing the carrier with the metal ions is adopted to prepare the metal catalyst. The metal catalyst is applied to catalytic hydrogenation on an unsaturated dialkene polymer. The catalyst prepared by the method has superior catalytic activity and selectivity, and efficient recovery of noble metal catalysts can be realized.
Owner:株洲淳华氢能科技开发有限公司
Non-viral genetic vector material and preparation method and application thereof, and brain-targeted gene transfer system and preparation method and application thereof
ActiveCN103435814AMild reaction conditionsDoes not elicit an immune responseNervous disorderGenetic material ingredientsNervous systemBiocompatibility Testing
The invention provides a non-viral genetic vector material and a preparation method and application thereof. Biodegradable golyglutamic acid is used as a skeleton of the non-viral genetic vector material and is connected with a poly(propyleneimine) dendrimer rich in amino groups; the non-viral genetic vector material has the characteristics of low toxicity, a high transfection rate, biodegradability and good biocompatibility and can be used for preparation of a treatment instrument for treating primary degenerative diseases of a central nervous system. The invention further provides a brain-targeted gene transfer system prepared through coupling of the non-viral genetic vector material with lactoferrins and a preparation method and application thereof. The brain-targeted gene transfer system can be used for preparation of the treatment instrument for treating primary degenerative diseases of the central nervous system.
Owner:SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI +1
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