51results about How to "Grafting is firm" patented technology

The invention discloses an organic/inorganic hybridization solar cell and a production method thereof, wherein a zinc oxide (ZnO) nanorod array ZnO-sodium (Na) which is vertically grown on an indium tin oxide (ITO) lining base is utilized as a template, a nanorod array ZnO-natural rubber (NR)-quantum dot (QD)-NA which takes a ZnO nanorod as a core and a polycrystal film which consists of ZnO quantum dots as an inorganic finishing shell layer is prepared, an organic matter N719 is utilized to modify the ZnO-NR-QD-NA, so a homogeneous core-shell structure nanorod array ZnO-NR-QD-N719-NA which is modified by the N719 is obtained, a polymer and the ZnO-NR-QD-N719-NA are compounded to produce a finished product, the open-circuit voltage of the cell reaches 0.62V, the short-circuit current of the cell is 3.79mA/cm<2>, and the conversion efficiency of the cell reaches 0.84%. Compared with a phenylacetylene (MEH-PPV)/ZnO-NA cell, the open-circuit voltage of the cell is improved by 88%, the short-circuit current is increased by 192%, and the conversion efficiency is improved by 425%.

The invention discloses a hardening liquid. The hardening liquid comprises the following components in percentage by mass: 1-70% of modified inorganic nanoparticles, 30-99% of curable resin or oligomer, 0-5% of an additive and 0-65% of a solvent, the modified inorganic nano particles comprise inorganic nano particles and surface grafting modified chain segments bonded with the inorganic nano particles; the surface grafting modified chain segment comprises at least one polymerizable group; and the surface grafting modification chain segment is bonded with the inorganic nano particles through a-SiR1R2-group and/or-R1OTiOR2-group, wherein R1R2 is at least one of alkyl, alkoxy, alkynyl, aryl, acrylic acid group, ester group, ether group and carboxyl. According to the hardening liquid, the usage amount of the dispersing agent can be reduced, even the inorganic nano particles can be stably dispersed without adding the dispersing agent, and a coating of the hardening liquid has good mechanical performance.

The invention discloses environment-friendly and sterilization diatom ooze coating. The environment-friendly and sterilization diatom ooze coating comprises the following raw materials in parts by weight: 50-55 parts of natural diatom ooze, 15-20 parts of negative ion powder, 10-13 parts of sepiolite powder, 7-10 parts of a polylactic acid-chelated silver ion sterilization agent, 7-9 parts of vermiculite powder, 3.2-3.6 parts of a toughening agent, 1.2-1.5 parts of an emulsifying agent, 1.2-1.5 parts of a curing agent, 1.4-1.7 parts of a de-foaming agent, 1.3-1.6 parts of a leveling agent, 0.7-1 part of a leveling auxiliary agent, 0.8-1.2 parts of a mildew-proof agent, 1.8-2.2 parts of a dispersant, 1.2-1.5 parts of a film-forming auxiliary agent and 55-60 parts of de-ionized water. The environment-friendly and sterilization diatom ooze coating disclosed by the invention has a good sterilization performance, is environmentally friendly and durable and is good indoor coating.

The invention relates to a cyanuric chloride-based quaternary ammonium salt compound and a preparation method thereof. The preparation method comprises the following steps of 1, stirring cyanuric chloride and 3-aminopropyltriethoxysilane in an organic solvent at a temperature of 0-5 DEG C for a reaction for 3-5h, 2, heating the system obtained by the step 1 to 25-40 DEG C, carrying out stirring for 10-15min, adding triethylamine into the system, and sequentially carrying out stirring reaction for 8-12h to obtain a flavescent suspending liquid, and 3, carrying out centrifugal separation on the flavescent suspending liquid obtained by the step 2 to obtain flavescent solids, carrying out washing 3-5 times by an organic solvent and carrying out vacuum drying at a temperature of 60-90 DEG C to obtain the cyanuric chloride-based quaternary ammonium salt compound. Compared with the common quaternary ammonium salt compound, the cyanuric chloride-based quaternary ammonium salt compound has high charge density and can be stably grafted to the material surface by covalent bond effects. The preparation method does not need other assistants, utilizes cheap and easily available raw materials, has mild reaction conditions and can be operated conveniently.

The invention discloses a modified inorganic nano particle. The modified inorganic nano particle comprises an inorganic nano particle and a surface grafting modification chain segment bonded with the inorganic nano particle, the surface grafting modified chain segment comprises at least one polymerizable group; the surface grafting modification chain segment is bonded with the inorganic nano particles through a -SiR1R2-group and/or-R1OTiOR2-group; wherein R1R2 is at least one of alkyl, alkoxy, alkynyl, aryl, acrylic acid group, ester group, ether group and carboxyl. When the modified inorganic nanoparticles are used in the hardening liquid, the use amount of a dispersing agent can be reduced, even the inorganic nanoparticles can be stably dispersed without adding the dispersing agent, so that the negative influence of the dispersing agent, especially a macromolecular dispersing agent, on the hardening effect of the inorganic nanoparticles in a coating can be effectively reduced; and meanwhile, the mechanical property of the coating can be effectively improved.

The invention relates to the field of active carbon, and specifically relates to a photocatalysis active carbon fiber and a preparation method thereof. The preparation method comprises the following steps: in a vacuum microwave environment, spraying an atomized coupling agent on active carbon fibers, then soaking active carbon fibers in a nano titanium dioxide solution to graft nano titanium dioxide onto active carbon fibers, and drying the active carbon fibers to obtain the photocatalysis active carbon fiber. According to the preparation method, nano titanium dioxide with a high visible-light catalytic activity is grafted onto the active carbon fibers, and thus the active carbon fiber has an adsorption performance and also has a visible light catalyzing performance. The preparation method is simple, the preparation cost is low, and the prepared photocatalysis active carbon fiber has an excellent performance, and has an important meaning for promoting the application and development of organic matter decomposition.

The invention relates to a preparation method for a polymer separation membrane with high-efficiency persistent antibacterial and anti-pollution effects, and belongs to the scientific and technical fields of water treatment and membrane separation. According to the invention, through an electron transfer activation regeneration catalyst atom transfer free radical polymerization method, a quaternary ammonium salt is grafted at the surface of the polymer separation membrane, so that the anti-pollution performance of the polymer separation membrane can be effectively improved, the polymer separation membrane modified by the method has obvious inhibiting effects on reproduction of bacteria and microorganisms and good antibacterial performance, and the modified membrane has good separation performance and long-term stable antibacterial and anti-pollution effects. The method is simple in process, green and environmentally friendly, and the method can be operated under the lower content of acatalyst; and the polymer separation membrane has stronger operability in practical industrial production and potential and wide application value in the field of water treatment.

The invention discloses high-tenacity and shock-proof bactericidal diatom ooze coating, which comprises the following raw materials in parts by weight: 40 to 50 parts of nature diatomite, 14 to 16 parts of negative ion powder, 8 to 12 parts of polylactic acid chelated silver ion bactericide, 12 to 15 parts of light calcium carbonate, 9 to 12 parts of bentonite, 5 to 8 parts of talcum powder, 1.8 to 2.2 parts of dispersing agent, 1.2 to 1.5 parts of coalescing agent, 1.5 to 1.8 parts of emulsifier, 3 to 6 parts of pigment, 1.6 to 1.9 parts of wetting agent, 1.1 to 1.5 parts of smoothing agent, 1.4 to 1.7 parts of smoothing assistant, 1.6 to 1.9 parts of defoamer and 60 to 65 parts of deionized water. The high-tenacity and shock-proof bactericidal diatom ooze coating disclosed by the invention has good bactericidal performance, is environmental friendly and durable, and is good indoor coating.

The invention provides a preparation method of a fibrilia antibacterial functional material. The method comprises the following steps of soaking fibrilia in a tannic acid aqueous solution for a first reaction to obtain pre-modified fibrilia; and carrying out a second reaction on the pre-modified fibrilia, metal ions and organic amine to obtain the fibrilia antibacterial functional material. According to the invention, firstly, tannic acid is grafted on the surface of the fibrilia through hydrogen-bond interaction; after primary grafting of the tannic acid is completed, an aqueous solution of the metal ions and the organic amine is dropwise added under the ultrasonic action for further crosslinking, so that chelating bonds are formed between free phenolic hydroxyl groups of the tannic acid and the metal ions as well as between the metal ions and the organic amine, and the tannic acid is more firmly and uniformly grafted on the surface of the fibrilia; and due to the introduction of the organic amine, the distance between tannic acid and metal ion complexes is increased, uniform and firm grafting on the surface of the fibrilia is realized, and the application environment adaptability of the tannic acid grafted fibrilia is enhanced.

The invention relates to a preparation method of chitosan oligosaccharide grafted cellulose fiber. The preparation method comprises following steps: A, preparation of sodium methallyl sulfonate-chitosan, wherein chitosan oligosaccharide is added into hot water to prepare a chitosan oligosaccharide aqueous solution, the chitosan oligosaccharide aqueous solution is cooled to room temperature, sodiummethallyl sulfonate is added into the chitosan oligosaccharide aqueous solution, an obtained mixture is subjected to stirring and heating, and potassium persulfate is added so as to obtain the sodiummethallyl sulfonate-chitosan oligosaccharide solution; B, cellulose fiber pretreatment, wherein cellulose fiber and soft water are introduced into a pretreatment tank, heating, stirring, water discharging, dehydration, and drying are carried out so as to obtain pretreated cellulose fiber; and C, preparation of chitosan oligosaccharide grafted cellulose fiber, wherein the cellulose fiber obtainedin step B is introduced into a reaction vessel, the sodium methallyl sulfonate-chitosan oligosaccharide solution obtained in step A is added, water is added, and stirring, heating, and centrifugal dewatering are carried out so as to obtain the chitosan oligosaccharide grafted cellulose fiber.

The invention discloses a preparation method of a cellulose antibacterial material modified based on a natural active component chlorogenic acid, which comprises the steps of dissolving cellulose in amixed aqueous solution of sodium hydroxide and urea to prepare a cellulose solution; adding anhydrous sodium sulfate into the obtained cellulose solution, stirring, and freezing until the cellulose solution is solidified; soaking the solidified mixture in water until the material floats on the water surface to obtain a cellulose material; mixing the cellulose material with a sodium hydroxide aqueous solution and epoxy chloropropane, and then cleaning the cellulose material with deionized water until the sodium hydroxide aqueous solution and the epoxy chloropropane have no residue; and takingout the cellulose material, a sodium carbonate solution and a chlorogenic acid ethanol solution, and washing the cellulose material with water until the cellulose material is not decolorized to obtainthe chlorogenic acid modified cellulose antibacterial material. The chlorogenic acid and the cellulose are covalently connected by adopting the epoxy chloropropane, so that the antibacterial agent can be more stably grafted on the surface of the cellulose, the antibacterial agent is prevented from falling off, and a good antibacterial effect is kept for a long time.

The invention discloses a paper gypsum board with high strength and low absorbability, and relates to the technical field of gypsum material. The paper gypsum board is prepared by compositing of an intermediate base layer and surface protective paper at the outer side. The intermediate base layer is a gypsum board layer. The prepared light-weight high-strength gypsum board has excellent strength and low water absorption.

The invention relates to a preparation method of a pH-sensitive antioxidant nano-carrier. The preparation method comprises the following steps: (1) dissolving chitosan in distilled water to obtain a chitosan solution; (2) completely dissolving N-acetyl-L-histidine in dimethyl sulfoxide, and then adding N, N'-diimidazole; evaporating the solution to dryness after stirring, adding the chitosan solution and performing stirring, and performing freeze-drying after dialysis to obtain N-acetyl-L-histidine grafted chitosan; (3) taking coupling agents EDC and NHS, and adding N-acetylcysteine after uniform stirring to obtain carboxyl-activated N-acetylcysteine; and (4) mixing the N-acetyl-L-histidine grafted chitosan with the carboxyl-activated N-acetylcysteine, and then adding the mixture into a TEMED/HCI buffer solution; and reacting for 6-10h under magnetic stirring, performing dialysis by using a dialysis bag, and then carrying out freeze-drying treatment to obtain the pH-sensitive antioxidant nano-carrier. The antioxidant nano-carrier prepared by the invention can promote the survival of stem cells, and efficiently delivers and releases drugs in an acidic microenvironment in a targeted manner.