359 results about "Diallyldimethylammonium chloride" patented technology

The invention provides a method for preparing magnetic ferroferric oxide/conductive polyaniline light-weight composite hollow microspheres, which relates to a method for preparing a magnetic ferroferric oxide/conductive polyaniline composite material. The invention solves the problems of high density and easy agglomeration of the traditional magnetic nanometer particle/conductive polymer composite material. The method comprises the following steps of: regulating ferrous chloride and ferric chloride solutions to be alkaline, adding sodium dodecyl benzene sulfonate and reacting to obtain ferroferric oxide; and modifying hollow glass microspheres by using poly(diallyldimethylammonium chloride) solutions after alkaline cleaning, then reacting the hollow glass microspheres with the ferroferric oxide, sequentially immersing obtained solid particles by using the poly(diallyldimethylammonium chloride) solutions and polystyrene sulfonic acid solutions, then adding the solid particles to aniline solutions, initiating polymerization by using ammonium persulfate, and washing and drying the solid particles to obtain the composite hollow microspheres. The composite hollow microspheres have both conductivity and magnetism, the density is 0.78-0.8g/cm<3>, and the composite hollow microspheres are not easy to agglomerate and are used for fields of military equipment stealth technology and civil anti-electromagnetic radiation.

A method comprising the steps of: (A) forming a fluid comprising a crosslinked polymer, wherein the crosslinked polymer comprises: (i) a first monomeric unit of one or more N-vinyl lactams; and (ii) a crosslinker selected from the group consisting of: divinyl ether, diallyl ether, vinyl or allyl ethers of polyglycols or polyols, divinylbenzene, 1,3-divinylimidazolidin-2-one, divinyltetrahydropyrimidin-2(1H)-one, dienes, allyl amines, N-vinyl-3(E)-ethylidene pyrrolidone, ethylidene bis(N-vinylpyrrolidone), and any combination of any of the foregoing; and (B) introducing the fluid into a portion of a well. The crosslinked polymer may additionally comprise: a second monomeric unit selected from the group consisting of: acrylamide, N-substituted acrylamides, methacrylamide, N-substituted methacrylamides, acrylates, methacrylates, acrylic acid, methacrylic acid, N-vinylamides, N-allyl amides, vinyl alcohol, vinyl ethers, vinyl esters, allyl alcohol, allyl ethers, allyl esters, vinylpyridine, vinyl sulfonates, allyl sulfonates, vinylimidazole, allylimidazole, diallyldimethylammonium chloride, and any combination of any of the foregoing.

The invention discloses a preparation method of a flexible transparent conducting polymer thin film with antibacterial properties, and belongs to the technical field of nanocomposite materials. The preparation method comprises the steps: preparing stably dispersed graphene oxide (GO) colloid by a Hummers method at first; next, performing surface modification on the graphene oxide under the electrostatic adsorption action of poly(diallyldimethylammonium chloride) (PDDA) and preparing a nanowire/graphene nano hybrid material by a method of inducing the growth of silver nanowires in situ, and then further preparing a silver nanowire/graphene/polyvinyl alcohol thin film by a solution casting method. The thin film has the characteristics of antibiosis, high electricconductivity, high lighttransmittance, flexibility and the like, and is expected to be applied to a plurality of fields such as biosensing and nano-devices; and therefore, the flexible transparent conducting polymer thin film with antibacterial properties has a wide application prospect.

The invention discloses a high polymer composite coagulant for disposing oily wastewater and preparing method, which comprises the following steps: setting ingredient and weight ratio of high polymer composite coagulant with polymeric aluminium chloride : polymeric ferric sulfate : soluble glass : polydiene propyl dimethyl amchlor : water = 39.00:(1.90-2.10):(0.26-0.31):(1.04-1.52):(57.80-57.10); setting 0.02% basic ion polyacrylamide in polydiene propyl dimethyl amchlor; preparing finite density water solution with raw material as first step; preparing flocculant intermediate with polyaluminium chloride, polymeric ferric persulfate and sodium silicate as second step; proceeding mixed reaction with flocculating agent intermediate of the second step and polydiene propyl dimethyl amchlor of 0.02% positive ion polyacrylamide; controlling condition as temperature at 70-90 deg.c, pH value at 4-7; stirring intensity at 50-70r/min and ripening time at 6-24h.

The present invention is directed to the use of a combination of a polymeric chelant and coagulant to treat metal containing wastewater. More particularly, the invention is directed at removing copper from CMP wastewater. The composition includes a combination of (a) a polymeric chelant derived from a polyamine selected from the group consisting of diethylenetriamine (DETA), triethylenetetraamine (TETA), tertraethylenepentaamine (TEPA), poly[vinylamine], and branched or linear poly[ethylenimine] (PEI); and (b) a water soluble or dispersible copolymer of a tannin and a cationic monomer selected from the group consisting of methyl chloride or dimethyl sulfate quaternary salt of dimethyl aminoethyl acrylate, diethylaminoethyl acrylate, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, dimethylaminopropyl methacrylamide, dimethylaminopropyl acrylamide, and diallyl dimethyl ammonium chloride.

The invention discloses a dual-mode optical imaging probe and a preparation method thereof. The dual-mode optical imaging probe comprises nano particles which are dispersed in a water solution, each nano particle comprises a core body and a wrapping layer, wherein the core body is a gold or silver nano aggregate; the wrapping layer is multilayer PDDA (Poly (Diallyldimethylammonium Chloride)) and PSS (Poly Sodium Styrenesulfonate) which are alternately adsorbed; and the outermost layer of the wrapping layer is PDDA with fluorescent materials absorbed. The preparation method of the dual-mode optical imaging probe comprises the following steps of: preparing the Raman marker-induced gold or silver nano aggregate; then adding a PDDA water solution to a water solution of the Raman marker induced gold or silver nano aggregate, stirring, and then alternately adsorbing PSS and PDDA for multiple times; then adding the fluorescent materials and the PDDA water solution, and the like. The dual-mode optical imaging probe has both surface enhanced Raman signals and fluorescent signals, high sensitivity, easiness of optical probe multifunction realization and important application values in the fields of drug targeted transportation, biological sensing, detection, and the like; and the preparation method of the dual-mode optical imaging probe has the advantages of easiness of operation, good repeatability, low cost and environmental friendliness.

The invention discloses a high-temperature saturated salt resistant fluid loss reducer for water-based drilling fluid, and aims at solving the problems that the existing fluid loss reducer for drilling fluid difficultly meets the requirements for high-temperature resistance and high-concentration salt resistance of complex formation. The fluid loss reducer is prepared from the following raw materials: 2-acrylamide-2-methylpropanesulfonic acid, acrylamide, acrylic acid, N-vinyl pyrrolidone, diallyldimethylammonium chloride and the like. The preparation method is simple, the reaction condition is mild, the conversion rate is high, the requirement for equipment and environment is low, and industrial batch production of the fluid loss reducer can be realized easily. The fluid loss reducer can effectively reduce water loss of the drilling fluid, can resist high temperature (230 DEG C) and the saturated salt, and has remarkably superior effect to the varieties of the existing fluid loss reducers.

The invention in particular relates to a graphene tube-wrapped metal nitride nanobelt and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a metal oxide precursor nanobelt; (2) stirring and ultrasonically dispersing the weighed and dried metal oxide precursor nanobelt in distilled water, adding a poly dimethyl diallyl ammonium chloride solution, continuously stirring, centrifuging, measuring graphene oxide dispersion liquid prepared by adopting an Hummer process, dropwise adding the metal oxide precursor nanobelt obtained by centrifuging into the graphene oxide dispersion liquid, ultrasonically dispersing and stirring, after dispersing uniformly, performing suction filtration, and drying; and (3) stripping a dried membrane from a filter membrane, and annealing in an ammonia gas atmosphere. According to the prepared graphene tube-wrapped metal nitride nanobelt, the specific surface area of a material can be enlarged, the one-dimensional nanostructure provides a one-dimensional channel for electrolyte flow and ionic migration, and the electrochemical performance is good.

Ultrahigh-toughness concrete and a preparing method thereof are disclosed. The concrete is prepared from, by weight, 380-580 parts of cement, 150-170 parts of slag powder, 250-380 parts of fly ash, 200-400 parts of quartz sand, 13-15 parts of bamboo wood phenolic alcohol liquified resin, 13-18 parts of polypropylene resin, 0.5-1.5 parts of carboxymethylcellulose, 23-47 parts of core-shell acrylic acid elastic emulsion, 5-10 parts of a chemical-resistant modifier, 14-18 parts of bamboo fibers, 2.5-8.5 parts of nanometer silicon particles, 7-13 parts of nanometer calcium carbonate, 3-5 parts of anionic polyacrylamide, 3.7-8.3 parts of poly(diallyldimethylammonium chloride), 0.4-1 part of poly(ethylene glycol) acrylate, 20-30 parts of an acrylic emulsion, and the like. The ultrahigh-toughness concrete has high tensile strength, high compressive strength, ultrahigh ductility, good energy consumption capacity and good elastic modulus.

The preparation process of composite magnetic microball includes the following steps: mixing polystyrene micorball with concentrated sulfuric acid to sulfonate polystyrene micorball; dispersing the sulfonated polystyrene micorball with surface negative charge successively in ammonium polydiallyl dimethyl chloride aqua, sodium polystyrene sulfonate aqua and ammonium polydiallyl dimethyl chloride aqua for standing adsorption before centrifugal water washing; dispersing in dilute magnetic fluid liquid for standing adsorption before centrifugal water washing; repeating the two standing adsorption steps until reaching the required layer number of ammonium polydiallyl dimethyl chloride and Fe3O4 of the composite magnetic microball. The said process is completed in aqua and has no environmental pollution.

The invention relates to a phospholipid bilayer membrane array fabricated by a multilayer polyelectrolyte membrane substrate and a fabrication method. A static layer-by-layer self-assembly technology is adopted to fabricate polyelectrolyte poly-(4-sodium styrene sulfonate) (PSS) and poly-(diallyl dimethyl ammonia chloride) (PDDA) multilayer membranes on a silicon substrate modified by 3-ammonia propyltriethoxysilane, the modified substrate is subjected to patterning by a photetching technology, arrays of a polyelectrolyte in different types are fabricated, a phospholipid bilayer membrane is fabricated at the bottoms of the arrays, and the phospholipid bilayer membrane array is fabricated. According to the method, the layer-by-layer assembly technology is introduced into the fabrication of the patterned substrate, the fabrication method of the phospholipid bilayer membrane array is enriched and expanded, the method has the advantages of simplicity in operation, mild reaction conditions, good controllability, high stability, low cost and the like, and a reliable technology is provided for the research and application of biological membrane characteristics with respect to the fields of membrane biophysics, interface chemistry, biochemistry, bionics and micro-nano technologies.

The invention provides a nano ferric oxide-cationic polyelectrolyte coupled multielement composite flocculant, relating to an inorganic-organic composite flocculant. The invention provides a novel high-efficiency composite flocculant compounded by nano ferric oxide and cationic polyelectrolyte, wherein the nano ferric oxide is nano alpha-FeOOH, Fe3O4, alpha-Fe2O3, gamma-Fe2O3 and the like, and the cationic polyelectrolyte is polyamine, polyacrylamide, poly (diallyldimethylammonium chloride), chitosan and the like. The composite flocculant provided by the invention is applicable to micro-pollution water source strengthening treatment, the treatment effect on toxic and harmful pollutants (heavy metals, toxic organic matters and the like), humic acid and chromaticity is higher, and the composite flocculant provided by the invention has the advantages of good separating effect, rapid sedimentation, low effluent turbidity, wide pH application range and the like.