104 results about "Poly(diallyldimethylammonium chloride)" patented technology

A shampoo composition with improved in use hair feel, comprising associative thickeners and liquid crystals formed from anionic surfactants and polyDADMAC and wherein the liquid crystals have a particle size greater than about 1 micrometer.

The invention relates to a precious-metal nanometer bipyramid and a preparing method thereof. The method includes the steps that an Au decanedron nano-particle protected with poly diallyldimethylammonium chloride serves as a seed, and Pd grows on the surface of the Au decanedron nano-particle in the [110] direction into the bipyramid. When prepared with the method, the Au and Pd nanometer bipyramid controllable in size and uniform in shape can be prepared. According to the Au and Pd nanometer bipyramid prepared with the method, high reproducibility is achieved, and convenience is brought to mass production; high water solubility is achieved, and a biological application in the future is facilitated; in addition, the Au and Pd nanometer bipyramid prepared with the method has a high-index crystal face, is good in catalysis activity and is potential formic acid fuel cell anode catalysts. The method is simple in preparing technology and low in cost and device requirement, and has the good industrial application prospects.

The invention discloses a method for in-situ modification of a three-dimensional carbon microbial fuel cell by nanometer porous molybdenum carbide. According to the method, a carbon felt electrode is used as a substrate, phosphomolybdic acid is used as a molybdenum source, the porous-structured nanometer molybdenum carbide is uniformly grown on carbon felt fiber in an in-situ way by two steps of electrostatic self-assembly of a poly diallyldimethylammonium chloride medium and high-temperature carbonization under reduction atmosphere, and the method is simple in operation step and is controllable. The prepared three-dimensional composite electrode is applied to a positive electrode of the microbial fuel cell; and compared with a non-modified carbon felt electrode, the three-dimensional composite electrode has the advantages of larger electrochemical active area and better biological compatibility, and has unique electrocatalytic activation on oxidization-reduction reaction of an electron medium, the activation overpotential of the positive electrode is reduced, and the generation power density of the microbial fuel cell is remarkably improved.

The invention discloses a soil contamination repairing agent. The soil contamination repairing agent is prepared from, by weight, 25-35 parts of bentonite, 17-20 parts of poly diallyldimethylammonium chloride, 15-20 parts of mica, 10-15 parts of nano waterborne adhesive, 6-12 parts of chitosan fibers, 0.004-1 part of polyethylene glycol acrylate, 24-36 parts of anionic polyacrylamide, 12-22 parts of monopotassium phosphate, 5-11 parts of nano-hydroxyapatite, 25-45 parts of culture pond sludge, 11-19 parts of bamboo pulp, 6-14 parts of ferric sodium edelate, 11-19 parts of sugar alcohol magnesium, 0.8-1.8 parts of enzyme microorganisms, 45-65 parts of Maya blue powder and 1-3 parts of mixed microbes. The repairing agent has the functions of soil contamination treatment, soil improvement, degradation of pesticide and fertilizer residues, increase of soil nutrients and the like.

The invention discloses a surface-enhanced Raman scattering substrate and a preparation method thereof. The substrate is sequentially immersed in the first cleaning solution, the second cleaning solution and the third cleaning solution, and subjected to ultrasonic treatment respectively; solution, 4‑styrene sulfonate sodium aqueous solution, and polydiallyldimethylammonium chloride aqueous solution for modification; the gold nanoparticle sol was co-cultured with the substrate modified by multiple charges, and physical deposition and electrostatic interaction The solid substrate of the SERS active gold nanoparticle film was prepared by the action. The preparation method of the SERS substrate provided by the present invention is simple and easy to implement, has low requirements on equipment, and can realize the preparation of a large-area SERS substrate. The prepared SERS substrate has good performance and has a certain application prospect in biochemical detection.

The invention relates to a preparation method for poly diallyldimethylammonium chloride functionalized graphene. The preparation method for poly diallyldimethylammonium chloride functionalized graphene comprises the steps of taking 80-100 mL of a graphite oxide solution of 1 mg* ml<-1>; ultrasonically treating the graphite oxide solution for 2-3 h, so that the graphite oxide solution is peeled off to form a graphene oxide solution; adding 2-3 mL of a 20% PDDA solution to 100 mL of deionized water; uniformly mixing the PDDA solution with the deionized water; adding the graphene oxide solution to the PDDA solution under magnetic stirring; continuing to stir the mixed solution for 20-50 min; adding 3-4 mL of 80% hydrazine hydrate; after uniformly stirring the mixed solution, placing the stirred solution in a hydrothermal reactor to react for 2-4 h at 80-120 DEG C; after cooling, centrifuging and washing with the deionized water; and drying at 60-80 DEG C in a vacuum manner to obtain the PDDA functionalized graphene. PDDA functionalized graphene has the advantages that the dispersibility of PDDA functionalized graphene in the water is improved, graphene is also endowed with the positive electrical property, PDDA functionalized graphene provides a very good matrix for the preparation of a graphene-based composite material, and the application of graphene in electroanalytical chemistry is expanded.

Flowable liquid suspensions are described comprising blends of particulate water soluble high molecular weight polymer flocculants. The polymer flocculants can include polyethylene oxide, polyacrylamide, polyDadmac, Dadmac-acrylamide copolymers, copolymers thereof and combinations thereof. The suspension allows the use of fine powders while reducing potential air quality and safety issues. The suspensions generally settle when mixing is stopped, but a uniform dispersion results when the suspensions are mixed, and the mixed suspensions can be delivered for use. The flocculant suspensions can be used for waste water purification, fiber dewatering, and the like.

The invention provides a preparation method of polyelectrolyte microcapsules. The preparation method includes the following steps that firstly, an organic solution of hydrophobic matter, an emulgator and a first polyelectrolyte are mixed in water to obtain emulsion, wherein the first polyelectrolyte is an anionic polyelectrolyte or a cationic polyelectrolyte, the anionic polyelectrolyte includes one or more of polyacrylic acid, carboxymethylcellulose, sodium alginate, sulfonated cellulose and sodium polystyrene sulfonate, and the cationic polyelectrolyte includes one or more of polylysine, deacetylchitin, cationic starch, poly allyamine hydrochloride and poly diallyldimethylammonium chloride; secondly, the emulsion obtained in the first step is dripped into an aqueous solution of a second polyelectrolyte to obtain the polyelectrolyte microcapsules, wherein ionogenic groups of the first polyelectrolyte and the second polyelectrolyte carry opposite charges. The polyelectrolyte microcapsules prepared with the preparation method has a high cladding rate and good embedding performance on hydrophobic matter.

The invention discloses a preparation method and application of a carbon sphere/Au (copper) nanometer composite material. The preparation method comprises the following steps of firstly, preparing a carbon sphere, modifying the surface of the carbon sphere by PDDA (poly diallyldimethylammonium chloride), enabling the surface of the carbon sphere to carry positive charges, and utilizing electrostatic attraction to uniformly and quickly adsorb AuC14<-> onto the surface of the carbon sphere in the heating and stirring process with an H2O and DMF mixed solvent; finally, under the protection action of PVP (polyvinylpyrrolidone), using N,N-DMF (N,N-dimethylformamide) as a reduction agent, enabling Au to grow along a particular crystal face, and further reducing in situ in one step, so as to obtain the uniformly loaded carbon sphere/Au nanometer composite material. Compared with the prior art, the preparation method has the advantages that a gold nanoparticle is loaded by using the green, low-price and easily-synthetic carbon sphere as a substrate, the reaction time is short, the operation is simple and convenient, and the repeatability is high; by changing the adding amount of HAuC14, the carbon sphere/Au nanometer composite material with controllable loading amount is obtained; the carbon sphere/Au nanometer composite material has catalyzing property, and especially has excellent catalyzing property on the reduction of 4-nitrophenol.

The invention discloses a depressurization enhancement agent for a water injection well and a preparing method thereof and belongs to oilfield chemistry agents.The depressurization enhancement agent is prepared from 15-25% of carboxylic acid high carbon alcohol ester-based trimethyl ammonium chloride, 1-10% of trimethylamine hydrochloride, 1-10% of poly diallyldimethylammonium chloride, 1-5% of polyoxyethylene, 1-2% of nitrilotriacetic acid trisodium salt, 5-10% of ethylene glycol monomethyl ether and water.According to the preparing method, water, carboxylic acid high carbon alcohol ester-based trimethyl ammonium chloride, ethylene glycol monomethyl ether and polyoxyethylene are evenly mixedly and heated to 45-60 DEG C, and stirring is conducted; then trimethylamine hydrochloride, poly diallyldimethylammonium chloride and nitrilotriacetic acid trisodium salt are added to the substance obtained in the last step, and stirring is conducted continuously to obtain the depressurization enhancement agent for the water injection well.When the adding amount is 0.5%(m/m), injection pressure can be reduced by 28% or more, injection rate can be increased by 40% or more, and the problems that injection pressure is high, injection is difficult, and the energy consumption of an injection system is high in the middle and later period of oilfield development for a low-permeability reservoir water injection well can be effectively solved.

The invention relates to a nano-silver electrically conductive printing ink and a preparation method thereof. The nano-silver electrically conductive printing ink is made of, by weight, 5-8 parts of poly-diallyldimethylammonium chloride, 1.5-3 parts of nano silver, 1-2 parts of isophorone diamine, 0.5-1.8 parts of polymethylhydrosiloxane, 0.5-0.8 part of nano auxiliaries, 0.02-0.4 part of 2,4-diamino-6-[2'-ethyl-4'-methylimidazole]ethyl cis triazine and 65-85 parts of solvent. The invention further provides a preparation method of the nano-silver electrically conductive printing ink.

The invention relates to a method for preparing monodispersing decahedral gold nano-particles in different sizes in ethylene glycol. The method has the advantages of being simple in operation, applicable to large-scale synthesis and the like; obtained decahedral gold nano-particles have the advantages of being high in yield, uniform in size, adjustable in dimension and the like. The method comprises the steps of (1) taking the ethylene glycol as solvent, poly diallyldimethylammonium chloride and silver nitrate as morphological regulator to obtain 30 decahedral gold nanoscale particle colloids through a polyol process; (2) adding the decahedral gold nanoscale particle colloids obtain in the step (1) into an ethylene glycol solution containing chloroauric acid and ascorbic acid, and regulating the experimental parameters such as precursor concentration, reaction time and reaction temperature to obtain the decahedral gold nano-particles uniform in size and different in dimension. The obtained decahedral gold nano-particles are good in stability and excellent in optical absorption properties and accordingly have high application values in aspects of plasma optical and medical detection and catalysis and the like.

A filter media having lignite-derived activated carbon, polyacrylic acid (PAA), a commercially available copper-zinc alloy, and polydiallyldimethylammonium chloride (PolyDADMAC) or Luviquat®, which is Poly[(3-methyl-1-vinylimidazolium chloride)-co-(1-vinylpyrrolidone)], combined and used as suitable replacement for TOG bituminous coal-based activated carbon, silver, and PolyDADMAC. Functional groups in lignite-based activated carbon interact with the polyacrylic acid. Functional groups such as calcium, iron, or aluminum oxide/hydroxide of lignite-based activated carbon interact with PAA, and help hold the PolyDADMAC in place. The additional presence of a copper-zinc alloy enhances the filter anti-microbiological performance.

The invention discloses a multistage nano golden flower, a preparation method and an application thereof. According to one embodiment, the preparation method comprises the steps of fully mixing chloroauric acid and poly diallyldimethylammonium chloride in an aqueous system, continuously stirring at room temperature until a prepared mixed solution is yellow, then adding ascorbic acid to the obtained yellow mixed solution, violently stirring, then adding a nano golden ball, quickly stirring, and then standing at room temperature. The preparation method has the advantages of simplicity, easiness in operation, good controllability and high productivity, a nano tip bulge is formed on the surface of the obtained multistage nano golden flower, and the multistage nano golden flower has a large specific surface area. The nano golden flower can be used as a gold-labelled antibody of an immunochromatographic strip, so as to be applied to the field of food safety, environment, medical diagnosis and the like, simple and high-sensitive analysis and detection can be performed on target objects, for example, high-sensitive detection of colibacillus can be performed, and the lower limit of the detection concentration reaches 103 CFU/mL.

The invention provides a flocculant for removing synedra from water. The flocculant is formed by matching alum and diallyldimethylammonium chloride, wherein the diallyldimethylammonium chloride belongs to a cationic polymer, and the best weight ratio of the alum to the diallyldimethylammonium chloride is 9 to 12:1. The invention further provides a method for removing the synedra from the water. The method comprises the following steps: removing the synedra from the water by utilizing the flocculant, wherein the concentration of the alum in the water is controlled to be 32 to 48mg/L, and the concentration of the diallyldimethylammonium chloride in the water is controlled to be 2.7 to 4.0mg/L; and then carrying out mixing, flocculation, sedimentation and filtration, thereby removing the synedra. The method has the advantages that the operation is simple, i.e. the only requirement is to proportion the flocculant accurately and then put the flocculant in a distribution well of a water plant; and all the used reagents and operation processes cannot generate secondary pollution and have no harm on environment and human bodies, so that the method is green, clean and environment-friendly. In addition, the removing efficiency of the synedra in the water is high and reaches 90% to 94%.

The invention relates to multi-effect whitening and freckle-removing essence cream. The multi-effect whitening and freckle-removing essence cream is prepared from raw materials in parts by weight as follows: 2-3 parts of konjac glucomannan, 1.5-2 parts of laminine, 20-25 parts of myristic acid isopropyl ester, 2-2.5 parts of poly diallyldimethylammonium chloride, 1-1.2 parts of ethyl maltol, 10-12 parts of horse oil, 15-18 parts of polydimethylsiloxane, 8-10 parts of walnut oil, 2-2.5 parts of epipactis mairei Schltr. extracts and 1-1.2 parts of snake sansevieria extracts. The multi-effect whitening and freckle-removing essence cream contains multiple nutrient elements, the nutrient elements are matched, and the multi-effect whitening and freckle-removing essence cream is prepared with a special process, has an outstanding synergistic effect and has excellent whitening and freckle removing effects; particularly, plant extraction ingredients such as epipactis mairei Schltr. extracts and snake sansevieria extracts are added, therefore, the multi-effect whitening and freckle-removing essence cream has very prominent efficacy in the aspect of whitening, especially in the aspect of freckle removing.

The invention belongs to the technical field of two-dimensional semiconductor film preparation, and particularly relates to a large-scale preparation and patterning method of a two-dimensional material semiconductor film. The method comprises the following steps of pre-treating a substrate; photoetching a target pattern on the pretreated substrate by using negative photoresist; preparing a two-dimensional semiconductor film on the substrate with a photoresist pattern by using a solution self-assembly technology, wherein the substrate is firstly soaked in a poly(diallyldimethylammonium chloride) aqueous solution and then soaked in a MoS2 aqueous solution, and the process can be repeated for many times; and soaking the film obtained on the substrate in acetone to remove the photoresist, andfinally, obtaining the target MoS2 pattern. The method has the advantages that the preparation method is simple and can be operated on any substrate; the thickness of the film is controllable, and thepatterning can be realized; reaction conditions are mild, and the method has wide application space in the field of high-performance two-dimensional semiconductor film electronic devices.

Compositions are disclosed for dewatering mixtures of petroleum and water. The compositions comprise one or more of the following: an unreacted polysaccharide component; and one or both of a polysaccharide component reacted with a hydrophilic component and a polysaccharide component reacted with a hydrophobic component. The compositions may also include viscosifying agents or stabilizers to stabilize the compositions against separation, for example, prior to use. In particularly preferred embodiments the invention is drawn to compositions for breaking an emulsion; such compositions comprising a carbohydrate component containing a cationic starch joined to a hydrophobic moiety, providing the carbohydrate component oil solubility. The composition may optionally comprise one or more additional demulsifier selected from, without limitation, salts (such as a polyaluminum chloride, an aluminum chlorohydrate, an alum, etc.), metal salts (such as iron and zinc salts), dithiocarbamate, tannin, and organic demulsifiers such as poly-DADMAC and similar compounds.

The invention relates to a gold@platinum octahedral nanoparticle with a core-shell structure and a preparation method of the gold@platinum octahedral nanoparticle. The gold@platinum shell-core octahedral nanoparticle is obtained by epitaxial equal-angle deposition and growing of platinum on a surface of the gold octahedral nanoparticle, wherein a core part constituent is gold, and a shell layer constituent is platinum. The preparation comprises the steps of (1) taking poly diallyldimethylammonium chloride as a stabilizer, and preparing an octahedral nanoparticle colloid solution in ethylene glycol by employing a polyalcohol reduction method; and (2) adding an appropriate amount of pentanedione platinum into the gold octahedral nanoparticle colloid solution obtained in the step (1) under a room temperature condition, performing heating reaction under 180-230 DEGC to obtain the brownish gold@platinum shell-core octahedral nanoparticle after uniform stirring. The gold@platinum octahedral shell-core nanoparticle obtained by the preparation method has many performances of catalysis and ultraviolet-visible surface plasma resonance absorption and has important application value in aspects of a low-temperature fuel cell, photochemical catalytic synthesis and the like.

A novel gypsum board having improved antifungal properties is disclosed. The board comprises a gypsum core, front and back paper facings, and a polymeric antifungal agent effective at inhibiting fungal growth. A preferred polymeric antifungal agent is polyDADMAC or polyTMMC. The novel gypsum board further comprises a non-polymeric antifungal agent comprising a fluorine-containing quaternary ammonium compound. Preferred non-polymeric ammonium compounds include Tetra-n-butylammonium fluoride and Tetraethylammonium fluoride. The polymeric antifungal agent can be present in the gypsum core and/or on one or both of the paper facings. The non-polymeric antifungal agent may be encapsulated in a material or ionically associated with the polymeric antifungal agent to allow releases of the non-polymeric antifungal agent over time and/or upon exposure to moisture. Methods for preparing the aforementioned novel gypsum board are also disclosed.

The invention discloses an MXene quantum dot sensitized poly (diallyldimethylammonium chloride) modified indium zinc sulfide photocatalyst as well as preparation and application thereof, a PDDA surface modified ZnIn2S4 nanosheet (ZnIn2S4/PDDA) has a positive charge surface, and the surfaces of MQDs have negative charges to trigger electrostatic self-assembly, so that a ZnIn2S4/PDDA/MQDs heterostructure photocatalyst with a unidirectional cascade charge transmission chain is constructed. According to the invention, p-nitroaniline is reduced and substituted under the excitation of visible light, and the catalyst has high catalytic efficiency. The composite photocatalytic material has wide practical value and application prospect in the technical field of preparation of heterojunction photocatalytic materials and the field of organic conversion.