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

The application discloses a graphene dispersion liquid and a preparation method thereof, relates to the field of graphene dispersion liquid and a preparation method thereof, and aims at solving the technical problem that it is difficult to obtain a high-concentration stable graphene dispersion liquid at present. In the dispersion liquid, graphene is obtained by reduction of graphene oxide prepared by a Hummers method, and then is uniformly dispersed into N-methyl pyrrolidone under the assistance of dispersants of sodium polystyrene sulfonate and polydiallyldimethylammonium chloride. The application is used for preparing the graphene dispersion liquid.

The application discloses an electronic skin-oriented conductive silver paste and a preparation method and application thereof, and relates to the technical field of flexible printed electronic materials.The raw materials of the electronic skin-oriented conductive silver paste include flaky silver powder, silver nanoparticles, thermoplastic polyurethane elastomer, acrylic elastomer, PEDOT:PSS microgel dispersion, (3-glycidylpropoxy)trimethoxysilane, polydiallyldimethylammonium chloride, hexanedial modified dopamine copolymer, (3-aminopropyl)triethoxysilane, methacryloyloxypropyltrimethoxysilane, cellulose acetate, modified polyurea thixotropic agent, hydrogenated castor oil, ethylene glycol ether acetate, dibasic acid ester, leveling agent and water.The electronic skin-oriented conductive silver paste has the advantages of good electrical performance, good mechanical-electrical stability, good anti-electromigration and sweat corrosion resistance, and can still maintain dendrite-free and low drift under long-term coupling of sweat and bias, and is suitable for electronic skin.

The invention discloses a Y-type molecular sieve and a preparation method thereof, a catalyst and a preparation method thereof, and a Fischer-Tropsch wax hydrocracking method, and belongs to the technical field of chemical engineering. The method comprises the following steps: S1, mixing a first alkali source, a first aluminum source, a first silicon source, first water and a template agent to obtain a first mixed solution, and pre-crystallizing to obtain a seed crystal guiding agent; the pre-crystallization temperature is 15-35 DEG C, the pre-crystallization time is 24-60 hours, and the template agent is poly (diallyldimethylammonium chloride); s2, mixing a second alkali source, a second aluminum source, a second silicon source and second water to obtain mother liquor; mixing the guiding agent and the mother liquor to obtain initial gel; crystallizing the initial gel to obtain an alkali metal Y-type molecular sieve; and S3, mixing the alkali metal Y-type molecular sieve with an ammonium-containing solution, carrying out ammonium ion exchange treatment to obtain a first Y-type molecular sieve, and carrying out first roasting treatment to obtain a second Y-type molecular sieve. The particle size of the molecular sieve is smaller than 520 nm, and the silica-alumina ratio is larger than 6.5.

The invention discloses a PDDA (poly (diallyldimethylammonium chloride)) / NiFe-LDH (layered double hydroxides) composite material as well as a preparation method and algae removal application thereof, PDDA (poly (diallyldimethylammonium chloride)) and NiFe-LDH are effectively combined, and the PDDA / NiFe-LDH composite material with synergistically enhanced functions is constructed through accurate proportion regulation and control; under the condition of the same dosage, compared with pure LDH, PDDA and various common traditional coagulants, the composite material has more excellent algae removal efficiency; the prepared composite material has good environmental adaptability, and can stably remove microcystis aeruginosa cells and extracellular organic matters thereof in a wide pH value range under the conditions of different initial algae densities and the like; the PDDA / NiFe-LDH composite material is used for water algae bloom treatment, the dosage ratio can be effectively reduced, the operation cost is reduced, meanwhile, the risk of secondary pollution to the water is reduced, and high efficiency and economical and environment-friendly properties are achieved.

The application belongs to the field of nanometer material in environmental monitoring application, and discloses a fluorescence immunoassay method for detecting ovalbumin concentration based on carbon quantum dots, which comprises the following steps: using L-glutamic acid as a precursor, one-step preparation of carbon quantum dots with amino groups by ultrasonic hydrothermal method; using a reduced graphene oxide method to prepare graphene sheets, and optimizing the graphene by modifying polydiallyldimethylammonium chloride to obtain graphene sheets which can have good fluorescence resonance energy transfer with the carbon quantum dots with amino groups; and coupling the prepared carbon quantum dots with amino groups with a monoclonal antibody. The application directly prepares carbon quantum dots with amino groups by one-step hydrothermal method, and the quantum dots can be directly coupled with a monoclonal antibody. The carbon quantum dots involved in the application avoid the aminoization step, and the linear range can reach 0.1 ng / mL-3000 ng / mL.

The invention discloses a sizing-free dyeing method, colored yarn and colored fabric, and belongs to the field of textile, the method comprises the following steps: cutting colored waste silk fabric into fragments, dissolving the fragments with a dissolving solution containing calcium chloride and ethanol, intercepting silk fibroin molecules, adding a penetrant and poly (diallyldimethylammonium chloride), adjusting the mixture to be alkaline with sodium carbonate, and drying to obtain the sizing-free waste silk fabric. The pure cotton yarn is subjected to padding dyeing, the dyed pure cotton yarn is neutralized, and then the pure cotton yarn is cleaned and dried. According to the method, the dye on the colored waste silk can be used for dyeing the pure cotton yarn, meanwhile, silk fibroin is matched with poly (diallyldimethylammonium chloride) so that fiber hairiness of the pure cotton yarn can be attached, additional sizing is not needed, and the dye is promoted to be adsorbed to the pure cotton yarn; the silk fibroin brings smooth and soft touch feeling similar to that of silk to the pure cotton yarn to a certain extent, so that the fabric woven by the yarn has the characteristics of softness and comfort without desizing treatment.

The application discloses a preparation method of a sheet structure cyanuric acid / melamine composite. The method comprises the following steps: adding an inhibitor, cyanuric acid and melamine in water, reacting at a temperature of 90-98 DEG C for 2-4 hours, and then filtering, washing and drying to obtain the sheet structure cyanuric acid / melamine composite, wherein the molar ratio of the cyanuric acid and the melamine is (0.95-1.05):1, and the mass ratio of the total amount of the cyanuric acid and the melamine, the inhibitor and water is 1:(0.005-0.007):(2-5), and the inhibitor is a sodium naphthalene sulfonate formaldehyde polycondensate, a polydiallyldimethylammonium chloride and a melamine polyphosphate with a mass ratio of 3:(1-2):(1-2). The method can prepare the sheet structure cyanuric acid / melamine composite, the particle size of which reaches the nanometer level, the dispersibility is good, and the flame retardancy is good.

This invention discloses a method for preparing a manganese dioxide / MXene-like paper electrode suitable for flexible aqueous zinc-ion batteries. Potassium permanganate and ammonium chloride are dissolved in water to obtain a precursor solution, which is then heated to obtain one-dimensional (1D) manganese dioxide nanowires. The 1D manganese dioxide nanowires are immersed in a polydiallyldimethylammonium chloride (PDDA) solution and subjected to ultrasonic treatment. A two-dimensional (2D) MXene dispersion is then added and vigorously stirred to obtain a manganese dioxide / MXene heterojunction electrode material. The manganese dioxide / MXene suspension is then vacuum filtered to obtain a lightweight manganese dioxide / MXene-like paper electrode.

The application aims to provide an organic cation-mediated iron-doped molybdenum disulfide nanosheet self-assembly method and application thereof, and belongs to the technical field of analysis and detection. The method uses polydiallyldimethylammonium chloride as intercalation ions, polyvinylpyrrolidone as stabilizer, and both of them cooperatively control the self-assembly of iron-doped molybdenum disulfide nanosheet. First, the iron-doped molybdenum disulfide nanosheet is prepared by using a hydrothermal synthesis method; then, the PDDA is used as intercalation agent, the PVP is used as stabilizer, and the homogeneous dispersed Fe-MoS2 nanosheet is obtained. Finally, the three-phase liquid-liquid self-assembly method is combined to realize the large-area and single-layer self-assembly of the Fe-MoS2 nanosheet. The method provides a new way for the macroscopic controllable assembly of two-dimensional materials, and combined with the noble metal SERS substrate, the rapid identification and detection of drug molecules can be realized.

The invention relates to the technical field of label paper, in particular to high-viscosity self-adhesive label paper and a preparation method thereof. The adhesive layer of the label paper is constructed by the following steps: performing sodium chloroacetate carboxymethylation and itaconic acid aza-Michael addition dual modification on branched polyethyleneimine, grafting dopamine to introduce a catechol functional group and form a coordination node with ferric iron, and compounding with a polyvinyl alcohol-borate dynamic reversible network to obtain the label paper. And finally, carrying out electrostatic compounding with poly (diallyldimethylammonium chloride) at an isoelectric point. According to the design, the adhesive layer has high peel strength and aging resistance in a dry state, can be quickly softened after meeting water and can be completely removed in an interface debonding manner, so that the residual adhesive rate and the substrate damage risk are remarkably reduced, and the problem that high adhesion and removability are difficult to consider at the same time is solved.

The application discloses a method and system for strengthening and modifying activated carbon adsorption of perfluorinated compounds by micro-bubbles, belonging to the technical field of water treatment. The application is to immerse activated carbon in a polydiallyldimethylammonium chloride aqueous solution, treat the immersed activated carbon to be neutral and dry to obtain modified activated carbon; raw water containing PFAS is treated by micro-bubbles, and then the modified activated carbon is added to the raw water for reaction, and the treated water is discharged from the upper layer. The application compensates for the insufficient adsorption of short-chain PFAS by traditional activated carbon through PDADMAC electrostatic adsorption, improves the removal effect by combining the enrichment effect of micro-bubbles; the mass transfer is strengthened by slight disturbance, the adsorption kinetics is accelerated, and the interference of natural organic matter can be resisted to protect the adsorption sites; the process condition is mild and safe, there is no secondary pollution, and the engineering popularization is convenient.

The invention discloses an intelligent response type marine antirust agent composition as well as a preparation method and application thereof. The intelligent response type marine antirust agent composition comprises a solvent and the following components in parts by mass: 6-8 parts of ion response microcapsules, 6-8 parts of photo-thermal response microcapsules, 6-9 parts of benzotriazole covalent grafting modified functionalized graphene oxide and 34-38 parts of film-forming resin, a capsule core of the ion response microcapsule is a corrosion inhibitor; the capsule wall is a polyelectrolyte composite membrane formed by self-assembling cationic polyelectrolyte and anionic polyelectrolyte layer by layer, and the outer surface of the capsule wall further comprises an inorganic nanoparticle layer formed by biomimetic mineralization; the cationic polyelectrolyte is poly (diallyldimethylammonium chloride), the anionic polyelectrolyte is sodium polystyrenesulfonate, and the inorganic nanoparticles are calcium carbonate; the photo-thermal response microcapsule comprises a capsule core which is a mixture of CsPbBr and n-octacosane, and a capsule wall which is polyurea formaldehyde.

This invention discloses a high-efficiency salt-removing, superhydrophilic carbonized wood-based solar evaporator, its preparation, and its application. The evaporator comprises an evaporator body and a heat insulation layer. The evaporator body is made of wood-based material. The wood-based material undergoes sequential treatments including lignin removal, high-temperature carbonization, superhydrophilic modification, and soaking in polydiallyldimethylammonium chloride and sodium polystyrene sulfonate to obtain a highly efficient salt-removing, superhydrophilic carbonized porous wood sponge. The heat insulation layer is tightly attached to the lower end face of the evaporator and is externally wrapped with a water-absorbing material. This invention improves solar energy utilization and reduces salt deposition on the evaporator surface by altering its structure and surface properties, resulting in an evaporator with a higher evaporation rate.

The invention provides an oil-resistant and organic-solvent-resistant rubber material which takes vulcanized rubber as a matrix, and a first modified layer and a second modified layer are sequentially deposited on the surface of the matrix, the first modified layer comprises a plurality of alternate poly (diallyldimethylammonium chloride) layers and polystyrene sulfonic acid layers; the second modified layer is a polyvinyl alcohol layer. The oil-resistant and organic-solvent-resistant rubber material provided by the invention can keep the original structure after being soaked in methylbenzene for 15 hours, the volume change rate is only 2.3%, and swelling does not occur; the product does not expand or dissolve after being soaked in four oil agents for 7 days, and the surface of the product is kept flat and smooth. Meanwhile, by testing the tensile strength of a sample before and after the oil-resistant and organic-solvent-resistant rubber material is soaked in an organic solvent and an oiling agent, it is found that the oil-resistant and organic-solvent-resistant rubber material can still keep the tensile strength before modification.

The invention discloses conductive silver paste for electronic skin as well as a preparation method and application of the conductive silver paste, and relates to the technical field of flexible printing electronic materials. The conductive silver paste for the electronic skin comprises the following raw materials: flake silver powder, silver nanoparticles, a thermoplastic polyurethane elastomer, an acrylic elastomer, a PEDOT: PSS microgel dispersion, (3-glycidyl propoxy) trimethoxysilane, poly (diallyldimethylammonium chloride), an adipic dialdehyde modified dopamine copolymer, (3-aminopropyl) triethoxysilane, a crosslinking agent, a coupling agent and a solvent. The coating is prepared from methyl acryloyloxy propyl trimethoxy silane, cellulose acetate, a modified polyurea thixotropic agent, hydrogenated castor oil, ethylene glycol monoethyl ether acetate, dibasic acid ester, a flatting agent and water. The conductive silver paste for the electronic skin has the advantages of being good in electrical property, mechanical-electrical stability, electromigration resistance and sweat corrosion resistance, can still keep no dendrite and low drift under long-term coupling of sweat and bias voltage, and is suitable for the electronic skin.

The application discloses a preparation method of a lithium-sulfur battery diaphragm and belongs to the technical field of battery diaphragms. First, a quaternary ammonium polymer PDDANO3 containing nitrate is prepared by reacting a nitrate and polydiallyldimethylammonium chloride PDDA. Then, the PDDANO3 is dissolved in water to form a solution, which is coated on one side or both sides of the diaphragm, and a functional diaphragm for a lithium-sulfur battery is obtained after drying. The quaternary ammonium polymer PDDANO3 containing nitrate obtained by the method can play the roles of inhibiting the polysulfide ion shuttle effect and lithium negative electrode dendrite growth in the lithium-sulfur battery, so that the specific capacity and cycle stability of the lithium-sulfur battery are significantly improved.

The invention discloses a mushroom-imitating 3D printing water phase change micro-nano generator, and belongs to a new energy technology. The generator comprises a bionic mycorrhiza, a bottom electrode, a bionic stipe, a bionic pileus and a top electrode embedded in the bionic pileus which are arranged from bottom to top in sequence. The bionic mycorrhiza is prepared by thickening polyvinyl alcohol and methyl cellulose through chitosan, performing 3D printing and performing freeze-thaw cycle gelation, and the structure of the bionic mycorrhiza simulates a natural plant root crown; the bionic stipes and pilei are compounded by polystyrolsulfon acid / carbon nanotubes and poly (diallyldimethylammonium chloride) / carbon nanotubes and polyvinyl alcohol respectively, and the shapes of the bionic stipes and pilei imitate the structures of the stipes and pilei of natural mushrooms respectively. According to the generator, hydrogen ions and chloride ions are dissociated from the polyelectrolyte material through the absorption, transportation and evaporation processes of water, and a continuous potential difference is formed under the coupling action of the asymmetric electrode pair, so that effective output of direct-current electric energy is realized, and the generator can be stably applied to collection and conversion of tiny energy in a natural environment.

The present application relates to the technical field of epoxy resin composite board, in particular to a preparation method of an automobile epoxy resin composite board containing basalt fiber: including the following raw materials by weight: epoxy resin 50-80 parts, curing agent 4-8 parts, reinforcing material 3-6 parts, flame retardant 1-3 parts, color agent 0.2-0.4 parts.In the present application, the surface of basalt flake is bridged by polydiallyldimethylammonium chloride, and graphene microsheets and hexagonal boron nitride nanosheets are firmly loaded, which can consume a large amount of fracture energy, and the carbon nanotubes modified by polydopamine have high aspect ratio and excellent interfacial bonding force, and are connected between different reinforcing bodies, further transmitting stress and preventing crack coalescence and expansion, so that the composite board can effectively disperse and absorb energy when impacted and stretched, thereby simultaneously achieving significant improvement in high strength, high modulus and high toughness.

The application discloses a preparation method of macrophage membrane coated artificial cells and belongs to the technical field of artificial cell preparation. Polydiallyldimethylammonium chloride and sulfobutyl-beta-cyclodextrin are dissolved in ultrapure water, and the aqueous solutions of the two are mixed to obtain a PDDA / SBE-beta-CD condensate droplet solution; equal-mass-ratio macrophage membrane suspension liquid and the PDDA / SBE-beta-CD condensate droplet solution are mixed in equal ratio, in-situ coating of the macrophage membrane is realized by using ultrasonic coating technology, and macrophage membrane coated artificial cells are obtained. The PDDA / SBE-beta-CD condensate droplet constructed by the application has good stability under physiological salt concentration, pH conditions and 37 DEG C; the macrophage membrane coated artificial cells are prepared by mixing the macrophage membrane suspension liquid, and the macrophage membrane as the shell can not only prevent the condensate from gathering, but also increase the structural stability and biocompatibility.

The invention provides a plugging agent and a preparation method thereof. The invention provides a plugging agent. The plugging agent comprises modified resin and a composite film wrapping the modified resin, the composite membrane is prepared from poly (diallyldimethylammonium chloride), polyacrylic acid and graphene oxide. The invention provides a preparation method of a blocking agent. The preparation method comprises the following steps: (1) sequentially immersing modified resin into a PDDA solution and a PAA solution; and (2) taking out, sequentially immersing into a PDDA solution, a GO particle dispersion liquid, a PAA solution and a GO particle dispersion liquid, repeating for 30-200 times to obtain modified resin coated with a composite membrane material, and curing, drying and crushing the modified resin coated with the composite membrane material to obtain the plugging agent. The plugging agent prepared by wrapping the modified resin with the composite film material deforms in a temperature window, so that the interior of the crack is plugged, and the plugging effect is improved.

The invention discloses a low-odor environment-friendly functional textile fiber and a surface modification method thereof. The method comprises the following steps: by taking polyethylene glycol terephthalate fibers as a base material, sequentially carrying out washing and alkali treatment by using a nonionic surfactant, forming an intermediate layer by self-polymerization of dopamine, initiating group fixation, and initiating two-stage polymerization on the surface of a water phase to construct a gradient-distributed zwitterionic polymer brush layer; and carrying out poly (diallyldimethylammonium chloride) treatment and salt solution stabilization treatment to obtain the functional fiber with a stable surface structure. The modification method is completed under a water phase condition, the process is mild, release of peculiar smell substances in the fibers can be effectively reduced, and the fibers are endowed with good hydrophilicity, low adsorptivity and washing resistance. The obtained fiber shows a relatively low peculiar smell release level, a relatively stable surface state and good environmental adaptability under the conditions of use and repeated washing.

This invention discloses a magnetic H-Fe3O4@SiO2@ZIFs composite adsorbent with a hierarchical porous structure, its preparation method, and its application. The magnetic material H-Fe3O4@SiO2@ZIFs is synthesized using a solvothermal and room-temperature aqueous phase method. The method first uses a solvothermal reaction to ultrasonically mix trivalent iron, sodium salt, and an alcohol solvent to prepare magnetic Fe3O4 nanospheres. Then, the surface of the Fe3O4 nanospheres is functionalized to obtain core-shell Fe3O4@SiO2 nanoparticles. Finally, Fe3O4@SiO2 is added to a mixture of zinc acetate dihydrate, dimethylimidazolium, and polydiallyldimethylammonium chloride to react and obtain the hierarchical porous magnetic composite adsorbent. This invention features a simple operation process, high operability, and ease of large-scale production. It possesses advantages such as Lewis acidic sites, large specific surface area, hierarchical porous structure, and easy recovery. It can efficiently adsorb drugs such as tetracycline hydrochloride and diclofenac sodium, exhibiting high adsorption capacity and excellent adsorption performance, and has broad application prospects in pharmaceutical wastewater treatment.

The purpose of the present invention is to provide an anti-acanthamoeba liquid which has an anti-acanthamoeba effect, has little impact on ocular tissue, is safe, and has versatility that can be applied to most contact lenses. The purpose is achieved by a solution for resisting acanthamoeba, which comprises a sodium dihydrogen phosphate dihydrate, a basic isoosmotic adjusting agent, and polydiallyldimethylammonium chloride having an average molecular weight of 10,000 to 1100,000, and the like.

The invention belongs to the technical field of electrochemical energy storage, and particularly relates to a preparation method and application of an ion-electron coupled high-activity graphite felt electrode. The preparation method comprises the following steps: taking PDDA (poly (diallyldimethylammonium chloride)) containing nitrogen positive ions as an ion active component and a binder, and tightly attaching CNTs (carbon nanotubes) as an electronic active component to the surface of graphite felt fibers, so as to obtain the ion-electron coupled high-activity graphite felt electrode PDDA-CNTs-GF. The PDDA-CNTs can obviously increase the electrochemical active area and the electrocatalytic activity of the graphite felt. When the PDDA-CNTs-GF is applied to the viologen-based aqueous organic flow battery, the electrode reaction kinetics can be effectively improved, and the battery performance is improved. The method disclosed by the invention is simple, low in cost, suitable for large-scale production and beneficial to promoting the development of a novel energy storage system, and has a wide application prospect.

This invention provides a flexible self-rectifying memory, its fabrication method, and its application. In this flexible self-rectifying memory, a polydiallyldimethylammonium chloride buffer switch layer serves as the active switching medium, and its quaternary ammonium salt functional groups provide oxygen ion adsorption sites, promoting oxygen ion aggregation and movement; Ti3C2T x The charge-trapping layer achieves efficient charge trapping through large interlayer spacing and a nanoporous structure. The flexible self-rectifying memory of this invention exhibits tunable self-rectification characteristics and significant crosstalk suppression. The fabrication process of this invention is simple and inexpensive. The advantages of combining the polymer and inorganic layers are not only reflected in the preservation of material flexibility but also in innovative high-performance features such as adjustable self-rectification. The flexible self-rectifying memory of this invention demonstrates great application potential in high-density and ultra-large-scale parallel memory arrays struggling with creeping currents and in learning through neural synaptic plasticity.

The application discloses an environment-friendly energy-saving high-calorific-value biomass fuel, which is prepared by adding guaiacol polyether potassium phosphate and polydiallyldimethylammonium chloride to improve the performance of a biomass hydrothermal carbonization catalyst, and further improve the calorific value of the biomass fuel; the urea-formaldehyde resin binder is modified to enhance the bonding performance of the urea-formaldehyde resin and the water resistance of the biomass fuel, and meanwhile, the shrinkage rate of the urea-formaldehyde resin is reduced; and finally, the active white clay is modified and coated with peroxycalcium carbonate to further reduce the slagging rate of the biomass fuel.

The invention provides a method for purifying recombinant human chorionic gonadotropin (rhCG), and particularly relates to a method for realizing high-quality purification of the recombinant human chorionic gonadotropin (rhCG) by pretreating cell sap through a flocculating agent poly (diallyldimethylammonium chloride) (pDADMAC) and matching with dye affinity chromatography and cation exchange chromatography. The yield of the rhCG prepared by the purification method is more than 98%, the purity reaches 99.9%, the purified liquid hardly contains dissociation subunits, and the content of process impurities is low.