206 results about "Polyelectrolyte" patented technology

The present invention relates to a humidity sensor, and more particularly, to a resistance film-type real-time chromogenic humidity sensor produced with a polyelectrolyte thin film. The humidity sensor according to the present invention is a chromogenic hygrometer in which a polyelectrolyte nano thin film that absorbs moisture is formed on a reflective layer, and the nano thin film varies terms of color and electrical resistance as moisture is absorbed and the thickness varies. The hygrometer according to the present invention is a dual-function hygrometer, the color and resistance of which vary. Provided is the chromogenic hygrometer in which the sensor made using a PSS-b-PMB thin film varies in color between purple, blue, green, yellow, orange, and red according to humidity at a very high response speed of within one minute.

The invention belongs to the technical field of thermoelectricity, and relates to a preparation method and application of a quasi-solid thermoelectric material capable of realizing humidity stability by means of phase separation regulation, the preparation method comprises the following steps: dissolving a negatively charged hydrophilic monomer, an electrically neutral monomer, a cross-linking agent and a photoinitiator in a solvent to obtain a precursor solution, and carrying out an ultraviolet polymerization reaction to form polyelectrolyte gel; mixing the eutectic solvent with an electrolyte aqueous solution containing redox ion pairs and lithium chloride to obtain a quaternary electrolyte system; and immersing the gel into a quaternary electrolyte system, and fully replacing the internal solution through a diffusion effect to obtain the quasi-solid thermoelectric material with stable humidity. The thermoelectric material has the advantages of excellent Seebeck coefficient, good stability, high mechanical strength, large power density and the like, can supply power to wearable electronic products in an actual humidity fluctuation environment, breaks through the main bottleneck of actual application of quasi-solid ionic thermoelectric materials based on ionized water gel, and is wide in application prospect.

The invention relates to an efficient compound emulsifier based on hydrophilic polyelectrolyte, and belongs to the field of colloid and interface chemistry. The composite emulsifier is composed of a hydrophilic polyelectrolyte and an ionic surfactant, and the hydrophilic polyelectrolyte and the ionic surfactant have the same charges in a water phase. The compound emulsifier is an efficient O / W type emulsifier. Wherein the effective concentration of the polyelectrolyte can be as low as 0.001 wt.% of the mass fraction of the polyelectrolyte in a water phase, and the effective concentration of the ionic surfactant can be as low as 0.01 times of the critical micelle concentration (cmc) of the ionic surfactant. The composite emulsifier has good biocompatibility and can be safely used in the fields of food, medicine, cosmetics and the like. The efficient compound emulsifier can greatly reduce the use amount and emission of the surfactant, and has extremely high economic benefits and environmental benefits.

A polyelectrolyte-surfactant complex, a method of removing a toxic substance from contaminated soil or contaminated groundwater using a polyelectrolyte-surfactant complex and a method of making a polyelectrolyte-surfactant complex. The polyelectrolyte-surfactant complex is made from a complexated recombinant intrinsically disordered protein that has been electrostatically conjugated to an anionic surfactant to provide enhanced liquid-liquid phase separation properties.

The invention relates to the technical field of electrochemical energy storage materials, and discloses a gel polyelectrolyte, a preparation method and application and an aqueous zinc metal battery. The electrolyte is of a micron-sized micropore three-dimensional internet porous structure, and the three-dimensional internet porous structure is formed by copolymerization of polymer monomers; the polymer monomers are acrylamide and zinc 2-acrylamide-2-methylpropanesulfonate, the acrylamide provides a hydrophilic amide group, the hydrophilic amide group and a sulfonate group in the zinc 2-acrylamide-2-methylpropanesulfonate form a dynamic hydrogen bond network, the sulfonate group is covalently anchored to a polymer main chain, and the polymer main chain is covalently anchored to form a dynamic hydrogen bond network. And a main carrier Zn < + > is coordinated with-O-and-N-atoms on a polymer chain. According to the invention, salt-free single ion conduction is realized, concentration polarization is inhibited by sulfonate covalent anchoring, a dynamic hydrogen bond network provides excellent water-retaining property, the problem of moisture evaporation of traditional gel is solved, the interface stability is enhanced by coordination of Zn < + > and a polymer chain, the dendritic crystal inhibition effect is remarkable, and the ion transference number is far greater than that of traditional double-ion electrolyte.

The invention is applicable to the technical field of new energy materials and water treatment, and provides solar-driven multifunctional composite hydrogel and a preparation method and application thereof, the multifunctional composite hydrogel comprises dual-network hydrogel, a nanofiber skeleton and functional particles; the double-network hydrogel is formed by interpenetrating and cross-linking a polyelectrolyte hydrogel and a temperature-sensitive hydrogel; the functional particles are loaded in a three-dimensional porous network structure formed by the double-network hydrogel and the nanofiber skeleton. When the device floats on the surface of a water body, efficient solar interface evaporation water production, stable power generation based on the water photovoltaic effect and efficient adsorption removal of nitrogen and phosphorus nutritive salt in the water body can be synchronously achieved under illumination, and therefore algae growth is inhibited. According to the invention, the integrated collaborative management of water collection, energy conversion and ecological restoration is realized, the preparation process is simple, the environmental adaptability is high, and an innovative scheme is provided for solving the distributed water-energy supply and ecological environment problems in coastal, island and other regions.

A polyelectrolyte hydrogel coating with strong substrate binding performance and a method of manufacturing the same are provided. The method includes: 1) activating a substrate by applying oxygen plasma; and 2) dissolving a polycationic polymer, a polymeric monomer, a silane coupling agent and an initiator to obtain a precursor solution, vacuumizing the precursor solution to remove air bubbles, applying the vacuumized precursor solution to a surface of the substrate activated by the oxygen plasma, and performing an in-situ polymerization and curing process under nitrogen or rare gas atmosphere. The polymeric monomer includes at least one of: acrylamide, acrylic acid, hydroxyethyl methacrylamide, 2-acrylamido-2-methyl-1-propanesulfonic acid, polyethylene glycol (diol) diacrylate, 2-methacryloxyethylphosphocholine, 3-[[2-(Methacryloyloxy)ethyl]dimethylammonio]propane-1-sulfonate, and 3-[[2-(methacryloyloxy)ethyl]dimethylammonium] propionate. The silane coupling agent has a carbon-carbon double bond functional group.

The invention relates to the technical field of anion exchange membrane fuel cells, in particular to a cation remote grafting type polycarbazole anion exchange membrane and a preparation method thereof. The membrane is prepared by the following steps: condensing N-(4-bromobutyl) carbazole, N-alkyl carbazole and 2, 3-butanedione to obtain a polymer skeleton, then carrying out Menshutkin reaction on the polymer skeleton and cations to obtain polyelectrolyte, and finally carrying out ion exchange on the polyelectrolyte and sodium hydroxide. Wherein the main chain of the polymer has no unstable ether bond, so that the membrane has strong alkali resistance. The flexible overhanging side chain improves dimensional stability and increases polarity differences. Cations are grafted away from a framework, the alkali resistance of the membrane is improved, the service life is prolonged, hydrophilic / hydrophobic microphase separation is enhanced, an ion transmission channel is formed, and the ion conductivity is high. The membrane has good mechanical strength and flexibility, the tensile strength reaches 55.34 MPa, the elongation at break reaches 22.49%, the application requirements of fuel cells are met, and the membrane has excellent thermal stability and wide application prospects in alkaline anion exchange membrane fuel cells.

The invention discloses multicolor optical anti-counterfeiting alumite and a production process thereof. The alumite sequentially comprises a magnetic-sensitive enhanced substrate layer, a dynamic separation layer, a temperature-magnetic composite nanofiber multicolor layer, a polyelectrolyte alternate deposition barrier layer and a gradient magnetic-sensitive aluminized layer from bottom to top, wherein the magnetic-sensitive enhanced substrate layer, the dynamic separation layer, the temperature-magnetic composite nanofiber multicolor layer, the polyelectrolyte alternate deposition barrier layer and the gradient magnetic-sensitive aluminized layer are arranged on the alumite; wherein the magnetic-sensitive enhanced substrate layer comprises a graphene modified PET supporting layer and a three-dimensional net-shaped micro-channel embedded with Fe3O4 particles, the dynamic separation layer is temperature-sensitive phase change fluororesin, the temperature-magnetic composite nanofiber colorful layer is electrostatic spinning nanofibers of a core-sheath structure, and the blocking layer is of a polyelectrolyte alternate deposition structure and is embedded with infrared invisible identification particles. According to the invention, four anti-counterfeiting functions of multicolor optical response, magnetic response activation and infrared invisible two-dimensional codes are integrated, the advantages of high multicolor optical contrast, fast response, multiple reuse times, excellent barrier performance, stable transfer printing and the like are achieved, the method is suitable for scenes of high-end tobacco and wine, luxury packaging, high-added-value labels and the like, and the anti-counterfeiting grade and the practicability are obviously improved.

An improved Battery Electric Vehicle heat transfer fluids is made diluting a heat transfer fluid concentrate comprising greater than or equal to 85 weight percent of a freezing point depressant; 20 to 80 ppm of calcium ions; an azole compound; 100 to 250 ppm of an inorganic phosphate; and a polyelectrolyte polymer dispersant, wherein the heat transfer fluid concentrate has a pH of 7 to 9.0 and the weight ratio of polyelectrolyte polymer dispersant to calcium ions is 1 to 3 and the weight ratio of inorganic phosphate to calcium is 2 to 4. For use this concentrate is preferably diluted with deionized water usually 50 / 50. The addition of N-methyl-imidazole provides protection against vapor phase corrosion particularly for ferrous metals.

This invention discloses an amphoteric petroleum drilling additive and its preparation method. First, furfuryl acrylate, alkenyl sulfonic acid, alkenyl acid, acrylamide, and methacryloyloxyethyltrimethylammonium chloride are polymerized to obtain an amphoteric copolymer. Then, a bismaleimide derivative is added to crosslink with the furan rings on the polymer side chains to obtain the amphoteric polymer. The amphoteric polymer obtained by this invention simultaneously exhibits unique temperature-responsive rheological properties and an anti-polyelectrolyte effect. At low temperatures, it is beneficial for cutter carryover and wellbore purification; at high temperatures, the crosslinked network dissociates, the molecular chains extend, enhancing inhibition and plugging capabilities, and possessing reversible plugging ability, reducing the difficulty of subsequent drilling and unblocking.

A method for recovering nutrients from wet animal manure, the method comprising adding acid to wet manure (1) to lower the pH value of the wet manure to provide acidified wet manure; adding a polyelectrolyte to the acidified wet manure to obtain granulated wet acidified manure (5b); conveying the granulated wet acidified manure continuously into a liquid-solids separator (6) to separate a liquid manure fraction (16) and a solid manure fraction (7); providing a water purification apparatus (9) comprising an electrolytic cell (21), and a substantially vertical separator tower (20) arranged in a flow connection with the upper part of the electrolytic cell (21), conveying the liquid manure fraction to the electrolytic cell (21), operating the electrolytic cell (21) to produce an accumulating floc; conveying the raising floc into the separator tower (20), wherein the floc (19) is separated by expelling from the top of the separator tower (15), and conveying the solid manure fraction (7) and the floc (19) to an aerated bio-oxidizer device (8) to provide oxidized manure; discharging the oxidized manure (10) from the bio-oxidizer device. A system for recovering nutrients from wet animal manure. A fertilizer product (12) comprising nitrogen, phosphorus and potassium encapsulated in spores of Thermoactinomyces. Use of Thermoactinomyces for producing organic fertilizer. Use of a water purification apparatus for treating wet animal manure. Use of a continuously operating aerated bio-oxidizer device.

The invention discloses a special membrane material for targeted trapping of macrobrachium larvae in water and a preparation method of the special membrane material, and belongs to the field of water environment biological pollution prevention and control. The membrane material is of a multi-layer composite structure and comprises a nanofiber membrane base material layer, an interface adhesion layer and a functional modification layer. The interface adhesion layer is bionic coacervate gel formed by curing hydrophobic polyelectrolyte and phytic acid; the functional modification layer is covalently grafted with a bionic adhesion protein active peptide fragment and a macrobrachium larva chemical pheromone. The material actively attracts larvae to approach through chemical pheromones, high-strength adhesion capture is achieved through bionic peptide fragments rich in aromatic and cationic amino acids, and trapping is integrated. The preparation method comprises the steps of electrostatic spinning of a base material, surface activation, gel coating, functional modification and the like. The material disclosed by the invention has high selectivity and high capture rate on the larvae of the Limnoperna fortunei, is environment-friendly, long-acting and stable, and is suitable for green prevention and treatment of fouling of the larvae of the Limnoperna fortunei in facilities such as water pipelines and pump stations.

The invention relates to the technical field of catalyst carriers, and discloses porous high-hydrothermal-stability spherical aluminum oxide as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) firstly, mixing an aluminum source, water and acid to obtain pseudo sol, and then adding cationic macromolecular polyelectrolyte, a hard template agent and a surfactant into the pseudo sol for mixing; (2) performing ultrasonic treatment and oil ammonia column forming treatment on the product obtained in the step (1) to obtain gamma-Al2O3 spherical gel beads; and (3) aging, washing, drying and calcining the gamma-Al2O3 spherical gel beads obtained in the step (2) to obtain the porous spherical alumina with high hydrothermal stability. The spherical aluminum oxide prepared by the method has a large specific surface area and a lamellar hierarchical pore structure, and is beneficial to loading of a catalyst in the aluminum oxide. And moreover, the hydrothermal stability is obviously improved, the stability of the catalyst in petroleum reforming is obviously improved, and the catalyst has industrial production utilization value and commercial value.

The present invention relates to a hydrophobic polyelectrolyte multilayer (PEM) membranes comprised of a polyelectrolyte layer comprised of one or more bilayer(s) of a polycation and a polyanion, preferably an nanofiltration PEM membrane. The present invention further relates to a method for providing an asymmetrical PEM membrane, or the use of the PEM membranes for the purification, decontamination or cleanup of water, including drinking water.

The invention provides a melt-blown / melt-blown composite porous nano-micron polylactic acid melt-blown material and a preparation method thereof.The preparation method comprises the steps that a first melt-blown solution is adopted to conduct spray-spinning net forming on the polylactic acid melt-blown material to obtain a primary melt-blown material, and the first melt-blown solution is a polylactic acid solution formed by dissolving polylactic acid with a chemical solvent; carrying out hot rolling on the primary melt spraying material, and carrying out liquid electret by adopting electret liquid to obtain an electret material; the electret material is subjected to spray spinning through a second solution spraying solution, low-temperature hot air drying is conducted, a secondary solution spraying material is obtained, the second solution spraying solution comprises a polylactic acid solution formed by dissolving polylactic acid through chemical solvents and polyelectrolyte, and the chemical solvents comprise at least two solvents different in boiling point and volatilization speed; the secondary melt-blown material is subjected to electrostatic electret, the porous nano-micron polylactic acid melt-blown material is obtained, and the problems that an existing polylactic acid melt-blown material is low in filtering efficiency, poor in electret effect after electret, short in charge storage time of the melt-blown material, low in filtering efficiency and the like are solved.

The invention discloses preparation and application of a liquid metal micro-nano robot for treating colitis, and belongs to the technical field of biomedical materials and micro-nano robots. The liquid metal micro-nano robot is prepared by taking liquid metal micro-droplets as a core, coating the surface of the liquid metal micro-droplets with a polyelectrolyte multilayer film through a layer-by-layer self-assembly technology, and loading a medicine (such as mesalazine) for treating colitis in the polyelectrolyte multilayer film. The liquid metal micro-nano robot realizes colon targeted aggregation after oral administration, and can generate autonomous movement and photothermal effect under the irradiation of near-infrared light, thereby realizing phototropic targeted aggregation, photothermal triggering of drug release, and drug delivery and drug delivery. The problems that an existing mesalazine preparation is low in targeted delivery efficiency and a chemically-driven micro-nano robot is low in targeted delivery efficiency in a colon area are solved.

The invention belongs to the technical field of microorganism immobilization, and particularly relates to a preparation method of hydrogel microspheres loaded with microorganisms to realize gas-liquid interface exposure. The hydrogel microsphere is of a core-shell structure and comprises core hydrogel containing nutrient substances, a polyelectrolyte layer located on a core-shell interface and an outer hydrogel shell used for immobilizing microorganisms. Stable construction and consistency control of the microsphere structure are realized in the core-shell assembly process; under the action of gaseous pollutant exposure and osmotic pressure, the outer-layer hydrogel shrinks and forms a film structure, so that microorganisms are stably distributed and are continuously in a gas-liquid interface exposure state; the core hydrogel continuously releases water and nutrient substances to the shell layer, the growth and biological functions of immobilized microorganisms under the semi-exposure condition are maintained, the polyelectrolyte layer limits the microorganisms from migrating to the core, and the stability of the exposed state of the microorganisms is guaranteed. The hydrogel microspheres have good optical transparency and microorganism loading consistency, and are suitable for in-situ detection of the toxic effect of gaseous pollutants.

The present application relates to a kind of chemical makeup-removing soft wipes and preparation method thereof, belong to the technical field of cosmetic products.The present application is with negative charge polyelectrolyte gel solution modification nano metal oxide, with positive charge polyelectrolyte gel solution modification mesoporous nano silicon oxide, two kinds of modified nanometer materials are mixed with core layer hydrophilic polymer and shell layer hydrophobic polymer respectively in spinning process, by coaxial spinning, three-stage traction stretching and cutting, functional short fiber is prepared, again by non-woven fabric processing technology and ultrasonic activation treatment is made into chemical makeup-removing soft wipes;When the soft wipes meet water, the built-in potential and nano channel between fiber core and shell, which are constructed by the two kinds of modified nanometer materials, can break the water molecule aggregation state and convert it into small molecule water, and small molecule water can quickly penetrate cosmetic oil film, so as to realize the "self-dissolution" makeup-removing effect without chemical solvent dependence.

Composition (C1) for hand disinfection comprising: a) At least one alcohol having one to four carbon atoms, b) At least one water-in-oil type emulsion (E) comprising: a cross-linked anionic polyelectrolyte (P); a fat phase consisting of at least one oil (H), water, a water-in-oil type emulsifying system (S1), and an oil-in-water type emulsifying system (S2); (c) at least one compound of formula (II): R2-(C=O)-O-(CH2-CH2-O)x-CH2-CH[(O-CH2-CH2)yO-(C=O)-R3]-CH2-(O-CH2-CH2)zO-(C=O)-R4 (II) wherein R2-(C=O), R3-(C=O) and R4-(C=O), whether identical or different, represent an acyl group, saturated or unsaturated, linear or branched, comprising from sixteen to twenty-four carbon atoms, and wherein the sum x + y + z is greater than or equal to thirty and less than or equal to one hundred; and (d) water.

The application belongs to the technical field of preparation of photo-thermal water production membranes, and discloses a CAT-based mixed matrix membrane, a preparation method and application, which is made of Ti-CAT, CNT and PCMVIMX; the three-dimensional network structure Ti-CAT is used as a water transmission channel, the CNT acts as a solar light absorber to increase the light absorption of the membrane, and the self-crosslinking property of PCMVIMX under ammonia gas is used as an adhesive to crosslink Ti-CAT and CNT together, and finally a dense photo-thermal water production membrane is formed. The water production membrane has good acid-base stability, excellent cycle performance and salt resistance. The membrane preparation method is simple and convenient, and can quickly prepare a high-speed water production membrane. The method is suitable for preparing a mixed matrix membrane of a porous material and a carbon material, and in general cases, the preparation of a photo-thermal water production membrane usually uses a coating method. The method for preparing the membrane by using such a polyelectrolyte as an adhesive is helpful to improve the stability of the membrane.

The application discloses a kind of biomimetic mineralization materials with high stable protection DNA and preparation method thereof.DNA molecule is self-assembled with divalent metal ion, and DNA / metal nanoparticle is obtained; polyelectrolyte layer is wrapped on the surface of DNA / metal nanoparticle by layer-by-layer assembly technology, and DNA / metal@LBL nanoparticle is obtained; polydopamine layer is deposited on the surface of DNA / metal@LBL nanoparticle, and DNA / Fe@LBL@PDA particle is obtained, which is biomimetic mineralization material with high stable protection DNA.The biomimetic mineralization material has the advantages of simple construction, high density and long-term stability, and can effectively protect the stability and integrity of DNA molecule in harsh external storage environment (such as ROS, high temperature, high salt, alkaline, humid, biological solvent and nuclease environment).The present application can provide technical support for DNA high-density storage and long-term stability storage, and has wide application value in the fields of biological medicine, genetic engineering, disease treatment and DNA storage.

The application discloses a finishing method of chitosan fiber and chitosan fiber prepared by the method, and comprises the following steps: preparing an acid aqueous solution of an anionic polyelectrolyte, adding a crosslinking agent and stirring uniformly, pre-crosslinking, and obtaining a pre-crosslinked chitosan fiber finishing solution; immersing formed chitosan fiber into the pre-crosslinked chitosan fiber finishing solution for soaking, drying and heat-crosslinking, and immersing into ethanol, and obtaining finished chitosan fiber. The application utilizes the property that chitosan fiber is activated into a cationic electrolyte under an acid condition, and an anionic polyelectrolyte is strongly adsorbed on the surface of the chitosan fiber through electrostatic interaction, effectively solves the problem that the interaction force between a sizing agent and other finishing agents and the chitosan fiber is weak, and effectively avoids the problem that the mechanical property of the chitosan fiber is poor due to the falling-off of the finishing agents and the sizing agent during use.

The invention discloses a zymolyte microcapsule and a preparation method thereof, and belongs to the technical field of microcapsules. According to the method, calcium chloride is added in the process of preparing the sodium alginate solution, so that the stability of the wall material is improved, the loss of polypeptide in the homogenizing process can be reduced, the retention rate of the polypeptide is increased, and the loss of active substances is reduced. Positively charged calcium ions (Ca < 2 + >) can be strongly attracted by negatively charged carboxyl (-COO <->) on a sodium alginate chain to form a water-insoluble three-dimensional network structure. A large number of primary amino groups exist on a molecular chain of chitosan, a large number of carboxyl groups exist on a molecular chain of sodium alginate, and the primary amino groups and the carboxyl groups can form a polyelectrolyte membrane through positive and negative charge attraction, so that efficient embedding and intestinal targeted release of zymolyte are realized, and the stability and bioavailability of peptide are remarkably improved; and a technical basis is provided for developing functional foods based on the meat hydrolysate.

The invention discloses a natural polymer polyelectrolyte microsphere as well as a preparation method and application thereof, the microsphere is of a covalent and non-covalent double-crosslinking network structure formed by crosslinking natural polymer and polyelectrolyte, and the modification degree of the crosslinked natural polymer is 1.0-50.0%; the natural polymer is a compound containing more than two carboxyl groups or amino groups or a combination of the carboxyl groups and the amino groups; and the polyelectrolyte is a compound containing more than two carboxyl groups or amino groups or a combination of the carboxyl groups and the amino groups. The preparation method comprises the following steps: S1, dissolving a natural polymer and a polyelectrolyte in a water phase to generate an electrostatic complex; s2, adding enzyme into the electrostatic complex and incubating to form microspheres; and S3, adding a condensing agent and / or a cross-linking agent, removing the unreacted condensing agent and / or cross-linking agent, and sterilizing to obtain the natural polymer polyelectrolyte microspheres. The microsphere can be used as an embolism agent in an interventional technology or a separation and purification medium of protein, antibodies and drugs or a cell and drug carrier system, or as an implant material for orthopedics, surgery, ophthalmology and medical beauty.

The application discloses a kind of zwitterionic composite hydrogel adhesive and preparation method thereof, the method uses one-pot copolymerization method, with MBAA and borax as crosslinking agent, preparation contains SBMA, PVA, THMA and AMPS zwitterionic polyelectrolyte hydrogel, with excellent adhesive property and biocompatibility, suitable for biological medicine field.The method polyvinyl alcohol enhances the physical properties of hydrogel due to its crosslinking site and hydrogen bond.SBMA cationic and anionic group improves the adhesive property, and the reaction monomer THMA provides hydrogen bond effect, further promotes adhesion, so that the prepared hydrogel adhesive exhibits excellent adhesive property and biocompatibility, suitable for wound dressing, drug release system and tissue engineering biological medicine applications.

The invention relates to the technical field of nano carbon materials, and particularly discloses a preparation method of single-walled carbon nanotube slurry, the single-walled carbon nanotube slurry and application thereof.The preparation method of the single-walled carbon nanotube slurry comprises the following steps that low-temperature plasma oxidation treatment is conducted on single-walled carbon nanotubes with the tube bundle diameter smaller than or equal to 100 nm and IG / ID larger than or equal to 50, meanwhile, mechanical shearing is conducted, and the single-walled carbon nanotubes with the tube bundle diameter smaller than or equal to 100 nm and IG / ID larger than or equal to 50 are obtained; dispersing in deionized water to obtain primary dispersion liquid of which the beam splitting index is greater than or equal to 0.80; mixing the primary dispersion liquid, a fluorine-containing surfactant, an amphiphilic ionic liquid and deionized water according to a mass ratio, performing high-pressure homogenization, and performing ultrasonic treatment to obtain a secondary dispersion liquid; and adding a pH response type polyelectrolyte into the secondary dispersion liquid, adjusting the pH value of the system to 6.5-8.0, and carrying out microjet homogenization to obtain the single-walled carbon nanotube slurry with the single-beam content of more than or equal to 70%, the viscosity of 500-5000 cP and D50 of less than or equal to 3 microns. According to the invention, on the premise of not introducing metal impurities and obvious structure defects, efficient beam splitting, long-term stable dispersion and batch consistency of the single-walled carbon nanotubes can be realized.

The invention belongs to the technical field of functional polymer materials and photocatalysis, and particularly relates to a preparation method and application of an antibacterial coating based on polyvinyl chloride plastics. Comprising the following steps: S1, pretreatment; s2, carrying out a reaction; s3, post-processing is carried out; s4, compounding with polyelectrolyte; and S5, preparing the coating. Through a specific catalytic cracking process, the waste PVC is converted into a functional photocatalytic antibacterial coating material, so that resource utilization and functional utilization of the waste chlorine-containing plastic are realized; a catalytic cracking process under a solvent-free condition is adopted, so that the use of an organic solvent is avoided; the coating material has relatively good photochemical stability, and can realize a relatively lasting antibacterial effect; the method has relatively low requirements on equipment, reaction conditions are easy to control, and the method is not only suitable for laboratory research, but also convenient for engineering and industrial amplification. And by combining the processing performance of the obtained coating, the technology has popularization and application potential.