871 results about "Modified cellulose" patented technology

The invention relates to the technical field of oilfield chemistry, and discloses a graft modified cellulose filtrate reducer and a preparation method thereof.The preparation method comprises the following steps that modified hydroxyethyl cellulose, 2-acrylamide-2-methyl propane sulfonic acid, dimethyl diallyl ammonium chloride, alkenylated cardanol and N, N '-methylene bisacrylamide are added into deionized water, stirring is conducted, and a mixture is obtained; the preparation method comprises the following steps: adding cellulose into a reaction kettle, stirring for 10-15 minutes at the temperature of 40-60 DEG C at the speed of 300-400 rpm, dropwise adding ammonium persulfate and sodium hydrogen sulfite into a system, and continuously reacting for 4-6 hours to obtain the grafted modified cellulose filtrate reducer. The filtrate reducer disclosed by the invention has good high temperature resistance and salt resistance.

The invention discloses unsaturated polyester resin for an unmanned aerial vehicle fuselage and a preparation method of the unsaturated polyester resin, and relates to the field of high polymer materials. When the unsaturated polyester resin for the unmanned aerial vehicle fuselage is prepared, a flame-retardant monomer reacts with 2-hydroxy-5-(hydroxymethyl) benzaldehyde to prepare a modified flame-retardant monomer; reacting cellulose with acrylic acid to obtain pre-modified cellulose; the pre-modified cellulose, 1-allyl-1, 1, 3, 3-tetramethyldisiloxane and chloroplatinic acid are subjected to a reaction, and modified cellulose is prepared; maleic anhydride, 5-(1H-imidazole-1-yl)-1, 3-phthalic acid, propylene glycol and the modified flame-retardant monomer are subjected to a reaction, and pre-polyester is prepared; and stirring the pre-polyester, zinc chloride, modified cellulose, benzophenone peroxide and styrene to obtain the anti-aging coating. The prepared unsaturated polyester resin for the unmanned aerial vehicle fuselage has good anti-aging, self-repairing, flame-retardant and self-cleaning performance.

The invention belongs to the technical field of coatings, and discloses an anti-sinking water-based acrylic resin coating and a preparation method thereof.The anti-sinking water-based acrylic resin coating is prepared from, by weight, 110-130 parts of modified water-based acrylic resin, 10-25 parts of modified cellulose nanocrystals, 3-5 parts of a composite additive, 4-6 parts of a dispersing agent, 0.5-2 parts of a defoaming agent, 0.5-2 parts of a flatting agent and 10-20 parts of water; the acrylic resin is modified by using the organic silicon oligomer and the epoxy resin, the film hardness is high, the adhesive force is strong, and the film hardness, the impact resistance, the ultraviolet aging resistance and the flame retardant property of the material are improved by adding the modified cellulose nanocrystals and the composite additive.

The invention discloses a water body heavy metal ion pollution treatment adsorption filtering membrane and a preparation method thereof, and relates to the technical field of water treatment. When the water body heavy metal ion pollution treatment adsorption filtering membrane is prepared, graphene oxide sequentially reacts with 3-diethylaminopropylamine, tetrabromophenyl porphyrin and N, N-diethyl allylamine, and functionalized graphene oxide is prepared; the preparation method comprises the following steps: reacting cellulose with 4 '-bromo-2, 2': 6 ', 2' '-terpyridyl and maleic anhydride in sequence to prepare modified cellulose; the preparation method comprises the following steps: reacting sodium alginate with propylene oxide to prepare modified sodium alginate; the modified sodium alginate, the modified cellulose, the functionalized graphene oxide, trans, trans-1, 3-butadiene-1, 4-dicarboxylic acid and a photoinitiator are subjected to a reaction, a membrane is prepared, and the water body heavy metal ion pollution treatment adsorption filtering membrane is prepared. The water body heavy metal ion pollution treatment adsorption filtering membrane prepared by the invention has good antibacterial and photocatalytic organic matter degradation capabilities.

The invention relates to the field of plastic films, and particularly discloses a bio-based antibacterial cool-feeling breathable film and a preparation method thereof. The bio-based antibacterial cool-feeling breathable film is prepared from the following raw materials in percentage by weight: 49 to 66.5 percent of matrix resin, 30 to 40 percent of pore-foaming agent, 1 to 3 percent of silane modified cellulose nanofiber, 1 to 2 percent of antibacterial agent, 1 to 5 percent of composite cool-feeling agent and 0.5 to 1 percent of auxiliary agent, the matrix resin comprises PBAT resin and PLA resin in a mass ratio of (7: 3)-(5: 5); the composite cool feeling agent comprises nano aluminum nitride and graphene in a mass ratio of (5-15): 1. The bio-based antibacterial cool-feeling breathable film can be used for medical dressings, disposable medical supplies, mother and baby products and the like, and has the advantages of being good in breathability and moisture penetrability, high in antibacterial capacity, lasting in antibacterial effect, high in mechanical strength, high in cool-feeling coefficient, comfortable to wear and not prone to stuffiness.

The invention relates to the technical field of lithium ion battery fire extinguishing agents, in particular to a lithium ion battery fire extinguishing agent and a preparation process. The preparation process comprises the following steps: S1, biomass pretreatment: mixing 40-50 parts of chitin powder with a 2wt% sodium hydroxide solution according to a mass volume ratio of 1: 10, stirring at 60 DEG C for 1-2 hours, and centrifuging and freeze-drying to obtain a chitin crude product; dispersing the chitin crude product in deionized water, and carrying out ultrasonic treatment to obtain a cellulose suspension with the solid content of 1%; s2, cellulose modification: adding 15-20 parts of povidone into the cellulose suspension, and mixing and stirring at 60 DEG C for 1 hour to obtain a modified cellulose suspension; s3, introducing nano silicon dioxide; s4, preparing modified gel; and S5, cross-linking and drying.

The invention relates to a natural antioxidant for prefabricated vegetables and a preparation method of the natural antioxidant, and belongs to the technical field of food additives. The antioxidant is prepared from rosmarinic acid, carnosic acid, drug-loaded cellulose and double-phase chelating microspheres; the drug-loaded cellulose is prepared by modifying cellulose with quercetin, loading anthocyanin and then wrapping with a trehalose-gamma-polyglutamic acid composite film; the biphase chelating microspheres are phytic acid-citric acid biphase sustained-release microspheres formed by wrapping phytic acid and citric acid with a chitosan and sodium alginate composite film. Through multi-component functional complementation, multi-stage slow release design and physical-chemical synergistic barrier, comprehensive inhibition of the oxidation problem of the prefabricated vegetable is realized, a'free radical scavenging-metal chelating-phase interface stabilization 'triple protection system is constructed, accurate oxidation resistance in different stages of processing, storage and transportation is realized, and the prepared vegetable has good market prospects. The bottlenecks of short action period and single protection dimension of a natural antioxidant are broken through.

The invention relates to the technical field of polymethacrylimide foam, in particular to polymethacrylimide wave-absorbing foam and a preparation method thereof. The high-temperature-resistant acrylic resin is prepared from the following raw materials in parts by weight: 55 to 60 parts of methacrylic acid, 45 to 55 parts of methacrylonitrile, 5 to 8 parts of 1-amino octadecane, 0.3 to 0.6 part of N-acrylamide, 0.4 to 0.7 part of N-hydroxysuccinimide ester, 0.5 to 1.2 parts of carbodiimide, 4 to 7 parts of tridecyl methacrylate, 2 to 8 parts of functional filler, 0.35 to 0.40 part of initiator, 0.6 to 0.8 part of foaming agent, 12 to 15 parts of cross-linking agent and 8 to 12 parts of absorbent. 21-35 parts of modified cellulose, 12-25 parts of a biomass-based additive, and 5-18 parts of a dispersant. The prepared polymethacrylimide wave-absorbing foam is relatively good in mechanical property, and shows excellent chemical stability under the conditions of room temperature and extremely low temperature.

The invention relates to the field of oral cavities, and particularly discloses a lasting antibacterial type composite tooth socket for medicine carrying and a preparation method thereof.The lasting antibacterial type composite tooth socket comprises an adsorption layer and an antibacterial membrane layer, the adsorption layer is used for adsorbing oral cavity treatment liquid medicine, and the antibacterial membrane layer comprises a nano-silver antibacterial layer and a chitosan antibacterial layer; the preparation method comprises the following steps: mixing a tea polyphenol-polylactic acid composite solution, a nano-silver-carboxylation modified cellulose compound and a polyvinyl alcohol solution, and carrying out electrostatic spinning to prepare a nano-silver antibacterial fiber membrane, so as to form the nano-silver antibacterial layer; mixing chitosan with hot water, adding cinnamyl aldehyde, glycerol and boric acid, stirring to obtain a mixed solution, coating one side of the nano-silver antibacterial layer with the mixed solution, and curing to form a chitosan antibacterial layer; the adsorption layer is attached to the side, away from the chitosan antibacterial layer, of the nano-silver antibacterial layer, and then the lasting antibacterial type composite tooth socket for carrying the medicine is prepared through hot-pressing compounding. The drug-loaded composite tooth socket has the characteristic of further improving the antibacterial property and the antibacterial durability of the drug-loaded composite tooth socket.

The invention discloses a high-toughness biaxially oriented nylon film and a production method thereof. Comprising the following raw materials in parts by weight: 40-50 parts of copolymerized nylon resin, 10-20 parts of nylon 12, 15-25 parts of thermoplastic polyamide elastomer, 3-6 parts of nanofiller, 1-3 parts of coupling agent, 10-20 parts of reinforced fiber, 5-8 parts of additive, 3-7 parts of ethylene-methyl acrylate-glycidyl methacrylate terpolymer and 6-10 parts of modified cellulose nanocrystal. The invention relates to a flame-retardant polyamide resin, which is prepared from the following components in parts by weight: 2-4 parts of amino-terminated hyperbranched polyamide and 1-3 parts of 3, 3 '-diamino-4, 4'-difluorodiphenyl sulfone. The film is high in tensile strength, good in tear resistance and excellent in barrier property and low-temperature impact resistance.

The invention belongs to the field of composite ink coatings, and particularly discloses a high-thermal-conductivity and high-adhesiveness copper foil coating ink coating as well as a preparation method and application thereof. The ink coating is prepared from the following components in parts by weight: 15 to 25 parts of epoxy resin, 10 to 20 parts of polyurethane resin, 5 to 12 parts of modified cellulose, 30 to 45 parts of heat-conducting filler, 8 to 15 parts of aliphatic polyisocyanate curing agent, 20 to 35 parts of solvent, 2 to 5 parts of silane coupling agent and 0.5 to 3 parts of pigment. The modified cellulose is prepared by modifying halogen-free betaine hydroxide, and can cooperate with the double-resin matrix to enhance the interface bonding force and construct a three-dimensional heat-conducting network. After the surface of an electrolytic or rolled copper foil is coated with the ink coating, the heat conductivity coefficient of the coating is larger than 0.4 W / (m.K), the dyne value is larger than 38, the cross-cut test is larger than or equal to 4B, alcohol wiping resistance is achieved, falling is avoided, the color difference delta E is smaller than 1, and the ink coating is suitable for a high-frequency circuit substrate and a lithium battery current collector.

The invention provides an exosome enrichment method based on a modified cellulose material, which comprises the following steps: carrying out TEMPO oxidation on plant residue cellulose to prepare a cellulose material with a carboxyl structure; the cellulose structure is further refined by adopting mechanical shearing and high-pressure homogenizing means, so that the specific surface area and the dispersion stability are remarkably improved; through polyethyleneimine PEI grafting, a large number of amino functional groups are introduced, the surface electropositivity of the material is enhanced, and efficient adsorption and enrichment of exosomes with negative charges are achieved. The invention also provides the exosome prepared by the method. The modified cellulose material disclosed by the invention is wide in source, simple and convenient to prepare and mild in enrichment process, the separation purity and the enrichment efficiency of the exosome can be remarkably improved, and the modified cellulose material has good biocompatibility and environmental friendliness; compared with existing ultracentrifugation, density gradient centrifugation and immunoaffinity separation methods, the method has the advantages that the operation process is simplified, the equipment dependence and reagent cost are reduced, and the potential of large-scale production and clinical application is achieved.

The invention relates to a high-strength and high-toughness polylactic acid composite material and a preparation method thereof, and belongs to the technical field of biodegradable high polymer materials. The formula of the polylactic acid composite material comprises the following components in parts by weight: 70-80 parts of polylactic acid, 5-10 parts of modified cellulose nanocrystals, 3-5 parts of modified montmorillonite, 1-2 parts of a plasticizer and 0.5-1.5 parts of an antioxidant. A preparation method of the modified cellulose nanocrystals comprises the following steps: adding cellulose nanocrystals into deionized water, and carrying out ultrasonic treatment to obtain a dispersion liquid A; and sequentially adding 0.5-1 M tannic acid solution at the temperature of 60 DEG C into the dispersion liquid A, cooling to room temperature, dropwise adding 3 M octadecylamine-ethanol solution, washing with ethanol and deionized water, and carrying out step-by-step freeze-drying treatment to obtain the modified cellulose nanocrystal, the polylactic acid composite material prepared by the preparation method has high strength, high toughness and good high temperature resistance.

The invention discloses an environment-friendly flame-retardant polyvinyl alcohol film and a preparation method thereof, and relates to the technical field of polyvinyl alcohol films. The polyvinyl alcohol film is prepared from the following components in parts by weight: 90 to 110 parts of polyvinyl alcohol, 0.4 to 1.2 parts of polydopamine modified cellulose nanocrystals, 8 to 15 parts of chitosan / phytic acid / boron nitride composite flame retardant and 0.6 to 0.9 part of plasticizer. The preparation method comprises the following steps: adding polyvinyl alcohol into deionized water, dissolving and mixing to obtain a polyvinyl alcohol aqueous solution, adding glycerol, continuously stirring for 1-2 hours, sequentially adding a chitosan / phytic acid / boron nitride composite flame retardant and polydopamine modified cellulose nanocrystals, and uniformly stirring and mixing at 50-70 DEG C to obtain a blended solution; and carrying out film casting on the blended solution. The limit oxygen index of the film is greater than or equal to 30%, the vertical combustion grade is V-0, the tensile strength is greater than or equal to 40%, the elongation at break is greater than or equal to 140%, and the light transmittance is greater than or equal to 85%.

The invention relates to the field of packaging materials, and particularly discloses a degradable environment-friendly electric insulation plastic packaging bag and a preparation method thereof. The degradable environment-friendly electric insulation plastic packaging bag is prepared from the following raw materials in parts by weight: 100 parts of polylactic acid, 1-4 parts of organic zirconium phosphate, 2-5 parts of hydrophobic modified cellulose nanocrystals, 4-10 parts of polyimide / aluminum fluoride composite nanofibers, 1-3 parts of a dispersing agent, 1-4 parts of an antioxidant, 3-5 parts of inorganic filler, 1-3 parts of a slipping agent, 1-3 parts of an antistatic agent and 3-5 parts of a flame retardant. The packaging bag can be used for objects with high requirements for electrical insulation, has high electrical insulation capacity at high temperature, and is high in transparency and mechanical property.

The invention discloses a graphene conductive adhesive and a preparation method thereof, and relates to the technical field of adhesives. When the graphene conductive adhesive is prepared, polyethylene glycol diglycidyl ether and an ultraviolet absorbent react to prepare a functionalized epoxy monomer; the preparation method comprises the following steps: polymerizing a dihydroxy diphenyl phosphorus-containing monomer and phenyl dichlorosilane, and coating graphene with the polymerized dihydroxy diphenyl phosphorus-containing monomer and phenyl dichlorosilane to prepare pre-modified graphene; the pre-modified graphene and allyl glycidyl ether are subjected to a reaction, and modified graphene is prepared; carrying out polymerization growth on 5, 6-dihydroxyindole and 6-aminomethylindole on the pre-modified cellulose to prepare modified cellulose; and uniformly mixing epoxy resin, a functionalized epoxy monomer, the modified graphene, the modified cellulose, isophorone diamine and acetone to prepare the graphene conductive adhesive. The graphene conductive adhesive prepared by the invention has excellent anti-aging, flame-retardant, conductive and adhesive properties and mechanical properties.

The invention relates to a multilayer packaging material with high barrier property and application thereof. The multi-layer packaging material at least comprises three layers, namely a layer A, a layer B and a layer C, wherein the layer B is located between the layer A and the layer C; the layer A is prepared from the following raw materials: first biodegradable polyurethane and a cellulose nanocrystal graft which is obtained by performing grafting treatment on cellulose nanocrystal after hydrophobic modification, and the content of the cellulose nanocrystal graft is 1wt%-10wt% of that of the first biodegradable polyurethane; the raw material of the layer B comprises biodegradable polyester containing a glycollic acid structural unit, and the content of the glycollic acid structural unit is not less than 60% mol; the raw material of the layer C comprises second biodegradable polyurethane. The hydrophobic modified cellulose nanocrystals are uniformly dispersed in the layer A, so that the adsorption of water vapor on the layer A is reduced, the permeation of the water vapor is hindered, and the barrier property of the whole material is improved.

The invention discloses environmentally degradable plastic as well as a preparation method and application thereof, and belongs to the technical field of degradable plastic. The degradable modified plastic is prepared from the following raw materials: polylactic acid, poly (butylene terephthalate)-adipate, modified thermoplastic starch, modified cellulose, poly (butylene succinate), epoxidized soybean oil, polyvinyl alcohol, glycerol monolaurate and ethylenediaminetetraacetic acid. Wherein the modified thermoplastic starch is obtained by thermoplastic modification of starch through a plasticizer and modification of castor oil and toluene diisocynate; the modified cellulose is obtained by modifying cellulose acetate with chitosan. By regulating and controlling the types and proportions of the raw materials for preparing the plastic, the plastic with excellent degradation performance and mechanical performance can be obtained, the shopping bag is prepared from the plastic, the loading capacity can be remarkably improved, the plastic is easily degraded by microorganisms in the environment after being discarded, and environmental pollution is avoided.

The invention relates to the technical field of polymer compositions, and particularly discloses a degradable bio-based food packaging material and a preparation method thereof.The degradable bio-based food packaging material is prepared from polylactic acid, ITA esterified bacterial cellulose, CSL-ITA esterified bacterial cellulose, polycaprolactone glycol, acetyl tributyl citrate, a photoinitiator and tocopherol; the preparation method comprises the following steps: esterifying bacterial cellulose hydrogel with itaconic anhydride, grafting with sodium copper chlorophyllin, dehydrating with gradient ethanol, and drying with supercritical CO2 to obtain modified powder; according to the preparation method, the interfacial compatibility of the bacterial cellulose and the polylactic acid is enhanced through ITA esterification, the illumination antibacterial function is given by utilizing CSL grafting, the polycaprolactone glycol and the acetyl tributyl citrate are synergistically used for toughening and improving the brittleness, the photoinitiator is added, the photoinitiator is added for mixing, and ultraviolet crosslinking curing is performed after film forming. The tocopherol protects the stability of the antibacterial structure of the CSL, the water resistance is improved through photo-crosslinking, and the material is degradable and meets the food packaging requirement.

The invention discloses an insulating material with corrosion resistance and a production process thereof, and relates to the technical field of insulating materials. The invention discloses an insulating material with corrosion resistance. The invention discloses a flame-retardant coating which is prepared from the following raw materials in parts by weight: 60 to 80 parts of bisphenol A epoxy resin, 20 to 30 parts of polyether-ether-ketone, 10 to 15 parts of nano aluminum nitride, 5 to 10 parts of boron fiber, 4 to 8 parts of molybdenum disulfide, 3 to 6 parts of poly (p-phenylene benzobisoxazole), 2 to 5 parts of vinyl trimethoxy silane, 20 to 30 parts of dimethyl sulfoxide, 8 to 12 parts of melamine cyanurate, 6 to 10 parts of magnesium aluminum hydroxide, 1 to 3 parts of Chimassorb 944 and 10 to 20 parts of modified polyvinyl alcohol. The coating is prepared from the following components in parts by weight: 20-30 parts of modified cellulose, 8-15 parts of modified cellulose, 3-7 parts of nano-zirconia, 5-10 parts of polysiloxane elastomer and 7-12 parts of fluorine-containing acrylate copolymer. The raw materials of the insulating material have a synergistic effect, and the prepared insulating material not only has conventional electrical insulation, but also has excellent heat resistance, corrosion resistance and the like, integrates hardness, flexibility, flame retardance and self-repairing performance, greatly expands the application range of the insulating material, and provides powerful support for industry development.

The invention discloses a high-strength anti-freezing vegetable protein adhesive based on multi-scale structure regulation and a preparation method thereof. The vegetable protein adhesive is mainly prepared from the following raw materials: vegetable protein meal, an anti-freezing modifier, modified cellulose nanocrystals, a chemical cross-linking agent and a dispersion medium. Wherein the components comprise 30 parts of vegetable protein meal, 10-15 parts of an anti-freezing modifier, 0.5-1.2 parts of modified cellulose nanocrystals, 4-6 parts of a chemical cross-linking agent and 70 parts of a dispersion medium. The invention provides a high-strength anti-freezing vegetable protein adhesive based on multi-scale structure regulation and control, which breaks through the bottleneck of low-temperature freezing and brittleness of the traditional adhesive, effectively solves the problem of poor performance of the vegetable protein adhesive in a low-temperature environment, fills up the blank of a bio-based adhesive in the low-temperature field, and has a wide application prospect. The anti-freezing performance, the bonding strength, the environment-friendly performance and the sustainability are excellent.

The present invention belongs to the field of waterborne coatings, and discloses a lightweight waterborne multi-functional coating for new energy vehicles. According to the parts-by-weight ratio, it includes 67 parts of acrylic emulsion, 18 parts of modified hydrophobic calcium silicate aerogel micropowder, 5.7 parts of water, 0.3 parts of modified cellulose, 0.7 parts of dispersant, 3 parts of polyether polyol, and 2.8 parts of blocked aliphatic isocyanate. It mainly solves problems such as noise reduction, shock absorption, and lightweight of automobiles, and solves the problem that traditional waterborne damping coatings have a relatively large density and are difficult to reduce weight. The present invention synthesizes modified hydrophobic calcium silicate aerogel, which maximally reduces the dry film density while ensuring strength, and prevents the decline of damping performance caused by water absorption; polyether polyol and blocked aliphatic isocyanate are used for activated micro-foaming in the medium and high temperature regions, which not only achieves the purpose of sound insulation and noise reduction, but also reduces the density and realizes the lightweight of the material.

The invention discloses a solid waste-based low-carbon gel material and a preparation method thereof. The material comprises the following components in percentage by mass: 40%-60% of high-activity slag, 20%-35% of tower bottom ash subjected to stage treatment, 3%-8% of a pH sensitive composite exciting agent, 0.5%-2% of nano C-S-H seed crystal, 0.1%-1% of modified cellulose nanocrystals and 15%-25% of water, and the water-solid ratio is controlled to be 0.15-0.28. The preparation method comprises the steps of tower bottom ash grading pretreatment, nano C-S-H seed crystal preparation and dispersion, pH sensitive composite exciting agent preparation, mixing and slurry preparation. Sulfate release is optimized through staged treatment, alkalinity is dynamically regulated and controlled through a pH sensitive exciting agent, ordered hydration and a multi-stage pore structure are induced through nano C-S-H seed crystals and modified cellulose nanocrystals, and the compressive strength, the impermeability and the low expansion rate are remarkably improved. Industrial solid waste is effectively utilized, energy consumption and carbon emission are reduced, the problems of non-uniform hydration and expansion cracking are solved, and the method is suitable for the fields of green buildings and resource recycling.

The invention belongs to the field of underground engineering grouting material research, development and application, and provides a diffusion boundary controllable grouting material for underwater accumulation reinforcement and a preparation method thereof, the diffusion boundary controllable grouting material comprises the following raw materials by weight: 800-1000 parts of a material matrix component, 0-25 parts of a comprehensive admixture, 0-200 parts of instant sodium silicate, and 600-800 parts of water. The comprehensive admixture comprises an anti-dispersing agent and a water reducing agent; the anti-dispersing agent is mainly prepared from the following raw materials in parts by weight: 7 to 8 parts of high polymer, 9 to 10 parts of modified cellulose ether, 1 to 3 parts of natural polysaccharide and 1 to 2 parts of synthetic copolymer. The material has the advantages of being good in underwater dispersion resistance, controllable in setting time and easy to accumulate, and filling of an underwater goaf is facilitated.

The present invention relates to: a composition for modifying the surface of an electrode active material for a secondary battery, wherein the composition comprises cellulose, modified cellulose, or a mixture thereof; an electrode active material for a secondary battery, wherein the electrode active material is coated with cellulose, modified cellulose, or a mixture thereof; and a secondary battery comprising same. According to the present invention, a dry electrode can be manufactured by excluding the use of a fluorine-based binder or reducing the amount of the used fluorine-based binder, and excellent dispersibility and adhesion are achieved without using a PTFE binder conventionally used as a dry electrode binder, thereby enabling the production of a high-capacity thick film electrode.

The application belongs to the field of separation and specifically relates to a cellulose / PVDF electrostatic spinning oil-water separation membrane and a preparation method thereof. The preparation method comprises the following steps: S1: preparing cellulose stearate; S2: mixing cellulose stearate obtained in step S1 and polyvinylidene fluoride (PVDF) prepared into solutions respectively to obtain a spinning solution; and S3: defoaming the spinning solution obtained in step S2 and then electrostatic spinning to obtain a cellulose stearate / polyvinylidene fluoride (PVDF) hydrophobic oleophilic oil-water separation membrane. The mixed electrostatic spinning nanofiber membrane has better mechanical properties, and due to the addition of modified cellulose, the nanofiber membrane has greater separation flux, higher separation efficiency and greater porosity.

The invention discloses a bio-based super-hydrophobic ultraviolet curing coating which is prepared from the following raw materials in parts by weight: 33-66 parts of plant oil-based active monomers, 20-45 parts of polythiol, 1-40 parts of modified cellulose, 15-150 parts of an organic solvent and 1-5 parts of a photoinitiator, wherein the plant oil-based active monomer is prepared from epoxidized plant oil, unsaturated organic matters and a Lewis acid catalyst, and the unsaturated organic matters contain hydroxyl and carbon-carbon double bonds located at the tail end of a molecular chain. According to the bio-based super-hydrophobic ultraviolet curing coating disclosed by the invention, a three-dimensional interpenetrating network structure is obtained by cross-linking the plant oil-based active monomer, the polythiol and the cellulose in an ultraviolet curing process, a chemical bonding type surface microstructure super-hydrophobic material with excellent wear resistance is constructed, and the preparation method is simple. The invention further discloses application of the bio-based super-hydrophobic ultraviolet curing coating in surface treatment of a base material.

The invention belongs to the technical field of textile dyeing, and provides a salt-free alkali-free electrostatic spray dyeing method for cellulosic fibers, which comprises the following steps: uniformly mixing polyethylene oxide, reactive dye and solvent to obtain electrostatic dye liquor; the method comprises the following steps: dissolving a cationic modifier and an alkaline color fixing agent in water to prepare a cationic modified solution, padding a cellulose fiber fabric, and drying to obtain a cationic modified cellulose fiber fabric; and spraying the electrostatic dyeing liquid to the surface of the cationic modified cellulose fiber fabric through electrostatic spraying, and carrying out open-width steaming color fixation and cleaning to obtain the electrostatic spraying dyed cellulose fiber fabric. The electrostatic spraying technology is adopted to replace traditional water bath dyeing, excellent K / S value, dye uptake and color fastness can be achieved without consuming a large amount of salt, alkali and water, water resource consumption and environmental pollution are remarkably reduced, and high-salinity and high-chroma printing and dyeing wastewater is avoided.

The present invention relates to a bio-based and biodegradable superabsorbent polymer (SAP) comprising sodium alginate, modified cellulose, at least one activation agent, and at least one crosslinking agent. The SAP exhibits a high bio-based content of up to 93% and fulfills industrial composting standards such as EN 13432. The crosslinking reactions are performed under mild conditions, including ambient temperatures and neutral to alkaline pH, eliminating the need for high thermal energy. The resulting SAP granules demonstrate excellent liquid absorption performance, rapid swelling, high retention, and no observed toxicity or skin sensitization. The invention provides a sustainable alternative to petroleum-based SAPs for use in hygiene products, agriculture, and other disposable applications.

The invention relates to the field of fabrics, in particular to a breathable composite fabric and a preparation process thereof.The breathable composite fabric is characterized in that base cloth and a reinforcing layer are subjected to composite crocheting through polyester fibers to obtain a fabric body, and then the fabric body is transferred to protective finishing liquid to be subjected to padding treatment; bamboo charcoal fibers and cotton fibers are blended to serve as warps, the cotton fibers serve as wefts, and the warps and the wefts are interwoven to form base cloth; bamboo charcoal fibers are selected as warps, polyester fibers are selected as wefts, and the warps and the wefts are interwoven to form a reinforcing layer; the preparation method comprises the following steps: modifying chitosan with acrylic acid to obtain soluble N-carboxyethyl chitosan; the preparation method comprises the following steps: quantitatively modifying vanillin methacrylate by gelatin, modifying the gelatin by dopamine, and then grafting hexaborophosphazene; the preparation method comprises the following steps: by taking zinc acetate as a zinc source and cellulose nanocrystals as a template, carrying out in-situ polymerization-precipitation to obtain composite cellulose nanocrystals, carrying out dopamine polymerization to obtain polydopamine-coated composite cellulose nanocrystals, and then grafting hexaborophosphazene to obtain the modified cellulose nanocrystals.