501 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 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 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 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 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 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 a covalent organic framework modified cellulose nanofiber composite diaphragm which is characterized in that cellulose nanofiber is used as a matrix, an amide type or amine type covalent organic framework layer is grown on the surface in situ, the loading capacity of a covalent organic framework is regulated and controlled, and a hierarchical pore structure with gradient pore diameter is constructed; the preparation method comprises the following steps: synthesizing a covalent organic framework precursor bonded with an imine bond on the surface of cellulose nanofiber in situ by a one-pot method under an acidic mixed solution and a heating condition, and regulating and synchronously reducing to convert into an amine type covalent organic framework; or after the imine bond bonded covalent organic framework is synthesized in two stages, the imine bond bonded covalent organic framework is selectively converted into an amide type covalent organic framework through oxidation modification; the obtained cellulose nanofiber compound coated with the covalent organic framework is subjected to the processes of film forming, solvent replacement, supercritical drying and the like, and the composite diaphragm is obtained; the diaphragm has excellent electrolyte wettability, high liquid absorption rate, good ionic conductivity and thermal stability, and can promote uniform transmission of lithium ions and inhibit growth of lithium dendrites.

The invention discloses a plant-based deodorant and a preparation method thereof, and relates to the technical field of high polymer materials. When the plant-based deodorant is prepared, beta-cyclodextrin reacts with paratoluensulfonyl chloride and then reacts with ethylenediamine, and amino modified cyclodextrin is prepared; the plant-based extract is subjected to inclusion with amino modified cyclodextrin, and a cyclodextrin inclusion compound is prepared; the preparation method comprises the following steps: reacting hydroxyethyl cellulose with methacrylic anhydride to prepare double-bond modified cellulose; carrying out hydrothermal reaction on titanium sulfate, the carboxylated multi-walled carbon nanotube, ammonium fluoride and cerous nitrate to prepare a co-doped titanium dioxide / carbon nanotube; coating the co-doped titanium dioxide / carbon nano-tubes with oleic acid to prepare modified nano-particles; and reacting the double-bond modified cellulose with the cyclodextrin inclusion compound, and then copolymerizing with the modified nanoparticles and the comonomer to obtain the plant-based deodorant. The prepared plant-based deodorant has the advantages of good deodorization effect, slow release and photocatalytic degradation.

The invention relates to the technical field of medical materials, and discloses a chitosan spunlace degradable medical dressing base material and a preparation method thereof. Comprising the following operation steps that chitosan fibers, modified cellulose and viscose fibers are subjected to opening treatment and then mixed to be uniform, carding is conducted through a carding machine to form a net, cross laying is conducted, and a fiber net is obtained; performing spunlace reinforcement on the fiber net by adopting a flat net spunlace machine to obtain the chitosan spunlace non-woven fabric; carrying out vacuum defoaming on the spinning solution and then putting the spinning solution into a propulsion pump; the chitosan spunlace non-woven fabric is fixed to a collector for electrostatic spinning and drying, then the chitosan spunlace non-woven fabric is soaked in a zinc acetate ethanol solution for ultrasonic treatment for 5-10 min, ethanol cleaning, drying, cutting and packaging are conducted, and the chitosan spunlace degradable medical dressing base material is obtained.

The invention discloses an environment-friendly automobile decoration material containing a bio-based material and a preparation method of the environment-friendly automobile decoration material, belongs to the technical field of preparation of environment-friendly materials, and aims at solving the technical problem that the environment-friendly performance and flame-retardant performance of a decoration material in the prior art need to be further improved. The flame-retardant polyurethane material specifically comprises the following components in parts by weight: 40-60 parts of mixed polyol, 15-25 parts of flame-retardant cellulose, 35-45 parts of isocyanate and 10-15 parts of an auxiliary additive. According to the preparation method, biomass-containing mixed polyol is prepared through esterification reaction, modified cellulose is prepared through acid treatment, alkali treatment and esterification reaction, the modified cellulose is combined with the modified cellulose through covalent bonds, flame-retardant cellulose is obtained, the environment-friendly performance and flame-retardant performance of the decorative material are improved, and the mechanical strength of the decorative material is also improved.

The invention provides a preparation method of a cellulose-based water-induced deformation and color-changing film. Water-induced deformation and color-changing response are realized synergistically. The film is mainly prepared from the following components in parts by weight: 16.67 to 25 parts of hydrophilic micelle, 33.33 to 50 parts of absolute ethyl alcohol, 10 to 16 parts of modified cellulose, 12.5 to 20 parts of cross-linking agent and 2.5 to 4 parts of red dye. The cellulose-based water-induced deformation and color-changing film can realize deformation and color-changing response at the same time, the water absorption rate and the water absorption capacity of the two surfaces of the film are regulated and controlled by utilizing the content difference of hydrophilic micelles in the upper surface and the lower surface of the film, and the water-induced deformation response of the film is realized. Meanwhile, after the thin film absorbs water and swells, the microstructure arrangement in the thin film is changed due to the increase of the volume, so that incident light generates a stronger scattering effect in the material, and the hydrochromic behavior of the thin film is realized. The cellulose-based water-induced deformation and color-changing film has synergistic deformation and color-changing response to water stimulation, and has great application potential in the fields of actuators, wearable electronic equipment, intelligent robots and the like.

The invention relates to the field of water environment pollution treatment, in particular to a bimetal MOF modified cellulose derived carbon aerogel catalyst as well as a preparation method and application thereof. The method comprises the following steps: 1) dissolving a transition metal salt and an organic ligand in an organic solvent to prepare a bimetallic MOF precursor solution; 2) dissolving a cellulose derivative in water, and treating to prepare cellulose aerogel; (3) immersing cellulose aerogel into the precursor solution, and carrying out in-situ growth to prepare MOF modified cellulose gel; and 4) carrying out carbonization treatment on the modified cellulose gel to prepare the bimetallic MOF modified cellulose-derived carbon aerogel catalyst. The catalyst has extremely high physical and chemical stability, meanwhile, the catalytic performance of the catalyst is effectively improved by means of mechanisms such as bi-metal synergism, graded electron transfer and high-dispersion active sites, and the catalyst can be effectively used for effective and efficient catalytic degradation of organic pollutants in a water body and is beneficial to separation and recovery.

The invention discloses a pyridine quaternized cellulose derivative and a preparation method thereof, and belongs to the field of modified cellulose derivatives. According to the method, sodium carboxymethyl cellulose is taken as a raw material, and a target product is prepared through a three-step method of epoxy group grafting, sulfydryl-epoxy click chemical reaction and pyridine quaternization reaction in sequence. According to the method, the high efficiency of click chemistry and the modular design concept are innovatively introduced into the field of cellulose derivative modification, the problems that a traditional quaternization method is uncontrollable in substitution degree, many in side reaction and poor in molecular design flexibility are solved, and the method has the advantages of being mild in reaction condition, high in efficiency and clear in product structure.

This invention provides a solid waste-based backfill material for improving heavy metal leaching rate and its preparation method. The backfill material comprises the following raw materials in parts by weight: 40-60 parts Bayer red mud, 40-60 parts fly ash, 10-20 parts desulfurized gypsum, 5-8 parts nano-hydroxyapatite, 4-6 parts pumping agent, and 30-60 parts water. The pumping agent is a compound of organosilicon polycarboxylic acid water-reducing agent, polymaleic acid, and thiol-modified cellulose in a mass ratio of 4-6:3:10-12. The thiol-modified cellulose is prepared by a method including the following steps: dissolving carboxymethyl cellulose in water, adding aminothiol compounds, adjusting the pH, adding activators and activating aids, and reacting under controlled temperature. After the reaction, acetone is added until no precipitation occurs. The mixture is then filtered, washed, and dried to obtain thiol-modified cellulose. The heavy metal leaching performance of the backfill material is improved by introducing hydroxyapatite, which can both precipitate and adsorb heavy metals.

The invention discloses modified cellulose nanofiber reinforced bi-crosslinking immunoregulation hydrogel as well as a preparation method and application thereof, and belongs to the technical field of biological materials and biomedical engineering. Oxidized sodium alginate and dopamine grafted gelatin are adopted to prepare a main body of the composite hydrogel, aldehyde groups on the oxidized sodium alginate and amino groups on the gelatin can form Schiff base bonds, and borax, the oxidized sodium alginate and vicinal diol structures on modified cellulose nanofibers can form boric acid ester bonds. The double-crosslinking structure enhances the mechanical property of the hydrogel. The borate bond and the Schiff base bond are both dynamic chemical bonds and can respond to pH change, so that the hydrogel is endowed with self-healing performance and pH-responsive drug release ability, the hydrogel can quickly release liposome with an anti-inflammatory function in an acidic inflammatory environment in the early stage of cartilage injury, and the hydrogel recovers to an original state after fracture caused by joint movement. And the overall stability of the hydrogel is ensured by the double-crosslinking structure.

The invention provides a special fiber material and a preparation method thereof, and belongs to the technical field of polymer composites.The preparation method comprises the following steps that cellulose and an ethanol solution are mixed, polyvinyl alcohol and a 3-glycidoxypropyltrimethoxysilane solution are added, the pH is adjusted to be acidic, heating, suction filtration and drying are conducted, and modified cellulose is obtained; mixing expanded graphite, deionized water, ammonium persulfate and dilute sulphuric acid, heating, cooling, dropwise adding amino polyethylene glycol silane, heating, washing and drying to obtain modified expanded graphite; the preparation method comprises the following steps: mixing modified cellulose, modified expanded graphite, phosphate montmorillonite, 3-(methacryloyloxy) propyltrimethoxysilane, bisphenol A diglycidyl ether and 2-methylimidazole, stirring, heating, defoaming, and carrying out two-stage constant-temperature treatment to obtain the special fiber material. The special fiber material disclosed by the invention has good flame retardance, mechanical strength, water resistance and filtering performance, and can be applied to various organic composite boards, filter membranes and the like with high quality requirements.

The invention relates to the technical field of dispersing agents, and particularly discloses a polycarboxylic acid type dispersing agent as well as a preparation method and application thereof. The preparation method comprises the following steps: polymerizing itaconic acid, 2-acrylamide-2-methylpropanesulfonic acid, glycidyl methacrylate, methyl styrene, gamma-methacryloxypropyltrimethoxysilane, the modified hybrid compound, vinyl 2-mercaptopropionate and allyl polyoxyethylene ether to obtain a polycarboxylic acid type dispersing agent; the dispersing agent has excellent dispersing performance and heat resistance, the dispersing agent is not prone to losing efficacy in the high-temperature vulcanization process in the rubber processing process, and when filler and rubber are mixed, the dispersing agent is firmly adsorbed on the surfaces of filler particles through multiple acting forces, so that the dispersing agent is not prone to losing efficacy, and the service life of the dispersing agent is prolonged. The dispersing performance of the filler and the interface bonding force with rubber are improved, so that the filler is uniformly distributed in the rubber, a stable dispersion system is formed, the mechanical property of vulcanized rubber is improved, and the processing fluidity is improved.

The invention relates to a modified cellulose additive for a coating and a preparation method thereof. The preparation method comprises the following steps: preparing titanium dioxide sol; reacting hydroxyethyl cellulose with anhydride to obtain a modified cellulose dispersion liquid; titanium dioxide sol and the modified cellulose dispersion liquid are mixed to obtain composite dispersion liquid, and fluorine-containing and silicon-containing reactive monomers and methyl methacrylate are used as monomer pre-emulsion to be polymerized in the composite dispersion liquid. The surface of cellulose is grafted with chlorinated betaine to provide antibacterial and anti-fouling properties, the prepared nano titanium dioxide sol improves the ultraviolet shielding property, and the chlorinated betaine and the nano titanium dioxide sol can realize uniform physical mixing and adsorption through intermolecular hydrogen bond acting force, hydrogen bond interaction and the like; a hydrophobic monomer prepolymer is polymerized on the surface of a compound to form a core-shell structure, so that the compactness of the composite material is further improved, a polymer chain on the surface contains rich siloxane and can be effectively compounded with resin in a coating after being added into the coating, and a water dispersion emulsion form can be compatible with various water-based resin systems and is not easy to agglomerate.

The invention discloses a water-based laminating adhesive and a preparation method thereof, and the laminating adhesive is a uniform emulsion prepared by taking a monomer, a nano filler, a cross-linking agent, an initiator, a compound additive and deionized water as raw materials through the steps of pretreatment, polymerization reaction, cross-linking modification and post-treatment. The monomers comprise a hard monomer, a soft monomer and a functional monomer; the nanofiller is a modified cellulose nanocrystal, and the cross-linking agent is a polyisocyanate cross-linking agent; the adsorption of the nanofiller on the surfaces of polymer particles is further improved through the modified cellulose nanocrystals, the peel strength is further improved by introducing the cross-linking agent, the mechanical property is improved, and the problem of'strength-toughness' contradiction in the prior art is solved.

The invention belongs to the technical field of preparation of composite fibers, and particularly relates to a preparation method of a heterocycle-containing polyamide composite fiber, which comprises the following steps: under the protection of inert gas, mixing a heterocycle-containing diamine monomer and terephthaloyl chloride in a polar solvent in proportion to prepare heterocycle-containing polyamide; mixing the amino modified cellulose nanomaterial, a tannic acid modified metal oxide and a Schiff base oligomer to form a composite dispersion liquid, adding heterocycle-containing polyamide, a lithium salt and a cross-linking agent into the composite dispersion liquid, dissolving and defoaming to obtain a spinning solution, and extruding the spinning solution into a coagulating bath through wet spinning; and carrying out multi-step washing, drying and heat setting treatment to obtain the heterocycle-containing polyamide composite fiber.

The invention relates to the field of plastic packaging bags, in particular to an antibacterial food packaging bag and a preparation process thereof. The invention discloses a preparation process of an antibacterial food packaging bag. The preparation process comprises the following steps: preparing modified nitrogen-doped carbon quantum dots; preparing modified cellulose nanocrystals and modified chitosan nanofibers; preparing a composite filler; and preparing the antibacterial food packaging bag. The preparation method comprises the following steps: firstly, preparing nitrogen-doped carbon quantum dots by taking polyvinylpyrrolidone as a raw material through a hydrothermal reaction method, then preparing salicylic acid modified chitosan by taking salicylic acid and chitosan as raw materials, and grafting the salicylic acid modified chitosan on the surfaces of the nitrogen-doped carbon quantum dots to prepare the modified nitrogen-doped carbon quantum dots. After the salicylic acid modified chitosan is mixed with linear low-density polyethylene and other raw materials to prepare a food packaging bag, the dispersity of the nitrogen-doped carbon quantum dots in a matrix can be improved through the grafting modification effect of the salicylic acid modified chitosan, antibacterial components are not prone to being lost from the matrix, and therefore the long-acting antibacterial effect is achieved.

The invention relates to composite aerogel as well as a preparation method and application thereof, and belongs to the technical field of bio-based materials, the composite aerogel is prepared from the following components in parts by mass: 2-10 parts of aldehyde modified cellulose nanocrystals, 3-10 parts of a silk fibroin solution, 5-15 parts of a genipin ethanol solution and 0.2-0.5 part of zinc chloride; the preparation method of the composite aerogel comprises the following steps: (1) uniformly mixing aldehyde modified cellulose nanocrystals, a silk fibroin solution, a genipin ethanol solution and zinc chloride, and reacting to form hydrogel; (2) adding into a mold, and freezing at constant temperature for 4-8 hours; (3) replacing water with tert-butyl alcohol; and (4) drying at normal pressure for 24-48 hours to obtain the composite aerogel. The aerogel prepared by the invention has a hierarchical pore structure and an adjustable function, has high mechanical properties, specific surface area, porosity and degradation rate, and is suitable for the fields of biomedicine, environmental protection and energy.

The invention relates to an outdoor coating composition which comprises the following components in parts by weight: a water-based acrylic emulsion, a modified cellulose additive, a coalescing agent, a wetting agent and a defoaming agent, wherein the modified cellulose additive is prepared by the following steps: firstly, preparing titanium dioxide sol; reacting hydroxyethyl cellulose with anhydride to obtain a modified cellulose dispersion liquid; titanium dioxide sol and the modified cellulose dispersion liquid are mixed to obtain composite dispersion liquid, and fluorine-containing and silicon-containing reactive monomers and methyl methacrylate are used as monomer pre-emulsion to be polymerized in the composite dispersion liquid. The modified cellulose additive disclosed by the invention integrates multiple functions of ultraviolet shielding, antibiosis, anti-pollution, reinforcement, toughening and the like, and replaces multiple traditional auxiliaries, so that the formula is simplified, and the problem of compatibility is avoided; the coating is firmly combined with coating resin through chemical bonding and physical adsorption, migration and precipitation are not prone to occurring, and the prepared coating is good in storage stability and free of layering and sedimentation phenomena; after the composition is coated to form a film, the film is compact and has good mildew resistance and weather resistance.

The invention relates to the technical field of fabric spinning, and discloses a lightweight warm-keeping polyester wadding material and a preparation method thereof. The preparation method comprises the following steps: firstly, reacting 3, 5-dihydroxybenzamide with dicarboxyl polyethylene glycol to prepare polyethylene glycol amide polyester containing acylamino and polyethylene glycol chain segments; modifying cellulose aerogel by using the polyester, and finally blending the modified aerogel and PET (Polyethylene Terephthalate) to obtain the target polyester wadding. In the polyester, an amido bond and a hydroxyl group on the surface of the cellulose aerogel can form a hydrogen bond and partial covalent crosslinking, and an ether bond is similar to a PET ester group structure, so that the dispersity and compatibility of the modified aerogel in PET can be improved, and the flexibility of the PET can also be enhanced. The cellulose aerogel is porous, loose and small in heat conductivity coefficient, air convection can be limited, a heat conduction path is prolonged, heat loss is reduced, and finally the requirements for light weight and heat preservation of the polyester wadding are met.

Provided is a grease composition containing a base oil (A), hydrophilic nanofibers (B) having a roughness (d) of 1 nm to 500 nm, and particles (C) having a structure in which the hydrophilic nanofibers (B) are one or more types selected from the group consisting of cellulose nanofibers (B1) and modified cellulose nanofibers (B2), the particles (C) having a hydrophobic group on the outermost surface of the hydrophilic matrix structure, and having a hydrophobic group on the outermost surface of the hydrophilic matrix structure. In the grease composition, the average particle diameter of the particles (C) is 1 nm to 500 nm, and the grease composition has an appropriate oil separation degree and excellent water resistance despite the use of hydrophilic nanofibers.

The invention discloses an ion locking fixed cyclodextrin cross-linked polymer functionalized cellulose-based textile material and a preparation method thereof, and the method comprises the following steps: cross-linking hydroxypropyl-beta-cyclodextrin (HP-beta-CD) by using 1, 2, 3, 4-butanetetracarboxylic acid (BTCA) to prepare a cross-linked polymer containing carboxyl / carboxylate groups, and carrying out cross-linking on the cross-linked polymer containing carboxyl / carboxylate groups to prepare the ion locking fixed cyclodextrin cross-linked polymer functionalized cellulose-based textile material. Polyphenols active molecules (such as luteolin) are clathrated and / or loaded; depositing the cross-linked polymer loaded with the active molecules on the surface of a cellulose-based textile base material which is subjected to cationization modification and has quaternary ammonium salt cationic groups on the surface through electrostatic interaction; divalent metal ions (preferably Ca < 2 + >) are further introduced to coordinate with carboxyl / carboxylate groups in the cross-linked polymer to form physical cross-linking points, so that locking and fixation of a functional layer are realized, and the release behavior of active molecules is regulated and controlled. The material has the comprehensive performance of stable fixation, washability, durability, breathability, comfort and maintenance and controllable release mode, and can be applied to application scenes such as skin contact textiles and dressing materials.

This invention relates to the field of coating technology and discloses a wear-resistant thin-film waterborne coating and its preparation method. The waterborne coating of this invention comprises 100 parts by weight of waterborne polyurethane, 5-25 parts by weight of sodium sulfonate modified cellulose, 0.6-1 parts by weight of defoamer, 3-5 parts by weight of film-forming aid, 5-8 parts by weight of pigments and fillers, and 1.4-2.3 parts by weight of dispersant. The modified cellulose contains hydrophilic groups of sodium sulfonate, which improves the water solubility of cellulose, resulting in better dispersibility in the waterborne coating, no precipitation, and excellent storage stability of the coating. Furthermore, the microcrystalline cellulose is uniformly dispersed in the waterborne coating, providing excellent reinforcement to the polyurethane film. Simultaneously, the cellulose contains rigid phenylmaleimide rings, exhibiting high structural stability and strength, which is beneficial for improving the impact resistance, hardness, and wear resistance of the coating film.

The invention discloses a chlorine-free environment-friendly bleaching agent for refined cotton. Comprising the following raw materials in parts by weight: 5-18 parts of peracetic acid, 10-30 parts of hydrogen peroxide, 5-8 parts of a sodium alginate / PEG4000 / modified cellulose nanowhisker compound, 1-5 parts of an organic acid catalyst, 0.05-0.5 part of a dipicolinic acid stabilizer, 0.01-0.1 part of a magnesium salt stabilizer, 2-10 parts of a pH buffer solution and 40-60 parts of deionized water. According to the chlorine-free environment-friendly refined cotton bleaching agent disclosed by the invention, efficient bleaching under mild conditions is realized through precise matching of a composite oxidation system and a multi-element synergistic protection system; meanwhile, the invention provides a preparation method and an application process of the bleaching agent, the bleaching agent is adaptive to the existing production line, and enterprise upgrading cost is reduced.

The invention belongs to the technical field of super-hydrophobic paper, and particularly relates to PDMS (Polydimethylsiloxane) functionalized MOFs (Metal-Organic Frameworks) modified super-hydrophobic paper as well as a preparation method and application thereof. The preparation method comprises the following steps: putting cellulose paper into a zirconium ion solution, stirring, and carrying out ultrasonic treatment; adding an organic ligand solution to obtain MOFs modified cellulose paper; the MOFs modified cellulose paper is subjected to hydrophobic modification through polydimethoxy siloxane, and the PDMS functionalized MOFs modified super-hydrophobic paper is obtained. The preparation method has the advantages of simplicity in operation and high efficiency; the super-hydrophobic paper has excellent self-cleaning performance and oil-water separation performance, can be used in the fields of transportation packaging, waterproof and moistureproof protection, offshore oil leakage cleaning and the like, and has important application value.