538 results about "Cellulose nanocrystals" patented technology

The invention relates to the technical field of high-barrier composite packaging films, and discloses a high-barrier composite packaging film with an antibacterial function, which sequentially comprises a base layer, a nano composite barrier layer, an antibacterial functional layer and an outer protective layer from bottom to top, and the layers are tightly attached through a coated starch-based adhesive. According to the high-barrier composite packaging film with the antibacterial function, the cellulose nanowhiskers have the characteristics of high strength and high modulus and are mixed with the bio-based polylactic acid, so that the tensile strength and tear resistance of the bio-based polylactic acid can be remarkably improved, and the structural stability of the packaging film in the using process is guaranteed; nano titanium dioxide and nano cellulose aerogel are arranged in the nano composite barrier layer, so that the barrier property of the packaging film on oxygen and ultraviolet rays can be enhanced, and the packaging film also has a certain antibacterial effect; in addition, the nanocellulose aerogel has a loose porous structure, so that gas molecules can be effectively prevented from passing through, and the barrier property is further improved.

The invention relates to the technical field of material science and engineering, and discloses a nanocellulose-based oil-water separation and adsorption composite material, which is prepared from the following raw materials in parts by mass: 35 to 45 parts of nanocellulose; 8 to 11 parts of bagasse cellulose; 10 to 15 parts of sodium lignin sulfonate; 4 to 8 parts of chitosan; 5-10 parts of oxidized starch; 5 to 8 parts of cellulose nanowhiskers; 2-5 parts of silicon dioxide nanoparticles; 0.5 to 1 part of calcium carbonate nanoparticles; 1-2 parts of a citric acid cross-linking agent; 1-2 parts of graphene oxide; 0.3 to 0.6 part of ethylene diamine tetraacetic acid; 2-5 parts of glycerol; 0.4 to 1 part of stearoyl chloride; 2-4 parts of nano iron oxide; the preparation method comprises the following steps: pretreating the raw materials, mixing the pretreated raw materials into slurry, carrying out crosslinking and ultrasonic dispersion, standing to obtain a basic mixture, injecting the basic mixture into a mold, carrying out freeze drying to form a photocatalytic layer, carrying out centrifugal dewatering, carrying out chelation reaction, spraying a composite solution, and carrying out vacuum drying to obtain the photocatalytic material. The obtained composite material has the advantages of efficient adsorption capacity, good mechanical properties, environmental friendliness, degradability and low preparation cost.

The invention discloses eutectic gel as well as a preparation method and application thereof. The eutectic gel at least comprises a polymer obtained by polymerizing an acrylamide monomer, an acrylic monomer and a cross-linking agent in a eutectic solvent, and cellulose nanocrystals are also added into the polymer. The preparation method comprises the following steps: preparing the eutectic solvent; the preparation method comprises the following steps: at least adding an acrylamide monomer, an acrylic monomer, a cross-linking agent and cellulose nanocrystals into a deep-eutectic solvent, and uniformly mixing; and carrying out polymerization reaction to obtain the eutectic gel. According to the invention, two polymer monomers with different compatibility with the eutectic solvent are copolymerized to prepare the eutectic gel with phase separation, and meanwhile, the cellulose nanocrystal with different interaction with two phases in the eutectic gel is used as the flexibilizer, so that the mechanical property of the eutectic gel is effectively enhanced, and the mechanical property of the eutectic gel is improved. And the eutectic gel has temperature and strain dual response characteristics and good environmental stability.

The invention is applicable to the technical field of daily cleaning chemicals, and provides a double-shell probiotic microcapsule which comprises probiotics, a fat-soluble plant extract, cellulose nanocrystals, a polyacrylic acid-chitosan compound, a surfactant, diisocyanate, polyethylene glycol and ethyl acetate. A wall material of the microcapsule is formed by compounding a polyacrylic acid-chitosan compound and a fat-soluble plant extract, the particle size D50 is smaller than or equal to 5 microns, the microcapsule is stable in an environment with the pH being 8-10, and the microcapsule is broken to release probiotics when the pH is smaller than or equal to 6. The outer layer is polyacrylic acid / chitosan compound / polyurethane crosslinking (pH response), the inner layer is coconut oil and soybean oil (fat-soluble core), meanwhile, the material preparation process is simple, the controllable degree is high, and the material is suitable for batch preparation.

The invention relates to the technical field of lithium ion batteries, in particular to a diaphragm material for a lithium battery and a preparation method of the diaphragm material. Comprising a base film and a modified nano TiO2 coating, the modified nano TiO2 coating is arranged on at least one side surface of the base film, and the modified nano TiO2 coating comprises the following raw materials in parts by weight: 55-80 parts of a modified nano TiO2 composite material, 8-24 parts of a binder and 2.5-7.5 parts of a dispersant; the modified nano TiO2 composite material is prepared by taking cellulose nanocrystals, lanthanum zirconate and rare earth praseodymium as modifiers and nano TiO2 as a raw material, the mass ratio of the cellulose nanocrystal to the lanthanum zirconate to the rare earth praseodymium is (1-5): (2-3): 1. By adding the modified nano TiO2 composite material and introducing nano particles into the diaphragm, a three-dimensional network structure is formed, the liquid absorption property and the ionic conductivity of the diaphragm are improved, and meanwhile, the diaphragm is high in air permeability and relatively good in mechanical property and ionic conductivity.

The invention relates to a paper substrate bio-based high-barrier Pickering emulsion coating and a preparation method and application thereof, and belongs to the technical field of paper coatings, the prepared coating has excellent waterproof and oil-proof performance and is suitable for surface coating of substrates such as paper, the emulsion is prepared by taking glycerol as a plasticizer and chitosan as an oil-proof agent, and the emulsion is prepared by taking the chitosan as an oil-proof agent. The cellulose nanocrystal is used as an emulsifier, and the alkyl ketene dimer AKD and palm wax are used as an oil phase. After the emulsion is coated on the surface of paper, a high-barrier coating with a core-shell structure is formed, and the core-shell structure is clear through electron microscope observation; the hydrophobic angle of the coating can reach 130 degrees to the maximum, and the coating shows remarkable hydrophobicity and oil resistance. The coating is composed of bio-based materials, has the advantages of environmental protection and sustainability, is suitable for application requirements of degradable and green packaging, is simple in preparation process and excellent in performance, and can provide efficient barrier performance for paper packaging materials.

The invention belongs to the technical field of stem cell biological preparations, and particularly relates to an anti-aging compound preparation based on stem cells and application of the anti-aging compound preparation in delaying skin aging. The composition is composed of an inner water phase, a middle oil phase and an outer water phase, wherein the inner water phase is prepared from the following components: stem cell exosomes, hyaluronic acid, nicotinamide ribose, trehalose, mannitol, glycine and a citric acid buffer solution; the medium oil phase is prepared from the following components: medium chain triglyceride, shea butter, vitamin E succinate, PEG (Polyethylene Glycol) modified ceramide NP and cholesterol succinic acid monoester; the external water phase is prepared from the following components: polydatin, cellulose nanocrystals and an emulsifying agent. On the basis of a W / O / W emulsion system, a multi-layer anti-aging mechanism is constructed by utilizing a three-dimensional delivery framework of an inner water phase, an oil phase and an outer water phase and space-time synergy of active ingredients, the exosome permeation efficiency is improved through microneedle introduction, and the anti-oxidation and barrier repair effects are achieved by using multiple ingredients.

The present invention provides an automotive tire containing from 0.1 wt % to 50 wt % hydrophobic nanocellulose. Hydrophobic nanocellulose may include lignin-coated nanocellulose and / or a chemically modified surface to increase hydrophobicity. The nanocellulose may include cellulose nanofibrils and / or cellulose nanocrystals. The nanocellulose may be introduced into tire components such as inner liner, body ply, sidewall, beads, apex, belts, treads, cushion gum, and textile fabric. The nanocellulose may be obtained from a biomass-fractionation process utilizing an acid catalyst, a solvent for lignin, and water to generate a lignin-containing nanocellulose precursor, followed by mechanical treatment of the nanocellulose precursor to produce the nanocellulose. For example, the nanocellulose may be obtained from the AVAP® process. The tire may further include one or more additional components derived from lignocellulosic biomass. For example, the tire may contain lignin-derived carbon black, lignin-derived antioxidants, or biomass-derived silica. The tire may also contain synthetic polymers derived from biomass sugars.

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 a preparation method of a high-performance polyacrylonitrile-cellulose nanocrystalline composite battery diaphragm, and belongs to the technical field of lithium ion battery diaphragms. The preparation method comprises the following steps: mixing cellulose nanocrystals, polyacrylonitrile and a solvent to obtain a spinning solution; and carrying out electrostatic spinning on the spinning solution to obtain the high-performance polyacrylonitrile-cellulose nanocrystalline composite battery diaphragm, the mass of the cellulose nanocrystal is 1-10% of the sum of the mass of the cellulose nanocrystal and the mass of the polyacrylonitrile; the cellulose nanocrystals are obtained by hydrolyzing sisal hemp cellulose through phosphoric acid. The polyacrylonitrile-cellulose nanocrystalline composite battery diaphragm disclosed by the invention has excellent thermal stability, mechanical property and electrolyte wettability, and has good cycle stability when being applied to a lithium ion battery. Meanwhile, the raw materials of the cellulose nanocrystals are wide in source, low in price and environment-friendly, and the production cost of the diaphragm is reduced by taking the cellulose nanocrystals as one of the raw materials.

The invention provides a microbial agent compound fertilizer for sandy land and a preparation method thereof, and relates to the technical field of compound fertilizers. The invention relates to a microbial inoculum compound fertilizer for sandy land. The soil conditioner is prepared from the following raw materials in parts by mass: 40 to 60 parts of compost, 0.3 to 0.8 part of nitrogen-fixing bacteria, 0.3 to 0.8 part of phosphate solubilizing bacteria, 0.3 to 0.8 part of potassium bacteria, 8 to 12 parts of charcoal, 8 to 12 parts of zeolite, 9 to 13 parts of perlite, 4 to 6 parts of vermiculite, 1 to 3 parts of seaweed extract, 2 to 4 parts of humic acid, 1 to 7 parts of waste cellulose nanocrystals, 30 to 40 parts of insect debris, 0.3 to 3 parts of nano carbon dots, 3 to 9 parts of lime and 8 to 15 parts of wood fiber. The compound fertilizer disclosed by the invention not only is rich in various necessary nutrient elements, but also has a good slow release effect and a good soil improvement function, can effectively improve soil fertility and promote plant growth through the action of various biological strains, and also has the characteristics of environmental protection and no pollution by utilizing the waste cellulose nanocrystals and the insect remains.

The invention discloses a controllable degradation antibacterial filament fiber and a preparation method thereof, a calcium alginate filament fiber is prepared by using a wet spinning technology, and the calcium alginate filament fiber is strongly modified by physical and chemical methods respectively. The chemical modification adopts a cross-linking agent for modification, and the physical modification adopts cellulose nanocrystal (CNC) as a reinforcing material. The tensile breaking strength is improved to 43.25 cN / dtex from 16.35 cN / dtex which is not modified, the tensile breaking strength is improved by 2.6 times, and the degradation period is prolonged to 7 days from 2 days. On the basis, berberine is introduced into the fiber, so that the mechanical enhancement effect can be further achieved by means of the electrostatic attraction effect between materials, the antibacterial performance is obtained, and the antibacterial rate can reach 95.28%.

The present invention relates to the field of plastic films, and in particular to an agricultural plastic film and a preparation method thereof. The agricultural plastic film is composed of the following components in parts by mass: 95-105 parts of film particles, 2-4 parts of modified nano-titanium dioxide emulsion, 6-10 parts of lignin nanoparticles, 2-4 parts of tannic acid, 6-10 parts of glycerol, 4-6 parts of maleic anhydride-grafted polycaprolactone as a co-solvent, and 4-6 parts of cellulose nanocrystals. Compared with the prior art, the present invention achieves comprehensive improvement in material degradability, anti-aging performance and processing efficiency, while taking into account production cost optimization and process adaptability. The agricultural plastic film can be widely used in agricultural scenarios such as greenhouse covering and soil moisture retention, has significant advantages in reducing environmental pollution and improving the comprehensive performance of agricultural films, and has broad application prospects.

The invention relates to a pegylated cellulose nanocrystal and a preparation method and application thereof, in particular to the technical field of nanomaterials, the preparation method comprises the following steps: modifying polyethylene glycol into chlorinated polyethylene glycol; carrying out alkaline treatment on the cellulose nanocrystal to enhance the activity of the cellulose nanocrystal; then mixing and reacting the polyethylene glycol cellulose nanocrystal and the polyethylene glycol cellulose nanocrystal to obtain a polyethylene glycol cellulose nanocrystal; according to the invention, polyethylene glycol is grafted on the surface of the cellulose nanocrystal through chemical reaction, so that the action mechanism of the cellulose nanocrystal is changed and enhanced, on one hand, the grafting of polyethylene glycol not only exerts the steric hindrance effect, but also enhances the characteristics (crystallinity, thermal stability and dispersity) of the cellulose nanocrystal; on the other hand, due to the existence of polyethylene glycol, the short-circuit diffusion effect and the nucleation effect can be enhanced, so that the cement hydration degree is improved; and polyethylene glycol has an internal curing effect, so that the self-constriction of the cement-based material can be reduced.

The invention provides a stabilizer for Pickering emulsion and application of the stabilizer, and relates to the technical field of Pickering emulsion preparation. The stabilizing agent for the Pickering emulsion is obtained by compounding 6 '-O-caffeoyl arbutin and cellulose nanocrystals. In specific application, the 6'-O-caffeoyl arbutin and the cellulose nanocrystals are prepared into a water phase, and then the water phase is mixed with an oil phase to prepare the Pickering emulsion. According to the preparation method, the defects in the prior art are overcome, the stability of the Pickering emulsion is effectively improved, meanwhile, the oxidation resistance effect of the Pickering emulsion is further enhanced, and the application value of the Pickering emulsion is improved.

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.

The invention relates to the technical field of liquid crystal thin films, and discloses a polymer dispersed liquid crystal thin film based on cellulose nanocrystal doping and a preparation method of the polymer dispersed liquid crystal thin film. The photoinitiator comprises the following components in parts by weight: 50-70 parts of a liquid crystal material, 20-35 parts of a matrix polymer, 0.5-2 parts of a photoinitiator, 1-5 parts of a cellulose nanocrystal composite material and 5-15 parts of a solvent. The invention further provides a preparation method of the polymer dispersed liquid crystal film based on cellulose nanocrystal doping. The method comprises the following steps: S1, preparing a cellulose nanocrystal composite solution; taking the cellulose nanocrystal composite material, and dispersing the cellulose nanocrystal composite material in a solvent; by introducing the surface-modified cellulose nanocrystal and nitrogen-doped titanium dioxide composite material into a polymer matrix, the effect of optimizing liquid crystal microdroplet distribution is achieved. Compared with a liquid crystal film which does not use the composite material, the liquid crystal film solves the problems of non-uniform liquid crystal dispersion and unstable photoelectric switching performance, and ensures more uniform optical regulation and higher light transmittance.

The invention relates to an improved conductive silver paste composition and a preparation method thereof, and belongs to the technical field of conductive material preparation, and the improved conductive silver paste composition specifically comprises the following raw materials in parts by mass: 60-70 parts of silver-coated copper powder, 12-20 parts of graphene oxide, 0.5-1.5 parts of a conductive micromolecule polymer, 5-8 parts of modified cellulose nanocrystals, 1-3 parts of an oxidant, 8-12 parts of epoxy resin and 5-10 parts of a diluent. Wherein the conductive micromolecule polymer is obtained by reacting aniline, benzaldehyde and pyruvic acid; the modified cellulose nanocrystals are obtained by modifying carboxylated cellulose nanocrystals with dopamine hydrochloride. The prepared conductive silver paste realizes collaborative optimization of conductivity, mechanical properties and process suitability through a composite system of silver coated copper, graphene oxide, conductive polymer and epoxy resin, has high cost performance and high performance, and is suitable for the fields of photovoltaics, flexible electronics, automotive electronics and the like.

The invention belongs to the technical field of marine anti-drag materials, and particularly relates to a porous anti-drag coating and a preparation method thereof.The method comprises the steps that a substrate is coated with a mixed solution of natural polymers, cellulose nanocrystals, a two-dimensional nanomaterial and water and then soaked in a metal salt solution for a certain time, and a cross-linked coating is formed; the preparation method comprises the following steps: taking out the porous cross-linked coating, treating the porous cross-linked coating by using a directional freezing casting technology, soaking the porous cross-linked coating in an organic-inorganic mixed solution for a certain time, removing inorganic salt in the porous cross-linked coating after taking out the porous cross-linked coating, and performing hot pressing on the porous cross-linked coating to obtain the porous anti-drag coating. The organic-inorganic mixed solution is obtained by mixing a silane coupling agent, an inorganic precursor, inorganic salt, an adhesive polymer and an organic solvent. The finally obtained porous anti-drag coating has the characteristics of hardness and softness, rough surface, good mechanical stability, obvious micro vortex and excellent anti-drag performance.

The invention provides an aromatic essential oil composition as well as a preparation method and application thereof. The aromatic essential oil composition comprises the following raw materials in percentage by weight: 8-12% of wormwood essential oil, 0.5-2% of cedar essential oil, 0.5-2% of tea tree essential oil, 1-2.5% of lavender essential oil, 1-2.5% of sweet orange essential oil, 75-90% of base oil and 1-5% of a modifier which is tea cellulose nanocrystals. The tea cellulose nanocrystal is used as a modifier, so that the stability of the aromatic essential oil is enhanced, the volatilization of the aromatic essential oil is delayed, the utilization efficiency is improved, and the service time is prolonged, thereby widening the application range of the aromatic essential oil composition containing wormwood essential oil in aromatherapy.

The invention discloses a grouting material based on coal gangue and a preparation method of the grouting material. The preparation method comprises the following steps: pretreating the coal gangue; uniformly stirring the pretreated coal gangue, cement and a novel magnesium expanding agent to obtain a first dry mixture; adding a polycarboxylic acid high-performance water reducing agent and cellulose nanocrystals into the first dry mixture, and uniformly stirring to obtain a second dry mixture; adding latex powder and a coupling agent into the second dry mixed material, and uniformly stirring to obtain a third dry mixed material; adding polyacrylonitrile fibers into the third dry blend, and uniformly stirring at a low speed to obtain a fourth dry blend; and mixing and stirring the fourth dry mixture and water to obtain the grouting material based on coal gangue. The pretreated coal gangue is used as the raw material, and the overall performance of the grouting material can be improved.

The invention discloses a preparation method of a pesticide droplet stabilizer based on corncobs, and in order to realize high-value utilization of the corncobs, the method mainly comprises the following steps: pretreatment of the corncobs, acquisition of corncob cellulose, extraction of cellulose nanocrystals, and extraction of cellulose nanofibers. Characterization of a corncob nanofiber stabilizer and preparation and testing of a corncob-based pesticide droplet stabilizer. The natural cellulose nanocrystals and cellulose nanofibers can be successfully extracted from the corncobs through the method, and the method can be applied to stabilization of pesticide liquid drops and stabilization of the pesticide liquid, which is of great significance to high-value utilization of the corncobs and stabilization of the pesticide liquid.

The invention belongs to the technical field of self-repairing materials, and particularly relates to a double-microcapsule self-repairing waterborne polyurethane material and a preparation method thereof. Comprising the following steps: ultrasonically dispersing cellulose nanocrystals in deionized water to form a water phase, adding drying oil and lauryl sodium sulfate, and stirring to obtain the drying oil microcapsule taking Pickering emulsion as a template. Preparing a polyvinylpyrrolidone aqueous solution, a non-polar solvent solution of thiophene monomers and an ammonium persulfate aqueous solution; and mixing and ultrasonically dispersing the two, mixing with an ammonium persulfate aqueous solution, stirring and polymerizing to obtain a polythiophene microcapsule suspension after the reaction is completed, centrifuging until the supernatant is colorless, and washing and drying the solid to obtain the polythiophene microcapsule. And finally, adding the two microcapsules into waterborne polyurethane, uniformly mixing, and drying at room temperature to form the double-microcapsule self-repairing waterborne polyurethane material. According to the invention, the self-repairing and mechanical property improvement of the double-microcapsule self-repairing waterborne polyurethane material under room-temperature natural light are realized.

A method of adsorbing a dye from an aqueous solution including contacting a composition with the aqueous solution. At least a portion of the dye adsorbs to the composition. The composition includes biochar, cellulose nanocrystals, and a layered double hydroxide (LDH). The LDH includes Cu and Fe. Particles of the LDH and the biochar at least partially cover an outer surface of the cellulose nanocrystals.

The invention discloses a hydrogel-based helicobacter pylori killing medicine and a preparation method thereof in the technical field of biomedical materials, and the hydrogel medicine adopts a shell-core layered structure and comprises an outer layer and an inner layer; the outer layer is a high-density cross-linked polyethylene glycol diacrylate network, and cellulose nanocrystals modified by silane are dispersed in the polyethylene glycol diacrylate network; pH-sensitive Schiff base bonds and / or boric acid ester bonds are embedded in the inner layer, and an antibacterial agent is loaded on the inner layer. Structural expansion and breaking of the hydrogel are controlled through a multi-layer structure, multiple loaded antibacterial agents are released according to pH response, the influence of drug resistance is avoided through sterilization of multiple mechanisms, the preparation process and device of the hydrogel drug are integrated, the production cost is reduced, and the clinical conversion efficiency is guaranteed.

The invention relates to a flame-retardant anti-dripping TPU (thermoplastic polyurethane) film and a preparation method thereof. The flame-retardant anti-dripping TPU film comprises the following raw materials in parts by weight: 80-100 parts of TPU particles, 10-12 parts of a flame retardant, 12-20 parts of flame-retardant filler and 0.01-1 part of cellulose nanocrystals, and the flame-retardant filler comprises polyhedral oligomeric silsesquioxane and acid modified montmorillonite. The flame-retardant anti-dripping TPU film prepared by the invention is good in flame retardant property, not easy to drip and safer to use.

The invention aims to provide bio-based modified CNC-Pickering emulsified asphalt and a preparation method thereof, and belongs to the technical field of modified emulsified asphalt. Comprising the following components in parts by mass: 45 to 55 parts of matrix asphalt, 45 to 55 parts of deionized water, 1 to 5 parts of cellulose nanocrystal, 0.5 to 1 part of gamma-aminopropyltriethoxysilane, 0.5 to 1.5 parts of sophorolipid, 0.1 to 0.3 part of sodium citrate, 0.1 to 0.3 part of sodium tripolyphosphate, 0.5 to 2 parts of polyvinyl alcohol, 0.1 to 0.3 part of xanthan gum and 0.05 to 0.1 part of butylated hydroxytoluene. The cellulose nanocrystal and Pickering emulsification technology are combined, so that the stability of the emulsified asphalt can be improved, the ageing resistance, high temperature resistance and low temperature resistance of the emulsified asphalt can be improved, and the high-performance requirement of road engineering on the emulsified asphalt can be met.

The invention relates to the technical field of conductive materials, and discloses a flexible conductive composite material and a preparation method and application thereof. The flexible conductive composite material comprises the following preparation raw materials: a thermoplastic elastomer, a conductive filler, cellulose nanocrystals, an inorganic salt, an organic solvent and water. According to the flexible conductive composite material provided by the invention, the Pickering emulsion is co-stabilized by the cellulose nanocrystal auxiliary conductive filler, the cellulose nanocrystal raw material is easy to obtain, biodegradable, environment-friendly and pollution-free, the Pickering emulsion is good in stability, the conductive filler is directionally enriched on an emulsion interface to form a continuous path, the bottleneck of filler dispersion is broken through, a conductive network structure is complete, and the stability of the Pickering emulsion is improved. The strain sensing response is sensitive, reversible circulation is achieved, the conductive interval is wide, the conductive seepage threshold value is about 1 wt%-2 wt%, when the addition amount of the conductive filler is 10 wt%, the conductivity is about 25 S / cm, and the conductivity is improved in a breakthrough mode.

The present disclosure relates to a separator for an electrochemical device and an electrochemical device including the same, and particularly, to a separator for an electrochemical device, which can reduce the weight of the separator, can improve the energy density of a battery, and can enhance stiffness because cellulose nanocrystals are included in a porous polymer base, and an electrochemical device including the same.