382results about "Cellulose coatings" patented technology

The invention discloses a cellulose coated diaphragm and a preparation method thereof in the field of lithium ion batteries, the diaphragm comprises alpha-cellulose pulp, a cellulose grafted phenylboronic acid-co-oligomeric ethylene oxide copolymer, a thermal response star zwitterionic polymer and nano aluminum oxide, and an N-methylmorpholine-N-oxide aqueous solution is adopted as a solvent system. The preparation method comprises the following steps: firstly synthesizing a cellulose grafted copolymer with dynamic borate bonds through atom transfer radical polymerization, then preparing a star polymer with thermal response arms and zwitter-ion terminals by taking cyclodextrin as a core, and finally mixing all the components to prepare coating slurry. And the composite diaphragm is prepared through the processes of coating, phase conversion, ultraviolet curing and drying. The diaphragm combines the thermal stability and lyophilic property of cellulose, forms a dynamic self-adaptive interface layer through the synergistic effect of two functional compounds, has the advantages of active safety protection, dendritic crystal inhibition, long cycle life and the like, and remarkably improves the comprehensive performance of the lithium ion battery.

The invention relates to a coating, in particular to a radiation refrigeration heat insulation coating and a preparation method thereof, and the radiation refrigeration coating comprises a water-based emulsion, a reflective inorganic filler, a radiation inorganic filler water-based emulsion, a radiation inorganic filler, functional nanocellulose and a functional additive. The radiation refrigeration coating can reflect energy of a sunlight wave band (0.3-2.5 [mu] m) and perform radiation heat exchange with the universe by utilizing an atmospheric window (8-13 [mu] m), and the cooling effect lower than the environment temperature can be achieved. In high-temperature weather in summer, the surface temperature of a building can be effectively reduced, and the use frequency of an air conditioner is reduced, so that energy consumption is remarkably reduced. Meanwhile, by adding heat insulation type inorganic filler (such as hollow glass beads, silicon dioxide aerogel and the like), the heat conductivity of the coating is reduced, the loss of heat in a building is reduced, and the heating energy consumption in winter is reduced. Due to the dual functions, the coating can achieve an energy-saving effect throughout the year, and the environment-friendly concept of energy conservation and carbon reduction is met.

The present invention provides nanocellulose that has an average fiber width of 1-200 nm and is an oxide of a cellulosic raw material, which does not contain an N-oxyl compound in a cellulose fiber, has excellent dispersion stability in a dispersion medium, and uses hypochlorous acid or a salt thereof, the nanocellulose not substantially containing an N-oxyl compound and having a zeta potential of at most -30 mV.

The invention relates to a coral cellulose / photo-thermal material composite antifouling coating and a gradient curing method thereof, and aims to solve the problems of environmental pollution, short antifouling period, lack of environmental response capability and the like in the traditional ship antifouling technology. Through the composite design of the coral cellulose and the photo-thermal material and in combination with a layered curing process, long-acting antifouling and mechanical property strengthening of the coating in a marine environment are realized.

The invention provides a preparation method of a transparent marine antifouling coating with high mechanical stability. The preparation method comprises the following steps: adding 3-glycidoxypropyltrimethoxysilane, methyltrimethoxysilane and diluted hydrochloric acid into a cellulose dispersion liquid, mixing, stirring and heating for reaction to obtain hydrophobic modified nano cellulose; the preparation method comprises the following steps: dissolving eugenol and a chain extender in a solvent to obtain a mixed solution, and adding methacryloyl chloride into the mixed solution for reaction to obtain an eugenol methacrylate monomer; the preparation method comprises the following steps: dropwise adding a eugenol methacrylate monomer, an acrylate monomer and an initiator into a solvent, and reacting to obtain an acrylic acid-eugenol copolymer; the preparation method comprises the following steps: uniformly mixing hydrophobic modified nanocellulose and an acrylic acid-eugenol copolymer to obtain a film coating solution, coating the surface of a base material with the film coating solution, and drying to obtain the transparent marine antifouling coating. The mechanical stability, transparency, hydrophobicity and antifouling property of the transparent marine antifouling coating are greatly improved, and the transparent marine antifouling coating has a wide prospect in practical application.

The invention relates to the technical field of wind power generation materials, in particular to a rubber insulating material and a sheath material for wind power generation. The rubber insulating material for wind power generation comprises an insulating inner layer, an interface transition layer and a sheath outer layer, in the rubber insulating material for wind power generation and the sheath material, through double mechanisms of chemical coupling of a plant-based diluent and nano-cellulose and physical adsorption of expanded graphite, the insulating inner layer has excellent heat resistance and mechanical strength on the basis of keeping the heat resistance and mechanical strength of the material; the processing viscosity of the epoxy resin system is reduced; the outer layer of the sheath improves the mechanical property and salt mist erosion resistance of the material through the chemical anchoring of plant fibers and resin and the barrier effect of the nanosheet layer; meanwhile, the natural latex-cellulose nanocrystalline composite network of the interface transition layer strengthens the interface compatibility of the insulating layer and the sheath layer, and avoids the interlayer separation risk, thereby improving the reliability and service life of the material in an extreme environment of offshore wind power equipment.

The invention belongs to the technical field of straw resource utilization and agricultural degradable mulching films, and particularly discloses a water absorption and retention type straw-based biodegradable spraying mulching film and a preparation method thereof.Straw short fibers and biodegradable super absorbent resin are mixed through a V-shaped mixing machine according to a certain proportion, and a homogeneous dry powder formula is prepared; the preparation method comprises the following steps: preparing an adhesive aqueous solution with a certain concentration as a liquid-phase formula, synchronously spraying the dry powder formula and the liquid-phase formula according to a certain ratio by adopting a dry powder sprayer and a water mist spraying can respectively to prepare the continuous and stable mulching film, and preparing the mulching film through simple processes such as crushing, mixing and spraying without complicated equipment. The production cost is obviously lower than that of an existing synthetic polyester / natural polysaccharide mulching film, meanwhile, the problem of environmental pollution caused by straw incineration is solved, the agricultural sustainable development requirement is met, large-scale production is facilitated, the utilization rate of agricultural water resources is increased, and the mulching film has great application potential in arid / semi-arid regions.

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 discloses a metal non-stick coating and a preparation method. The coating comprises 20-30 parts of low-melting-point glass powder, 10-20 parts of a two-dimensional material, 10-20 parts of a spherical material, 10-20 parts of a rod-like material, 5-10 parts of a high-temperature pigment and 20-30 parts of a water-based carrier. The metal non-stick coating is sintered on the base material at low temperature, and the low-melting-point glass powder is used as a cladding sealing film forming substance and is cladded on the metal base material by adopting a sintering process, so that the hardness of the coating is higher than that of metal, the coating is not afraid of being scratched by metal kitchenware and hard food materials, and the metal non-stick coating is not prone to being scratched by the metal kitchenware and the hard food materials during conventional operations such as decocting and stir-frying. The coating is not prone to falling off or oxygenolysis, the concave-convex lotus leaf structure with the microscopic surface is formed through cooperation of the two-dimensional material, the spherical material, the rod-shaped material, the high-temperature pigment, the water-based carrier and other materials, and when food is cooked, the concave-convex lotus leaf structure can reduce contact between the food and the bottom of the pan, the Leidenfrost effect is formed, and the food is prevented from sticking to the pan.

The invention relates to the field of building materials, and particularly discloses a formaldehyde-removing odor-removing home decoration coating and a construction process thereof. The formaldehyde-removing odor-removing home decoration coating comprises a putty layer and an emulsion paint layer, wherein putty is prepared from the following raw materials: water, white cement, fly ash, coarse whiting, talcum powder, hydroxypropyl methyl cellulose ether, redispersible latex powder, an organic silicon defoaming agent and a formaldehyde-removing odor-removing agent; the latex paint is prepared from the following raw materials: water, acrylic emulsion, hydroxyethyl cellulose, potassium polyacrylate, a nonionic wetting agent, an organic silicon defoaming agent, calcined kaolin, coarse whiting, titanium dioxide, texanol ester alcohol, propylene glycol and a formaldehyde-removing odor-removing agent. The formaldehyde-removing odor-removing agent is prepared from polypropylene reticular fibers, nano titanium dioxide modified diatomite and mica sheets. The preparation method comprises the following steps: treating the base layer; puttying is conducted; and brushing emulsion paint. The formaldehyde-removing and odor-removing home decoration coating has the advantage of being excellent in formaldehyde-removing and odor-removing effect.

The present application relates to an electron beam curable bio-based coating composition and a pre-coated article made therefrom. The electron beam curable bio-based coating composition comprises at least one urethane acrylate, at least one bio-based acrylate monomer, at least one nanocellulose, and optionally a first additional additive wherein the nanocellulose has a specific surface area of at least 200 m2 / g and has an aspect ratio of at least 20. The pre-coated article includes a substrate having at least one major surface; the transition layer is arranged on at least part of the main surface of the base material; and at least one electron beam curing topcoat disposed on at least a portion of the surface of the transition layer wherein the electron beam curing topcoat is formed from the electron beam curable bio-based coating composition according to the present invention.

The invention relates to a phosphorylated bacterial cellulose coating material, a preparation method and a water-based zinc battery negative electrode, bacterial cellulose is modified by ammonium dihydrogen phosphate and urea to obtain phosphorylated bacterial cellulose, the phosphorylated bacterial cellulose is added with water for dispersion and then dispensed on the surface of a zinc negative electrode, and after drying, the surface of the zinc negative electrode is modified with a phosphorylated bacterial cellulose coating. A layer of organic zinc phosphate can be generated at the junction of the coating and the zinc negative electrode to separate electrolyte from the zinc negative electrode, and meanwhile, phosphorylated fibers have stronger interaction with water molecules, so that the electrolyte can be locked. Therefore, the hydrogen evolution reaction on the surface of the zinc negative electrode and the generation of byproducts are effectively inhibited, the corrosion resistance of the water-based zinc ion battery is enhanced, and the shelf life of the battery is prolonged. Meanwhile, the deposition behavior of zinc ions can be effectively regulated and controlled by the fine network structure of the bacterial cellulose and phosphate groups on the fibers, so that the generation of zinc dendrites is inhibited, and the long cycle life of the water-based zinc ion battery is effectively prolonged.

A protective film forming agent which is used for forming a protective film on a surface of a semiconductor wafer during dicing the semiconductor wafer, which is capable of forming a protective film which allows formation of a processed groove having excellent straightness by laser irradiation, and which has excellent fluorine shielding property, and a method of manufacturing a semiconductor chip using the protective film forming agent. The protective film forming agent contains a water-soluble resin (A), a light absorbing agent (B), and a solvent(S). The water-soluble resin (A) contains a water-soluble resin (A1) having an aromatic ring and a water-soluble group. The water-soluble resin (A1) may contain a benzene ring as an aromatic monocycle.

The invention discloses a wooden furniture coating, which is prepared from the following ingredients in parts by weight: 40 to 42 parts of waterborne alkyd resin, 15 to 18 parts of modified cellulose emulsion, 5 to 8 parts of polyethylene glycol, 3 to 4 parts of nano clay, 1 to 2 parts of aerogel, 1 to 1.5 parts of sodium carboxymethyl cellulose, 9 to 12 parts of pigment and 40 to 45 parts of deionized water. The preparation method of the wood furniture coating comprises the following steps: dispersing and mixing the water-based alkyd resin, polyethylene glycol, nano clay, aerogel, sodium carboxymethyl cellulose and deionized water in proportion, putting the mixture into a wet grinding machine, adding the modified cellulose emulsion and the pigment, and grinding to obtain the wood furniture coating. The prepared wood furniture coating is high in adhesive force and wear resistance and not prone to peeling and falling off, the used raw materials are all environment-friendly raw materials, the volatile organic compounds (VOC) are low, and the influence on the body and the environment is small.

The invention discloses a preparation method of photo-thermal anti-icing / deicing slurry, the photo-thermal anti-icing / deicing slurry and application. The preparation method comprises the following steps: in the presence of a basic catalyst, mixing an aqueous dispersion of nanocellulose with a polymer-based photo-thermal material monomer for reaction to obtain a first mixed solution; and mixing the first mixed solution with a water repellent agent solution, carrying out a grafting reaction, and carrying out centrifugal washing to obtain the photo-thermal anti-icing / deicing slurry. After the slurry prepared by the method is used for forming a coating, the problem that an anti-freezing surface is difficult to maintain an anti-freezing state in a long-time use state or a low-temperature and high-humidity environment can be well solved, and in addition, the coating can realize anti-icing and deicing, water and water proofing, thermal management, ultraviolet radiation prevention, photo-thermal sterilization, oil-water separation and the like of a solid surface.

A composition, a method for manufacturing the composition, and products containing the composition are disclosed. The present composition is a dispersion comprising a plant-based wax and a fibrillated cellulose component. Additionally, a solid wet product and a use of the said composition is disclosed.

The invention relates to the technical field of diaphragms for lithium ion batteries, in particular to nano coating liquid, a preparation method of the nano coating liquid and a nano coating diaphragm. The nano coating liquid provided by the invention is prepared from the following components in parts by mass: 20 to 95 parts of large-particle inorganic powder, 5 to 80 parts of small-particle inorganic powder, 5 to 30 parts of nano cellulose, 1 to 5 parts of a solution type binder, 1 to 5 parts of an emulsion type binder, 0 to 1 part of a wetting agent and 200 to 800 parts of a polar solvent, the D50 of the large-particle inorganic powder is 0.1 to 3 [mu] m; and the D50 of the small-particle inorganic powder is 10 to 150 nm. The diaphragm prepared from the nano coating liquid provided by the invention has good heat resistance on the premise of keeping good liquid absorption capacity and air permeability.

The invention discloses a sodium-ion battery diaphragm, a preparation method thereof and a sodium-ion battery, and belongs to the technical field of sodium-ion batteries, the sodium-ion battery diaphragm comprises a glass fiber diaphragm and a modified coating coated on one side of the glass fiber diaphragm; the modified coating faces the negative electrode side of the sodium ion battery; the modified coating is prepared from the following raw materials in parts by mass: 10 parts of chitosan, 0.4 to 0.6 part of cellulose nanofiber, 0.02 to 0.04 part of cross-linking agent and 90 to 150 parts of solvent. A large number of polar groups in the chitosan can adsorb sodium ions through electrostatic interaction, so that the difference of local current density is reduced, and the growth of sodium dendrites is effectively inhibited; the cellulose nanofiber is used as a rigid filler and is compounded with the chitosan, so that a compact and uniform network structure can be formed, the mechanical strength of the diaphragm is improved, penetration of sodium dendrites is directly hindered, the pore size of the diaphragm is adjusted, uniform transmission of ions is facilitated, and the cycling stability of the sodium ion battery is improved.

The invention relates to the technical field of super-hydrophobic anti-icing coatings, and discloses a photo-thermal super-hydrophobic anti-icing coating and a preparation method and application thereof.The photo-thermal super-hydrophobic anti-icing coating is prepared from nanocellulose, MXene, dopamine and octadecylamine, and the mass ratio of nanocellulose to MXene is (0.3-1.7): 1; the mass ratio of the dopamine to the MXene is 1: (0.3 to 1.7). A coating prepared from the photo-thermal super-hydrophobic anti-icing coating has good photo-thermal conversion capacity, has good compatibility with various substrates and can be applied to icing prevention in cold weather.

The invention relates to the technical field of electromagnetic shielding materials, and particularly discloses an electromagnetic shielding composite material with active and passive infrared stealth functions and a preparation method thereof. The composite material comprises an electromagnetic wave reflecting layer and a plurality of electromagnetic wave absorbing layers. The electromagnetic wave reflecting layer is made of silver-plated bacterial cellulose, and efficient reflection of electromagnetic waves is achieved through high conductivity of the silver-plated bacterial cellulose. The electromagnetic wave absorbing layer is formed by compounding bacterial cellulose, multi-walled carbon nanotubes and core-shell magnetic nanoparticles, and the content of the multi-walled carbon nanotubes is gradually decreased and the content of the core-shell magnetic nanoparticles is gradually increased from the position close to the electromagnetic wave reflecting layer to the outside, so that a gradient structure is formed; the gradient design can improve surface impedance matching, promote electromagnetic waves to enter the material, and enhance electromagnetic loss through an interlayer multiple reflection-absorption process. The material disclosed by the invention has the functions of efficient electromagnetic shielding and active and passive infrared stealth.

The invention relates to an environment-friendly chemical-resistant high-pressure hydrogen transmission and storage coating and a preparation method thereof, and belongs to the technical field of hydrogen permeation resistance. Montmorillonite is modified by methyl dodecyl bis (hydroxyethyl) ammonium chloride, and zirconium oxide is deposited on the surface of the montmorillonite to form the composite filler. According to the composite filler, the compatibility and dispersity with a polymer matrix are remarkably improved, hydrogen molecules are effectively adsorbed and anchored by using oxygen vacancies in zirconium dioxide, and diffusion and permeation of hydrogen are further hindered. The cellulose nanocrystals are modified through stearic acid, hydrophobic groups are successfully introduced, the agglomeration phenomenon of the cellulose nanocrystals is remarkably weakened, and the dispersity and compatibility of the cellulose nanocrystals in a waterborne polyurethane emulsion are improved. The modified cellulose nanocrystals provide excellent hydrogen resistance, chemical resistance and mechanical strength for the coating, a highly compact structure is formed, hydrogen leakage is effectively prevented, pores and defects of the coating are reduced, and compactness and hydrogen resistance of the coating are improved.

Provided is a carbon nanotube dispersion liquid having excellent dispersibility. A carbon nanotube dispersion liquid, which contains at least carbon nanotubes, oxidized cellulose nanofibers, and water, and which is characterized in that the oxidized cellulose nanofibers having a fiber length of 50-250 nm account for 85% or more of the oxidized cellulose nanofibers.

The present invention is directed to a process for manufacturing a film or coating comprising high amounts of cellulosic nanomaterial. According to the present invention, a screen printing press, such as a rotary screen press, is used to create a film or coating comprising cellulosic nanomaterial. One benefit of the present process is that the suspension used in the printing process has a high dry content and high viscosity, thereby facilitating the process for manufacturing a film or coating comprising high amounts of cellulosic nanomaterial.

The purpose of the present disclosure is to provide a photoluminescent coating material composition that forms a coating film which has excellent metallic gloss and in which unevenness is unlikely to occur, when being used not only in robotic coating but also in coating using a liquid discharge head in which discharging is controlled by changing the relative distance between a valve body and a discharge port. A photoluminescent coating material composition according to the present disclosure has the following configuration. The photoluminescent coating material composition contains water, a scale-like aluminum pigment (A), and nanocellulose (B). The scale-like aluminum pigment (A) has volume mean particle diameters of d50 within a range of 0.5-8.0 μm and d90 within a range of 2.0-15.0 μm.

According to the anti-ultraviolet aging coating for the outer wall of the pipeline, the outer wall of the pipeline is coated with modified paint to form the anti-ultraviolet aging coating, and the coating thickness is 1-2 mm; the modified paint comprises the following raw materials in parts by weight: 35-40 parts of epoxy resin, 4-7 parts of an auxiliary agent, 8-12 parts of a curing agent and 30-35 parts of an acetone solvent. According to the anti-ultraviolet aging coating disclosed by the invention, the epoxy resin, the auxiliary agent, the curing agent, the reinforcing agent based on nanocellulose modification and the modifier are blended, and the modified paint prepared by matching and coordinating the raw materials is brushed on the outer wall of the pipeline, so that the prepared coating product has excellent impact resistance and adhesive force performance; the performance of the product is coordinated and balanced, and the anti-ultraviolet stability effect of the product is remarkable.

According to an example aspect of the present invention, there is provided an intumescent fire retardant composition comprising: an acid source comprising or consisting of ammonium phytate; and a carbon source selected from the group consisting of: carbohydrates, chemically modified lignins, tannin, and any combinations and derivatives thereof.

Provided is a water-soluble sheet-like coloring material in which sheets are less likely to stick to each other, have appropriate self-standing property and flexibility, and can be quickly brought into a uniform state when dissolved in water.A water-soluble sheet-like coloring material including a film-forming water-soluble polymer; a dissolution accelerator; a colorant; and a moisture-retaining agent.

The application discloses a kind of green hydrophobic light-weight bio-based composite material of wood structure imitation and preparation method thereof, comprising the following steps: plant fiber is treated by low-alkali cooking pretreatment, standby;Starch is mixed with water, then 75-95 ℃ is added with ultrasonic vibration stirring 1-2h, then adding mesophilic alpha amylase is carried out enzymolysis, after enzymolysis is completed, oxidation treatment is carried out, then urea is added to starch, stirring reaction 1-2h, finally foaming agent is added, uniformly stirred, and the foaming hot melt modified starch is prepared;Wood pulp fiber, lignin, pretreated plant fiber and foaming hot melt modified starch are mixed according to proportion, and mixed slurry is obtained;The mixed slurry is injected in injection molding machine, and the intermediate bubble layer is prepared;A layer of waterproof film containing lignin nanocellulose slurry and polylactic acid mixed solution is sprayed on the surface of the intermediate bubble layer, and the dense waterproof layer is prepared, that is, obtained.

The application discloses a mural reinforcing protective agent and a preparation method and application thereof, belongs to the technical field of cultural relic restoration, and can solve the technical problems that existing mural reinforcing materials cannot reinforce the lower layer structure of ancient murals and are prone to being attached to the surface of murals to cause the whitening of the surface pigments. The mural reinforcing protective agent comprises a bacterial cellulose carrier and Ba(OH)2 nanoparticles loaded on the bacterial cellulose carrier in situ. The application plays a reinforcing role on the lower layer structure of murals, realizes deep reinforcement of ancient murals, improves the protection effect, stability and durability, and the surface of the mural will not be whitened.