160results 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 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.

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.

The invention relates to the technical field of antirust coatings, in particular to a water-based environment-friendly antirust coating for a metal surface and a preparation method of the water-based environment-friendly antirust coating. The water-based environment-friendly antirust coating is prepared from the following raw materials in parts by weight: 35 to 45 parts of a novel water-based polyurethane solution, 13 to 17 parts of novel nano cellulose, 15 to 20 parts of an antirust pigment, 3 to 6 parts of silicon dioxide, 1.5 to 2.5 parts of a dispersing agent, 0.5 to 1.5 parts of a defoaming agent, 1.5 to 2.5 parts of a thickening agent, 2 to 4 parts of diethylene glycol butyl ether and 15 to 20 parts of deionized water. The water-based environment-friendly anti-rust coating is an environment-friendly high-performance coating, metal protection is achieved through the synergistic effect of physical barriers and chemical protection, a compact and continuous organic coating is formed on the metal surface, moisture, oxygen and corrosive media are effectively isolated, an electrochemical corrosion path is blocked, anti-rust pigment migrates to a metal interface in the coating, and the anti-rust effect is good. A chemical reaction with an iron matrix is carried out to generate an indissolvable passive film, so that the cathode reaction is inhibited and the corrosion rate is reduced.

The utility model provides a glucose biosensor, and relates to the technical field of medical detection. The glucose biosensor comprises a sensing module, a circuit board and a charging wire; a microprocessor, a rechargeable battery and a charging connection structure are arranged on the circuit board; the charging connection structure comprises a first composition part and a second composition part; the first composition part is fixedly arranged on the circuit board and is electrically connected with the rechargeable battery; the second component part is rotatably and electrically connected with the first component part; one end of the charging wire is provided with a connecting part, and the other end is provided with a seat body; the connecting part is detachably and electrically connected with the second composition part; and a solar charging panel and a wireless charging coil are arranged on the seat body. The glucose biosensor has multiple charging modes, when a user goes out and the like, charging of the glucose biosensor can be achieved through the solar charging function or the reverse charging function of equipment such as a mobile phone, and therefore the endurance of the glucose biosensor is guaranteed.

The embodiment of the invention provides colorful wall art paint for an inner wall and a preparation method of the colorful wall art paint. The colorful wall art paint for the inner wall comprises the following components in percentage by mass: 48%-52% of basic paint, 28%-32% of a dispensing solution and 18%-22% of a continuous phase, wherein the basic paint is prepared from the following components in parts by weight: 1 to 1.1 parts of first cellulose, 1.8 to 2.0 parts of tourmaline powder, 1.6 to 1.7 parts of first solvent, 10 to 10.2 parts of pigment and filler, 24 to 26 parts of pure acrylic emulsion, 7 to 8 parts of 10 percent protective rubber powder solution, 0.15 to 0.2 part of dispersing agent, 0.7 to 0.8 part of first sterilizing agent, 0.4 to 0.5 part of first defoaming agent, 0.1 to 0.15 part of pH value regulator and 50 to 52 parts of deionized water; the dispensing glue solution is prepared from the following components in parts by weight: 0.1 to 0.15 part of second cellulose, 0.3 to 0.35 part of second bactericide, 40 to 45 parts of 10 percent protective glue powder solution and 54.5 to 59.6 parts of deionized water. According to the colorful wall art paint for the interior wall and the preparation method of the colorful wall art paint, provided by the embodiment of the invention, anions can be released while a decoration effect is achieved, so that air is effectively purified.

The invention discloses biomass-based water-solid plastic as well as a preparation method, a water-solid forming method and application thereof, and belongs to the field of plastics, the water-solid plastic is plastic which can be subjected to self-deformation forming only by using water without using a mold, and the obtained shape can be kept stable and is not influenced by water environment and humidity change. The water-solid forming method mainly comprises the following steps: pre-designing the shape of the biomass-based water-solid plastic, performing water treatment, and performing drying treatment after deformation. The water-curable plastic can be automatically deformed into various one-dimensional, two-dimensional or three-dimensional shapes, no mold is needed, expensive and complex instruments and equipment are not needed, and the method is a plastic forming processing method which is simple to operate, low in energy consumption, low in cost, green, environment-friendly and carbon-reducing. The biomass-based water-solid plastic is prepared from biomass which is rich in reserves, low in cost, sustainable to regenerate, biodegradable and good in biocompatibility, has good mechanical properties and can be widely applied to various fields.

The present invention provides materials and composite materials comprising layer (A) comprising afirst polysaccharide which has been derivatised to comprise fatty acid ester moieties. Also provided are substrates coated with the material and composite material, and processes for preparing the material, composite material and coated substrate.

The invention discloses a coal dust suppressant as well as a preparation method and application thereof. The coal dust suppressant is composed of a component A and a component B which are stored separately, the component A is in a liquid state, the component B is in a solid state, and the mass ratio of the component A to the component B is (1-5): 1; the component A is composed of 10-60 parts by mass of polyacrylic resin and 0.1-3 parts by mass of a stabilizer, and the component B is composed of 3-10 parts by mass of a pigment, 4-12 parts by mass of fiber particles and 0.5-3 parts by mass of a thickener; wherein the mass of the fiber particles is 1-2 times that of the pigment; the length of the fiber particles is 0.2-2.0 mm, and the particle size of the pigment is 800-1200 meshes. The dust suppressant disclosed by the invention realizes a direct color development effect on the surface of coal for the first time. Meanwhile, the dust suppressant has excellent adhesion and dust suppression performance, and the wind erosion rate of the dust suppressant under blowing erosion at the wind speed of 30 m / s and 40 m / s is smaller than 1.0.

To provide an emulsion composition excellent in stability of an emulsified state.SOLUTION: The emulsion composition contains the following components (A), (B), (C), (D) and (E): (A) anionically modified cellulose fibers; (B) an organic compound having a cationic functional group; (C) an organic compound which is liquid at 1 atmosphere and 25°C (excluding the components (B) and (D)); (D) a polymer compound which has an anionic functional group and in which a counter cation is one or more selected from the group consisting of an ammonium ion and organic ammonium ions; and (E) water.SELECTED DRAWING: None

In some embodiments, a dispensable suspension composition can include a liquid carrier, silver (Ag) particles, silver chloride (AgCl) particles, and cellulose nanofibers. The dispensable suspension composition can be used to effectively fabricate electrodes via microdispensing. Such Ag / AgCl electrodes can be used as a reference electrode or an indicating electrode in electrochemical sensing systems. Accordingly, Ag / AgCl electrodes formed from the dispensable suspension and sensors using the same are provided, as well as methods of fabricating Ag / AgCl electrodes using the dispensable suspension. Other aspects including the dispensable Ag / AgCl suspension composition are disclosed.

The present invention is directed to a film or coating comprising a fiber material, wherein at least 60% by weight of said fiber material is microfibrillated cellulose, said film or coating also comprising at least 1% by weight of extractives from wood bark or cork wood. The invention is also directed to products, such as packaging materials, using or incorporating said film or coating. Such packaging materials are for example laminates or multi-layer structures. The films or coatings according to the present invention having advantageous barrier properties and are therefore particularly suitable for sensitive objects that need to be packaged in a controlled or modified atmosphere. The present invention is also directed to a composition comprising a fiber material, wherein at least 60% by weight of said fiber material is microfibrillated cellulose, said composition also comprising at least 1% by weight of extractives from wood bark or cork wood. The composition is useful for example in the preparation of the film or coating.

The application 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 reflection layer and a multilayer electromagnetic wave absorption layer. The electromagnetic wave reflection layer is silver-plated bacterial cellulose, and high-efficiency electromagnetic wave reflection is realized by utilizing the high conductivity of the silver-plated bacterial cellulose. The electromagnetic wave absorption layer is composed of bacterial cellulose, multi-walled carbon nanotubes and core-shell magnetic nanoparticles, and from the side close to the electromagnetic wave reflection layer to the outside, the content of the multi-walled carbon nanotubes decreases, and the content of the core-shell magnetic nanoparticles increases, so that a gradient structure is formed; the gradient design can improve the surface impedance matching, promote the electromagnetic wave to enter the material interior, and enhance the electromagnetic loss through the interlayer multiple reflection-absorption process. The material has the functions of high-efficiency electromagnetic shielding and active and passive infrared stealth.

The invention relates to the technical field of printing coatings, and provides a transfer printing coating and a preparation method thereof. The preparation method comprises the following steps: S100, performing esterification reaction on starch under an alkaline condition to obtain esterified starch; carrying out pre-crosslinking treatment on the esterified starch and a first crosslinking agent to obtain modified functional starch; s200, carrying out mechanical pretreatment and chemical functionalization treatment on the cellulose raw material to obtain functionalized nano cellulose hydrogel; and S300, mixing the modified functional starch, the functionalized nanocellulose hydrogel and a second cross-linking agent to obtain the transfer printing coating. After being subjected to pre-crosslinking treatment, the modified functional starch has better stability and shear degradation resistance, and meanwhile, the rheological properties required by gelatinization and coating are reserved; after the nano cellulose is subjected to surface functionalization, the dispersity is improved, the interfacial compatibility is improved, and a mechanical enhancement and blocking network is provided, so that a coating film has high transfer efficiency and good surface smoothness in the transfer printing process.

The present invention relates to a self-cooling nanoceramic additive in the form of an aqueous dispersion comprising emissive and reflective minerals. Said additive of the present invention is used to produce self-cooling architectural paints (single-layer coatings). The specific composition of the additive efficiently reflects sunlight, reduces heat absorption, emits thermal radiation, improves the durability of protected surfaces, reduces power consumption for cooling, and provides a formulation that is compatible with various solvents and materials, thereby facilitating its application on architectural coatings.

This application relates to an anti-icing coating, its preparation method, and its application, belonging to the field of protective coating technology. The anti-icing coating comprises a superhydrophobic self-cleaning coating and a hydrophobic and oleophobic layer stacked together. The superhydrophobic self-cleaning coating includes first SiO2 nanoparticles and fluorosilane. The hydrophobic and oleophobic layer includes second SiO2 nanoparticles, nanocellulose, chitosan nanoparticles, and a binder. The use of natural polymer materials such as nanocellulose and chitosan nanoparticles in the hydrophobic and oleophobic layer results in lower cost and better environmental friendliness. The superhydrophobic self-cleaning coating achieves superhydrophobic properties through the synergistic effect of a nano-dispersion system and a "papillary" micro-nano rough structure. The hydrophobic and oleophobic layer further enhances the coating's hydrophobic and oleophobic properties and surface lubricity, significantly reducing the adhesion of ice to the coating surface.

The application discloses a kind of all-cellulose-based photonic crystal films, with regenerated cellulose film (stretching / without stretching) as base material, cellulose nanocrystal is coated on its surface, and after self-assembly, all-cellulose-based photonic crystal film is formed, so that it has excellent flexibility and can be bent and folded, and also effectively maintains the structural color of cellulose nanocrystal;The prepared all-cellulose-based photonic crystal film can also adjust its left-handed and / or right-handed.Innovatively, a flexible photonic crystal film composed entirely of cellulose is prepared, and the all-cellulose-based flexible film has advantages such as ecological friendliness and sustainability, and meets the application of biocompatibility and biodegradability.

The invention provides a bacterial cellulose-based holocellulose multi-scale film as well as a preparation method and application thereof. The bacterial cellulose based holocellulose multi-scale film is composed of bacterial cellulose nanofibers and cellulose micron fibers subjected to phosphorylation treatment, and the cellulose micron fibers subjected to phosphorylation treatment account for 18%-55% of the bacterial cellulose based holocellulose multi-scale film by mass. The mass ratio of phosphorus contained in the cellulose micron fibers subjected to phosphorylation treatment is at least 5%, the bacterial cellulose has a three-dimensional nano network, and the cellulose micron fibers subjected to phosphorylation treatment wind and penetrate through the three-dimensional nano network to jointly form a micron-nano multi-scale composite network. The bacterial cellulose-based holocellulose multi-scale film provided by the invention has the characteristics of high strength, high toughness, high light transmittance, high haze, flame retardance and the like, can be completely degraded, and is a powerful competitor of traditional non-degradable plastic films in the market.

The invention discloses a method for manufacturing a barrier film comprising highly refined cellulose, the method comprising the steps of: a) providing a web comprising at least 50 % of highly refined cellulose having a Schopper-Riegler (SR) value in the range of 80 – 100, which web has a density in the range of 700-1500 kg / m3, and a wet tensile strength retention (MD) of less than 15%, b) applying an aqueous-based solution or dispersion comprising a polymer on the web, which aqueous based solution or dispersion has a solid content of between 5 – 50 wt%, and c) drying the web applied with the aqueous-based solution or dispersion to a solid content of at least 80 wt%, thereby forming the film.

The application belongs to the technical field of food packaging materials and surface modification, and discloses a full-biobased degradable super-hydrophobic composite coating as well as a preparation method and application thereof. The composite coating comprises a first coating, which is a dry solidified layer of a composite dispersion liquid containing corn protein, inorganic nanoparticles and bacterial cellulose; and a second coating formed on the surface of the first coating, which is a solid film layer after volatilization of a solvent of a hot wax solution. The core component of the application is derived from natural biomass, which fundamentally eliminates the use of traditional paper cup plastic film coating or fluorine-containing chemicals, and realizes full-biobased, rapid degradable and environment-friendly coating. The static water contact angle of the obtained coating is greater than 150°, and the rolling angle is less than 10°, which reaches the super-hydrophobic standard. The simple solution blending and coating process provides a reliable and highly industrialized solution for the development of green paper cup products, and has a wide application prospect.

The invention discloses a high-strength flame-retardant plastic hollow plate and a preparation method thereof. The hollow plate comprises a core honeycomb layer, an interface enhancement layer and an outer flame-retardant surface layer. The core honeycomb layer is made of 70-85 wt% of polypropylene and 15-30 wt% of a carbon fiber reinforced material, honeycomb-shaped pores are formed through extrusion, and high strength and light weight are provided. And the interface enhancement layer adopts a nano-crystalline cellulose whiskers-ZIF-8 composite system, so that the interlayer binding force is enhanced. The preparation method comprises the steps of extrusion molding of the core layer, preparation of an interface enhancement layer solution through ultrasonic dispersion, melt blending of the outer flame-retardant surface layer, hot-press compounding and annealing post-treatment. The total thickness of the product is 10-20 mm, the bending strength is 52.3-58.4 MPa, the LOI is 29.5-31.8%, the UL-94 V-0 grade is reached, and the product is suitable for high-requirement scenes such as buildings and packaging.

The present invention relates in particular to an adhesive composition comprising i) microfibrillated cellulose and ii) at least one metal in oxidation state II or higher. The invention further relates to the use of such an adhesive composition and to products produced using such an adhesive composition. Furthermore, the invention relates to a method for producing corrugated paperboard or cardboard or solid paperboard or cardboard by using such an adhesive composition.

The present invention relates to the provision of an aqueous emulsion composition for producing a film showing slippery properties containing hydrophobically modified cellulose fibers and at the same time improving water resistance and durability of the film. Since the emulsion composition of the present invention is capable of forming a film having slippery properties, which can be utilized on various surfaces, for example, those in the fields of coatings for ships and bridges, cosmetics, and the like.

The present invention relates to microfibrous cellulose capable of exhibiting an excellent dispersibility stability and an excellent coating suitability when added to paint.To this end, the present invention provides fibrous cellulose having a fiber width of 1,000 nm or less and containing an ionic substituent. An amount of the ionic substituent in the fibrous cellulose is 0.10 mmol / g or more and 1.50 mmol / g or less. A polymerization degree of the fibrous cellulose is 150 or more and 515 or less. When the fibrous cellulose is dispersed in a dispersion solvent containing water and isopropanol to obtain a dispersion fluid having a 7:3 mass ratio of water and isopropanol and a viscosity of 2,500 mPa·s at 23° C., and the dispersion fluid is stirred under predetermined stirring conditions, a viscosity change rate falls within ±50% as calculated by the following formula:viscosity change rate (%)=(viscosity after stirring−viscosity before stirring) / viscosity before stirring×100 .

The application provides a composite film packaging film, which comprises an inner layer, an intermediate layer and an outer layer, the inner layer comprises polyethylene; the intermediate layer comprises ethylene-vinyl alcohol copolymer, and the intermediate layer is at least partially covered on the inner layer; the outer layer comprises polyethylene, cellulose and hemicellulose, and the outer layer is at least partially covered on the intermediate layer; wherein the inner layer and the intermediate layer and the intermediate layer and the outer layer are combined through an adhesive; and the intermediate layer is provided with at least one layer. The composite film material of the application shows superior performance in barrier property, moisture resistance, mechanical strength and environmental protection performance through the design of the multi-layer structure, and is suitable for the packaging of oxygen-sensitive products, can provide good physical protection, and meets the environmental protection requirements.

A carbon nanotube dispersion may have excellent dispersibility. Such a carbon nanotube dispersion may include at least carbon nanotubes, oxidized cellulose nanofibers, and water, wherein, of the oxidized cellulose nanofibers, 85% or more of the oxidized cellulose nanofibers have a fiber length of 50 nm to 250 nm.