94results about "Cellulose adhesives" patented technology

The invention belongs to the technical field of adhesives, and particularly relates to a preparation method of a polysaccharide-based reversible bonding adhesive for constructing a dynamic covalent bond network. The preparation method comprises the following steps: by taking lipoic acid and sodium alginate as reactants and ferric chloride as a cross-linking agent, carrying out cross-linking reaction under a stirring condition to obtain a lipoic acid adhesive, namely the polysaccharide-based reversible bonding adhesive. According to the invention, renewable biomass resources such as sodium alginate, hyaluronic acid, chitosan and the like are used as main raw materials, so that the adhesive is expected to replace a traditional synthetic adhesive depending on a petroleum base, accords with a sustainable development strategy, contributes to reducing consumption of fossil resources, avoids release of toxic substances such as formaldehyde and the like in the synthesis and use processes, and has a good application prospect. And the method is more environment-friendly. The bio-based polysaccharide raw material has good biocompatibility and degradability, and an ideal base material is provided for developing a green and safe biomedical adhesive.

The invention relates to the technical field of adhesives, and particularly discloses a low-formaldehyde environment-friendly adhesive and a preparation method thereof. The invention relates to a low-formaldehyde environment-friendly adhesive which is prepared from the following raw materials in parts by mass: 30-50 parts of modified starch, 15-25 parts of vegetable protein, 5-10 parts of modified nano cellulose, 2-5 parts of a composite cross-linking agent and 80-150 parts of water, the composite cross-linking agent comprises amino silane and polyaspartic acid; the modified starch is prepared by performing graft copolymerization on starch subjected to enzymolysis by alpha-amylase and composite anhydride; the vegetable protein is subjected to alkalization and heat treatment before being used; the modified nano-crystalline cellulose is prepared by performing ring-opening etherification reaction on nano-crystalline cellulose, epoxypropane and ethylene oxide in sequence. The low-formaldehyde environment-friendly adhesive prepared by the invention has relatively good bonding strength and relatively low formaldehyde emission.

The invention relates to the technical field of adhesives, and discloses an imidazolium ionic liquid and a preparation method and application thereof, the preparation method comprises the following steps: reacting omega-bromoalcohol with 1-(methoxymethyl) imidazole in acetonitrile, and washing with methyl tert-butyl ether to obtain a target ionic liquid precursor; and dissolving the product in acetonitrile, adding 4-trifluoromethyl phenyl isocyanate, and washing with methyl tert-butyl ether after the reaction is finished, thereby obtaining the target imidazolium ionic liquid. The imidazolium ionic liquid disclosed by the invention is applied to a PVB (Polyvinyl Butyral) adhesive, and the PVB adhesive shows excellent adhesion strength in a macroscopic adhesion performance test on the basis of multiple interactions, and particularly has excellent adhesion strength on aluminum. The obtained adhesive can be universally adapted to various substrates such as metal substrates and macromolecule substrates, and finally high-strength and high-durability intelligent adhesion performance is achieved.

The invention discloses a multi-element binder for a dry-method electrode as well as a preparation method and application of the multi-element binder, and belongs to the field of lithium ion battery positive electrode materials. The multi-element binder comprises polytetrafluoroethylene and MAV, and the MAV is prepared from the following raw materials: sodium carboxymethyl cellulose, polyacrylic acid and polyvinylpyrrolidone. The preparation method comprises the following steps: (1) dissolving sodium carboxymethyl cellulose, polyacrylic acid and polyvinylpyrrolidone in water to obtain MAV, drying, and crushing into powder; and (2) mixing polytetrafluoroethylene with MAV to obtain the multi-element binder for the dry-method electrode. The multi-element binder provided by the invention can achieve the effects of strong adhesion, excellent conductivity and excellent stability.

The invention provides a starch-based adhesive for a paper adhesive tape as well as a preparation method and application of the starch-based adhesive, and relates to the technical field of adhesives. The starch-based adhesive for the paper adhesive tape comprises a main component and water, wherein the mass percentage of the main component is 5-10%; the main component is prepared from starch, polyvinyl alcohol and sodium carboxymethyl cellulose in a weight ratio of (25-75): (75-25): (3-7). The starch, the polyvinyl alcohol (PVA) and the carboxymethyl cellulose (CMC) form a blending system, and hydrogen bonds and chains among the three components are entangled to form a physical cross-linked network, so that the prepared starch-based adhesive simultaneously realizes dry-state dormancy (non-adhesion) and wet-state rapid activation (high initial adhesion).

The purpose of the present invention is to provide an adhesive tape having excellent heat resistance and excellent impact resistance to various types of impact. The present invention is an adhesive tape having an adhesive layer formed using an adhesive composition, wherein the adhesive layer has a glass transition temperature of 0°C or higher as measured by dynamic viscoelasticity measurement at a measurement frequency of 1 Hz in a measurement temperature range of -40°C to 200°C, and the half-value width of a peak of the loss tangent of the adhesive layer as measured by dynamic viscoelasticity measurement at a measurement frequency of 1 Hz in a measurement temperature range of -40°C to 200°C is 38°C or higher.

As a composition for forming a release layer, which yields a release layer that exhibits high heat resistance and suitable release properties and exhibits excellent stability following film formation, the present invention provides a composition for forming a release layer, which contains: (A) a hydroxyalkyl group-containing cellulose (A1) or a derivative thereof, or the like; (B) an acid compound or a salt thereof; (C) a crosslinking agent selected from among compounds having a nitrogen atom substituted with a hydroxyalkyl group and / or an alkoxymethyl group; (D) a polymer additive containing repeating units represented by formula (a1), formula (b) and formula (c); and (E) a solvent, and in which component (D) is contained at a quantity of 5-100 parts by mass relative to 100 parts by mass of component (A). (RA is a hydrogen atom or a methyl group, RB1 is a branched alkyl group which has 3 or 4 carbon atoms and in which at least one hydrogen atom is substituted with a fluorine atom, RC is a hydroxyalkyl group having 1-10 carbon atoms, and RD is a polycyclic alkyl group having 6-20 carbon atoms or an aryl group having 6-12 carbon atoms.)

The present application relates to the technical field of binder, and particularly relates to a water-based binder based on coordination cross-linking of polyvalent metal ions and a preparation method and application thereof.A preparation method of a water-based binder based on coordination cross-linking of polyvalent metal ions, specifically comprising the following steps: S1, dissolving carboxymethyl cellulose sodium in water, heating and stirring to form a carboxymethyl cellulose sodium aqueous solution; S2, dissolving a metal ion compound in deionized water to obtain a metal ion compound aqueous solution; the metal ion includes divalent metal ions and trivalent metal ions; S3, slowly adding the metal ion compound aqueous solution to the carboxymethyl cellulose sodium aqueous solution in a certain amount, continuously heating and stirring for a period of time, and obtaining the water-based binder.The mechanical property of the water-based binder is obviously improved, and the battery has better rate and more stable cycle.

The present application relates to a kind of intumescent fireproof composite board, including sequentially stacked inner layer, intumescent fireproof layer and outer layer, the inner layer is galvanized steel sheet, the intumescent fireproof layer, including the following mass parts of raw materials: carbonization agent 25~40 parts, acid source 10~25 parts, foaming agent 5~15 parts, filler 5~10 parts, resin 20~40 parts, water 20~30 parts, the acid source is ammonium polyphosphate, melamine polyphosphate and polyphosphoric acid hexamino cyclotriphosphazene Compound, the filler includes low-temperature expandable graphite;The outer layer is aluminum foil glass fiber cloth.The acid source of the present application is compounded, so that the fireproof composite board forms an expanded carbon layer at 250~400 DEG C;By compounding filler, the fireproof composite board forms an expanded isolation layer below 200 DEG C;That is, the intumescent fireproof composite board of the present application continuously plays a fire-retardant and heat-insulating role in the whole process stage of fire, meets the fireproof and heat-insulating requirements of Saturn cloud cabinet.

This invention discloses a biomass hot melt adhesive and its preparation method, belonging to the field of environmentally friendly adhesive technology. Addressing the industry pain points of existing biomass hot melt adhesives, such as difficulties in melt processing and the inability to simultaneously achieve both bonding performance and environmental friendliness, this invention uses a modified lignin graft copolymer prepared by a ring-opening grafting reaction of lignin sulfonate with L-lactide and ε-caprolactone as the matrix, compounded with nano-cellulose whiskers, cashew phenol-based plasticizers, composite crosslinking agents, and bio-based antioxidants to construct a fully biomass formulation system. The product is obtained through a solvent-free melt reaction blending process. The product of this invention is completely biodegradable, possesses excellent hot melt processability, bonding strength, water resistance, and storage stability, and the preparation process is green and environmentally friendly, suitable for large-scale industrial production, and can replace traditional petroleum-based hot melt adhesives.

The present invention relates to a microneedle patch for blocking ultraviolet rays and, more specifically, to a microneedle patch which can be attached to the skin of a user to deliver useful drugs while simultaneously blocking ultraviolet rays.

The invention discloses a single-component bio-based epoxy formaldehyde-free adhesive and a preparation method thereof, and relates to the field of adhesives for formaldehyde-free plywood production. The adhesive comprises the following raw materials in parts by weight: 10-20 parts of water, 1-2 parts of cellulose, 0-10 parts of a styrene-acrylic acid copolymer emulsion, 0.1-1 part of a wetting agent, 0.1-1 part of a dispersing agent, 10-20 parts of an acrylate copolymer emulsion, 10-20 parts of an ethylene-vinyl acetate copolymer emulsion, 10-30 parts of an epoxy emulsion, 10-30 parts of starch, 0-10 parts of a polyacrylamide solution, 1-2 parts of an accelerant and 1-2 parts of a pH regulator. 0.1-1 part of a defoaming agent; 0.1-1 part of a mildew preventive; the adhesive disclosed by the invention has the characteristics of long activation period, high bonding strength, good wood breaking effect, high adhesive film hardness, secondary activation of glue through thermal activation and the like; the method can obviously prolong the use time of the glue at the application end, fundamentally improves the pain point that the plywood is long in process time and cannot be segmented, enhances the comprehensive performance of the plywood, and can be applied to soft and hard wood base materials and compact wood.

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 invention relates to a reinforcing and / or filling material based on hemp particles, wherein the hemp particles have a diameter of 1-80 µm and a hemicellulose content of 10-20% by mass. The invention further relates to a method for producing the reinforcing and / or filling material, as well as various uses thereof.

This disclosure provides a high-silicon-content negative electrode sheet and its preparation method, as well as a lithium-ion battery. The high-silicon-content negative electrode sheet includes a current collector and a negative electrode slurry. The silicon-carbon composite material of the negative electrode slurry includes chemical vapor deposition (CVD) silicon-carbon material, graphite, and nano-silicon-carbon spheres; the particle size of graphite > the particle size of the CVD silicon-carbon material > the particle size of the nano-silicon-carbon spheres; the binder includes an ionic cellulose ether binder, a polyacrylic acid binder, and an elastomer binder; the negative electrode slurry also includes a multifunctional epoxy crosslinking agent and a photoinitiator; the negative electrode slurry after coating is subjected to an irradiation intensity of 40 mW / cm². 2 -60mW / cm 2 The electrode undergoes 20-40 seconds of continuous pre-crosslinking under light irradiation, followed by drying at 75-85°C for 10-20 minutes to form a negative electrode active layer with a highly elastic and tough organic three-dimensional constrained network. This high-silicon content negative electrode sheet, while reducing the total amount of binder used, ensures the stability of the coating process, suppresses the expansion of the high-silicon content negative electrode sheet, and improves the initial coulombic efficiency of the lithium-ion battery.

The invention provides an industrial lignin environment-friendly adhesive as well as a preparation method and application thereof. According to the mass percentage content, the lignin-cellulose composite material comprises 1.8-7.2% of industrial lignin, 1.8-3.6% of cellulose derivatives, formic acid aqueous solution and the balance of water, wherein the total mass percentage content is 100%; the content of formic acid in the adhesive is 24-48%; the total solid content of the industrial lignin and the cellulose derivative is 3.6-10.8%; the raw materials are uniformly mixed by stirring to obtain a uniform and stable dark viscous liquid, namely the lignin environment-friendly adhesive. The technical problem to be solved is how to prepare the environment-friendly industrial lignin adhesive which does not contain formaldehyde and phenol substances and is healthy and environment-friendly, and a pure biomass system is constructed by taking a papermaking byproduct industrial lignin (waste) and a natural cellulose derivative as core raw materials so as to realize high-value utilization of resources. Meanwhile, the preparation process of the adhesive can be completed at normal temperature and normal pressure, excellent bonding strength can be achieved through mild hot pressing when the adhesive is used for bonding wood, and the water resistance is good.

This application relates to the field of adhesive technology, specifically disclosing a low-formaldehyde environmentally friendly adhesive and its preparation method. The low-formaldehyde environmentally friendly adhesive is prepared from the following raw materials in parts by weight: 30-50 parts modified starch, 15-25 parts plant protein, 5-10 parts modified nanocellulose, 2-5 parts composite crosslinking agent, and 80-150 parts water; the composite crosslinking agent includes aminosilane and polyaspartic acid; the modified starch is obtained by enzymatic hydrolysis of starch with α-amylase followed by graft copolymerization with a composite acid anhydride; the plant protein is alkalized and heat-treated before use; the modified nanocellulose is obtained by sequentially reacting nanocellulose with propylene oxide and ethylene oxide in a ring-opening etherification reaction. The low-formaldehyde environmentally friendly adhesive obtained by this application has good bonding strength and low formaldehyde release.

The adhesive composition contains a cellulose derivative and a solvent component. The cellulose derivative has an acetyl group-based degree of substitution of 1.9 or more and 2.6 or less. The solvent component contains an organic solvent A having a boiling point of 100°C or more and an SP value of 18 to 30 (J / cm 1 / 2 3 / 2 ). The amount of the cellulose derivative is 15 mass% or more and 30 mass% or less relative to the total amount of the cellulose derivative and the organic solvent A.​

The present invention relates to a microstructure including a biocompatible polymer or an adhesive and to a method for manufacturing the same. The present inventors optimized the aspect ratio according to the type of each microstructure, thereby ensuring the optimal tip angle and the diameter range for skin penetration. Especially, the B-type to D-type microstructures of the present invention minimize the penetration resistance due to skin elasticity at the time of skin attachment, thereby increasing the penetration rate of the structures (60% or higher) and the absorption rate of useful ingredients into the skin. In addition, the D-type microstructure of the present invention maximizes the mechanical strength of the structure by applying a triple structure, and thus can easily penetrate the skin. When the plurality of microstructures are arranged in a hexagonal arrangement type, a uniform pressure can be transmitted to the whole microstructures on the skin.

The invention relates to the technical field of recycling of solid waste, and discloses a processing technology and application of a vinegar residue fiber composite cultural and creative product, and the processing technology comprises the following steps: soaking vinegar residue, removing impurities, crushing to obtain vinegar residue paste, mixing the vinegar residue paste with a biological agent, and fermenting to obtain a vinegar residue-based adhesive; mixing and stirring the vinegar residue-based adhesive and water, filtering to obtain vinegar residue fibers and starch-containing filtrate, precipitating the starch-containing filtrate, separating to obtain gelatinized starch, and preparing the cultural and creative product by taking the vinegar residue-based adhesive, the vinegar residue fibers and the gelatinized starch as raw materials. The unique smell of the vinegar residues is combined with local vinegar culture and non-abandoned processes, distinct characteristics and deep culture connotation are given to the cultural and creative products, and the core problems that existing cultural and creative products are homogenized, poor in environmental protection property and low in resource utilization rate are effectively solved.

The invention belongs to the technical field of adhesives, and particularly relates to an adhesive as well as a preparation method, application and a use method thereof. According to the method, bamboo wood is disintegrated to obtain an extract with lignin as a main component, and the extract and cellulose are assembled through non-covalent interaction to construct the adhesive; the obtained adhesive is adhered to a base material in a high-temperature hot pressing manner, so that the use of toxic reagents such as formaldehyde is avoided while high-strength adhesion is realized. The adhesive obtained by the invention can stably bond wood and various substrates, is waterproof, formaldehyde-free, green and environment-friendly, and the preparation method is simple and does not need precious precise instruments.

A conductive adhesive and its preparation method, a slurry and its preparation method, a silicon-containing lithium-ion battery and a computer-readable storage medium are provided. The conductive adhesive is consisted of a conductive agent, a binder and a solvent. The conductive agent is consisted of conductive spherical node substance, conductive fiber transition substance and tubular conductive substance. The conductive spherical node substance is at least one of carbon back, furnace black, acetylene black and Ketjen black. The conductive fiber transition substance is carbon fiber. The tubular conductive substance is single-walled carbon nanotube and / or few-walled carbon nanotube. The conductive adhesive of the present application has good dispersibility and high electrical conductivity.

The invention relates to a wafer cryo-peeling method, which includes the following steps: coating a liquid water-soluble medium on an end surface of an ingot and / or a clamping surface of a temperature-controlled clamp, and cooling and solidifying the water-soluble medium under the action of the temperature-controlled clamp to complete fixing of the ingot between a pair of temperature-controlled clamps; and moving at least one temperature-controlled clamp until a modified layer of the ingot is separated, and after peeling is completed, heating and liquefying the solid water-soluble medium under the action of the temperature-controlled clamp to obtain a wafer and remaining ingot. The method has the advantages of high peeling efficiency, saved cleaning process, easy control of peeling conditions, low risk of cracking, simple operation, and suitability for large-scale industrial applications.

The invention provides an adhesive for stacking and reinforcing plastic packaging bags as well as a preparation method and application of the adhesive, and belongs to the technical field of adhesives. The adhesive for stacking and reinforcing the plastic packaging bag, provided by the invention, is prepared from the following components in percentage by mass: 10 to 30 percent of maltodextrin, 1 to 10 percent of oligosaccharide, 3 to 15 percent of maltose, 3 to 15 percent of glucose, 0.1 to 0.5 percent of carboxymethylcellulose, 5 to 15 percent of alcohol reagent and the balance of water. The adhesive provided by the invention has the characteristic that the adhesive can be adhered again after being separated for multiple times when being used for stacking and reinforcing plastic packages.

The invention relates to the technical field of fruit and vegetable fresh-keeping, and provides a double-component fruit and vegetable preservative and fresh-keeping pad as well as a preparation method and application thereof. The double-component fruit and vegetable preservative and fresh-keeping pad provided by the invention contains the bactericide and the fresh-keeping agent at the same time, can release SO2 and / or ClO2 and 1-methylcyclopropene (1-MCP) gas in preservative and fresh-keeping processes, and integrates sterilization and fresh-keeping functions; the adhesive is prepared from the ethyl cellulose, the hydroxy propyl cellulose and the ethanol, and the bactericide or the preservative is wrapped by the adhesive, so that a slow release effect can be achieved, and the preservative and fresh-keeping time can be prolonged. The preservative and fresh-keeping pad is convenient to use, and the bactericide and the preservative adopted in the preservative and fresh-keeping pad meet relevant national regulations and standards. Furthermore, by controlling the structure and the number of layers of the fresh-keeping pad, the preservative and fresh-keeping time of the fresh-keeping pad can be changed, the fruit and vegetable fresh-keeping pad suitable for short-term storage and transportation and long-term storage is obtained, and the application range is wide.

The invention provides a high-performance ceramic tile adhesive and a preparation method thereof, belongs to the technical field of building materials, and aims to solve the problem that the traditional ceramic tile adhesive cannot systematically meet the comprehensive requirements of the high-performance ceramic tile adhesive on airing time, sagging resistance, strength and workability in construction all day, and the high-performance ceramic tile adhesive comprises HPMC, multi-element starch ether, an anti-sagging agent and a dispersing agent, the multi-element starch ether, the anti-sagging agent and the high and low temperature stable dispersing agent are synergistically compounded, so that the synergistic enhancement of various properties is realized.

An electrode material including an active material; a non-fluorinated polymer binder that includes a detectable label; and a conductive filler.

The application belongs to the technical field of lithium ion batteries, and discloses a carbon-compatible binder for a silicon-carbon negative electrode of a lithium ion battery, a preparation method and application thereof, wherein the carbon-compatible binder is abbreviated as CMC-Py, sodium carboxymethyl cellulose is dissolved in a phosphate buffer solution, then N-hydroxysuccinimide and 1-ethyl-(3-dimethylaminopropyl) carbodiimide are added to activate the carboxyl group of the sodium carboxymethyl cellulose, finally, 1-pyrenemethylamine hydrochloride is added, and the reaction is carried out under stirring and N2 at room temperature to obtain the binder. The binder is prepared by the amidation reaction of sodium carboxymethyl cellulose as a main chain and 1-pyrenemethylamine hydrochloride, the pyrene group introduced can form a pi-pi conjugated system with graphite in the silicon-carbon material, the interface compatibility of the binder and the silicon-carbon material can be effectively improved, the dispersibility and the adhesion of the silicon-carbon material can be enhanced, and the electrochemical performance of the silicon-carbon negative electrode of the lithium ion battery is significantly improved.

Herein disclosed is a mucoadhesive including a bacterial cellulose, and a bioadhesive incorporated to the bacterial cellulose, wherein the bioadhesive comprises a polymer or a dendrimer, wherein the polymer and the dend rimer are grafted with a moiety which forms covalent interactions with a tissue surface in the presence of a stimulus. A method of forming the mucoadhesive is also disclosed. The method includes providing a bacterial cellulose, providing a bioadhesive comprising a polymer or a dendrimer, wherein the polymer and the dendrimer are grafted with a moiety which forms covalent interactions with a tissue surface in the presence of a stimulus, and incorporating the bioadhesive to the bacterial cellulose. In the preferred embodiment, the dendrimer grafted with the moiety is Poly(amidoamine) (PAMAM) dendrimer grafted with 4-[3-(trifluoromethyl)-3H-diazirin-3-yl] benzyl bromide (PAMAM-g-diazirine) and the stimulus is UV light.

COSMETIC ADHESIVE COMPOSITIONS A cosmetic adhesive composition is proposed. The cosmetic adhesive composition includes water; approximately 10% to 20% by weight of one or more acrylic latex polymers having a glass transition temperature (Tg) below approximately -40 °C; one or more aqueous polyurethane dispersions; and one or more saccharide esters of at least one C2-C4 organic acid. The one or more acrylic latex polymers having a glass transition temperature below approximately -40 °C and the one or more aqueous polyurethane dispersions are present in a concentration-by-weight ratio that is in the range of approximately 1:3 to approximately 3:1. Methods for bonding false eyelashes and false eyebrows are also proposed. Figure for abstract: none