178results 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 present invention relates to a porous composite feedstock for metal chloride preparation, comprising a metal oxide containing material,; and / or a first additive; and a binder; wherein the porous composite feedstock is in particulate form; wherein the water content of the porous composite feedstock is in the range of from 0.01 to 5 wt.% based on the weight of the porous composite feedstock; and wherein the porous composite feedstock has a poured bulk density in the range of from 0.2 g / cm3 and 2.0 g / cm3.

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 present application relates to the field of adhesives, and specifically discloses a degradable environmentally-friendly adhesive for woodworking and a preparation method therefor. The adhesive comprises the following raw materials in parts by weight: 10-20 parts of a solution in which polyvinyl alcohol is dissolved, 3-10 parts of a filler, 45-60 parts of a copolymer emulsion, 10-20 parts of a stabilizer, 1-3 parts of glycerol, and 1-4 parts of an auxiliary agent. The adhesive has a solid content of 40-50% and a viscosity of 15,000-19,000 cps (25°C). The preparation method for the adhesive comprises the following steps: stirring a copolymer emulsion, adding a stabilizer thereto and uniformly dispersing same, then adding a solution in which polyvinyl alcohol is dissolved, and performing homogenization to obtain a mixture; and adding a filler to the mixture, increasing the stirring speed until the filler is fully dispersed and the resulting colloid is homogeneous and free of visible particles, then adding glycerol, an auxiliary agent and an appropriate amount of water thereto, and stirring same until the system is homogeneous and free of bubbles. The obtained adhesive has good bonding performance, and still a has good bonding strength after being placed at a relatively high temperature for a long time.

The invention belongs to the technical field of biomass materials and environment-friendly adhesives, and relates to a biomass adhesive, in particular to a preparation method of a biomass environment-friendly adhesive based on longan shells, which comprises the following steps: firstly, cleaning, drying, crushing and screening the longan shells for pretreatment, and then carrying out alkalization and acetylation chemical modification to obtain the biomass environment-friendly adhesive based on the longan shells. And finally, compounding with gelatinized starch, a chitosan acetic acid solution and citric acid, and adjusting the viscosity to obtain the adhesive. The waste longan shells are used as raw materials, agricultural waste recycling is achieved, the product is free of formaldehyde release and biodegradable, and the viscosity of the prepared adhesive is 1000-2000 mPa.s at the temperature of 25 DEG C and is measured through a rotary viscometer; the wood-wood bonding strength is larger than or equal to 2.5 MPa, the 24-hour water absorption rate is smaller than or equal to 25%, the problems that a traditional biomass adhesive is short in performance and low in cost, special equipment is not needed for preparation are solved, the adhesive is suitable for the industrial fields of artificial board manufacturing, furniture manufacturing and the like, and environment-friendly transformation of the adhesive industry is promoted.

The invention relates to the technical field of adhesives, and particularly discloses a water-soluble adhesive and application thereof in non-woven fabric. The water-soluble adhesive comprises the following raw materials in parts by weight: 10-20 parts of starch; 5 to 10 parts of PVA; 100 parts of water; wherein the starch comprises cationic starch and glycidyl methacrylate modified starch. The adhesive disclosed by the invention can be applied to the fields of non-woven fabrics, packing material bonding, wood bonding and the like, has an excellent bonding effect, and can be used for effectively improving the bonding effect and mechanical strength of the non-woven fabrics by utilizing hydrogen bond bonding between positive ions and a bonded material; and glycidyl methacrylate can also be utilized to improve the water resistance effect of the adhesive, so that the non-woven fabric also has an excellent bonding effect in a humid environment, and the treatment effect on the saccharin sodium waste is improved.

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 belongs to the field of lithium ion batteries, and discloses a lithium ion battery skeleton type nanocellulose positive electrode binder and a preparation method and application thereof. The skeleton type nanocellulose positive electrode binder comprises nanocellulose, a cross-linking agent and a lithium salt, the mass fraction of the nanocellulose accounts for 70-95 wt% of the total amount of the binder, the mass fraction of the cross-linking agent accounts for 2-10 wt% of the total amount of the binder, and the mass fraction of the lithium salt accounts for 5-20 wt% of the total amount of the binder. After the binder is cured, a continuous three-dimensional ion transmission channel skeleton structure is formed, and a good and smooth conduction path is provided for intercalation-deintercalation of lithium ions while a positive electrode active material is fixed, so that the cycle performance and the rate capability of the battery are improved. The binder is rich in raw material source and low in price, and large-scale commercial production can be achieved easily.

The invention belongs to the technical field of lithium ion battery preparation, and particularly relates to a multifunctional composite adhesive for a lithium-rich manganese-based positive electrode and a preparation method and application thereof. The multifunctional composite adhesive is obtained by dissolving cellulose nanocrystals (CNC) and sodium carboxymethyl cellulose (CMC) in deionized water and then stirring and cross-linking. According to the lithium-rich manganese-based positive electrode material, the bonding and mechanical properties can be effectively improved, the conductivity of a lithium-rich manganese-based positive electrode can be enhanced, reaction kinetics can be accelerated, a transmission path can be optimized, the charge-discharge cycle stability, rate capability and the like of the battery can be greatly improved, and the battery with stable capacity and long cycle life can be obtained; and within the voltage of 2-4.8 V, the capacity retention ratio is 103.36% after 50 cycles under the current of 0.1 C, the capacity retention ratio is 90.47% after 400 cycles under the current of 1C, and the specific discharge capacity can reach 161.98 mAh / g under the current of 5C. In addition, the composite binder disclosed by the invention is simple in composition, simple in preparation process, easy in raw material acquisition, low in cost, non-toxic and safe, greatly reduces the production difficulty, and is suitable for large-scale industrial production.

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 present invention belongs to the technical field of tobacco materials, specifically relating to a conjugated heat-conducting modified cellulose thermal adhesive. It further discloses the use of the thermal adhesive in preparing thermally conductive enhanced tobacco sheets, shredded tobacco, or heated cigarettes. The conjugated heat-conducting modified cellulose thermal adhesive of the present invention incorporates soluble and edible cellulose and an oxidized conjugated thermally conductive material through a blending and granulation process for an esterification reaction. This achieves covalent bond fixation of the conjugated thermally conductive material, and utilizes the high thermal conductivity of the conjugated thermally conductive material to form a functional cellulose material with high thermal conductivity efficiency, which can be used to improve the thermal conductivity of tobacco and its tobacco products.

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 method for manufacturing a paper or paperboard based packaging laminate, said method comprising: a) providing a paper or paperboard substrate, b) providing a microfibrillated cellulose (MFC) film comprising at least 50 wt% of MFC based on the dry weight of the MFC film, and c) laminating a surface of the paper or paperboard substrate to a surface of the MFC film by a melt adhesive process using a melt adhesive comprising at least 50 wt% of a water soluble thermoplastic polymer based on the dry weight of the melt adhesive, wherein the melt adhesive is applied to the surface of the paper or paperboard substrate and / or to the surface of the MFC film in a low solvent or solvent free form.

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.

An exemplary process comprises synthesis of methylcellulose in the presence of methanol, leading to an improved methylcellulose having gel-like characteristics in solution.

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 discloses a preparation method of a bio-based binder based on a lithium-sulfur battery in the technical field of lithium-sulfur batteries, which comprises the following steps: S1, selecting a natural polymer material as a matrix material, purifying the selected matrix material, and modifying according to actual requirements; s2, uniformly mixing the modified matrix material with a reinforcing component; s3, adding a cross-linking agent into the mixed system to carry out a cross-linking reaction; s4, water and a low-toxicity organic solvent are adopted as dispersion media, the mixed system is dispersed in a selected solvent, and uniform slurry is formed; and S5, coating the prepared binder slurry on an electrode current collector of a lithium-sulfur battery, and then carrying out drying treatment to obtain the bio-based binder. According to the invention, a natural high polymer material is adopted as a matrix, so that the dependence on petroleum-based raw materials is reduced, the environmental pollution in the production process is reduced, and the concepts of green chemistry and sustainable development are met.

The purpose of the present invention is to provide an adhesive composition capable of exhibiting high shear adhesive strength and excellent adhesion to an adherend. The purpose of the present invention is also to provide an adhesive tape having an adhesive layer formed using the adhesive composition. The present invention is an adhesive composition containing a (meth)acrylic copolymer, wherein the (meth)acrylic copolymer has a constituent unit derived from an alkyl (meth)acrylate having a branched alkyl group, and the alkyl (meth)acrylate having a branched alkyl group contains a branched alkyl group-containing alkyl (meth)acrylate exhibiting a glass transition temperature of -55°C to -15°C when formed into a homopolymer.

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 present application relates to the technical field of rubber adhesive, in particular to a preparation method of anti-wet skid rubber adhesive, comprising the following steps: S1, first, solution polymerized styrene-butadiene rubber, white carbon black and silane coupling agent are put into a mixer to obtain a first mixture; S2, then, zinc oxide, stearic acid, antioxidant and anti-wet skid material are put into the mixer to obtain a second mixture; S3, finally, sulfur, accelerator and anti-wet skid material are put into the mixer to obtain the rubber adhesive; the addition amount of the anti-wet skid material is associated with the total mass of the mixture in the mixer, the rotor speed, the difference between the mixing time of the current step and the previous step and the discharge temperature; the rubber adhesive obtained by the preparation method can be applied in tires; the present application is divided into three mixing steps, which accelerates the interface reaction of each raw material and improves the anti-wet skid property of the rubber adhesive.

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.

Provided is an adhesive agent for resin, said adhesive agent having superior adhesion between a copper-based material substrate and a resin substrate. An adhesive agent for resin, said adhesive agent including one or both of a product (C) of a Maillard reaction in which a carbohydrate (A) and / or a reductone (B), and an amine compound (G) and / or an amine equivalent (H) served as source materials, and a product (D) of a caramelization reaction in which a carbohydrate (A) and / or a reductone (B) served as a source material or materials.