233results about "Cellulose adhesives" patented technology

The invention discloses a modified sodium carboxymethyl cellulose-based binder, and belongs to the technical field of binders for lithium ion batteries. According to the modified sodium carboxymethyl cellulose-based binder, CMC-Na is used as a raw material, and a modifier is added, so that the modified sodium carboxymethyl cellulose-based binder is obtained; the modifier is any one of a mixture of PA (polyamide) and CaCl2 or PEI (polyetherimide). The specific capacity of the prepared C-PEI-10% pole piece is 2249.1 mAh g <-1 > after 100 cycles under the current density of 0.2 C, and a compact SEI layer can be formed on the electrode. The specific capacity of Si-coated C-PA-Ca < 2 + > is 1879.7 mAh g <-1 > after 300 cycles under the current density of 0.5 C, and the capacity retention ratio is 70.85%.

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 discloses a non-adhesive laminated polyimide flexible copper clad laminate. The structure of the non-adhesive laminated polyimide flexible copper clad laminate sequentially includes an upper copper foil layer, a dielectric layer, and a lower copper foil layer from top to bottom. The dielectric layer includes a polyimide composite layer; the polyimide composite layer includes a thermosetting polyimide layer and adhesive layers disposed on both the upper and lower sides of the thermosetting polyimide layer, and the adhesive layer is a modified polyimide layer; wherein, the modified polyimide layer is a polyimide modified by nanocrystalline cellulose and an epoxy silane coupling agent. The present invention realizes a structure in which the dielectric layer can contain multiple polyimide composite layers, greatly improves the thickness of the dielectric layer, and solves the deficiencies existing in the prior art. The non-adhesive laminated polyimide flexible copper clad laminate of the present invention has the advantages of excellent electrical properties, high peel strength, high tensile strength, and excellent dimensional stability, and has good application prospects.

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 belongs to the technical field of chemical modification of natural polymer materials, and particularly relates to a modified cellulose adhesive and a preparation method thereof. The modified cellulose adhesive is prepared from the following components in parts by weight: 50 to 70 parts of modified cellulose-based emulsion, 10 to 20 parts of VAE (Vinyl Acetate Ethylene) composite emulsion, 5 to 8 parts of rosin water emulsion, 3 to 8 parts of cross-linking agent and 2 to 5 parts of plasticizer, the modified cellulose is obtained by grafting an epoxy hypophosphite compound and a fluorine-containing pentaphenyl alkynyl dicarboxylic acid compound with a nano cellulose solution; according to the prepared modified cellulose adhesive, targeted improvement of waterproofness, durability and bonding strength is achieved through molecular design.

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 adhesive preparation, in particular to an epoxy resin-based paper adhesive and a preparation method thereof, and the epoxy resin-based paper adhesive is prepared from the following raw materials in parts by weight: 40-55 parts of an epoxy resin matrix, 18-29 parts of a bio-based reinforcing system, 15-25 parts of a recovery adaptation system and 10-15 parts of a toughening system; the epoxy resin matrix is composed of bisphenol A epoxy resin and epoxidized soybean oil. According to the invention, bio-based modified epoxy resin and natural polymer partially replace petrochemical raw materials, carbon footprint is significantly reduced, the defect of insufficient water resistance of a biological material is made up through a nanocellulose composite enhancement technology, and a thermo-sensitive polyvinyl alcohol and initiator system is introduced, so that the binder can be rapidly stripped under mild conditions during recovery, and the recovery rate of the binder is increased. According to the scheme, high bonding strength is kept, meanwhile, comprehensive optimization of recoverability, environmental adaptability and cost effectiveness is achieved, and reliable technical support is provided for green upgrading of the corrugated paper industry.

Provided is a nonaqueous binder for electrodes or separators, which is used in a lithium ion battery that has excellent cycle life characteristics at high temperatures. A nonaqueous binder for electrodes or separators of lithium ion batteries, which is obtained by complexing cellulose nanofibers and a thermoplastic fluororesin, and which is characterized in that the cellulose nanofibers have a fiber size (diameter) of from 0.002 μm to 1 μm (inclusive), a fiber length of from 0.5 μm to 10 mm (inclusive), and an aspect ratio ((fiber length of cellulose nanofibers) / (fiber diameter of cellulose nanofibers)) of from 2 to 100,000 (inclusive).

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 relates to the technical field of aluminum foil glass fiber adhesive tape processing, in particular to an aluminum foil glass fiber adhesive tape and a preparation method thereof, and the aluminum foil glass fiber adhesive tape sequentially comprises an aluminum foil layer, a polyurethane adhesive layer, a tearable glass fiber layer and a silica gel layer, the polyurethane adhesive layer is prepared from the following raw materials in percentage by weight: 40-50% of polyurethane resin, 5-10% of acrylic acid modified alkyd resin, 10-15% of a tackifier, 8-12% of a reinforcing agent, 2-4% of an adhesive agent, 1-2% of a curing agent and the balance of a diluent; the reinforcing agent is composed of nano solid filler and cellulose nanofibers, the formula of the tearable glass fiber layer and the optimized polyurethane adhesive layer is introduced, so that the aluminum foil glass fiber adhesive tape is easier to tear down in the installation and maintenance process, and the operation difficulty and complexity are reduced. Meanwhile, raw materials such as the acrylic acid modified alkyd resin and the reinforcing agent are added into the polyurethane adhesive layer, so that the physical strength of the adhesive tape is remarkably improved. Even if the adhesive tape bears external force, the adhesive tape is not easy to damage, so that the practical application effect and the durable life of the adhesive tape in wire harness protection are ensured.

The invention discloses a glycyrrhiza cellulose reinforced polyacrylate pressure-sensitive adhesive and a preparation method thereof, and belongs to the technical field of polyacrylate pressure-sensitive adhesives, the preparation method comprises the following steps: extracting glycyrrhiza cellulose, treating glycyrrhiza cellulose microfibers, preparing a water-based polyacrylate emulsion, preparing an auxiliary agent, and mixing; the step of mixing comprises the following steps: mixing the treated glycyrrhiza cellulose microfibers, a water-based polyacrylate emulsion, an auxiliary agent, an anti-freezing agent, a defoaming agent and a mildew preventive, and stirring at room temperature to obtain the glycyrrhiza cellulose reinforced polyacrylate pressure-sensitive adhesive. The glycyrrhiza cellulose reinforced polyacrylate pressure-sensitive adhesive prepared by the invention has excellent water resistance, cohesive strength, adhesive film adhesion, transparency, storage stability and weather resistance.

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 invention discloses a polyurethane bonding material for furniture and a preparation method of the polyurethane bonding material. The polyurethane bonding material is prepared from the following raw materials in parts by weight: 130-200 parts of polyurethane resin. By arranging the polyurethane resin, the xylene, the methanol and the acetone, the fluidity and the adhesiveness of the polyurethane bonding material can be better, the phenomenon of insufficient viscosity is avoided, by arranging the cellulose, the quartz powder and the glass fibers, the strength of the polyurethane bonding material can be higher, the contractility of the polyurethane bonding material is further improved, and the service life of the polyurethane bonding material is prolonged. By arranging the solvent, the buffering agent, the anti-aging agent, the accelerant and the stabilizer, the performance and the manufacturability of the polyurethane bonding material can be improved, and the problems that the curing speed is high, the polyurethane bonding material is usually cured in a very short time after being coated, the operation difficulty is increased in the using process, and the service life of the polyurethane bonding material is prolonged are solved. Especially for the situation that large-area bonding is needed or longer working time is needed, the use quality of a user is affected.

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.

An aqueous NFC containing tail-seal adhesive includes:(a) water;(b) nanofibrillated cellulose; and(c) one or more of: (i) a water-soluble cellulose derivative; or (ii) a water soluble polyol; or (iii) a viscosity modifier other than a water soluble cellulose derivative.

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.