56results about "Chitin 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 discloses a preparation method of an environment-friendly degradable single-sided perspective sticker, and belongs to the technical field of modified nano materials. The method comprises the following steps: (1) preparation of a multi-layer composite structure: mixing polylactic acid and poly (butylene succinate), adding nano-montmorillonite and a surface modifier, and carrying out melt blending to form a first-layer melt; stirring poly (butylene adipate-co-terephthalate) and fluorescent carbon nanodots to form a second layer of melt; the first layer, the pressure-sensitive adhesive layer and the second layer are co-extruded and compounded to form a film blank. And (2) construction of the nano-film: biaxially stretching the film blank, imprinting a micropore array, dipping in the silver nanoparticle suspension, and drying to obtain the nano-film. And (3) coating functionalization treatment: immersing into a fluorine-containing nano coating solution, and curing. And (4) post-treatment: carrying out secondary curing. The obtained single-sided perspective sticker is suitable for the fields of buildings, vehicle privacy films and the like, and solves the problems of serious pollution and slow degradation of a traditional sticker.

The invention discloses a protective adhesive film for sealing and testing a semiconductor and a preparation method of the protective adhesive film, and relates to the technical field of adhesives. The protective adhesive film is obtained by taking a modified acrylate monomer as a main body, taking a synthetic product of 2-hydroxypyridine and methacryloyl chloride as a modifier, taking trimethylolpropane triacrylate as a cross-linking agent and adding maleic anhydride modified modified chitosan and modified polyimide in a polymerization film forming process. The modified acrylate monomer is obtained by taking graphene oxide modified by vinyl trimethoxy silane and hollow glass beads modified by methacryloxy propyl trimethoxy silane as heat conducting fillers; the modified polyimide is obtained by adding a boron nitride nanosheet modified and acidified by amino acrylic acid as a heat-conducting reinforcing filler into a polyimide prepolymer and then carrying out imidization. The mechanical property, heat conduction efficiency and low-temperature brittleness of the protective adhesive film can be improved.

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 belongs to the technical field of preparation of molecular materials and adhesive tapes, and discloses a degradable mylar adhesive tape and a preparation method thereof, the degradable mylar adhesive tape comprises a degradable base material layer and a degradable adhesive layer; the degradable base material layer is prepared from the following raw materials in parts by mass: 25-35 parts of poly (butylene succinate) (PBS), 20-30 parts of polylactic acid (PLA), 10-15 parts of polycaprolactone (PCL), 8-12 parts of modified bamboo fiber powder, 3-5 parts of a compatibilizer and 0.5-1 part of an antioxidant; the degradable adhesive layer is prepared from the following raw materials in parts by mass: 40 to 50 parts of a modified starch-based adhesive, 15 to 25 parts of poly (butylene adipate-co-terephthalate) (PBAT), 10 to 15 parts of polyhydroxyalkanoate (PHA), 5 to 8 parts of sodium alginate-chitosan composite gel, 5 to 8 parts of an epoxypropane modifier, 1 to 2 parts of a cross-linking agent and 0.3 to 0.5 part of a de-foaming agent; by optimizing the raw material composition and the preparation process of the base material and the adhesive, the full-life-cycle degradability of the adhesive tape is realized, and meanwhile, excellent mechanical properties, insulativity and temperature resistance are ensured.

The invention belongs to the technical field of adhesive materials, and particularly relates to a modified starch-based water-based adhesive as well as a preparation method and application thereof. According to the adhesive, oxidized corn starch is taken as a base material, hydrophobic and weather-resistant modification is realized by introducing a fluorine-silicon-containing functional monomer, and hydroxypropyl quaternized chitosan is compounded to endow antibacterial property and a film-forming enhancement effect; a borax cross-linked polyol system is supplemented to improve the cohesive strength, and a plasticizer, a thickening agent and an emulsifier are matched to optimize the rheological property and wettability. The preparation process comprises the steps of starch gelatinization, fluorosilicone urea grafting, chitosan derivative compounding, auxiliary agent blending and the like, and the process is mild, environment-friendly and non-toxic. The obtained water-based adhesive has the characteristics of strong initial adhesion, good water resistance, moderate flexibility, excellent biocompatibility and the like, and is especially suitable for adhesion and manufacturing of ball products such as basketballs, footballs and the like.

The invention discloses a safe and easy-to-tear firework lead paper adhesive product and a preparation method thereof, and belongs to the technical field of paper adhesive product preparation. The safe and easy-to-tear firework lead paper adhesive product is composed of cotton paper, backing paper and modified hot melt adhesive coated on the surface of the cotton paper, and the modified hot melt adhesive is composed of 80-96 parts of composite resin, 15-24 parts of curing agent, 4-9 parts of plasticizer, 10-15 parts of filler, 30-50 parts of solvent, 2-6 parts of hydrophobic modifier and 1-6 parts of assistant. The product prepared by the method has excellent bonding performance, safety performance and hydrophobic performance.

The present application provides a kind of ship hull barnacle protection net.The support layer of the protection net is nanofiber membrane with micron pit array formed by laser etching, the inside is attached to the adhesive made of modified dopamine-acrylate copolymer, nano-silica, calcium alginate microspheres, chitosan, chitin nanofiber, lanolin and antioxidant, and the outside is compounded with stainless steel wire mesh.The present application realizes long-term inhibition of barnacles through the physical barrier of the hydrophobic support layer and the synergistic effect of the antifouling components in the adhesive without adding toxic antifouling agents, and has the characteristics of firm bonding, excellent mechanical properties, environmental protection and non-toxicity, effectively solves the problems of poor antifouling effect, insufficient bonding reliability and poor environmental protection of existing protection materials, and is suitable for barnacle protection of underwater parts of ship hull.

The present invention particularly relates to the field of adhesion of tobacco products. Disclosed are a water-based adhesive for cigarettes, and a preparation method therefor. By adding sodium fluorescein to the adhesive, the adhesive emits bright green fluorescence under ultraviolet light, and the quality detection during production process and anti-counterfeiting function are realized. In addition, sodium bicarbonate and citric acid react to generate carbon dioxide bubbles, thereby enhancing the visualization and controllability of the adhesion process. By means of the improvements, the present invention effectively solves the problems of difficult quality control and poor user experience in the prior art, improves the performance and the application effect of the adhesive, and satisfies the requirements of the modern tobacco industry for efficient, safe and multifunctional adhesives.

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 invention relates to the technical field of lithium ion batteries, in particular to a preparation method of a binder for a lithium battery. The preparation method specifically comprises the following steps: step 1, initiating polymerization of vinylidene fluoride, dioctyl sebacate and lauryl methacrylate to obtain modified polyvinylidene fluoride resin; 2, carboxymethyl chitosan is subjected to a reaction with diketoacrylamide and phthalic dihydrazide in sequence, and modified chitosan is obtained; and 3, mixing the modified polyvinylidene fluoride resin, the modified chitosan and polyvinyl alcohol, stirring and compounding to obtain the binder for the lithium battery. The binder for the lithium battery can form a plurality of hydrogen bond network structures with the surface of a negative electrode active material, so that the lithium battery has a firmer mechanical structure, and the lithium battery can bear the stress of internal volume expansion; in addition, the binding force between the negative electrode active material and the current collector can be greatly improved, the cycle performance of the battery is improved, the electrochemical performance and the safety performance of the lithium battery are ensured, and great practical application significance is achieved.

The invention discloses application of a rosin derivative, a rosin derivative modified chitosan adhesive as well as a preparation method and application of the rosin derivative modified chitosan adhesive, according to the application of the rosin derivative, the structure of the rosin derivative is shown in the specification, and the rosin derivative is used for modifying the chitosan adhesive. The rosin derivative modified chitosan adhesive is prepared from the following raw materials in percentage by mass: 8% of chitosan, 2-4% of rosin derivative, 1-2% of microcrystalline cellulose and the balance of deionized water. The problems that an existing chitosan adhesive is low in shear strength and poor in water resistance are effectively solved.

The present application relates to a kind of environment-friendly flame-retardant cold-pressing adhesive and its preparation method.The raw materials of the environment-friendly flame-retardant cold-pressing adhesive include 14-21 parts of modified hydrosol, 5-15 parts of magnesium sulfate, 25-35 parts of magnesium chloride, 95-105 parts of magnesium oxide and 0.001-0.01 parts of boric acid by weight.The modified hydrosol is prepared by oxidation crosslinking reaction of propylene hard monomer and hydrosol precursor in the presence of oxidant and crosslinking agent.The adhesive obtained by compounding modified hydrosol with magnesium oxychloride and magnesium oxysulfate inorganic glue has the advantages of high mechanical and bonding strength, good water resistance, and good flame-retardant effect.The modified hydrosol provided by the present application has crosslinking network and abundant hydroxyl and carboxylic acid groups, which gives the adhesive excellent permeability and bonding strength.Magnesium oxychloride inorganic glue enhances the mechanical strength of the adhesive, and magnesium oxysulfate inorganic glue enhances the water resistance of the adhesive.The present application also relates to a plywood containing the above-mentioned environment-friendly flame-retardant cold-pressing adhesive and its preparation method.

The application discloses a preparation method of an environment-friendly degradable single-side perspective sticker and belongs to the technical field of modified nanometer materials. The method comprises the following steps: (1) preparation of a multilayer composite structure: mixing polylactic acid and polybutylene succinate, adding nano-montmorillonite and a surface modifier to melt blend to form a first layer melt; stirring polybutylene adipate terephthalate and fluorescent carbon nanodots to form a second layer melt; and forming a film blank by co-extruding the first layer, a pressure-sensitive adhesive layer and the second layer; (2) construction of a nanometer film: biaxially stretching the film blank, pressing a micropore array, immersing in a silver nanoparticle suspension and drying to obtain a nanometer film; (3) functionalization treatment of a coating layer: immersing in a fluorine-containing nanometer coating solution and solidifying; and (4) post-treatment: secondary solidification. The obtained single-side perspective sticker is suitable for fields such as building and vehicle privacy films, and solves the problems of large pollution and slow degradation of traditional stickers.

The present invention relates to the manufacture of a photo-crosslinkable biodegradable tissue adhesive using a multinetwork-forming copolymer, and provides a hyaluronic acid copolymer compound having excellent elongation, mechanical properties, and tissue adhesion. The compound fundamentally does not undergo phase separation, and enables the manufacture of a tissue adhesive with desired adhesive characteristics and physical characteristics.

The invention relates to the technical field of solid-state batteries, in particular to a chitin derivative binder and application thereof in an all-solid-state battery. The structural formula of the chitin derivative binder is shown in the specification, in the formula, R is independently selected from any one or more of H, X-C = O-, alkyl,-CH2CH (OH) CH3, Y-NH-C = O-,-CH3 (CH2) and-CH3COONa, and X and Y are alkyl; n is an integer not less than 10. The chitin derivative binder is synthesized for the first time and is applied to composite solid electrolyte film formation, and the composite electrolyte prepared from the chitin derivative has high flexibility and ionic conductivity, is suitable for various electrode materials and an existing lamination process, and has a rapid industrialization prospect.

The invention discloses a production process of a degradable antibacterial BOPP adhesive tape for food packaging, and relates to the field of packaging materials and adhesive tapes. According to the method, a blend of polylactic acid and a poly (butylene adipate-co-butylene terephthalate) copolymer is used as a base material, and through melt mixing, extrusion calendering, two-way stretching, surface treatment and coating of an adhesive layer containing a pressure-sensitive adhesive and an addition antibacterial agent, the polylactic acid / poly (butylene adipate-co-butylene terephthalate) composite film with packaging strength and processing adaptability and good packaging performance is prepared. And the adhesive tape also has biodegradability and an antibacterial function. The obtained adhesive tape is suitable for food packaging, box sealing and packaging and can be degraded under the composting condition after being used, and meanwhile, the antibacterial layer of the adhesive tape has a remarkable inhibiting effect on common food-borne microorganisms.

The present disclosure provides for a photocrosslinkable tissue bonding composition comprising: a poly(ethylene glycol) functionalized with at least one photocrosslinkable group, a hydroxy-modified chitosan, and a photochemically active dye. Further provided herein is a photocrosslinked tissue bonding composition comprising: a photochemically active dye and a functionalized poly(ethylene glycol). Also disclosed is a kit for treating a wound, comprising a poly(ethylene glycol) functionalized with at least one photocrosslinkable group, a hydroxy-modified chitosan, a photochemically active dye, and an applicator. Further provided is a method for producing a photocrosslinkable tissue bonding composition and a method for treating a wound.

The invention discloses a hydrogel adhesive composition for plant grafting and a grafting method and application of the hydrogel adhesive composition, and belongs to the technical field of agricultural materials and gardening assistants.The hydrogel adhesive composition comprises hydrogel precursors and a cross-linking agent, the hydrogel precursors are sodium alginate (SA) and chitosan (CS), the cross-linking agent is a salt solution containing divalent cations, and the hydrogel precursors are sodium alginate (SA) and chitosan (CS). The sodium alginate, the chitosan and the cross-linking agent are subjected to a cross-linking reaction, the generated hydrogel generates dynamic and self-adaptive clamping force through dehydration shrinkage, and the static pressure of the hydrogel is superior to that of a traditional mechanical clamp.

The present application relates to the technical field of binder, in particular to a water-based in-situ double cross-linking binder for silicon-based negative electrode, and a preparation method and application thereof.The preparation method comprises the following steps: S1, dissolving an anionic polysaccharide derivative and polyacrylic acid in water respectively, and forming aqueous solutions after stirring and dissolving; S2, mixing and stirring the two solutions according to different mass ratios to obtain a uniform compound solution as a first component solution A; S3, dissolving a compound containing a three-membered epoxy structure in water or an alcohol solution as a second component solution B; the compound containing the three-membered epoxy structure contains at least one epoxy group; and S4, slowly adding a certain amount of solution B to solution A, and continuously heating and stirring for a period of time to prepare the water-based in-situ double cross-linking binder for silicon-based negative electrode.The binder can perfectly match all the harsh requirements of the silicon negative electrode for high strength, high elasticity, strong interfacial adhesion and excellent electrochemical stability, thereby showing comprehensive performance far superior to that of traditional binders.

The application relates to a high-molecular protective film, a preparation method and application thereof. The PE film material is a temporary packaging or covering material commonly used in outdoor construction, which is cost-effective but has the defects of easy wrinkles, breakage and dust adsorption. In view of the defects in the prior art, the application provides a high-molecular protective film material which comprises an integrally-formed adhesive layer and a protective layer; the raw material ratio of the adhesive layer is as follows: 150-170 parts of low-density polyethylene, 75-86 parts of starch, 8-11.2 parts of chitosan and 2-6 parts of a crosslinking agent; the raw material of the protective layer is 240-260 parts of low-density polyethylene, and a sunscreen or light stabilizer can be further added. The inner and outer layers of the high-molecular protective film have different characteristics, the inner layer introduces biodegradable materials such as starch and chitosan based on the low-density polyethylene, and has good wrinkle resistance, dust prevention, sunscreen and degradable characteristics, and is especially suitable for being used as a temporary packaging material in outdoor construction.

The invention relates to the technical field of electronic adhesives, and discloses an electronic adhesive for manufacturing a flexible circuit and a preparation method thereof.The preparation method comprises the steps that bisphenol A epoxy resin, fluorine-containing polyurethane, modified chitosan, diaminodiphenylmethane and a defoaming agent BYKA555 are added into a reactor and evenly stirred, the stirring temperature is 100-110 DEG C, stirring is conducted for 2-3 h, vacuum defoaming, injection molding and curing are conducted, and the flexible circuit is obtained. The electronic glue for manufacturing the flexible circuit is obtained. The electronic glue for manufacturing the flexible circuit, provided by the invention, has relatively good flame-retardant, stain-resistant and tensile effects.

The present invention refers to novel compositions based on deacetylated chitin nanowhiskers (CsNWs) as well as to processes for their preparation. Furthermore, the invention relates to a process for preparing films or coatings starting from said compositions as well as to biomedical, cosmetic articles based upon said compositions and uses thereof.

A tissue adhesive material that provides fast and robust adhesion even on tissue surfaces covered in bodily fluids. The tissue adhesive material is formed of a hydrophobic matrix and a plurality of bioadhesive microparticles dispersed within the hydrophobic matrix configured such that disposing the adhesive material directly on a fluid covered surface and applying pressure causes the (a) hydrophobic matrix to repel the fluid, (b) the bioadhesive particles to compress forming an adhesive layer, and (c) the bioadhesive particles to form temporary crosslinks followed by covalent crosslinks with the surface.

The invention belongs to the field of liquid adhesive materials, and particularly relates to an adhesive material with reversible tensile universal adhesion as well as a preparation method and application of the adhesive material. The preparation method of the adhesive material comprises the following steps: S1, mixing deionized water and acidic polysaccharide with the weight-average molecular weight of 0.8-2 MDa, and stirring until the mixture is dissolved to obtain an acidic polysaccharide solution; s2, adding an inorganic metal salt into the acidic polysaccharide solution, and stirring until the inorganic metal salt is dissolved to obtain a precursor solution; and S3, adding concentrated hydrochloric acid into the precursor solution, stirring until the system is viscous, standing, and self-assembling, thereby obtaining the product, the addition amount of the concentrated hydrochloric acid is 0.1-0.325 wt% of the mass of the deionized water. The adhesive material prepared by the method has high energy dissipation efficiency and super-long reversible stretch rate, can effectively bear transient impact load caused by a high-speed moving target, provides stable adhesion, and is suitable for stable adhesion of various complex structure surfaces.

A tissue adhesive material that provides fast and robust adhesion even on tissue surfaces covered with body fluids. [Solution] The tissue adhesive material is formed from a hydrophobic matrix and a plurality of bioadhesive microparticles dispersed within the hydrophobic matrix, and is configured such that disposing the adhesive material directly on a fluid-covered surface and applying pressure to the adhesive material causes (a) the hydrophobic matrix to repel the fluid, (b) the bioadhesive particles to compress and form an adhesive layer, and (c) the bioadhesive particles to form temporary crosslinks and then covalent crosslinks with the surface.

Systems, methods, and kits are described for repairing a fibrocartilage defect in a subject. The fibrocartilage defect is contacted with a first composition containing an oxidized and methacrylated glycosaminoglycan to form an imine bond between the glycosaminoglycan and the fibrocartilage defect, thereby coating the fibrocartilage defect with the glycosaminoglycan. The fibrocartilage defect coated with the glycosaminoglycan is then contacted with a mixture of a pre-polymer hydrogel composition containing a first crosslinking unit that, when polymerized, is capable of bonding to methacrylate and a hydrogel polymerization initiator composition, thereby forming a hydrogel that is covalently bonded to the glycosaminoglycan through methacrylate.

The present application belongs to the technical field of adhesives, and particularly relates to a wood adhesive based on microcrystalline cellulose for capturing carbon dioxide as well as a preparation method and application thereof. The present application first mixes microcrystalline cellulose, 1,8-diazabicyclo[5.4.0]undec-7-ene, dimethyl sulfoxide and water, introduces carbon dioxide gas into the obtained reaction solution under oil bath conditions to perform an activation reaction, second mixes the obtained MCC@CO2 slurry, chitosan and a phenolic enhancer (or without adding the phenolic enhancer) to perform heating and dissolution, adds acid into the obtained mixture to adjust the pH value, and obtains the wood adhesive based on microcrystalline cellulose for capturing carbon dioxide. The wood adhesive based on microcrystalline cellulose for capturing carbon dioxide has a low curing temperature, excellent bonding strength, stability and water resistance, and the prepared plywood meets the requirements (wet strength ≥ 0.7 MPa) of GB / T 9846-2015 on the type II plywood.