430results about "Protein adhesives" patented technology

The invention provides a leather product and a method for manufacturing the leather product. The leather article comprises a substrate and a coating comprising a cellulose derivative with improved color fastness to rubbing, the cellulose derivative may be methylcellulose, ethylcellulose, ethylmethylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methylcellulose, hydroxypropyl methylcellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, or carboxymethyl cellulose. The cellulose acetate-cellulose acetate composite material is prepared from ethyl hydroxyethyl cellulose, cellulose acetate, cellulose triacetate, cellulose propionate, cellulose acetate propionate, cellulose acetate butyrate, microcrystalline cellulose, cellulose nitrate or cellulose sulfate.

The invention discloses a preparation method of a green adhesive with a biomimetic mineralization structure, which comprises the following steps: dissolving polysaccharide in deionized water, adding calcium salt, stirring, adding carbonate into the mixture, and inducing crystal nucleation of CaCO3 biominerals by using the polysaccharide as an organic template and adsorbing calcium ions and carbonate ions layer by layer, thereby obtaining the green adhesive with the biomimetic mineralization structure. After the growth reaction is finished, products are collected through vacuum filtration, and CaCO3 biominerals are obtained; and finally, mixing the soybean protein with deionized water, then adding the CaCO3 biomineral for ultrasonic treatment, and then adding the plant polyphenol to establish a compatible interface between the CaCO3 biomineral and the soybean protein, thereby obtaining the green adhesive with the biomimetic mineralization structure. The green adhesive prepared by the preparation method disclosed by the invention has strong adhesive power and multifunctionality, and is green and environment-friendly.

The invention discloses a water-resistant broussonetia papyrifera leaf protein wood adhesive and a preparation method thereof, and the water-resistant broussonetia papyrifera leaf protein wood adhesive comprises the following components by weight: 2.4 parts of a protein denaturant I; 0.3 part of a protein denaturant II; 120 parts of a dispersion medium; 30 parts of a broussonetia papyrifera leaf protein extract; and 30 parts of a cross-linking agent. The preparation method comprises the following steps: mixing the protein denaturant I, the protein denaturant II and the dispersion medium, fully dissolving, adding the broussonetia papyrifera leaf protein extract, heating at constant temperature, adding the cross-linking agent into the mixture, and continuously heating at constant temperature for reaction to obtain the water-resistant broussonetia papyrifera leaf protein wood adhesive. The wood adhesive is prepared by taking the broussonetia papyrifera leaf protein as a main raw material, a new raw material source of the biomass-based wood adhesive is developed, the problems of raw material greenization, low cost and sustainable supply are solved, and the economic utilization value of broussonetia papyrifera resources is also remarkably improved; the preparation method is simple, and the prepared broussonetia papyrifera leaf protein wood adhesive has excellent water resistance, mechanical strength and comprehensive performance.

The invention belongs to the field of binders, and particularly relates to a flame-retardant binder as well as a preparation method and application thereof. The preparation method of the flame-retardant binder comprises the following steps: uniformly stirring and mixing a biomass raw material and a solvent to obtain a biomass solution; uniformly stirring and mixing a cross-linking agent and the biomass solution to obtain a precursor solution with the solid content of 5-50wt%; and adjusting the pH value of the precursor solution to 3-5 to prepare the flame-retardant binder. According to the invention, the biomass raw material and the cross-linking agent are taken as raw materials, the construction of a cross-linked network is realized by taking pH as driving force, and the bio-based adhesive with the advantages of high adhesive property, high flame retardant property, recoverability, environment friendliness and the like is prepared by controlling the solid content of a precursor solution and the pH of a system; the method can be applied to preparation of products such as a multilayer plate composite material, a particle plate composite material, a coating composite material and a flame-retardant film, and has wide practical application.

The invention discloses a bamboo longitudinal and wood transverse composite whole container bottom plate and a preparation method thereof, and belongs to the field of bamboo-wood composite materials. The bottom plate is of a seven-layer alternate paving structure and is formed by compositing transverse wood veneer layers and longitudinal radial bamboo curtain layers, wood veneers are made of lignin modified polyurethane adhesive (reinforced by nano-silicon dioxide), and bamboo curtains are made of bamboo fiber nano-crystal reinforced soybean protein adhesive (cross-linked by genipin). Through continuous paving, fixed-length saw cutting and a'cold-in-cold-out 'hot pressing process (the pressure is 1.5-8.0 MPa, and the temperature is 140-220 DEG C), whole-piece production of any length is achieved. According to the technology, the bamboo-wood interface bonding problem is solved, the bending strength reaches 120 MPa, the interlayer shear strength is 7.8 MPa, the strength retention rate after damp-heat aging resistance is 90%, the formaldehyde emission is smaller than or equal to 0.05 mg / m < 3 >, the bio-based carbon content is 85%, high strength, weather resistance and environment friendliness are achieved, a traditional spliced container bottom plate can be replaced, the material utilization rate is increased by 20% or above, and the manufacturing cost is remarkably reduced.

The invention relates to the technical field of adhesives, and provides a wet state maintaining type vegetable protein adhesive as well as a preparation method and application thereof. The hyperbranched catechol polymer adhesive filler disclosed by the invention is prepared by carrying out ring-opening reaction on epoxy groups of neopentyl glycol diglycidyl ether and pentaerythritol tetraglycidyl ether and amino groups of dopamine hydrochloride. Meanwhile, the vegetable protein adhesive is prepared from vegetable protein, a cross-linking agent and the adhesive filler according to a certain proportion. According to the adhesive filler and the corresponding vegetable protein adhesive, the defect that in the prior art, a bio-based adhesive, especially a vegetable protein adhesive, is poor in product performance due to poor moisture retention can be overcome.

The invention discloses a preparation method of a novel environment-friendly water-resistant adhesive for a thermo-sensitive paper label, and relates to the technical field of adhesive preparation. The preparation method comprises the following steps: firstly, carrying out graft copolymerization on tannic acid to generate a spinning solution, preparing micron-sized polyurethane elastic fibers, introducing a plurality of phenolic hydroxyl groups into soybean protein, forming a new compact network structure with the protein to prevent invasion of water molecules, and cooperating with microwaves to change an aggregation mode among protein molecules and improve the hydrophobicity of the soybean protein; phenolic hydroxyl is used as a hydrogen donor to resist oxidation and improve the viscosity of the adhesive; the modified starch is esterified by amino acetyl chloride, so that the compatibility is improved, the modified starch and the epoxy resin form a mutual cross-linked net structure, and the modified starch and the polyurethane elastic fibers can form a chain structure, and the mechanical bonding performance of the adhesive is improved; in addition, green and environment-friendly raw materials are adopted, so that the adhesive can be biodegraded, and novel and environment-friendly effects are achieved. The adhesive prepared by the invention has the effects of environmental protection, high viscosity and water resistance.

The invention discloses a high-strength anti-freezing vegetable protein adhesive based on multi-scale structure regulation and a preparation method thereof. The vegetable protein adhesive is mainly prepared from the following raw materials: vegetable protein meal, an anti-freezing modifier, modified cellulose nanocrystals, a chemical cross-linking agent and a dispersion medium. Wherein the components comprise 30 parts of vegetable protein meal, 10-15 parts of an anti-freezing modifier, 0.5-1.2 parts of modified cellulose nanocrystals, 4-6 parts of a chemical cross-linking agent and 70 parts of a dispersion medium. The invention provides a high-strength anti-freezing vegetable protein adhesive based on multi-scale structure regulation and control, which breaks through the bottleneck of low-temperature freezing and brittleness of the traditional adhesive, effectively solves the problem of poor performance of the vegetable protein adhesive in a low-temperature environment, fills up the blank of a bio-based adhesive in the low-temperature field, and has a wide application prospect. The anti-freezing performance, the bonding strength, the environment-friendly performance and the sustainability are excellent.

The invention discloses a tough and mildew-proof formaldehyde-free soybean protein adhesive as well as a preparation method and application thereof, defatted soybean powder is taken as a main agent, an epoxy compound is taken as a cross-linking agent, polyethyleneimine modified chitosan is used for synthesizing a modifier to prepare the modified soybean protein adhesive, and a compact cross-linked network structure is constructed, so that the toughness and mildew-proof formaldehyde-free soybean protein adhesive is obtained. According to the soybean protein-based adhesive, the performance of the soybean protein-based adhesive is successfully improved, the soybean protein-based adhesive is high in bonding strength, relatively good in water resistance and good in mildew resistance, the production process is simple and convenient, the production cost is greatly reduced, chitosan and polyethyleneimine are subjected to graft modification, the living environment of mildew is destroyed, and the mildew resistance of the soybean protein-based adhesive is improved. The epoxy compound and the chitosan-polyethyleneimine are compounded and cooperated, so that a stable net-shaped cross-linked structure is formed in the adhesive, and the water resistance and the mildew-proof capability of the adhesive are greatly improved.

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 present invention relates to a silk fibroin-based underwater adhesive and a preparation method thereof. The method of the present invention uses natural silk as a raw material. After degummed silk is dissolved in a formic acid solution of inorganic salt, the silk fibroin / inorganic salt / formic acid solution is then coated on the part of the substrate that needs to be adhered, and immersed in water to obtain an adhesive that can adhere to the surfaces of various substrates underwater. The underwater adhesive prepared by the present invention is simpler in preparation, more convenient to use, lower in cost, green and environmentally friendly compared with other underwater adhesives, and has excellent adhesion ability. At the same time, the underwater adhesive prepared by the present invention has a wide range of raw material sources, can be rapidly degraded under certain conditions, has a certain promoting effect on resource and environmental protection, and has broad application prospects in the fields of packaging materials, medical materials, ship materials, etc.

The invention relates to a preparation process of high-performance green flame-retardant plywood, which comprises the following steps: synthesis of a cross-linking agent furandicarboxylic acid-NHS active ester (FDCA-NHS), preparation of a high-temperature meal adhesive, preparation of waterborne epoxy resin, preparation of an L-Trp-DOPO inorganic phosphorus-containing flame retardant, preparation of an epoxy resin flame-retardant material, preparation of the high-performance green flame-retardant plywood and the like. The preparation method creatively combines the esterification reaction, the phase inversion method, the chemical one-step method, the hot pressing method and other preparation methods, the prepared high-performance green flame-retardant plywood has the advantages of being good in mechanical property, excellent in flame retardance and the like, has the characteristics of being wide in raw material source, high in renewability, high in reaction activity and the like, conforms to the green and environment-friendly concept and has wide application prospects. The plywood is wide in application field and wide in application prospect.

The invention relates to the field of adhesives, and discloses a dialdehyde lignin and dialdehyde protection lignin adhesive as well as a preparation method and application thereof. The method comprises the following steps: adding a dialdehyde solution and acid into the wood biomass and 1, 4-dioxane, and reacting at 75-95 DEG C for 3-7 hours; carrying out solid-liquid separation to obtain a liquid component, adjusting the pH value, and adding the liquid component into water; and carrying out solid-liquid separation to obtain a solid component, and cleaning and drying to obtain the dialdehyde lignin. The preparation method comprises the following steps: dissolving gelatin in an alkali solution, adding borate, nano-hydroxyapatite and dialdehyde lignin, and uniformly dispersing to obtain the dialdehyde protected lignin adhesive. The plywood prepared from the adhesive shows excellent mechanical properties, the wet strength of the plywood is larger than or equal to 1.0 MPa and the dry strength of the plywood is 2.2 MPa under the hot pressing condition of 120 DEG C, the flame retardant property, the heat stability and the moisture-proof stability of the plywood are remarkably improved, and the plywood further has the good mildew-proof characteristic.

The invention discloses a vegetable protein-based bamboo and wood adhesive, a preparation method thereof and application of the vegetable protein-based bamboo and wood adhesive in a thin shaving board. The vegetable protein-based bamboo and wood adhesive is prepared from the following raw materials: cake meal isolated protein, a silane coupling agent and a composite modifier, the composite modifier is prepared from the following raw materials: pullulan modified with aldehyde groups and a compound modified with boric acid ester bonds; the compound modified with the boric acid ester bond is prepared from the following raw materials: ellagic acid and 4-hydroxymethyl phenylboronic acid. According to the vegetable protein-based bamboo wood adhesive provided by the invention, the flame retardant property is improved.

This invention discloses adhesive compositions useful for providing cohesive strength to particles, for example a mat of wood particles produced while making particleboard prior to curing. The adhesive compositions has a) one or more biopolymers and b) one or more monomers or oligomers. An oligomer may have a degree of polymerization of 4 or less. The weight ratio of the monomer / oligomer to the biopolymer is optionally between 30:70 and 80:20. Optionally, the adhesive compositions may be combined with an isocyanate. The adhesive composition may be used to make no added formaldehyde wood composites such as particleboard.

The invention discloses a high-strength and high-water-retention soybean meal-based adhesive and a preparation method thereof.The high-strength and high-water-retention soybean meal-based adhesive is prepared from, by weight, soybean protein meal, glucose oxidase, calcium sulfate oligomer, ethylene glycol diglycidyl ether and a dispersion medium, and the preparation method comprises the following steps that all the components are weighed according to the mass ratio; the preparation method comprises the following steps: dispersing glucose oxidase in a dispersion medium, uniformly dispersing soybean protein meal in the glucose oxidase dispersion liquid prepared in the step S1, heating for reaction, uniformly dispersing a calcium sulfate oligomer in the soybean protein meal dispersion liquid oxidized and catalyzed by the glucose oxidase prepared in the step S2, and uniformly dispersing the calcium sulfate oligomer in the soybean protein meal dispersion liquid oxidized and catalyzed by the glucose oxidase. And uniformly dispersing ethylene glycol diglycidyl ether in the dispersion liquid obtained in the step S3, and then stirring for 5 minutes. The adhesive disclosed by the invention has excellent properties in the aspects of bonding strength, water retention capacity, mildew resistance and sustainability.

The invention discloses a preparation method of a silk fibroin-polydopamine water-based binder, the silk fibroin-polydopamine water-based binder and application of the silk fibroin-polydopamine water-based binder. The preparation method comprises the following steps: (1) removing sericin from silkworm cocoons by using a sodium carbonate solution, drying, and dissolving degummed silk by using a lithium bromide solution; (2) dialyzing the solution dissolved in the step (2), and freeze-drying I to obtain water-soluble silk fibroin; (3) dissolving the obtained water-soluble silk fibroin in water to obtain a silk fibroin solution; and (4) adding dopamine hydrochloride into the silk fibroin solution for reaction, and performing freeze drying II to obtain the silk fibroin-polydopamine water-based binder. The binder prepared by the invention can effectively improve the ionic conductivity of a positive electrode and the transmission efficiency of sodium ions, and effectively improve the cycle performance and rate capability of a battery.

The invention provides a high-strength gelatin-based artificial board adhesive and a preparation method thereof, and aims at solving the problems that an existing gelatin-based adhesive is poor in water resistance and not high in bonding strength, and processability is not easy to regulate and control. Gelatin is used as a main raw material, dialdehyde starch and waterborne polyamide epichlorohydrin are combined as cross-linking agents, magnesium-aluminum hydrotalcite is used as a modified filler, fenugreek gum is used as a tackifier, polyvinyl alcohol is used as a modification additive, and the high-strength gelatin-based adhesive is prepared through a specific process. The preparation method comprises the following specific steps: preparing a gelatin aqueous solution, a fenugreek gum tackifier, a polyvinyl alcohol aqueous solution and dialdehyde starch, and uniformly mixing the components to obtain the adhesive. According to the technical scheme, through multiple crosslinking effects, the adhesive is endowed with excellent bonding strength, water resistance and good processability, the raw materials are environment-friendly and non-toxic, the adhesive is suitable for manufacturing artificial boards such as plywood, and the quality and performance of the artificial boards are effectively improved.

The invention provides a heat-conducting vegetable protein-based composition, a heat-conducting vegetable protein adhesive as well as a preparation method and application of the heat-conducting vegetable protein-based composition and the heat-conducting vegetable protein adhesive. The heat-conducting vegetable protein-based composition provided by the invention is prepared by ball-milling raw materials including a heat-conducting filler, modified vegetable protein and (3-(methacrylamido) propyl) trimethyl ammonium chloride in a mass ratio of 1: (0.3-5): (0.03-1) for 15-25 hours. The heat-conducting vegetable protein adhesive comprises the following raw materials in percentage by weight: 6-20% of the heat-conducting vegetable protein-based composition and 3-8% of a cross-linking agent, and further comprises 0.1-3% of a flame-retardant reinforcing agent on the basis of the heat-conducting vegetable protein-based composition and the cross-linking agent. The heat-conducting vegetable protein adhesive provided by the invention adopts the heat-conducting vegetable protein-based composition, has good cementing performance and water resistance, also has good heat conductivity, flame retardance and mildew resistance, is beneficial to preparation of multifunctional materials, and is beneficial to industrial application, especially in the field of artificial board industry.

The invention relates to the technical field of adhesives, in particular to a cottonseed protein-based environment-friendly adhesive for plywood and a preparation method of the cottonseed protein-based environment-friendly adhesive. The cottonseed protein-based environment-friendly adhesive for plywood is composed of gene modified cottonseed protein isolate, double modified starch, an intelligent cross-linking agent system, a reinforced fiber system and the like. The cottonseed protein is subjected to gene editing and hydrophilic modification, and the starch is grafted with the nano silicon dioxide through esterification; the cross-linking agent contains a temperature-sensitive material and a dynamic cross-linking unit, and the reinforced fibers are nanocellulose and graphene oxide compounds; various functional auxiliaries are supplemented, and all the components have a synergistic effect, so that the high-performance environment-friendly adhesive is formed. The adhesive is mainly prepared from natural raw materials and is free of formaldehyde release; through gene modification, intelligent crosslinking and other technologies, the fluidity, the bonding strength and the water resistance are improved, and the bonding strength after boiling in boiling water is larger than or equal to 0.7 MPa; storage is stable, the process is simple, cost is low, and green development of the plywood industry is promoted.

The invention belongs to the technical field of adhesives, and particularly relates to a high-strength mildew-proof vegetable protein adhesive as well as a preparation method and application thereof. The plant protein water-based paint comprises the following components: 10-30% of plant protein, 50-80% of water, 1-6% of a thickening agent, 0.25-2.5% of an activating agent, 0.25-2.5% of a stabilizing agent, 1-4% of a polymer mildew preventive, 0.25-0.5% of a nano reinforcing agent and 0-7% of a pH value regulator. The plant protein adhesive disclosed by the invention can be cured under an ambient temperature condition, realizes water-resistant gluing, is high in viscosity, and does not contain toxic and harmful substances such as free formaldehyde and free benzene compounds, so that the adhesive is completely green, and the problem of volatile organic compound pollution caused by artificial boards and wood products thereof is effectively solved; in addition, agriculture and forestry biomass raw materials are effectively utilized, green energy conservation and emission reduction of the plywood industry are achieved, and the method has huge application value.

The instant disclosure relates to an engineered wood precursor mixture. The engineered wood precursor mixture can include a plurality of wood components and a binder reaction mixture. The binder reaction mixture is present in a range of from 3 parts to 25 parts per 100 parts of the dry weight of the plurality of wood components. The binder reaction mixture includes an aqueous portion including a glycerol component. The glycerol component includes glycerol or an oligomer of glycerol in a range of from 5 wt % to 65 wt % or 5 wt % to 50 wt %, based on the dry weight of the binder reaction mixture. The binder reaction mixture further includes an at least partially non-dissolved polypeptide-containing component comprising soy flour, wheat gluten, corn protein isolate, or a mixture thereof, in a range of from 20 wt % to 85 wt %, based on the dry weight of the binder reaction mixture.

The present disclosure relates to an aqueous dispersion binding agent for use in the manufacture of medium density fiberboard (MDF) and high-density fiberboard (HDF). The aqueous binding agent comprises a polyol component, soy flour, a sulfite agent, a surfactant, and an anti-foam agent. The present disclosure also provides a method for making MDF and HDF using an aqueous binding agent.

The present disclosure relates to a method for making fiberboard with a system comprising a plug flow screw, a cooker, a refiner, a blowline, and a press. The method comprises a), introducing woodchips to the plug flow screw; b). passing the woodchips through the plug flow screw to the cooker, c). adding a soy component having a protein dispersibility index (PDI) less than 50 to the cooker, d). passing the woodchips from step c) through the refiner to produce glued refiner wood fibers, e). passing the glued refiner wood fibers from d) through the blowhne to produce pressable wood fibers, f). optionally adding a water retardant, and g). pressing the pressable wood fibers under heat and pressure to form the fiberboard.

The invention belongs to the technical field of natural adhesives, and discloses a natural adhesive with coconut pectin biomass as a raw material and a preparation method thereof.The preparation method comprises the steps that coconut shell fibers, coconut meat residues and other coconut fruit waste are utilized, and active polysaccharide and vegetable protein are obtained through an oxidized saline water extraction technology; the composite adhesive is formed by self-assembly crosslinking of the modified starch, the polyvinyl alcohol, the modified starch and the epoxidized glyceryl polyether. The adhesive is high in bonding strength, the initial strength of 80% or above can still be kept after the adhesive is soaked in water, the content of VOCs is lower than 10 g / L, and the environment-friendly requirement is met. The problem of environmental pollution of a traditional petroleum-based adhesive is solved, meanwhile, the technical defects that an existing bio-based adhesive is insufficient in strength and poor in water resistance are overcome, a green and environment-friendly adhesive substitute is provided for the wood industry, and the production cost is remarkably reduced.

The invention belongs to the technical field of hydrogel adhesives, and relates to a Janus hydrogel adhesive and a preparation method thereof. The preparation method comprises the following steps: dissolving a monomer with a coordination group, a surfactant, a cross-linking agent, a thermal initiator, a pH regulator and a natural polymer with a strong adhesion site in water, and carrying out one-step thermal initiation polymerization in a manner of covering a hydrogel pre-solution with a specific metal plate to prepare the Janus hydrogel adhesive. An in-situ cross-linking reaction / coordination effect occurs at a metal interface, so that one side of a covering metal plate in the hydrogel achieves an anti-adhesion effect; through the synergistic effect of bonding sites such as a coordination group, a hydroxyl group and an amino group, the strong adhesion effect of one side, which is not covered with a metal plate, in hydrogel is achieved, so that the Janus hydrogel adhesive with asymmetric adhesion is obtained. The method is suitable for preparing asymmetric adhesive gel and postoperative anti-adhesion materials, is used in the fields of intelligent sensors, flexible electronic devices, ultrasonic couplants and the like, is simple and convenient in preparation process, low in cost and easy for large-scale production, and has potential application value.

The invention relates to the technical field of conductive adhesives, in particular to a conductive hydrogel adhesive with a temperature phase change characteristic for fixing a skin electrode, and the conductive hydrogel adhesive comprises the following components in parts by weight: 5-20 parts of a structural component; the gel is selected from at least one of gelatin, collagen, agar, chitosan, sodium alginate, gellan gum, methyl cellulose and xanthan gum; 1-5 parts of a conductive substance; 5-10 parts of a water retention component; and 50-70 parts of water. The prepared adhesive has excellent adhesive performance and conductivity, the material cost is low, the adhesive is green and environmentally friendly, the use method is simple and convenient, and optimal use of most electrodes in the market can be 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.

An orthodontic adhesive includes components capable of allowing easy debonding of an orthodontic device from a patient's tooth. The adhesive includes an engineered marine mussel protein. The adhesive may include at least one photocleavable moiety. The adhesive is applied in one or more individual layers. One of the components of the adhesive is capable of binding to a tooth and the other component may be capable of binding to an orthodontic device. A method of adhering an orthodontic device to a tooth includes applying a layer of an orthodontic adhesive to either the tooth or the orthodontic device or the tooth and the orthodontic device and affixing the orthodontic device to the tooth with the orthodontic adhesive situated between the tooth and the orthodontic device. The engineered marine mussel protein includes one or more catechol moieties or one or more derivatives of a catechol moiety.

The invention discloses a mildewproof and flame-retardant soybean protein adhesive and a preparation method thereof. The preparation method comprises the following steps: firstly, grafting phytic acid and cinnamyl aldehyde through catalytic esterification reaction, mixing soybean protein isolate and distilled water according to a ratio of 1: 9, mechanically stirring at room temperature for 30 minutes, regulating the pH value to 9-10 by adopting a sodium hydroxide solution in the stirring process, and then adding phytic acid cinnamyl aldehyde with different addition amounts to prepare the modified soybean protein adhesive. According to the invention, cinnamyl aldehyde derived from natural plant cinnamon is used as a modifier, so that the modifier is green, environment-friendly and renewable. The adhesive is high in wet shear strength, good in mildew resistance and flame retardance and simple in production process, and can be used in the field of artificial board manufacturing.