296results 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 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 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 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 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 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 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 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.

The invention relates to the technical field of bio-based formaldehyde-free adhesives, and aims to provide a preparation method and application of a high-strength and high-toughness bio-based adhesive. Through interface molecular structure design, a boron nitride nanosheet based on sulfydryl click chemical function modification is constructed, an interface mechanical interlocking and chemical multi-network cross-linking reinforcing and toughening integrated technology is innovated, and the preparation method of the boron nitride nanosheet intercalation modified reinforcing and toughening plant protein adhesive is provided. The characteristic of poor interfacial adhesion between the adhesive and the wood surface is obviously improved, and the bio-based adhesive with good water resistance, high strength, excellent toughness and wider application range is obtained. According to the present invention, the dry shear strength of the plywood prepared by using the high-performance, high-strength and high-toughness bio-based adhesive through hot pressing can achieve 2.56 MPa, the wet shear strength can achieve 1.32 MPa, the wet debonding work can achieve 1800 mJ, excellent strength and excellent toughness can be represented, the thermal stability and the fire resistance of the adhesive can be significantly enhanced, and the wide industrial application prospect can be provided.

The invention discloses a graft copolymerization modified high-water-retention formaldehyde-free adhesive as well as a preparation method and application thereof, and belongs to the technical field of adhesive preparation. The adhesive is prepared from the following components: deionized water, vegetable protein meal powder, cationic polyamide polyamine epichlorohydrin resin and an anionic moisturizing factor, wherein the anionic moisturizing factor is prepared from the following components: deionized water, an initiator, acrylamide, itaconic acid, chitosan, hydrochloric acid, N, N '-methylenebisacrylamide, 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and N-hydroxy succinimide. According to the invention, acrylamide, itaconic acid and chitosan are subjected to a graft copolymerization reaction, a moisturizing factor with negative charges is formed in situ in the process, and the moisturizing factor is compounded with polyamide polyamine resin with positive charges for use, so that not only can the water retention capacity of the plant protein adhesive be remarkably improved, but also the mechanical strength characteristic of the plant protein adhesive can be synchronously enhanced.

The invention relates to an environment-friendly flame-retardant cold-pressed adhesive and a preparation method thereof. The environment-friendly flame-retardant cold-pressed adhesive is prepared from the following raw materials in parts by weight: 14 to 21 parts of modified hydrosol, 5 to 15 parts of magnesium sulfate, 25 to 35 parts of magnesium chloride, 95 to 105 parts of magnesium oxide and 0.001 to 0.01 part of boric acid, and the modified hydrosol is prepared by carrying out oxidation cross-linking reaction on a propylene hard monomer and a hydrosol precursor in the presence of an oxidizing agent and a cross-linking agent. The adhesive obtained by compounding the modified hydrosol with magnesium oxychloride and magnesium oxysulfate inorganic glue has the advantages of high mechanical and bonding strength and good water resistance, and has a relatively good flame-retardant effect. The modified hydrosol provided by the invention has a cross-linked network and rich hydroxyl and carboxylic acid groups, so that the adhesive is endowed with excellent permeability and bonding strength, the mechanical strength of the adhesive is enhanced by the magnesium oxychloride inorganic glue, and the water resistance of the adhesive is enhanced by the magnesium oxysulfate inorganic glue. The invention further relates to plywood containing the environment-friendly flame-retardant cold-pressed adhesive and a preparation method of the plywood.

The disclosure provides leather articles and a method for making leather articles comprising a substrate and a coating comprising a cellulose derivative having improved colorfastness to rubbing. The cellulose derivative may be methyl cellulose, ethyl cellulose, ethyl methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, ethyl hydroxyethyl cellulose, cellulose acetate, cellulose triacetate, cellulose propionate, cellulose acetate propionate, cellulose acetate butyrate, microcrystalline cellulose, cellulose nitrate, or cellulose sulfate.

A biomimetic adhesive is provided that includes a polymer, such as zein, and one or more catechol- or gallol-containing compounds. The adhesive may also include an iron crosslinker, an interfacial crosslinker, or both an iron crosslinker and an interfacial crosslinker. Methods of making and using the adhesive are also provided.

This application discloses a salt spray resistant composite corrugated cardboard and its preparation method. The salt spray resistant composite corrugated cardboard is made by bonding a facing paper and a corrugated core paper together with an adhesive. The adhesive comprises the following raw materials in parts by weight: 40-60 parts of metal ion modified soybean protein adhesive; 10-20 parts of epoxy silane oligomer; the raw materials for preparing the metal ion modified soybean protein adhesive include polyvinylpyrrolidone, soybean protein, metal ions, and water in a mass ratio of (8-12):(15-25):(0.01-0.05):(70-100); the metal ions include at least one selected from magnesium ions, iron ions, sodium ions, copper ions, and aluminum ions. The corrugated cardboard obtained by this application exhibits good stability in a humid salt spray environment.

The invention discloses an adhesive compound with an adhesive property optimized based on metal hydroxides as well as a preparation method and application of the adhesive compound, and belongs to the technical field of biological adhesives. The present invention relates to an adhesive composition comprising an adhesive precursor consisting of a protein-polyphenol composite hydrogel and a hydrogen bond destructive small molecule compound capable of network reconstitution comprising beta-folding formation in aqueous phase grafting comprising a metal hydroxide having the characteristics of: (a) a hydration enthalpy value of from-1000 kJ / mol to-4000 kJ / mol; (b) a dissociation constant of from 6 pKa to 13.5 pKa; (c) a water exchange rate of 105 S <-1 > to 10 < 10 > S <-1 >. The adhesion compound can be networked to form an advanced structure when encountering water, not only can generate underwater lap joint shear strength of more than 1MPa, but also can tolerate underwater long-term soaking and temperature change from-196 DEG C to 100 DEG C, and meanwhile, the adhesion compound also has good biocompatibility, can meet the requirement of the environment in a human body on tissue adhesion safety, and has good application prospects. Stability suitable for in vivo tissue repair and industrial applications is exhibited.

A formulation comprises yeast, a carboxylic acid having two or more carboxylic acid moieties, and a solvent, wherein the solvent comprises water and methanol, ethanol, propanol, or isopropanol. Prefer

The invention is directed to an aqueous binder composition for MMVF fibres comprising one or more protein(s) of non-plant origin; one or more saccharides, a crosslinker comprising at least two azetidinium functional groups and at least one hydrophobic agent. Methods for producing MMVF fibres, MMVF fibre products and uses are also disclosed.

A method of reinforcing or repairing a bioprosthetic tissue for use as a prosthetic valve leaflet. The method includes evaluating a bioprosthetic tissue, identifying a defect in the bioprosthetic tissue, and selectively applying an adhesive to a surface of the bioprosthetic tissue at the defect prior to implantation in a patient.

This invention relates to protein-based adhesives that are capable to adhere to a substrate in a dry, wet, moist, or an aqueous environment. Particularly, said adhesives comprise a crosslinking agent and an elastin-like polypeptide (ELP) that contain tyrosine, lysine, cysteine, dihydroxyphenylalanine (DOPA) or trihydroxyphenylalanine (TOPA) amino acid residue, or a combination thereof, on the polypeptide chain of said ELP. Among others, the adhesives disclosed herein may find broad applications in medical treatments and surgical operations. Compositions and methods of use are within the scope of this application.

The invention relates to the technical field of adhesives, and discloses a soybean-based formaldehyde-free adhesive and a preparation method thereof. The adhesive prepared by the invention is prepared from the following raw materials in parts by weight: 30 to 40 parts of soybean protein powder, 5 to 10 parts of starch, 80 to 120 parts of deionized water, 3 to 8 parts of modified cross-linking agent, 2 to 5 parts of reinforcing filler, 2 to 6 parts of sodium hydroxide and 0.5 to 1.5 parts of defoaming agent, soybean protein powder is adopted as an aldehyde-free base material, a modified cross-linking agent, reinforcing filler and other auxiliaries are added, and the adhesive is endowed with excellent bonding strength, water resistance, antibacterial performance, flame retardance and the like. Wherein a large number of epoxy groups are introduced into the modified cross-linking agent and can react with active groups in soybean protein, so that the cross-linking density of the adhesive is improved, and the bonding strength, water resistance, flame retardance and the like of the adhesive are further improved; and the reinforcing filler improves the toughness of the matrix through physical filling, and endows the matrix with certain antibacterial property.

To achieve an adhesive for paper-covered boxes that exhibits enhanced durability under high temperature and high humidity environments, against warping or peeling of decorative paper, as compared with traditional adhesives, and which enables the manufacture of a paper-covered box.SOLUTION: An adhesive for paper-covered boxes comprises a main agent and a curing agent, wherein the main agent is a glue-gelatin solution containing at least one of glue and gelatin, and the curing agent is a water-soluble epoxy compound that dissolves in water at a room temperature of 25°C, and the addition amount of the water-soluble epoxy compound is 0.15 wt.% or more and 8 wt.% or less relative to the solid content of the glue or gelatin in the glue-gelatin solution.SELECTED DRAWING: None