1260 results about "Ester bond" patented technology

The invention relates to the technical field of polyurethane production, in particular to a polyurethane super-hydrophobic foam composite material for packaging and a preparation method thereof. The polyurethane super-hydrophobic foam composite material for packaging is prepared by reacting a component A and a component B according to a mass ratio of 100: (31.7-46.5), wherein the component A comprises polyether polyol X with high molecular weight and high activity, polymer polyol, a chain extender, a cross-linking agent, an organic metal catalyst, a tertiary amine catalyst, a foam stabilizer, a foaming agent, a flame retardant, inorganic filler and the like, and the component B is isocyanate modified by polyether polyol Y with high functionality. An ester bond, a rigid benzene ring group and a Si-O-Si chain segment are introduced into a polyether polyol molecular chain segment to improve the internal soft segment structure and chemical crosslinking density of the polyurethane foam, and the prepared super-hydrophobic polyurethane foam not only has excellent hydrophobicity and high temperature resistance, but also is low in density and good in mechanical property.

The invention relates to the technical field of high polymer materials, and particularly provides a self-repairing type UV curing alumite color layer coating and a preparation method thereof. The water-based ink is prepared from, by weight, 30-50 parts of polyurethane acrylic resin, 10-25 parts of modified acrylic oligomer containing dynamic covalent bonds, 2-5 parts of photoinitiator, 3-8 parts of hydrophobic modified nano filler and 1-3 parts of cross-linking agent, and the dynamic covalent bonds are selected from at least one of hydrazide bonds, boric acid ester bonds and Diels-Alder bonds. By introducing a gradient energy collaborative network of dynamic covalent bonds and quadruple hydrogen bonds, rapid self-repairing of the coating at normal temperature and thermal triggering recombination of deep damage are achieved, and meanwhile through the micro-phase separation design of the hydrophobic core-shell filler and the graft modified silicon carbide nanowires, the hydrolysis resistance is improved.

The invention discloses a neuraminidase-targeted drug-loaded nanoparticle as well as a preparation method and application thereof, and belongs to the technical field of pharmaceutical preparations. Polysialic acid and poly (lactic-co-glycolic acid) are connected through ester bond connection to obtain the drug-loaded nanoparticles with stable structure and performance, and the drug-loaded nanoparticles have the effect of targeting neuraminidase and also have high efficiency of entering cells; the antibiotic drug is further dispersed in the drug-loaded nanoparticles, the inflammation regulating agent is adsorbed on the surface of the drug-loaded nanoparticles, and the drug-loaded nanoparticles can deliver the antibiotic drug and the inflammation regulating agent to the pig Gleisseria in the pig body. According to the present invention, the antibiotic drug and the inflammation regulating agent are released under the acidic environment at the infection site in the pig body, such that the pig Gleisseria is efficiently killed, the inflammation damage caused by bacterial infection and the toxic damage of the antibiotic drug are reduced, and the good application prospect is provided in the preparation of the drug for preventing and / or treating the pig Gleisseria infection.

The invention relates to the technical field of automobile tires, and discloses a new energy automobile tire self-repairing sealing material adhered with mute cotton. The preparation method comprises the following steps: adding a modified polyurethane adhesive, C5 petroleum resin and a modified carbon nanotube filler into absolute ethyl alcohol, mixing to obtain a self-repairing liquid, adhering polyurethane cotton to the upper part of the self-repairing liquid, and drying to obtain the new energy automobile tire self-repairing sealing material adhered with the mute cotton. Disulfide bonds, boric acid ester bonds and imine bonds introduced into polyurethane through a chain extension reaction and diselenide bonds introduced into carbon nanotubes all belong to dynamic covalent bonds, so that the self-repairing performance of the material is improved; by introducing a rigid benzene ring and naphthyl aromatic structure, the mechanical property of the self-repairing sealing material is improved; the carbon nano tube can play a role in skeleton supporting in a polyurethane matrix, and the mechanical property of the material is further improved by introducing an adamantane rigid structure into the carbon nano tube.

The invention belongs to the technical field of functional polymer materials, and discloses MXene functionalized antibacterial self-healing hydrogel and application thereof. The hydrogel is obtained by mixing and reacting polydopamine modified MXene powder, modified chitosan and a polyvinyl alcohol solution in a first buffer solution. The dynamic network self-healing conductive hydrogel based on interaction of a dynamic boron ester bond, a Schiff base bond and a non-covalent bond is obtained and can be applied to a flexible strain sensor.

The invention relates to a degradable epoxy resin composite material with an adjustable curing speed, and a preparation method and a mild total recycling method thereof. Existing degradable epoxy resin has the problems of high cost, harsh degradation conditions and the like, and is difficult to meet the requirements of different application scenes on curing speed and temperature at the same time. The invention provides an epoxy resin composite material which comprises curing agent components (an epoxy resin amine curing agent and an ester-containing polythiol curing agent) and epoxy resin components (glycidyl ether epoxy resin, glycidyl amine epoxy resin and glycidyl ester epoxy resin). The cured composite material can be fully recycled through catalytic degradation under mild conditions by using a lewis acid and an amino group breaking ester bond mechanism, and the degradation product can be directly used as a curing agent, a toughening agent and a chain extender. The epoxy resin composite material disclosed by the invention not only has adjustable curing speed and high use performance, but also realizes environmental friendliness and resource recycling, and provides a new solution for sustainable development of epoxy resin.

The invention relates to the technical field of cables, in particular to a high-toughness halogen-free flame-retardant crosslinked cable and a preparation method thereof.High-density polyethylene, ethylene-vinyl acetate copolymer, modified MXene and auxiliaries are mixed and co-extruded, and ultraviolet radiation crosslinking is adopted to prepare a reinforcing layer of the cable; the preparation method comprises the following steps: firstly, coating MXene with dopamine, treating with tert-butyldimethylsilyl chloride, then grafting DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide), and then introducing double bonds on the composite MXene; a self-repairing polyurethane emulsion, modified MXene and a photoinitiator are blended to prepare a protective coating, the surface of the reinforcing layer is coated with the protective coating, light curing treatment is carried out, and the water-resistant and corrosion-resistant protective layer sleeve with the self-repairing surface is prepared; a chain extender containing boric acid ester bonds and disulfide bonds is added in the preparation of the self-repairing polyurethane emulsion, and pentaerythritol triacrylate is used as a photosensitizer.

The invention discloses a two-photon polymerization 3D printing photoresist based on a boric acid ester bond and a preparation method thereof. The photoresist comprises a functional monomer containing the boric acid ester bond, a multifunctional acrylate monomer and a two-photon initiator, according to the two-photon polymerization 3D two-photon printing photoresist prepared by adopting the functional monomer containing the dynamic boric acid ester bond to reinforce and toughen conventional acrylic ester, the performance of resin is regulated and controlled by using different types of boric acid ester monomers and adding different proportions of boric acid ester monomers, the mechanical strength of the obtained photoresist can be regulated and controlled, and the performance of the photoresist is improved. Different parameters such as printing effect, hot residual weight and the like can be selected for a final application scene, and the method has a very wide application prospect.

The invention discloses a light-moisture dual-curing underwater epoxy coating with a self-repairing function as well as a preparation method and a construction method of the light-moisture dual-curing underwater epoxy coating. The epoxy coating comprises a component A and a component B, wherein the mass ratio of the component A to the component B is (1.5-3.5): 1; the component A is prepared from the following raw materials: bisphenol F type epoxy resin, dynamic disulfide bond modified polysulfide rubber, boron nitride nanosheet and silicon carbide nanowire hybrid filler, a photoinitiator and a silane coupling agent; the component B is prepared from the following raw materials: moisture-cured polyether amine, a boric acid ester bond cross-linking agent and hydrophobic modified graphene oxide. According to the invention, a light-moisture dual-curing mechanism is adopted, ultraviolet irradiation initiates rapid surface curing, and then environmental moisture permeates to complete deep curing. The material provided by the invention has the advantages of rapid curing, excellent self-repairing function, significantly improved underwater adhesion and good thermal conductivity, and provides a new solution for rapid repairing and long-acting protection of underwater structures.

Aiming at the challenge of osteochondral defect repair, the invention provides a preparation method of a fiber-reinforced self-repairing hydrogel scaffold (SBPS). According to the method, phenylboronic acid modified sodium alginate, polyvinyl alcohol and fibroin nanofibers rich in beta-Sheet are utilized to form the hydrogel through dynamic boric acid ester bonds and hydrogen bonds. The SBPS hydrogel loaded with PDGF-BB is combined with the nanosheet containing LDH / ChS / TGF-beta3, so that multi-dimensional synergy of mechanical strengthening, sequential drug release (PDGF-BB is released in an early stage and TGF-beta3 / Mg < 2 + > is released in a later stage), ROS removal and endogenous repair is realized. The Mg < 2 + > concentration gradient effect further assists staged regulation (vascularized bone regeneration-cartilage matrix synthesis), and breaks through the limitation of a single factor. Experiments prove that the scaffold can effectively drive angiogenesis, stem cell recruitment and cartilage / bone differentiation in vivo and in vitro, and finally osteochondral regeneration with structure-function matching is achieved.

The invention relates to the technical field of polyester resin, and discloses a preparation method and application of super-weather-resistant HAA curing type extinction polyester resin, neopentyl glycol, a triazine phenyl imide diol monomer, binary acid, an esterification catalyst, an onium salt curing accelerator and the like are subjected to a reaction, and the super-weather-resistant HAA curing type extinction polyester resin is obtained. The triazine phenyl imide diol monomer has a phenyl imide ring and triazine ring structure with heat resistance and structural stability, is beneficial to improving the high temperature resistance and mechanical strength of a polyester resin powder coating paint film, shows higher impact resistance, contains a dialkyl side chain, and can be used for preparing the polyester resin powder coating after being introduced into a polyester molecular chain. The modified polyester resin can generate steric hindrance and shielding effects, inhibit contact between water molecules and ester bonds in polyester molecular chains and reduce hydrolysis reaction of ester groups, so that the hydrolysis resistance of the polyester resin is improved. And the paint film has the advantages of good ultraviolet aging resistance, high weather resistance and high gloss retention rate.

The invention discloses a cellulose coated diaphragm and a preparation method thereof in the field of lithium ion batteries, the diaphragm comprises alpha-cellulose pulp, a cellulose grafted phenylboronic acid-co-oligomeric ethylene oxide copolymer, a thermal response star zwitterionic polymer and nano aluminum oxide, and an N-methylmorpholine-N-oxide aqueous solution is adopted as a solvent system. The preparation method comprises the following steps: firstly synthesizing a cellulose grafted copolymer with dynamic borate bonds through atom transfer radical polymerization, then preparing a star polymer with thermal response arms and zwitter-ion terminals by taking cyclodextrin as a core, and finally mixing all the components to prepare coating slurry. And the composite diaphragm is prepared through the processes of coating, phase conversion, ultraviolet curing and drying. The diaphragm combines the thermal stability and lyophilic property of cellulose, forms a dynamic self-adaptive interface layer through the synergistic effect of two functional compounds, has the advantages of active safety protection, dendritic crystal inhibition, long cycle life and the like, and remarkably improves the comprehensive performance of the lithium ion battery.

The invention relates to the technical field of self-healing agents, in particular to a well cementation cement slurry self-healing agent and a preparation method thereof. The modified polyethylene glycol terephthalate polymer comprises the following components in parts by weight: 30-50 parts of modified polyethylene glycol terephthalate polymer, 2-10 parts of metal oxide, 5-15 parts of lithium silicate, 0.5-2 parts of persulfate, 0.1-1 part of bacillus subtilis and 1-5 parts of calcium lactate. The isosorbide can react with ester bonds in polyethylene glycol terephthalate, so that more hydroxyl groups are introduced, and the hydroxyl groups can interact with cement hydration products or metal oxides and lithium silicate to promote formation of new mineral phases at cracks. The generation of the new mineral phase is beneficial to filling and repairing cracks, and the self-healing of the cement paste is realized, so that the long-term stability of a well cementation structure is improved. Tetraethyl orthosilicate can cooperate with other components such as the modified polyethylene glycol terephthalate polymer to jointly promote the self-healing process of set cement.

The invention discloses an environment-friendly nano antibacterial PE (polyethylene) wood-plastic plate, which is prepared from wood flour, silane modified PE gel, glass fiber powder, nano cellulose, borax, acrylate resin and PE wax. According to the invention, through chemical bond connection between the silane modified PE gel and inorganic particles such as the glass fiber powder and the nano cellulose, and a toughening effect of the acrylate resin, mechanical properties such as tensile strength, bending strength and impact strength of the plate are greatly improved; through use of high-crystallinity nano-crystalline cellulose and modified wood flour, the hydrophobicity of the material is improved, meanwhile, due to the fracture and repair mechanism of boric acid ester bonds, the network structure is compact, water is difficult to permeate into a cross-linked network of PE / wood flour, and thus the water resistance of the board is improved; phosphonic acid and quaternary phosphonium salt ionic liquid in the silane modified PE gel have lasting antibacterial property; and the balance of water permeability and waterproofness is realized through a process of combining cross-linked gel, evaporation hole making and hot press molding.

The invention discloses a dynamic borate bond-based self-healing polyacrylic acid binder and a preparation method thereof. The dynamic borate bond-based self-healing polyacrylic acid binder comprises a polymer main chain and a dynamic cross-linking agent, the dynamic cross-linking agent is a polyol compound containing at least two pairs of ortho-hydroxyl groups; the polymer main chain is formed by copolymerizing the following monomers: an acrylic structural monomer, the molar fraction of which accounts for 85-94% of the total monomer; a functional monomer containing a boric acid group, wherein the molar fraction of the functional monomer accounts for 3-8% of the total monomer; the mole fraction of the flexible monomer containing the acrylate group accounts for 3-8% of the total monomer. Various stresses generated by different negative electrode materials in circulation can be effectively adapted and buffered through a network formed by dynamic boric acid ester bonds and reversible fracture and combination of the boric acid ester bonds, so that the service life of the battery is generally prolonged, the working temperature range of the battery can be remarkably widened, the low-temperature discharge capacity can be remarkably increased, and the high-temperature cycle life can be prolonged.

The invention discloses a reprocessable solid-solid phase change material based on dynamic borate bonds and a preparation method of the reprocessable solid-solid phase change material. Based on the mechanism that boric acid ester is subjected to ester exchange during thermal stimulation, a dynamic cross-linking agent containing boric acid ester is adopted for cross-linking a polyurethane prepolymer, polyethylene glycol is cross-linked through chemical bonds, the tensile strength and the elongation at break of the phase change material are improved, and the problem that the phase change material is prone to leakage in the phase change process is solved; besides, borate bonds belong to associated dynamic covalent bonds and can keep the crosslinking density of the material unchanged when ester exchange occurs under thermal stimulation, so that the thermal stability of the material is relatively good; the solid-solid phase change material disclosed by the invention is excellent in mechanical property, has a relatively high enthalpy value, can be reprocessed, and has an application prospect in the fields of thermal management, energy storage, infrared stealth and the like.

The invention discloses a baicalin and boric acid antibacterial peptide assembly and a preparation method and application thereof, belongs to the technical field of biological medicine, and provides a baicalin and boric acid antibacterial peptide assembly which comprises baicalin and boric acid antibacterial peptide. The amino acid sequence of the boric acid antibacterial peptide is one of SEQ ID NO. 1, SEQ ID NO. 2, SEQ ID NO. 3, SEQ ID NO. 4, SEQ ID NO. 5 or SEQ ID NO. 6. According to the baicalin and boric acid antibacterial peptide assembly, phenylboronic acid molecules introduced to the C end of boric acid antibacterial peptide polypeptide can form boric acid ester bonds with the baicalin, the water solubility and membrane permeability of the baicalin can be improved, the baicalin can enter bacterial cells more easily to play a role, and the baicalin and the boric acid antibacterial peptide can form a multi-target synergistic antibacterial effect; therefore, the antibacterial effect is obviously improved.

The invention discloses an optical adhesive with dynamic bond exchange and gradient curing functions and a preparation method thereof, relates to an optical adhesive, and aims to solve the problems of interface failure and light transmission attenuation which are easy to occur in the existing optical adhesive. The invention starts from the following three points: 1, two-stage dynamic covalent cross-linking: 1, UV (ultraviolet) initiates acrylate polymerization to form a main network; part of unreacted epoxy groups are retained. 2, thermally activating dynamic boric acid ester bond exchange to realize network reconstruction and stress release; 2, a dual-wavelength gradient initiation system: a 365nm UV curing surface and a 405nm LED penetrate through a curing deep layer to avoid an uncured layer caused by oxygen inhibition; 3, a nano composite anti-reflection technology: mesoporous SiO (at) TiO core-shell nanoparticles (refractive index gradient matching) improve the light transmittance to gt; the content is 99.5%.

The invention relates to the technical field of organic silicon elastomers, in particular to a multi-synergistic self-repairing polysiloxane elastomer and a preparation method thereof, and the preparation method is based on a dynamic borate bond and imine bond synergistic preparation process and a hydrogen bond and dynamic borate bond / imine bond synergistic preparation process. Compared with a single dynamic imine bond or borate bond self-repairing system, the preparation method of the multi-synergetic self-repairing polysiloxane elastomer has the advantages that the mechanical property and the self-repairing efficiency of a material are improved by utilizing a strong and weak dynamic bond synergetic system, the process for preparing the organic silicon elastomer is simple, convenient and feasible, the reaction period is short, and the cost is low. The reaction can be completed under the room temperature condition, the self-healing condition is mild, a sample can be self-repaired only under the room temperature condition, industrial production and practical application are greatly facilitated, and the method is expected to be applied to sealing materials and flexible electronic devices. The used raw materials are commercially available, so that large-scale production in industrialization is facilitated.

The invention relates to a washing and / or cleaning agent, comprising at least one peptide and at least one enzyme which has hydrolytic activity on an ester bond, preferably selected from lipase and esterase, in particular esterase with lipolytic activity, particularly preferably lipase, wherein the peptide is suitable for adhesion to a fat- and / or oil-containing surface or to a surface coated with fat and / or oil or to a surface provided with at least one fat- and / or oil-containing soil, wherein the surface consists of hard surfaces, more preferably surfaces containing or consisting of ceramic (e.g. porcelain, earthenware), metal, steel, stainless steel, plastic, glass, natural and artificial stone, painted and enamelled surfaces, wood, laminate, linoleum and mixtures thereof, particularly preferably tableware (preferably made of ceramic such as porcelain or earthenware and plastic), metal (e.g.cutlery or pots) or glass and mixtures thereof, particularly preferably tableware (preferably made of ceramic such as porcelain or earthenware and plastic), metal (e.g. cutlery or pots) or glass, and / or textiles, more preferably textiles containing or consisting of cotton, polyester, polyamide, polypropylene and mixtures thereof, particularly preferably cotton, polyester and mixtures thereof. Furthermore, the invention relates to methods for cleaning hard surfaces and / or textiles, and to the use of such peptides and agents for improving the cleaning performance on at least one greasy and / or oily soil.

The invention discloses a preparation method of recombinant collagen nano-composite hydrogel for repairing wounds infected by multiple drug-resistant bacteria, which comprises the following steps: binding copper porphyrin pi-pi on titanium carbide nanosheets to form MXene coated CuTCPP nanoparticles, and carrying out amidation reaction on 3-aminophenylboronic acid and recombinant collagen to obtain the recombinant collagen nano-composite hydrogel for repairing wounds infected by multiple drug-resistant bacteria. MXene coated CuTCPP is doped into a modified recombinant collagen system and mixed with a polyvinyl alcohol solution, and the recombinant collagen nano-composite hydrogel is prepared. The self-healing property endowed by the dynamic cross-linking characteristic of the phenylboronic acid ester bond in the composite hydrogel disclosed by the invention can be highly adapted to irregular wounds; the nano particles with the heterojunction structure can be combined with photothermal therapy and photodynamic therapy to efficiently sterilize wounds; the hydrogel has the antibacterial property and the property of promoting wound healing, and can comprehensively and efficiently treat wounds infected by multiple drug-resistant bacteria.

The invention discloses a modified organic silicon marine antifouling paint and coating based on dynamic crosslinking of boric acid ester, and the modified organic silicon marine antifouling paint based on dynamic crosslinking of boric acid ester comprises the following components in parts by weight: 20-40 parts of a component A; 4-10 parts of a component B; 1-3 parts of a component C; wherein the component A comprises hydroxyl-terminated polydimethylsiloxane, borate modified polysiloxane, an auxiliary agent, a pigment filler and a first solvent, the component B comprises a curing agent and a second solvent, and the component C comprises a catalyst and a third solvent. Hydrolysis of boric acid ester bonds increases the hydrogen-bond interaction between the coating and a base material, and meanwhile, ether groups are introduced to strengthen the hydrogen-bond interaction effect, so that the coating can be firmly adhered to the intermediate paint in a seawater soaking environment.

The invention belongs to the technical field of photocuring, and relates to a carbonyl difluorene (ketone) oxime ester compound, a product containing the same and application of the carbonyl difluorene (ketone) oxime ester compound. Specifically, the structure of the compound is shown as a formula (A), and compared with an existing commercial photoinitiator, the probability of oxime ester bond breakage is reduced, and material storage and transportation are facilitated. # imgabs0 #

The invention discloses a recoverable benzoxazine / fiber composite material and a preparation method thereof, and belongs to the technical field of composite materials. The composite material is obtained by hot-pressing and curing degradable benzoxazine containing boric acid ester and fibers according to the mass ratio of 1: (0.1-0.8), the degradable benzoxazine containing the boric acid ester is obtained by reacting diphenol containing a boric acid ester structure, long-chain monoamine and paraformaldehyde according to a molar ratio of 1: 2: (4.1-4.4). The composite material prepared by the invention is obtained by hot-pressing and curing the degradable benzoxazine containing boric acid ester and the fiber, and the reversible boric acid ester bond endows the benzoxazine with excellent degradability and endows the composite material with excellent recoverability, so that the fiber can be reused. In addition, the composite material contains boron element, so that the composite material has excellent flame retardant property. The prepared composite material has wide application prospects in the fields of buildings, traffic, military industry and the like.

The invention relates to the technical field of materials, and discloses a wear-resistant high-toughness polypropylene material and a preparation method thereof.The polypropylene material is prepared by taking polypropylene as a base material and taking a compatibilizer, an ethylene-octylene block copolymer, a mullite functional agent and the like as auxiliary materials through mixing and melt extrusion processes. Wherein the mullite functional agent is prepared by modifying the surface of mullite with a branched macromolecular polymer connected by an ester bond, and the existence of the macromolecular polymer can improve the compatibility between the mullite and a polypropylene matrix, so that the mullite can efficiently exert the self-enhancement effect, the stress deformation resistance of the material is improved, and the mechanical property of the material is improved. And the material has high-strength and high-toughness effects. Besides, the macromolecular polymer can be cross-linked with a polypropylene molecular chain, so that the structural density of the material is improved, the material has higher hardness, the grinding crack width of the material on a membrane material surface is reduced, and the wear resistance of the material is improved.

The invention discloses a method for recycling rigid polyurethane foam by using an acidolysis method, which comprises the following steps: (1) adding polyol and a catalyst into a reaction container, carrying out nitrogen replacement, and heating to a temperature at which acid / anhydride reacts with carbamate bonds and urea bonds of polyurethane; (2) adding part of rigid polyurethane foam particles, uniformly mixing, adding acid / acid anhydride, and continuously adding the rigid polyurethane foam particles until the rigid polyurethane foam particles are completely added after the rigid polyurethane foam is reacted and dissolved; and (3) finally, cooling, and continuously and completely reacting to obtain the rigid polyurethane foam regenerated polyol. Wherein the catalyst is an acidic molecular sieve. According to the method, rigid polyurethane foam is recycled through an acidolysis method, due to the fact that acidolysis products do not contain toxic aromatic amine and molecular sieves are used as catalysts in the acidolysis method, foam decomposition can be accelerated, the viscosity of the products is reduced, follow-up utilization of the products is facilitated, and meanwhile the molecular sieves can be recycled after being filtered.

The present invention relates to a poly (arylpiperidinium) copolymer ionomer which does not have an aryl ester bond in a polymer backbone and has a branched piperidinium group introduced into a repeating unit, thereby having excellent chemical stability, excellent mechanical properties, and excellent mechanical properties. And meanwhile, the polymer has the advantages of high molecular weight, low swelling ratio, high dimensional stability, high ionic conductivity and limited phenyl adsorption effect. Furthermore, the anion exchange membrane prepared from the branched poly (arylpiperidinium) copolymer ionomer can be operated under low humidity conditions and is excellent in water management, and thus can be applied to membranes and binders for alkaline fuel cells, water electrolysis devices, carbon dioxide reduction, vanadium redox flow batteries, or metal-air batteries.

The invention discloses a waterproof wear-resistant label and a preparation process thereof, and belongs to the technical field of label paper.The waterproof wear-resistant label comprises surface paper, an adhesive, a film coating layer and release bottom paper, the adhesive comprises the following raw materials in parts by mass: 60-80 parts of an acrylic monomer, 3-5 parts of a polyfunctional group crosslinking monomer, 6-10 parts of a siloxane-acrylate copolymer, 1-2 parts of an initiator, 5-8 parts of nano silicon dioxide and 50-60 parts of a solvent. And a molecular chain of the siloxane-acrylate copolymer contains a boric acid ester bond. A siloxane long chain in the siloxane-acrylate copolymer has low surface energy, can help to form a waterproof barrier, and can effectively prevent water from permeating into an interface between the label and a product, so that the waterproofness of the label is greatly improved; and a dynamic cross-linked network can be formed by introducing boric acid ester bonds, so that the stability is improved, the label structure is reinforced, the wear resistance is improved, and the label can be tightly attached to a base material in a long-term humid environment.

The invention belongs to the technical field of adhesives, and particularly relates to a degradable mobile phone gum material and a preparation process thereof. The degradable mobile phone gum material is prepared from the following raw materials in parts by weight: 45 to 60 parts of bio-based methacrylate monomer, 5 to 10 parts of tackifying resin, 3 to 8 parts of vinyl ethoxyethyl acrylate, 3 to 8 parts of 4-hydroxybutyl acrylate, 2 to 5 parts of modified monomer A, 2 to 5 parts of modified monomer B, 0.1 to 2 parts of initiator and 60 to 80 parts of solvent, the modified monomer A contains a disulfide bond and a double bond; the modified monomer B contains a boric acid ester bond and a double bond. Dynamic disulfide bonds and boric acid ester bonds are introduced between polyacrylate molecular chains, the two dynamic bonds form a graded energy dissipation network, and the obtained degradable mobile phone back adhesive material is degradable and has an excellent creep recovery rate at the same time.

The invention discloses polymer graft modified graphene oxide as well as a preparation method and application thereof, and belongs to the field of building materials. The polymer grafted modified graphene oxide comprises graphene oxide and a polymer grafted on the surface of the graphene oxide through an ester bond, and the grafting mass ratio of the graphene oxide to the polymer is 1: (0.15-0.75). The preparation method of the polymer grafted modified graphene oxide comprises the following steps: firstly, carrying out esterification reaction on hydroxyl on the surface of graphene oxide and a reversible addition-fragmentation chain transfer polymerization (RAFT) chain transfer agent to generate GO of which the surface is grafted with the RAFT chain transfer agent; and adding a methacrylic acid monomer and an initiator, and carrying out RAFT polymerization on the surface of the GO to obtain a target product. The polymer grafting modified graphene oxide provided by the invention can achieve the effects of high polymer grafting ratio and capability of improving the fluidity of cement paste.