1761 results about "Covalent bond" patented technology

The invention discloses reactive compatible ACR-PHA core-shell latex and application thereof, and belongs to the field of polymer chemistry and material science. The latex comprises composite particles with core-shell, gradient core-shell, raspberry-shaped or Janus heterostructure, interfaces of ACR phase and PHA phase of the latex are connected through covalent bonds, and the compatibility problem of physical blending is fundamentally solved. The latex particles have a Z-average particle size of 80-400 nm, a PDI of less than or equal to 0.30, and a minimum film formation temperature (MFFT) of-10 to 12 DEG C. The coating prepared by the invention has excellent high-humidity barrier stability (WVTR is less than or equal to 65g / m.d), low-temperature rapid heat sealability, water resistance, oil resistance and complete recoverability, does not contain PFAS, is an ideal alternative scheme of a traditional PE (Polyethylene) spraying film, and is suitable for the fields of food packaging paper, paper cups, bowls and the like.

The embodiment of the invention discloses an epoxy molding compound, an epoxy molding film and an electronic component, the epoxy molding compound comprises epoxy resin and a zeolite imidazole framework material, and the zeolite imidazole framework material comprises imidazole ligands and metal ions. The zeolite imidazole framework material is used as a curing agent and a nano reinforced phase, imidazole groups on the surface of the zeolite imidazole framework material can be subjected to a ring-opening reaction with epoxy resin to form covalent bonds, the zeolite imidazole framework material can induce the epoxy resin to generate a microcrack deflection mechanism, and the zeolite imidazole framework material can promote curing of the epoxy resin, so that the epoxy resin is cured, and the curing effect is improved. Therefore, the thermal expansion coefficient of the epoxy molding compound is reduced, the fracture toughness of the epoxy resin is improved, and the thermal stability of the epoxy molding compound is improved.

The invention discloses an interface covalently bonded core-shell structure boron nitride polypropylene composite dielectric material and a method. The interface covalently bonded core-shell structure boron nitride polypropylene composite dielectric material comprises a maleic anhydride grafted polypropylene matrix and a core-shell structure filler dispersed in the maleic anhydride grafted polypropylene matrix, the core-shell structure filler comprises hydroxylated boron nitride nanoparticles covalently grafted on a polymer shell layer on the surface of the core-shell structure filler; the polymer shell layer is polyglycidyl methacrylate; the epoxy group of the polymer shell layer reacts with the anhydride group of the maleic anhydride grafted polypropylene matrix to form a covalent bond. The invention has the characteristics of strong interface bonding force, uniform filler dispersion, and excellent comprehensive electrical properties and processability.

The invention provides a preparation method of a self-repairing resin-based composite material based on dynamic bonds. The self-repairing epoxy resin comprises one covalent dynamic bond of a Diels-Alder bond, a disulfide bond or a borate bond, and the preparation method of the self-repairing epoxy resin comprises the following steps: heating epoxy resin to a molten state, adding a curing agent component while stirring, and carrying out a prepolymerization reaction to obtain a prepolymer; the curing agent comprises a rigid diamine curing agent, a dynamic diamine monomer and a flexible chain segment regulator, and the dynamic diamine monomer contains a dynamic covalent bond; and carrying out curing molding on the prepolymer to obtain the self-repairing epoxy resin. And impregnating reinforced fibers or fabrics thereof with the prepared prepolymer, and heating and curing to obtain the self-repairing resin-based composite material. The invention provides a chemical molecule design, dynamic reversible chemical bonds are introduced into a resin matrix, and by constructing the dynamic bonds, the composite material has high performance of a traditional composite material and also has life-like self-healing ability.

The invention discloses a silicon negative electrode binder as well as a preparation method and application thereof. The silicon negative electrode binder is a graft copolymer with a comb-shaped structure; the grafted copolymer comprises a polyurethane chain segment forming a main chain of the comb-shaped structure, a polyacrylic acid chain segment serving as a branch chain and connected to the main chain through a covalent bond, and a fluorine-containing chain segment. According to the preparation method, a graft copolymerization method is adopted, the preparation method is carried out in a water-based system, the silicon negative electrode binder with hardness and softness is obtained, and the silicon negative electrode binder is applied to a lithium battery through the synergistic effect of mechanical property, interface stability and electrochemical performance. And a solution of a key material is provided for a high-capacity and long-cycle lithium battery which takes an active material with high silicon content as a negative electrode.

The invention relates to the field of high polymer materials, and discloses a high-wear-resistance elastomer sole material and a preparation method thereof.The material comprises an elastomer matrix and surface-modified boron nitride nanosheets; the elastomer matrix comprises a first dynamic network and a second dynamic network which are formed through crosslinking of dynamic covalent bonds, and the first dynamic network and the second dynamic network are based on different types of dynamic covalent bonds and have different dissociation activation energy barriers or external stimulus response conditions. The surface-modified boron nitride nanosheet and the second dynamic network form a selective interface enhancement effect; the preparation method comprises the steps of polymer functionalization, nanosheet surface modification, melt blending reaction net forming, forming and the like. The obtained elastomer sole material not only has excellent wear resistance and mechanical properties, but also can realize self-repair of graded response aiming at damages of different degrees, and the service life of the material is remarkably prolonged.

The invention belongs to the technical field of batteries, and particularly relates to a negative electrode material, a secondary battery and electric equipment. The second coating layer with the porous carbon material in the negative electrode material provides a sufficient buffer space for volume expansion of silicon, so that cracks and pulverization of the negative electrode material are effectively reduced, and the structural integrity of the negative electrode material is further ensured. And meanwhile, the solid electrolyte arranged in the second coating layer can maintain the smoothness of an ion transmission path in the silicon expansion process, so that the rate capability and the quick charge performance of the battery are ensured. Besides, a third coating layer (SEI film) formed by the ionic liquid has good ionic conductivity, and dynamic covalent bonds existing in some ionic liquids can be fractured and recombined under the action of external stress, so that a self-repairing function is realized. Therefore, when cracks are generated on the surface of the negative electrode material due to volume expansion, the third coating layer can quickly repair the cracks, prevent electrolyte permeation and lithium dendrite growth and inhibit side reactions.

The invention belongs to the technical field of adhesives, and particularly relates to a preparation method of a polysaccharide-based reversible bonding adhesive for constructing a dynamic covalent bond network. The preparation method comprises the following steps: by taking lipoic acid and sodium alginate as reactants and ferric chloride as a cross-linking agent, carrying out cross-linking reaction under a stirring condition to obtain a lipoic acid adhesive, namely the polysaccharide-based reversible bonding adhesive. According to the invention, renewable biomass resources such as sodium alginate, hyaluronic acid, chitosan and the like are used as main raw materials, so that the adhesive is expected to replace a traditional synthetic adhesive depending on a petroleum base, accords with a sustainable development strategy, contributes to reducing consumption of fossil resources, avoids release of toxic substances such as formaldehyde and the like in the synthesis and use processes, and has a good application prospect. And the method is more environment-friendly. The bio-based polysaccharide raw material has good biocompatibility and degradability, and an ideal base material is provided for developing a green and safe biomedical adhesive.

The invention discloses a 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 colored photovoltaic module which comprises a transparent colored glaze panel, a transparent bonding layer A, a battery layer, a bonding layer B and a back plate which are sequentially packaged in a stacked mode. The transparent colored glaze panel comprises a glass substrate, a transparent colored coating covering the outer side surface of the glass substrate, and a transparent glaze layer covering the outer side surface of the transparent colored coating; the transparent glaze layer is combined with the transparent colored coating through a covalent bond; the main component of the transparent glaze layer is silicon dioxide. The transparent colored coating of the colored photovoltaic module is positioned on the outer surface of the glass panel of the photovoltaic module, so that the defect of glass texture of a traditional photovoltaic module serving as a building material product is overcome; a transparent glaze layer with silicon dioxide as a main component is further arranged outside the transparent colored coating to serve as a protective layer, the adhesion fastness is high, the excellent performance of high hardness, high transparency, super weather resistance, acid and alkali resistance, scratch resistance and stain resistance is achieved, and the colored coating is effectively protected against color fading, falling off and external erosion such as acid rain, ultraviolet and sand wind.

The invention discloses an ultra-flexible stretchable dimming film and a preparation method thereof, and relates to the technical field of dimming films, and the ultra-flexible stretchable dimming film comprises an upper transparent electrode layer, a dimming function layer and a lower transparent electrode layer which are sequentially stacked from top to bottom; the preparation method comprises the following steps: 1) preparing a main matrix material / ultraviolet curing resin mixture; 2) assembling the dimming film; and 3) ultraviolet light curing. According to the invention, through surface phosphonic acid functionalization treatment, covalent bond anchoring of cerium oxide nanoparticles is realized on a thermoplastic polyurethane fiber network; by constructing a full-thermoplastic polyurethane material system, the breakthrough of interfacial compatibility between a fiber reinforced phase and a polymer matrix is realized, so that the film has high tensile strain capacity and excellent fatigue resistance on the premise of keeping high transparency.

The invention relates to the technical field of coatings, discloses a high-solid epoxy seal primer suitable for a wet base surface and a preparation method of the high-solid epoxy seal primer, and aims to overcome the defect of poor application performance of the wet base surface in the prior art. A water-responsive curing system, dynamic interface modification components and a synergistic mechanism of precise cross-linking regulation are constructed, a special curing agent with anti-protonation characteristics is adopted and matched with a modified molecular sieve to adsorb water on a basal plane so as to weaken water interference, interface bonding is enhanced through a coupling agent containing dynamic covalent bonds and a composite filler, and the water-based composite material is prepared. The rheology regulation and control auxiliary agent is supplemented to optimize the construction performance, the environment-friendly component is fused to give consideration to the characteristic of low volatility, efficient curing of a high-water-content base plane is achieved, the interface stability and long-acting protection capacity of a coating and a base material are improved, the coating is suitable for industrial large-scale production, and the coating requirement in a humid environment is met.

The invention relates to the technical field of electrode paste, in particular to electrode paste for a submerged arc furnace and a preparation method of the electrode paste. Comprising three-level grain size distribution anthracite aggregate which is electrically calcined at high temperature and modified by a KH-550 silane coupling agent, a modified silicon carbide whisker and boron-doped graphene-like carbon nitride composite filler, a maleic anhydride-mediated compatible medium-temperature pitch-polyborosiloxane binder and a graphite powder-borax functional additive. A step-by-step mixing and two-stage sintering process is adopted in the preparation process, a covalent bond interface bridging structure is constructed through the coupling agent, the composite dispersing agent regulates and controls the multi-dimensional network distribution of the filler, and the process synergistically improves the compactness and the interface bonding force of the green body. The electrode paste is firm in interface bonding, can form a ceramic protective phase at a high temperature, has excellent conductivity and mechanical strength, and prolongs the service life of the electrode paste for the submerged arc furnace.

The invention discloses a high-resilience eTPU foaming material and a preparation process thereof, and belongs to the technical field of foaming materials. The process comprises the steps of raw material premixing and TPU chain extension reaction, precursor system injection, in-situ phase change energy storage core-shell particle generation, supercritical two-fluid foaming and molding post-treatment. Wherein the SiO2-coated TiO2 core-shell particles are prepared by a non-hydrolytic sol-gel method, the porous SiO2 core adsorbs and fixes the micro-crosslinked polyurethane-based phase change material, the TiO2 shell provides sealing and supporting, the particles are combined with the TPU matrix through covalent bonds, and the micro-crosslinked polyurethane-based phase change material has a unique micro-crosslinked network structure, so that the thermal conductivity of the TPU matrix is improved, and the thermal conductivity of the TPU matrix is improved. The hidden danger of leakage of the phase change material in the using process can be effectively eliminated, and meanwhile the interface bonding effect between the inorganic particles and the TPU matrix is synchronously enhanced. The eTPU foaming material prepared by the invention has the characteristics of high resilience, strong interface bonding, excellent energy storage stability and low compression set, and is suitable for shoe materials, automotive interiors and other scenes.

The invention relates to the technical field of material surface engineering, and discloses a plastic surface treatment process to solve the problems that in the prior art, a plastic surface coating is poor in adhesive force and single in function, and a traditional treatment method is not environmentally friendly. The process sequentially comprises the following steps: pre-treating a base material, and obtaining a clean and stress-free base material through ultrasonic cleaning and thermodynamic stress elimination; performing low-temperature plasma surface activation, performing physical bombardment and chemical modification on the plastic surface by utilizing plasma of specific process gas in a vacuum environment, introducing a large number of active functional groups, and remarkably improving the surface energy; and preparing and applying the functional nano coating, namely forming firm covalent bonds by using the coupling agent in a coating solution containing functional nano particles and a coupling agent and the anchor points, so that the chemical coupling of the functional coating and the plastic substrate is realized.

The invention provides a preparation method of a shape-adaptive hydrogel material for tissue repair. The method comprises the following steps: S1, preparing HPC (Hydroxypropyl Chitosan); s2, preparation of phenylboronic acid functional chitosan PHPC (Polyhydroxyalkanoate); s3, preparing a PHPC solution; s4, preparing a polyvinyl alcohol (PVA) solution; and S5, preparing the dynamic covalent bond hydrogel. According to the invention, a dynamic covalent bond-boric acid ester bond with stimulation response capability is introduced on the basis of common dual-network CS-PVA hydrogel; on the premise of not changing the biocompatibility and biodegradability of the original dual-network hydrogel, the hydrogel is endowed with response capability under physical and chemical stimulation, and the diversity of application scenes is expanded; the dynamic mechanical behavior changes of the PCA hydrogel at four different strain rates of 0.05 mm / s, 0.5 mm / s, 5 mm / s and 50 mm / s are explored, and the passive shape adaptability of the PCA hydrogel along with tissue growth is studied; meanwhile, changes of hydrogel creep deformation and stress relaxation caused by addition of dynamic covalent bonds are researched.

The invention relates to a low-dielectric-loss high-thermal-conductivity epoxy resin composite material and a preparation method thereof, and the preparation method comprises the following steps: carrying out surface modification treatment on a thermal conductive filler: carrying out surface modification on the thermal conductive filler by adopting a chemical covalent bonding or physical adsorption mode, the heat-conducting filler is used for improving the compatibility of the filler and an epoxy resin matrix and reducing the interface thermal resistance, and comprises boron nitride with a two-dimensional sheet structure; epoxy resin, a curing agent and an optional modifier are evenly mixed, the epoxy resin is selected from epoxy resin with the low polarity characteristic, and the modifier comprises at least one of thermoplastic resin or elastomer. And the process is simple and controllable.

The invention relates to a cellulose-chitosan-based lithium ion battery diaphragm and a preparation method and application thereof.The preparation method of the diaphragm comprises the steps that gamma-polyglutamic acid and polyamide epichlorohydrin are adopted for modifying chitosan, the hydrophilicity and the liquid absorption capacity of the chitosan are improved, polyvinylpyrrolidone is adopted for coating the chitosan, and the hydrophilicity and the liquid absorption capacity of the chitosan are improved; pVP is replaced in ethanol soaking to form micropores, so that the porosity of the modified chitosan is improved. Amino groups and hydroxyl groups of the modified chitosan are combined with catechol of the polydopamine and hydroxyl groups of the hydroxy propyl cellulose through hydrogen bonds and covalent bonds to form a chitosan-cellulose-PDA interpenetrating network, and the diaphragm material suitable for the lithium ion battery is finally prepared by combining hot-pressing shaping. The preparation method has the advantages that the balance between the mechanical property and the ion conduction property of the diaphragm is realized through multi-component compounding by utilizing the biocompatibility and renewability of natural macromolecules (cellulose and chitosan).

The invention provides a lithium ion battery binder for inhibiting silicon expansion, a negative pole piece, a lithium ion battery and an electric device, and relates to the technical field of lithium ion batteries. The lithium ion battery binder capable of inhibiting silicon expansion comprises a first polymer and a second polymer, wherein the first polymer is a cross-linked polymer with dynamic reversible covalent bonds; wherein the dynamic reversible covalent bond comprises a disulfide bond or a borate bond; the binder network provided by the invention not only can effectively limit the excessive slippage of a polymer and provide higher mechanical strength, but also can generate reversible fracture and recombination at a stress concentration point in the charging and discharging process due to the dynamic reversibility of a disulfide bond or a borate bond, converts concentrated stress into fracture energy of a chemical bond and dissipates the fracture energy, so that the mechanical strength of the polymer is improved, and the service life of the polymer is prolonged. Therefore, permanent damage of the network is avoided, the pole piece structure is kept complete in long-term circulation, and stable electrochemical performance is achieved.

The invention provides a self-healing silicon-carbon composite negative electrode material and a preparation method and application thereof. The self-healing silicon-carbon composite negative electrode material comprises a core material formed by silicon-carbon composite particles and a shell layer formed by a self-healing solid electrolyte coating layer, the self-healing solid electrolyte coating layer is a polymer network containing dynamic covalent bonds, and lithium salt is doped in the polymer network. According to the invention, through reversible fracture and recombination of dynamic covalent bonds, microcracks generated by volume expansion of silicon are automatically repaired in situ.

The invention relates to the field of biomedicine, particularly provides a copper-based nano-enzyme as well as a preparation method and application thereof, and aims to solve the problems that in the prior art, clinical treatment on primary sclerosing cholangitis (PSC) is difficult in diagnosis and lacks of effective treatment drugs. The copper-based nano-enzyme comprises a nano-enzyme carrier and a copper-based nano-enzyme, wherein the nano-enzyme carrier is a two-dimensional nanosheet formed by copper ions, gallic acid and ursodesoxycholic acid through coordinate bonds; the probe molecule is a cyanine dye molecule connected to the surface of the nano-enzyme carrier through a covalent bond; wherein the fluorescence intensity of the copper-based nano enzyme is enhanced after the action of the alkaline phosphatase. The three functions of alkaline phosphatase responsive diagnosis, nano-enzyme catalytic treatment and ursodesoxycholic acid hepatic targeting are innovatively and synergistically integrated into one nano platform, the treatment function can be executed while specific imaging diagnosis is performed on diseases, and a new strategy is provided for diagnosis and treatment of diseases such as PSC.

The invention relates to the technical field of epoxy resin, in particular to self-repairing epoxy resin and a preparation method thereof. The self-repairing epoxy resin is prepared from the following raw materials in parts by mass: 80 to 120 parts of bisphenol A type epoxy resin, 20 to 40 parts of bisphenol F type epoxy resin, 5 to 15 parts of 1, 6-hexanediol diglycidyl ether, 1 to 3 parts of 3, 5-dimethylphenylboronic acid, 1 to 5 parts of furyl maleimide, 10 to 20 parts of dodecanedioic acid, 5 to 15 parts of butanetetracarboxylic acid, 1 to 3 parts of catalyst, 10 to 15 parts of nano silicon dioxide, 1 to 2 parts of boron nitride nanosheet and 1 to 2 parts of hyperbranched polyamidoamine. The curing agent is prepared from the following components in parts by weight: 20-30 parts of epoxy resin, 1-2 parts of sulfydryl-terminated polysiloxane, 20-30 parts of amine curing agent, 5-15 parts of reinforcing filler and 0.5 According to the invention, the balance among self-repairing capability, mechanical property and heat resistance is successfully realized; in the microcrack propagation process, fracture and recombination mechanisms of dynamic covalent bonds effectively prevent further propagation of cracks.

The invention relates to the technical field of preparation of high-moisture-absorption warm-keeping anti-wrinkle flexible cloth, in particular to high-moisture-absorption warm-keeping anti-wrinkle flexible cloth and a preparation process thereof.According to the designed moisture-absorption skin-friendly layer, alkali decrement treatment and silane coupling agent grafting treatment are combined, and the natural antibacterial property of coffee grounds is reserved; the shape memory polymer fibers of the anti-wrinkle layer deform when the temperature is larger than or equal to the glass transition temperature, the shape is fixed after cooling, a nanometer adhesive is melted in the hot pressing process to fill gaps of a framework, and the elastic recovery rate after repeated folding is far higher than 85%. The high porosity and low heat conductivity coefficient of aerogel fibers of the warm-keeping layer are combined with the heat storage and temperature regulation functions of phase change microcapsules, so that the air permeability of the warm-keeping layer is remarkably improved; all the layers are chemically bonded through plasmas to form covalent bond combination, so that the phenomenon of layering after multiple times of water washing or bending is effectively avoided.

The present invention relates to antibody-cytokine conjugates, wherein the cytokine is conjugated to the antibody via a cleavable linker. Conjugates according to the invention can be prepared by coupling a functionalized antibody Ab (F) x comprising x reactive moieties F, where x is an integer in the range of 1-10, with an immune cell-binding polypeptide comprising one or two reactive moieties Q, where the antibody is specific for tumor cells, and the immune cell-binding polypeptide is specific for immune cells, wherein the reaction forms a covalent bond between the functionalized antibody and the immune cell-binding polypeptide by reaction of Q with F. The invention further relates to antibody-cytokine conjugates obtainable by the method according to the invention and to medical uses thereof.

The invention discloses a sodium ion sulfide solid electrolyte with enhanced stability, the chemical composition formula of the solid electrolyte is Na3Sb1-xAsxS4-ySey, x and y are respectively molar ratios of As and Se, x is more than or equal to 0.1 and less than or equal to 0.5, y is more than or equal to 0.1 and less than or equal to 0.4, the solid electrolyte has a cubic phase crystal structure similar to Na3SbS4 and belongs to a space group, the side length of a cell is a = b = c = 7.19309, and the volume of the cell is V = 374.9457336; in the crystal structure, Sb and As are mixed to occupy the peak and center equivalent position 2a of a cubic unit cell; s and Se are mixed to occupy a 24g position, Na ions are filled in gaps of unit cells, Na1 occupies a 6b position, Na2 occupies a 2b position, and a covalent bond network is formed by the position occupied by the mixture of S and Se and the position occupied by the mixture of Sb and As. The solid electrolyte is low in cost, the ionic conductivity of the solid electrolyte is 10 <-3 > S / cm magnitude, and the solid electrolyte has excellent cycle performance and air stability.

The invention belongs to the technical field of photovoltaic solar materials, and discloses a method for modifying a calcium iron ore solar cell by a small molecule buried interface, which is used for solving the problems of low photoelectric conversion efficiency and poor stability of a perovskite solar cell. Halogenated monothiadiazole or halogenated polythiadiazole molecules are used as a buried interface layer and are led between the hole transport layer and the perovskite layer. The interface layer generates uniform film covering on the hole transport layer, so that non-covalent bond interaction is formed, and spreading and expansion of a perovskite precursor solution are facilitated. N atoms in the BSC and the BFS are combined with Pb < 2 + > to passivate the bottom surface defect of the perovskite, and F atoms in the BFS can form hydrogen bonds with FAI, so that the electronic performance of the perovskite thin film is influenced. Due to good film quality and interface contact, non-radiative recombination between interfaces is effectively inhibited, carrier transport of the device is improved, and therefore the efficiency and stability of the perovskite solar cell device are enhanced.

The invention discloses a high-performance polypropylene material and a preparation method thereof, and belongs to the technical field of high-performance polypropylene, the high-performance polypropylene material is characterized by being prepared from the following components by weight: 50-80 parts of polypropylene, 10-30 parts of inorganic ultrafine particle coated talcum powder, 5-20 parts of a flexibilizer, 2-5 parts of a dispersant, 0.2-0.5 part of an antioxidant, and 0.5-3 parts of a nucleating agent. The invention has the following beneficial effects: the material with excellent comprehensive mechanical properties such as notch impact strength, tensile strength and bending strength is obtained; the inorganic ultrafine particle coated talcum powder has excellent dispersity to form an effective'coating 'or'filling' structure, and also has firm Si-O-Si covalent bonds formed with hydroxyl groups on the surface of the filler, so that the comprehensive performance of the material is improved.

The invention discloses an anti-oxidation and anti-scouring heat prevention and insulation composite material, a preparation method and application, and belongs to the technical field of high-temperature thermal protection materials. According to the method, a two-step in-situ modification method is adopted, hydrolyzed organosilane reacts with phenolic resin to prepare silicon modified phenolic resin, then the silicon modified phenolic resin is bonded with an organoboron compound to obtain boron-silicon co-modified phenolic resin, a curing agent is added, then the boron-silicon co-modified phenolic resin is injected into a fiber reinforcement mold, and a finished product is obtained through a sol-gel reaction and normal-pressure drying. According to the invention, boron and silicon elements are embedded into phenolic aldehyde molecular chains through covalent bonds to form a boron-silicon-carbon hybrid network, a nano ceramic phase and a compact glassy protective layer are generated at high temperature, and the coating has excellent anti-scouring property, thermal stability and heat insulation property. The preparation process is simple and controllable, is suitable for large-scale production, can accurately regulate and control the performance, and is suitable for thermal protection parts of supersonic aircrafts.

The invention discloses a compression-resistant high-strength composite PP material and a preparation method thereof. Wherein the composite PP material is prepared from the following components in parts by weight: 60 to 80 parts of polypropylene, 5 to 8 parts of aminated polypropylene, 20 to 25 parts of modified glass fiber, 0.2 to 0.8 part of an antioxidant and 0.2 to 1 part of a lubricating agent. Through unique interface design, a stable chemical bridging interface is constructed between the glass fiber and a polypropylene matrix, and the tensile strength of the material is remarkably improved; meanwhile, the DOPO-based flame retardant is immobilized on the surface of the fiber in a covalent bond mode, so that the material is endowed with excellent and lasting flame retardance, and the problem that the mechanical property and flame retardance of a traditional material are difficult to synergistically improve is effectively solved.

The invention relates to a preparation, regulation and control method of a thermoplastic elastomer encapsulating material in the technical field of new materials, which comprises the following steps: realizing an in-situ reaction process by controlling the concentration and reaction temperature of reactive functional groups in the encapsulating material according to an interface reaction rate constant and active group distribution density; if the reaction conversion rate reaches a preset value, a chemically bonded interface bonding layer is formed; monitoring the stress distribution state in the rubber coating layer by adopting a stress analysis algorithm, and when detecting that local stress concentration exceeds the yield strength of the material, dispersing a stress concentration area by adjusting the length of a flexible chain segment and the density of a rigid cross-linking point in a cross-linking network; and deformation data and a bonding strength change trend of the interface bonding layer in the temperature cycling process are obtained, if the bonding strength attenuation rate exceeds a preset threshold value, a dynamic cross-linking mechanism is activated, and the dynamic equilibrium state of interface bonding is maintained through fracture and recombination of a reversible covalent bond.