22 results about "Boroxine" patented technology

The invention provides a battery positive plate and a battery. The battery positive plate comprises a positive active material and a binder, and the binder is a product obtained by crosslinking a phenylboronic acid compound modified polyacrylic acid compound and a hydroxylated carbon nanotube. According to the battery positive plate, a three-dimensional conductive network binder based on crosslinking of a phenylboronic acid compound modified polyacrylic acid compound and a hydroxylated carbon nanotube is adopted, and the binder utilizes a multi-crosslinking mechanism between a phenylboronic acid group and the hydroxylated carbon nanotube (OHCNT) and between the phenylboronic acid group and positive active particles; a boroxane structure is formed through self-crosslinking of the boron oxide and the phenylboronic acid, and a special three-dimensional conductive network structure is formed, so that the mechanical strength and the conductivity of the binder and the cycle performance and the stability of the battery are improved; the discharge performance and the rapid charge-discharge capability of the battery can be improved, and the consumption of electrolyte can be reduced, so that the cycle life of the battery is prolonged.

The invention discloses an anti-ultraviolet spinning yarn and a preparation method thereof, and relates to the technical field of spinning yarns. When the anti-ultraviolet spinning yarn is prepared, 2, 4, 6-tri (4-hydroxyphenyl) boroxane and methylphenyl phosphonium chloride are subjected to a reaction, and a phosphorus-boron composite flame retardant is prepared; the preparation method comprises the following steps: polymerizing indole and 5-(aminomethyl) indole to coat the surface of nano titanium dioxide to prepare pre-modified nano titanium dioxide; the pre-modified nano titanium dioxide and (3-acryloyloxypropyl) tri (trimethylsiloxy) silane are subjected to a reaction, and modified nano titanium dioxide is prepared; mixing poly (pentamethylene diamine adipate), the modified nano titanium dioxide and the phosphorus-boron composite flame retardant, and performing melt spinning to obtain polyamide fibers; spinning polyamide fibers to obtain polyamide spun yarns; the polyamide spinning yarn is sequentially finished with the chloroacetic acid finishing liquid and the isoliquiritigenin finishing liquid, and the anti-ultraviolet spinning yarn is prepared. The anti-ultraviolet spinning yarn prepared by the invention has excellent anti-ultraviolet, flame-retardant and anti-static properties.

The invention relates to a preparation method of an epoxy coating, in particular to a preparation method of an epoxy coating with self-repairing performance, which is a self-repairing epoxy coating based on the synergistic effect of siloxane modified graphene oxide (GOS) and boron-oxygen-containing six-ring modified polydimethylsiloxane (BP-AMINE). The preparation method comprises the following steps: grafting (3-aminopropyl) triethoxysilane to graphene oxide through a chemical condensation method to prepare GOS, and preparing a BP-AMINE monomer through a chemical substitution method. The coating is endowed with quick self-repairing capability by utilizing reversibility of siloxane exchange reaction of GOS and boron oxygen hexacyclic ester exchange reaction of BP-AMINE. The coating can be repaired within 30 minutes at the temperature of 70 DEG C after being scratched, the repairing efficiency is larger than or equal to 98%, the repaired coating still keeps excellent corrosion resistance after being soaked in a 3.5 wt% NaCl solution for 60 days, and the coating is suitable for the fields of metal protection, aerospace and the like.

The application provides a battery positive plate and a battery, the battery positive plate comprising a positive active material and a binder, the binder being a product obtained by cross-linking a polyacrylic compound modified by a phenylboronic acid compound and a hydroxylated carbon nanotube.The battery positive plate of the application adopts a three-dimensional conductive network binder based on cross-linking of a polyacrylic compound modified by a phenylboronic acid compound and a hydroxylated carbon nanotube, the binder forming a special three-dimensional conductive network structure by a multiple cross-linking mechanism between the phenylboronic acid group, the hydroxylated carbon nanotube (OHCNT) and the positive active particles, and self-cross-linking between the phenylboronic acids to form a boroxin structure, improving the mechanical strength, the electrical conductivity of the binder, the cycle performance and the stability of the battery; the discharge performance and the ability of fast charging and discharging of the battery can be improved, and the consumption of electrolyte can be reduced, thereby prolonging the cycle life of the battery.

The invention discloses a preparation method and application of a high-strength, mildew-proof and low-cost cottonseed meal protein adhesive. The preparation method comprises the following steps: compounding L-lysine and 4-carboxyphenylboronic acid through a coupling reaction to prepare lysine borate, adding the prepared lysine borate into the cottonseed meal protein adhesive, adding a proper amount of transglutaminase, and uniformly stirring to obtain the novel high-strength, mildew-proof and low-cost cottonseed meal protein adhesive based on the skin bionic strategy. The innovation points of the invention are as follows: by simulating a peptide bond between protein and polysaccharide in skin and forming a compact cross-linked layer through dehydration condensation reaction, using transglutaminase to construct a grain-lysine isopeptide bond, and introducing boric acid to form a covalent boron-oxygen-six-ring structure, a dual cross-linked network is constructed. The cottonseed meal protein adhesive has the advantages that the bonding strength, mildew resistance and other properties of the cottonseed meal protein adhesive can be remarkably improved only by using trace transglutaminase and boron oxygen six-ring as cross-linking agents, and the preparation cost of the adhesive is reduced.

The application provides a fluorine-free ester-based electrolyte, a preparation method and a high-voltage lithium ion battery. The fluorine-free ester-based electrolyte comprises a lithium salt, a fluorine-free solvent and a fluorine-free additive; the fluorine-free solvent is a methylated linear carbonate and / or a methylated linear carboxylate, and the fluorine-free additive is a cyclic boroxine or a cyclic siloxane with 3-5 carbon-carbon double bonds; the methylated linear carbonate has a general structural formula as shown in formula (1); wherein R1 and R2 are independently alkyl groups with 1-4 carbon atoms, and the carbon atom number of at least one of R1 and R2 is greater than or equal to 3; the methylated linear carboxylate has a general structural formula as shown in formula (2); wherein R3 is a hydrogen atom or an alkyl group with 1-4 carbon atoms, R4 is an alkyl group with 2-4 carbon atoms, and the carbon atom number of at least one of R3 and R4 is greater than or equal to 3. The fluorine-free ester-based electrolyte can significantly prolong the cycle life of the lithium ion battery.

The application discloses an anti-erosion refractory material for a recycled aluminum smelting furnace and a preparation method thereof, and belongs to the technical field of green special refractory ceramics. The anti-erosion refractory material for the recycled aluminum smelting furnace comprises the following raw materials in parts by weight: refractory aggregate 65-70 parts, matrix fine powder 15-20 parts, binding agent 5-10 parts, and dispersing agent 0.5-1 part. The binding agent is generated by 2-formylphenylboronic acid dehydration condensation to form a boroxin compound, the boroxin compound is reacted with N-(2-aminoethyl)-3-aminopropyltrimethoxysilane to generate a Schiff base compound, the Schiff base compound is reacted with epichlorohydrin to generate a tertiary amine compound, and the tertiary amine compound is reacted with 4-aminobutylphosphoric acid to generate the binding agent. The anti-erosion refractory material for the recycled aluminum smelting furnace prepared by the application has excellent normal-temperature bending strength, thermal shock resistance and slag resistance.

The invention discloses a high-efficiency halogen-free plastic flame-retardant additive and a preparation method thereof, and relates to the technical field of plastic additives, the high-efficiency halogen-free plastic flame-retardant additive is prepared from the following raw materials by weight: 35-45 parts of a modified porous nanoscale flame-retardant oxide / expanded graphite compound, 8-10 parts of organic phosphinic acid metal salt, 10-12 parts of a phosphorus synergist, 10-12 parts of a nitrogen synergist, and 3-5 parts of a coupling agent; the modified porous nanoscale flame-retardant oxide / expanded graphite compound is a porous nanoscale flame-retardant oxide / expanded graphite compound co-modified by 3-[N, N-dimethyl-[2-(2-methylpropyl-2-enoyloxy) ethyl] ammonium] propane-1-sulfonic acid inner salt, 2, 4, 6-trivinyl boroxane and diphenyl (4-vinyl phenyl) phosphine oxide. The additive is good in environmental protection property, remarkable in flame retardant effect, small in addition amount, good in compatibility with a plastic matrix and small in negative influence on mechanical properties of plastics.

The invention provides a polyimide composite film with photo-thermal repair and photo-thermal response friction adjustment as well as a preparation method and application of the polyimide composite film, and belongs to the technical field of self-repair materials. According to the invention, reduced graphene oxide and boxane are introduced into polyimide, boxane is taken as a dynamic cross-linking point, after a polyimide composite film is damaged, under the stimulation of near-infrared light, reduced graphene oxide is taken as a photo-thermal conversion valve, dynamic recombination of boxane can be driven, and by controlling the position of a light source, the dynamic recombination of the boxane can be realized. Accurate and rapid repair of a damaged area can be achieved, and other areas are not affected. Due to the excellent photo-thermal conversion capacity of reduced graphene oxide, breakage and recombination of boron oxygen six rings are stimulated through near-infrared light, so that an energy dissipation channel is adjusted, real-time control over the friction coefficient is achieved, and the polyimide composite film has the characteristic of intelligent friction regulation and control and is suitable for more special complex working conditions.

The invention belongs to the technical field of supramolecular materials, and relates to a preparation method of a cyclosiloxane-boroxane copolymer. The method comprises the following steps: adding a cyclosiloxane compound and a boric acid compound containing an unsaturated bond into chloroform under the protection of inert gas, adding a Karst catalyst, and reacting to obtain a cyclosiloxane compound containing a boron-oxygen bond; the cyclosiloxane compound containing the boron-oxygen bond is stirred in a methanol and dichloromethane solvent at normal temperature, a boric acid group modified cyclosiloxane compound is prepared through proton exchange reaction deprotection, and the cyclosiloxane-boroxane copolymer is prepared through heating dehydration. The synthesis method is simple, the synthesis condition is mild, the prepared boron-oxygen-silicon microtube is simple in process, uniform in structure and stable in thermodynamic property, and a new thought is provided for research of the boron-oxygen-silicon microtube serving as a microreactor, an artificial capillary, a biomedical stent and other medical advanced devices.

The invention discloses polyurethane with efficient electromagnetic shielding and photo-thermal repairability and a preparation method, and belongs to the technical field of electromagnetic shielding materials.The method comprises the steps that amino-modified triphenyl boroxane is dissolved in an organic solvent, and an amino-modified triphenyl boroxane solution is obtained; mixing and stirring with an isocyanate-based polyurethane prepolymer, and carrying out chain extension reaction, so as to prepare a self-repairing polyurethane prepolymer; the preparation method comprises the following steps: adding a hydroxylated carbon nanotube suspension liquid and a nano-silver suspension liquid, stirring and reacting to obtain a cross-linked blended solution, and sequentially carrying out mold reversing and drying on the cross-linked blended solution to obtain the polyurethane with efficient electromagnetic shielding and photo-thermal repairability. The boron-oxygen bond enables the polyurethane film to realize self-repairing under the action of water molecules. The hydroxylated carbon nanotubes and the nano-silver endow the polyurethane film with good electromagnetic shielding performance, photo-thermal conversion performance and antibacterial property. The preparation route is simple, the service life of the electromagnetic shielding material is prolonged, and a thought is provided for design and manufacturing of a multifunctional flexible wearable material.

The invention belongs to the technical field of fiber preparation, and relates to a high-temperature-resistant silicon carbide ceramic fiber and a preparation method thereof. The silicon carbide ceramic fiber is prepared from a boron-containing compound modified organosilicon polymer as a precursor through the steps of spinning, electron beam irradiation non-melting, sintering and high-temperature sintering, the boron-containing compound modified organosilicon polymer is obtained by grafting a boron-containing compound onto an organosilicon polymer through electron beam irradiation; the boron-containing compound is a boroxane derivative. The preparation method of the silicon carbide fiber is simple and efficient, the non-melting efficiency is remarkably improved, and the prepared silicon carbide ceramic fiber has low oxygen content, good mechanical property and high temperature resistance.

The application belongs to the technical field of fiber preparation, and relates to a high-temperature-resistant silicon carbide ceramic fiber and a preparation method thereof. The silicon carbide ceramic fiber is prepared from a boron compound-containing modified organosilicon polymer precursor through steps including spinning, electron beam irradiation non-melting, sintering and high-temperature sintering; the boron compound-containing modified organosilicon polymer is obtained by grafting a boron compound onto an organosilicon polymer through electron beam irradiation; and the boron compound is a boroxin derivative. The preparation method of the silicon carbide fiber is simple and efficient, the non-melting efficiency is significantly improved, and the prepared silicon carbide ceramic fiber has low oxygen content, good mechanical properties and high-temperature resistance.

The present application belongs to the technical field of heat protection materials, and particularly relates to a fiber-reinforced silicon-boron modified phenolic aerogel multiphase composite material with ablation resistance and heat management functions and a preparation method thereof. The method comprises the following steps: (1) preparing a silicon modified phenolic resin; (2) synthesizing a silicon boroxine prepolymer modified phenolic resin solution; (3) preparing a reaction precursor solution; (4) vacuum impregnating a fiber preform; (5) sol-gel and phase separation; and (6) drying and filling a phase change material. The present application controls the reaction parameters in the modification process of the phenolic resin, forms a silicon boroxine oligomer under mild conditions, and inhibits the hydrolysis of silicon and boron components from the molecular level, so as to realize the stable introduction of high content silicon and boron components into the molecular chain of the phenolic resin. The filling of a high-enthalpy phase change material makes the heat transfer in the thickness direction of the material present a nonlinear delay, and can effectively inhibit the temperature rise rate on the back surface of the material within a given heating time.

The invention provides an electrolyte and a lithium ion battery, the electrolyte comprises a first additive and a second additive, the first additive contains boroxane and an unsaturated substituent group, the generation of a passivation film of lithium boride and inorganic / organic composite components is facilitated, and the internal resistance of the battery can be effectively reduced; the second additive comprises a sulfate group, and the sulfate group can preferentially decompose the solvent on the surface of the negative electrode to generate an inorganic salt containing sulfur (mainly low-valence sulfur) and an organic framework substance, so that the continuous decomposition of the electrolyte solvent on the surface of the negative electrode is effectively inhibited; besides, siloxane groups can react with water to inhibit acid rise of electrolyte, HF is prevented from attacking a positive electrode CEI film, and dissolution of transition metal is reduced, so that high-temperature-resistant cycle performance, gas production performance during high-temperature-resistant storage and capacity fading and impedance increase under high voltage are improved.

The application discloses a kind of flame-retardant water-resistant polyether type polyurethane elastomer and preparation method thereof, and relates to the technical field of polyurethane elastomer.The application first prepares boroxin intermediate BOX, then reacts with dimethyl methylphosphonate to obtain reactive phosphorus-containing boroxin flame retardant DMPB, which is introduced into polyurethane elastomer as halogen-free flame retardant.The obtained material has significantly improved limiting oxygen index, reaches UL-94 V-0 level, and has outstanding smoke suppression and toxicity reduction effect;continuous dense carbon layer is formed during combustion, and the mechanical and adhesive properties are excellent, halogen-free, environmentally friendly, water-resistant and stable, suitable for new energy vehicles and electronic components potting and other fields with high requirements for flame retardance and water resistance.

The present invention discloses a method for refining a solid electrolyte based on a hydrogen-bond self-assembled composite aprotic solvent and its application. The composite aprotic solvent system is composed of acetonitrile and tetramethylurea, and the solvent molecules are self-assembled into ordered aggregates driven by the C-H···O type weak hydrogen bond interaction between the nitrile group (C≡N) and the carbonyl group (C=O). To further enhance the hydrogen bond network and improve the electrolyte stability, (2,4,6-tris(3,4,5-trifluorophenyl)cyclotriboroxane) is introduced into the system. This additive forms a synergistic hydrogen bond with the solvent molecules through the electron-deficient property of the B-O bond to construct a three-dimensional supramolecular network, and at the same time inhibits particle aggregation through the dynamic template effect. Experiments show that adding cyclic boroxane to the composite aprotic solvent can reduce the D50 of sulfide powder to 500 nm and increase the ionic conductivity by more than 300%, providing an innovative solution for the development of high-performance solid-state batteries.

The present invention relates to the use of boroxines according to formula (I) to increase the storage stability of epoxy resin compositions, and to epoxy resin compositions comprising an epoxy resin, a hardener and a boroxine.

The invention discloses a kind of high-efficiency non-halogen plastic flame retardant additive and preparation method thereof, relate to the technical field of plastic additives, be made up of the following raw materials by weight: modified porous nano-scale flame retardant oxide / expanded graphite composite 35-45 parts, organic phosphinate metal salt 8-10 parts, phosphorus system synergist 10-12 parts, nitrogen system synergist 10-12 parts, coupling agent 3-5 parts;Described modified porous nano-scale flame retardant oxide / expanded graphite composite is 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, 2,4,6-trivinyl boroxine, diphenyl (4-vinylphenyl) phosphine oxide co-modified porous nano-scale flame retardant oxide / expanded graphite composite.This additive is environmentally friendly, has remarkable flame retardant effect, is added in small amount, has good compatibility with plastic matrix, and has little negative impact on plastic mechanical properties.

The invention discloses a UV-cured polyurethane pressure-sensitive adhesive and a preparation method thereof, and belongs to the technical field of pressure-sensitive adhesives, the pressure-sensitive adhesive comprises the following raw materials by weight: 100 parts of disulfide bond-carrying polyurethane acrylate, 1-3 parts of a photoinitiator, 14-16 parts of tackifying resin, 8-12 parts of an active diluent, and 0.5-2 parts of a cross-linking agent; according to the UV-cured polyurethane pressure-sensitive adhesive and the preparation method thereof, the UV-cured polyurethane pressure-sensitive adhesive is prepared by taking the polyurethane acrylate carrying the disulfide bond as a main raw material, and by utilizing reversible fracture and recombination of the disulfide bond under an external force, the UV-cured polyurethane pressure-sensitive adhesive can be prepared into the UV-cured polyurethane pressure-sensitive adhesive; and a dual dynamic covalent network is constructed by cooperating with a boroxane crosslinking agent with dynamic borate bonds and unsaturated double bonds, so that the initial adhesive force and cohesive strength of the pressure-sensitive adhesive are effectively balanced and improved.

The application discloses a kind of irradiation crosslinking cable insulating material and cable, belong to cable insulating material technical field.The cable insulating material includes the following mass fraction components: olefin block copolymer 40-60 parts, low-density polyethylene 20-30 parts, tripropargyl boroxin 2-4 parts, maleic anhydride grafted polyolefin 10-20 parts, amine group-containing polyphosphazene derivative 8-12 parts, antioxidant 0.6-1 part, lubricant 0.5-1.5 parts, toner 2-5 parts and auxiliary agent 0.1-0.3 parts.The cable insulating material occurs catalyst-free click chemistry reaction under electron beam irradiation through tripropargyl boroxin and amine group-containing polyphosphazene derivative, builds intrinsic network, combines OBC / LDPE blend matrix and maleic anhydride grafting, realizes antioxidant protection, efficient crosslinking and P-N-B synergistic flame retardation, process adaptability is strong, no small molecule is precipitated, and it is suitable for new energy charging pile cable.

The present application relates to the technical field of conjugated diene catalytic polymerization, and discloses a method for preparing polyconjugated diene, products and applications.The method comprises the following steps: in the presence of a ferrous cyclic boroxine catalytic system, a conjugated diene is subjected to a polymerization reaction to obtain polyconjugated diene; wherein the ferrous cyclic boroxine catalytic system comprises an N, N-bidentate carboxylic acid iron catalyst, an alkyl aluminum and a cyclic boroxine compound.In the present application, the inexpensive cyclic boroxine compound is applied to the polymerization of conjugated diene hydrocarbon, and the electron donor cyclic boroxine compound is used as the third component in the catalytic system, which can adjust the Lewis acidity of the metal center when coordinated with the metal, maintain the stability of the metal center, thereby realizing stable and efficient conjugated diene hydrocarbon polymerization, and reducing the cost of the catalytic system for conjugated diene catalytic polymerization.