2879 results about "Boronic acid" patented technology

The invention discloses a multistage crosslinking organic boron crosslinking agent capable of resisting high temperature of 180 DEG C and a preparation method of the multistage crosslinking organic boron crosslinking agent. The crosslinking agent comprises the following components in parts by weight: 3-4 parts of a boron-containing polymeric monomer, 10-12 parts of boric acid ester, 2-3 parts of a boron-containing compound, 15-18 parts of a solvent 1, 2-3 parts of a solvent 2, 0.5-1 part of a first ligand, 13-15 parts of a second ligand, 20-25 parts of a third ligand, 1-1.5 parts of alkenyl oxygen-containing silane and 2-3 parts of a strong hydrophilic monomer. The preparation method comprises the following steps: firstly, carrying out surface graft copolymerization on a boron-containing polymeric monomer to the surface of a nano material to prepare a boron-containing small-molecule polymer, and then chelating the boron-containing small-molecule polymer, boric acid ester, a boron-containing compound and the like step by step by using various chelating agents to obtain the organic boron cross-linking agent disclosed by the invention. After the cross-linking agent is compounded with a fracturing fluid, boron carriers with different release speeds are opened layer by layer, borate ions are released to be subjected to multi-stage cross-linking with the fracturing fluid, slow gelling is realized, a unique nano material is introduced to enhance the spatial structure and mechanical stability of gel, and the temperature resistance of the fracturing fluid is greatly improved.

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 porphyrin copper ion covalent organic framework material with excellent biocompatibility, and belongs to the technical field of biological medicines. The porphyrin copper ion covalent organic framework material is obtained by carrying out solvothermal reaction copolymerization on a porphyrin compound and a novel copper Schiff base boric acid complex in a protective atmosphere; the porphyrin compound is 5, 10, 15, 20-tetra (3, 4-dihydroxyphenyl) porphyrin, and the structural formula of the porphyrin compound is shown in the specification. The structural formula of the novel copper Schiff base boric acid complex is # imgabs0 #. According to the invention, a novel copper Schiff base complex and 5, 10, 15, 20-tetra (3, 4-dihydroxyphenyl) porphyrin are copolymerized to obtain Cu-COF with negligible biotoxicity, and the material realizes the synergistic effect of three antibacterial modes of PDT, PTT and hydroxyl free radicals. The prepared Cu-COF can also be slowly degraded in an acid environment, the infected microenvironment is improved in the degradation process, and the antibacterial effect is improved.

The invention discloses a waterproof anticorrosive coating and a preparation method and application thereof, and relates to the technical field of coatings, and the waterproof anticorrosive coating is prepared from the following raw materials in parts by weight: 30-40 parts of carboxyl-terminated hyperbranched polyester resin, 20-30 parts of carboxyl-terminated functional polyamide, 10-15 parts of hyperbranched polyurethane containing epoxy groups, 15-20 parts of filler, 1-3 parts of (3, 6-diamino acridine-9-yl) boric acid, 1-3 parts of 1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5- the component A is prepared from the following components in parts by weight: 3-5 parts of 2, 3, 5-triglycidyl-S-triazinetrione, 1-2 parts of a coupling agent, 0.8-1.2 parts of a flatting agent and 0.6-1.3 parts of a defoaming agent; the carboxyl-terminated functional polyamide comprises a structural unit introduced by the following monomers: N-(4H-1, 2, 4-triazole-4-yl) diphenylamine-4, 4 '-dicarboxylic acid, and 3, 3'-diamino-4, 4 '-difluorodiphenyl sulfone. The coating is good in waterproof and anti-corrosion performance, high in adhesive force with a base material, sufficient in solvent resistance and aging resistance and long in service life.

The invention discloses a preparation method of a high-activity hierarchical pore boric acid imprinted hydrogel microsphere adsorbent and application of the adsorbent to selective adsorption of a flavonoid compound naringin NRG. According to the invention, dopamine is used for modifying COFs so as to enhance surface functionalization of COFs; preparing a sulfydryl functionalized covalent organic framework microsphere; synthesizing sulfydryl microspheres by utilizing an emulsion interfacial polymerization method; preparing a COFs boron affinity imprinting microsphere adsorbent based on boron affinity interaction; the adsorbent is applied to selective adsorption of NRG in agricultural wastewater. The prepared adsorbent has a remarkable multilayer adsorption effect, and the adsorption capacity is remarkably improved through the boron affinity effect. The multi-stage pore structure of the COFs microspheres provides abundant sites for adsorption, and the mass transfer rate is remarkably improved. In addition, the prepared adsorbent shows remarkable specificity in the aspects of adsorption and separation of NRG, and a promising adsorption material is provided for industrial separation of NRG.

The invention discloses a polyvinyl alcohol composite film as well as a preparation method and application thereof in food coloring detection. The polyvinyl alcohol composite film is prepared from raw materials including phenylboronic acid modified carbon dots and polyvinyl alcohol through a thermocuring reaction, a phenylboronic acid group on the surface of the phenylboronic acid modified carbon dot and polyvinyl alcohol form a reversible covalent bond crosslinking point based on boric acid ester so as to form a dynamic three-dimensional network, and the structural formula of the phenylboronic acid modified carbon dot is # imgabs 1 #. The phenylboronic acid modified carbon dot is simple in process, easy to process and form and simple and convenient to use; compared with the prior art, the carbon dots modified by phenylboronic acid groups and the polyvinyl alcohol are added, the crosslinking effect between the carbon dots modified by the phenylboronic acid groups and the polyvinyl alcohol is remarkably enhanced, the mechanical strength and water resistance of the composite film are improved, the food coloring detection capacity of the composite film is improved, and in addition, the composite film further has the characteristic of being capable of being reprocessed, so that the composite film has wide application value.

The invention discloses a modified organic silicon resin, a high-temperature-resistant coating and a preparation method thereof, the modified organic silicon resin is prepared by hydrolyzing at least two different siloxane monomers and then carrying out condensation reaction on the hydrolyzed siloxane monomers and at least one boric acid monomer, and the main chain of the organic silicon resin is of a heteroatom doped structure formed by a Si-O bond, a B-O bond and a B-O-Si bond; at 200-250 DEG C, the modified organic-inorganic high-temperature-resistant composite material is subjected to a self-crosslinking reaction. The high-temperature-resistant coating overcomes the defect that the high-temperature-resistant coating in the prior art cannot meet the high-temperature test, and avoids the defects that organic and inorganic high-temperature-resistant coatings crack, the impact resistance and hardness are not matched, the water resistance is poor, and the wear resistance is poor.

The invention relates to a protein-based phenylboronic acid ester dynamic crosslinking hydrogel material as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving a component A, namely a phenylboronic acid modified protein polymer derivative, in a biocompatible medium to obtain a solution A; dissolving a component B, namely a macromolecular derivative containing a vicinal diol group, into a biocompatible medium to obtain a solution B; and mixing the solution A and the solution B with a certain concentration for a certain time to obtain the protein-based phenylboronic acid ester dynamic crosslinking hydrogel material. The boric acid ester dynamic cross-linking bond belongs to reversible chemical cross-linking reaction, and the prepared protein-based hydrogel material has enough mechanical strength and cheap operability. The protein-based hydrogel material disclosed by the invention can provide the effects of cell adhesion, proliferation and differentiation promotion, tissue regeneration and the like, can load and slowly release beneficial components for promoting tissue repair, is an ideal tissue engineering scaffold material, and can be applied to defect regeneration and repair of soft tissues, cartilages, bones and the like.

The invention discloses a boiler water energy-saving and emission-reducing agent, and relates to the technical field of boiler energy conservation, and the boiler water energy-saving and emission-reducing agent is prepared from the following components: 1, 3-bis ((trihydroxymethyl) methylamino) propane, sodium lignin sulfonate, caffeine, (3, 6-diamino-9-acridinyl) boric acid, a functional copolymer, sodium glycyrrhizinate, hydroxypropyl beta-cyclodextrin and deionized water. The functional copolymer comprises a structural unit introduced by the following monomers: N-acryloyl morpholine, 3-[N, N-dimethyl-[2-(2-methylpropyl-2-enoyloxy) ethyl] ammonium] propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, and 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl] ethyl 2-methacrylate. The agent has remarkable scale and corrosion inhibition effects, is safe and environment-friendly to use, and has good energy-saving and emission-reducing effects.

Disclosed herein are antimicrobial compounds, polymorphic forms, compositions, pharmaceutical compositions, the method of use and preparation thereof. Some embodiments relate to boronic acid derivatives and their use as therapeutic agents, for example, β-lactamase inhibitors (BLIs).

A compound or molecular complex. The compound or molecular complex comprises: a metal chelator configured for chelation with a radioactive isotope or a non-radioactive isotope; and a trifluoroborate (BF3)-containing moiety configured for 19F / 18F exchange or a precursor thereof; and optionally a cell-targeting domain.

The invention discloses a multi-metal borate nano-particle as well as a preparation method and application thereof. The preparation method comprises the following steps: in the presence of small molecules with alkyl chains, performing high-temperature thermal decomposition on an organic metal compound or a metal salt compound precursor and organic borate in a solvent, and then centrifuging, modifying, performing ultrafiltration, dialyzing and purifying to obtain the multi-metal borate nanoparticles. The preparation method disclosed by the invention has the characteristics of mildness, high efficiency and strong controllability. The multi-metal borate nanoparticles prepared by the preparation method disclosed by the invention have the advantages of monodisperse size, relatively high magnetic property and good biocompatibility. Therefore, the prepared multi-metal borate nanoparticles not only have multi-modal imaging functions such as magnetic resonance imaging, near-infrared two-region imaging, nuclear medicine imaging and magnetic particle imaging, but also can be used for various treatment means such as magnetocaloric therapy and boron neutron capture therapy; potential advantages are realized in biomedical applications such as magnetic targeting tumor treatment and imaging contrast agents, and high practical values are realized.

Disclosed herein are antimicrobial compounds compositions, pharmaceutical compositions, the method of use and preparation thereof. Some embodiments relate to boronic acid derivatives and their use as therapeutic agents, for example, β-lactamase inhibitors (BLIs).

To provide an electrolytic solution for an electrolytic capacitor that is capable of maintaining high performance over a long period of time even in severe environments, and an electrolytic capacitor using this electrolytic solution.SOLUTION: There is provided an electrolytic solution for an electrolytic capacitor, the electrolytic capacitor including: a capacitor element having an anode foil that has a dielectric oxide film layer on a surface thereof, a cathode foil, and a solid electrolyte layer; and an electrolytic solution impregnated into the capacitor element. The electrolytic solution comprises an organic solvent containing the following compound (a) and / or (b): (a) an aromatic carboxylic acid having a sulfo group and a hydroxy group, and a boron compound; and (b) a composite compound of an aromatic carboxylic acid having a sulfo group and a hydroxy group, and a boron compound.SELECTED DRAWING: None

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.

The invention relates to the technical field of compound fertilizers, and discloses a boron-zinc-molybdenum synergistic compound fertilizer, which is prepared from the following raw materials in parts by weight: calcium nitrate, ammonium polyphosphate, potassium sulfate, magnesium sulfate, disodium octoborate tetrahydrate, sugar alcohol chelated zinc, sodium molybdate and a synergistic auxiliary agent, the feed additive is prepared from a feed additive, an activator, 5-alginic acid oligosaccharide, aminolevulinic acid, sugar alcohol chelated magnesium, an antagonist, a stress-resistant enhancer and a coating material. According to the boron-zinc-molybdenum synergistic interaction compound fertilizer and the preparation process thereof, the disodium octoborate tetrahydrate, the sugar alcohol chelated zinc and the sodium molybdate are compounded according to a specific proportion, antagonism is avoided through proportion limitation, the synergistic effect of the three elements is remarkably enhanced, and the problem that a single element is insufficient or excessive is solved; chelated elements such as sugar alcohol chelated zinc and sugar alcohol chelated magnesium are combined with an activating agent (humic acid chelated calcium and silica sol) to form a gel-state chelate, so that the trace elements can be prevented from being fixed by soil, and the transfer efficiency of the trace elements in crops is improved.

The invention provides a preparation method and intermediates of alasset hydrochloride, which comprises the following steps: reacting an initial raw material as shown in a formula 1, which is protected by bare phenolic hydroxyl groups or different protecting groups, with bis (pinacolato) diboron to obtain an intermediate as shown in a formula 2, carrying out coupling reaction on the intermediate and a compound as shown in a formula 3 to obtain a corresponding hydroxyl-protected intermediate as shown in a formula 4, and separating and purifying the intermediate to obtain the alasset hydrochloride. The preparation method comprises the following steps: carrying out catalyst pressurized hydrogenation, carrying out asymmetric chiral hydrogenation to obtain an intermediate as shown in a formula 5, carrying out substitution or reductive amination to obtain an intermediate as shown in a formula 6, carrying out nucleophilic substitution on the intermediate as shown in a formula 7 to obtain an intermediate as shown in a formula 8, and carrying out deprotection to obtain a target product as shown in a formula I. According to the invention, a chiral resolution link in the existing preparation technology is avoided, and a chiral group is introduced through asymmetric hydrogenation, so that the yield is greatly improved, the production cost is greatly reduced, the tedious and tedious synthesis steps in the original process are shortened, and the post-treatment is simpler and more controllable.

The invention discloses a low-temperature zinc ion battery high-entropy eutectic electrolyte and a preparation method and application thereof, and relates to the field of batteries, the electrolyte comprises a hydrogen bond donor, a hydrogen bond acceptor and a solvent; the hydrogen bond donor is at least one of methyl sulfonamide, thioformamide, butyramide, asparagine, tert-butylamine, dimethyl propane diamine, oxalyl diamine, benzamide, sulfamide and ethyl sulfonamide; the hydrogen bond receptor is at least one of aspartic acid, glutamic acid, methionine, zinc chloride, zinc perchlorate, zinc fluoborate and zinc acetate; the preparation method comprises the following steps: mixing a hydrogen bond donor and a hydrogen bond acceptor, and heating to convert a solid into a liquid phase; and adding a solvent, and uniformly mixing to obtain the product. The invention also provides a zinc ion battery containing the electrolyte. The high-entropy eutectic electrolyte has the beneficial effects that-NH2 and halogen or carboxyl form hydrogen bonds to perform eutectic reaction, the freezing point of the eutectic solution is lower than that of a reactant, and the solvent is added to improve the confusion degree of the electrolyte, so that the high-entropy eutectic electrolyte is prepared.

The invention belongs to the technical field of luminescent polymers, and particularly relates to a long-afterglow polymer material as well as a preparation method and application thereof. The long-afterglow polymer material is successfully prepared by taking tris (4-boric acid frequency alcohol ester phenyl) amine as a luminescence center and an electron donor and aromatic polyester with strong electron accepting capability as a polymer matrix. Wherein the tri (4-boric acid frequency alcohol ester phenyl) amine rich in electrons interacts with the aromatic polyester with strong electron-withdrawing property, so that the non-radiative transition process of excitons is effectively slowed down, and further, the long afterglow effect which can reach 12 hours at most is realized. Particularly, when the long-afterglow polymer material is excited by sunlight, the afterglow intensity is remarkably improved, green afterglow can be maintained for 6 hours, and meanwhile, the material also shows excellent flexibility and transparency. In addition, the preparation process of the material is simple and convenient, and the material is expected to be applied to the fields of flexible display, anti-counterfeiting, information storage and wearable intelligent equipment.

The invention provides a preparation method of a recombinant collagen dressing, and belongs to the technical field of medical dressings. According to the technical scheme, stacked short sequences and continuous human collagen amino acid short sequences are repeatedly combined for multiple times to form recombinant collagen with specificity, and high similarity of the recombinant collagen with human collagen is ensured. On the basis, 4-FPBA is used as a cross-linking agent to respectively form a Schiff base bond responsive to pH and a boric acid ester bond responsive to glucose with CMCS and two kinds of HA with different molecular weights, and then the double-dynamic covalent cross-linked network adhesive hydrogel is synthesized. The triple-helix structure of the recombinant collagen is combined with a specific receptor on a cell membrane, and cell behaviors are regulated and controlled by inducing signal transduction through a cytoskeleton, so that skin microcirculation can be effectively improved, and a skin barrier can be repaired; the hydrogel dressing matrix has the effects of resisting inflammation, resisting oxidation, resisting bacteria, promoting healing and the like, the biological performance of the dressing is remarkably improved, and a better curative effect is achieved.

The invention relates to a hyaluronic acid-polyurethane composite material based on a double dynamic network and a preparation method and application thereof, and the preparation method comprises the following steps: carrying out hydrophobic modification reaction on hyaluronic acid and aminophenylboronic acid to obtain aminophenylboronic acid modified hyaluronic acid; the preparation method comprises the following steps: mixing polytetrahydrofuran ether glycol, polyethylene glycol and isophorone diisocyanate, carrying out a primary reaction, adding trimethylolpropane tri (3-mercaptopropionic acid) ester, carrying out a secondary reaction, adding tannic acid, and carrying out a third reaction to obtain tannic acid-terminated dynamic thionocarbamate polyurethane; and mixing the amino phenylboronic acid modified hyaluronic acid with the tannic acid terminated dynamic thionocarbamate polyurethane for reaction to obtain the hyaluronic acid-polyurethane composite material with the double dynamic networks. Compared with the prior art, by introducing a'thionocarbamate-borate 'double-dynamic network, high toughness, high strength, good self-repairability and repeatable processability in an extreme environment are realized, and the material is particularly suitable for manufacturing and repairing of key components in an LNG ship body and a heat insulation system thereof.

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 aggregation-induced emission material with high fluorescence quantum yield and large Stokes shift as well as a preparation method and application of the aggregation-induced emission material, and belongs to the technical field of preparation of aggregation-induced emission materials. Comprising the following steps: carrying out Suzuki-Miyaura coupling reaction on organic boric acid and bromosalicylaldehyde to obtain an intermediate; and adding the intermediate, sodium pyrosulfite and aminothiophenol into an organic solvent, and then carrying out high-temperature reaction to prepare the aggregation-induced emission material. The aggregation-induced emission material is synthesized by a two-step method, so that the aggregation-induced emission material can be rapidly synthesized on a large scale, and the prepared aggregation-induced emission material also has the advantages of high fluorescence efficiency, large Stokes shift, good stability and the like.

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 belongs to the technical field of court ground materials, and particularly relates to a ground material of a ground throw court and a preparation method thereof. The ground material of the ground throwing field comprises the anti-skid surface layer, the elastic buffer layer and the sound insulation layer from top to bottom, and has excellent sound insulation, impact resistance and wear resistance. The polyvinyl butyral bonded acrylic sound insulation felt and the jute fiber board are used as a sound insulation felt composite material to be laid on the surface of the base layer, so that the sound insulation effect of the ground of the ground throwing field is enhanced, boric acid and phenylboronic acid are compounded to react with siloxane, and reinforced gel prepared by adding a reinforcing material has excellent shear hardening and thermal stability, so that the sound insulation effect of the ground of the ground throwing field is improved. An elastic reinforcing material is prepared by compounding alkali-treated straw fibers and a reinforcing body prepared by compounding the alkali-treated straw fibers and a hydrophobically modified sponge framework, and has remarkable creep resistance and excellent impact hardenability, and the esterified straw fibers prepared by reacting the alkali-treated straw fibers with citric acid are used as a toughening agent to be added into wear-resistant elastic microspheres prepared by rubber, so that the wear-resistant performance of the wear-resistant elastic microspheres is greatly improved. The material has excellent wear resistance, light weight and aging resistance.

The invention discloses an antibacterial material rich in a bismuth metal organic framework and a preparation method thereof, the method comprises the following steps: adding an indole monomer and an alcohol monomer into a solvent, and then adding nitrosalicylaldehyde into the solvent to obtain a spiropyran compound; the preparation method comprises the following steps: adding humic acid into a binary solvent consisting of dioxane and butanol to obtain a mixed solution; the ratio of the mass of the humic acid to the volume of the binary solvent is (2-3): (20-40) g / ml; sequentially adding a bismuth source, 2-bromo-5-(trifluoromethyl) pyridine and 4-(trifluoromethyl) phenylboronic acid into the mixed solution to obtain a bismuth metal organic framework; and adding the spiropyran compound into the bismuth metal organic framework to obtain the antibacterial material rich in the bismuth metal organic framework. The antibacterial capability of the antibacterial material is improved.

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 photochromic compounds, and particularly discloses a photochromic diarylethene compound as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out coupling reaction on 2, 3-dibromo-1, 1-dimethyl-1H-indene and a borate compound to obtain a diarylethene compound; the boric acid ester compound comprises one or more of 2-methyl-5-phenyl-thiophene boric acid ester, 5-methyl-2-phenyl-thiazole boric acid ester and 2-methylnaphthalene boric acid ester. The present invention provides a diarylethene photochromic compound using indene as an alkene bridge, which can reversibly change between open-loop isomers and closed-loop isomers under the condition of illumination with a specific wavelength, and can reversibly change properties such as color and absorption spectrum of the compound. The invention further provides a preparation method of the compound. The preparation method has the advantages that the preparation method is simple, the product safety is high, the raw material cost is low, the product is easy to separate, and industrial synthesis is easy to realize.