957 results about "Catechol" patented technology

The invention discloses a high-viscosity activated rubber powder grafted functionalized block copolymer composite modifier and preparation thereof, composite modified asphalt and preparation and application thereof, and belongs to the technical field of modified asphalt. The composite modifier disclosed by the invention is formed by grafting catechol / polyamine modified aminated rubber powder and an epoxidized block copolymer. A catechol / polyamine group and an amino group are subjected to a condensation reaction to jointly modify the surface of the rubber powder, so that the surface of the rubber powder has rich functional groups and active sites, the rubber powder and an epoxidized block copolymer are subjected to a chemical crosslinking reaction in the later period, and the effect of enhancing the full performance of asphalt by the composite modifier is achieved; the problems that the composite modifier and the modified asphalt are prone to agglomeration, poor in compatibility and the like are solved. A self-healing mixture prepared from the composite modified asphalt and a self-healing material together has synergistic effects of the composite modified asphalt and the self-healing material, so that the pavement performance and the use quality are effectively improved, the service life of a road is prolonged, the energy loss is reduced, and the composite modified asphalt has application value in the field of roads.

The invention belongs to the technical field of biomedical materials, and particularly relates to adipose-derived mesenchymal stem cell loaded conductive hydrogel and a preparation method and application thereof, the preparation method comprises the following steps: step S1, after hyaluronic acid is subjected to oxidation treatment, dopamine is grafted to oxidized hyaluronic acid, and oxidized hyaluronic acid-dopamine is obtained; step S2, carrying out amination treatment on gelatin to obtain aminated gelatin; s3, mixing the oxidized hyaluronic acid-dopamine with the aminated gelatin, and carrying out Schiff base crosslinking, so as to obtain hydrogel; and step S4, loading the adipose tissue-derived stromal cells by using the hydrogel. Dopamine is grafted on an oxidized hyaluronic acid macromolecular chain through amidation reaction, the hydrophilicity and the electrical property of the macromolecular chain are improved, a catechol structure is provided to provide possibility for iron ion coordination, the tissue adhesion, the injectability, the mechanical property and the electrical conductivity of the hydrogel are improved, and the hydrogel can be applied to the field of biomedical materials. After being applied to a spinal cord injury rat model, the functional recovery can be promoted.

The invention discloses injectable hydrogel capable of rapidly stopping bleeding and a preparation method thereof. The injectable hydrogel is prepared from a natural high-molecular compound, a natural high-molecular polymer, an organic high-molecular polymer, a catechol-like organic compound, a cross-linking agent and ultrapure water. A natural high-molecular linear polymer is combined with an organic high-molecular polymer in a non-covalent bond manner to form a macromolecular polymer, and the macromolecular polymer is used as a main network skeleton of the hydrogel to provide strength support; the catechol-like organic compound and the natural high-molecular compound form a strong non-covalent effect in a polymer chain to enhance the strength, the hemostatic property, the antibacterial property, the adhesion and the self-healing property of the organogel; besides, under the action of the cross-linking agent, the catechol-like organic compound forms a free radical group to be subjected to free radical coupling with the macromolecular polymer, so that the effect of enhancing a hydrogel network is achieved, and meanwhile, hydrogen bonds, dipole-dipole interaction, static interaction and the like can be formed with polar functional groups on the surface. The hemostatic gel is rapid in hemostasis, simple to prepare, good in biocompatibility, good in antibacterial property, injectable and degradable.

The invention discloses a zinc negative electrode and a preparation method and application thereof. The zinc negative electrode comprises a polycatechol coating; and the thickness is 10 nm to 1 [mu] m. The method has the advantages of being green, environmentally friendly and low in cost. Catechol has zinc affinity and can be stably combined with zinc metal to form an ultrathin protection layer, compared with other organic matter coating methods (the process is complex and raw materials are expensive), the method is simpler and rapider, no binder or expensive medicine is needed, the zinc foil only needs to make contact with a modified solution for a certain time, practicability is high, and the method is suitable for large-scale production. The application prospect of large-scale continuous preparation is realized. The added oxidizing agent has the function of accelerating reaction, other metal ions can be introduced to be chelated with catechol, the deposition behavior of zinc ions is further optimized and regulated, and the battery performance is improved. The cycle life of the modified zinc negative electrode battery can reach more than 500h.

A flame-retardant laminated solid wood composite floor and a manufacturing method therefor. The manufacturing method comprising: first reacting dopamine hydrochloride with acryloyl chloride to generate a dopamine acrylamide monomer; by means of a double bond in the dopamine acrylamide monomer, carrying out a click reaction with a phosphate monomer containing a sulfydryl group, so as to introduce a catechol group into a side chain of the phosphate monomer and obtain a flame-retardant monomer containing the double bond; and then mixing pentaerythritol tetra(3-mercaptopropionate), pentaerythritol triacrylate, perfluorodecanethiol and the flame-retardant monomer containing the double bond to obtain a photocurable coating material. The coating material is photocured after being coated on the surface of a wood veneer, thus effectively improving the flame-retardant performance of the wood veneer; moreover, the adhesion between the coating layer and the wood veneer is excellent. The wood veneers are laminated in multiple layers, are glued and assembled into a layered structure, and then hot-pressed to form the solid wood composite floor, thus improving the comprehensive performance.

The invention relates to the technical field of fibers, and discloses a preparation method of antibacterial modified fibers for textile fabrics, nylon 6 and copper-tea polyphenol-based hyperbranched polyamide are added into formic acid, the mixture is stirred and then spun by an electrostatic spinning machine, and the antibacterial modified fibers for the textile fabrics are obtained. The hyperbranched polyamide has good compatibility with nylon 6, contains a three-dimensional dendritic hyperbranched molecular chain, has a good toughening effect on nylon 6 fibers, and enables the fibers to maintain good breaking strength while improving the elongation at break of the fibers. The copper-tea polyphenol-based hyperbranched polyamide contains tea polyphenol active antibacterial substances and antibacterial copper ions, so that the antibacterial performance of the fiber is remarkably improved. Meanwhile, the copper ions, the tea polyphenol and the catechol-based hyperbranched polyamide form a tight and firm coordination effect, and the copper ions and the tea polyphenol are also difficult to elute from a fiber matrix, so that the fiber still keeps excellent antibacterial performance.

The invention relates to multi-dynamic-bond synergistic self-repairing polyurethane and a preparation method thereof, and belongs to the technical field of polyurethane. The polyurethane is prepared from the following raw materials: poly (dihydric alcohol), diisocyanate, a pyridine chain extender, catechol and ferric ion salt. A main chain of polyurethane is formed by chain extension of polydihydric alcohol and diisocyanate through a pyridine chain extender, an end group is a catechol group exposed after end sealing of a catechol substance, on one hand, ferric ions and the catechol group form a metal coordination bond, and on the other hand, ferric ions and nitrogen atoms on pyridine form a coordination bond; the polyurethane contains multiple dynamic bonds, including coordination bonds of pyridine and iron ions, coordination bonds of catechol and iron ions, and hydrogen bonds between macromolecular chains. When the material is subjected to external pressure, the material has relatively good damping capacity due to internal friction force in a molecular chain; meanwhile, the polyurethane has good self-repairing capability at room temperature.

The invention relates to a double-layer dressing for promoting wound healing and inhibiting scars and a preparation method and application thereof.The double-layer dressing comprises a hydrogel layer and a piezoelectric film layer compounded on the hydrogel layer, and the piezoelectric film layer is prepared by mixing an organic piezoelectric material, a ferroelectric material and an organic solvent and then conducting an electrostatic spinning technology; the hydrogel layer is formed by curing a methacrylic anhydride acellular extracellular matrix, methacrylic anhydride catechol chitosan and conductive nanoparticles under the action of a curing agent. The lower skin contact layer of the double-layer dressing is the hydrogel layer, so that the directional growth of fibroblasts is favorably induced; the upper dressing is a piezoelectric material composite ferroelectric material, is beneficial to piezoelectric stimulation re-induction function recovery after final skin repair and guidance of directional growth of wound cells, and has good skin wound induction repair and scar inhibition effects.

The invention discloses a method for detecting antioxidants and polyphenols in food by constructing a colorimetric sensing array based on monatomic iron nano-enzyme, and belongs to the field of nanotechnology and colorimetric sensing. The traditional monatomic nano enzyme shows limited enzyme-like activity and substrate specificity, and is difficult to meet the comprehensive requirements of detecting various antioxidants and polyphenols in food. In the research, a novel nano-enzyme system (sdsFeN (at) G) of monatomic iron nano-enzyme is developed. The SdsFeN (at) G shows excellent enzymatic activity, and a three-channel colorimetric sensing array is constructed by utilizing inhibition of different antioxidants and polyphenols on oxidation of three chromogenic substrates, so that simple, convenient and reliable identification and detection of five substances (tert-butylhydroquinone, butylated hydroxyanisole, propyl gallate, catechol and hydroquinone) in food are realized.

The invention belongs to the technical field of micro-nano, and particularly relates to a drug-loaded microalgae motor and a preparation method and application thereof, and the drug-loaded microalgae motor comprises a polydopamine / ferroferric oxide / chlamydomonas reinhardtii micromotor and a drug loaded on the polydopamine / ferroferric oxide / chlamydomonas reinhardtii micromotor, the drug is combined with catechol groups on the surface of polydopamine in the polydopamine / ferroferric oxide / chlamydomonas reinhardtii micromotor through covalent bonds; the medicine is an anti-cancer medicine or an anti-inflammatory medicine. The microalgae motor has the characteristics of simple preparation method, good material biocompatibility, high biodegradability and the like. The polydopamine / ferroferric oxide / chlamydomonas reinhardtii drug-loaded micromotor prepared by the invention has the characteristic of self-driving in intestinal juice, so that the polydopamine / ferroferric oxide / chlamydomonas reinhardtii drug-loaded micromotor can target an intestinal disease part under the guidance of an external magnetic field to improve the treatment effect and reduce the side effect of a drug, thereby expanding the application space of a micro-nano motor in the field of biomedicine.

The invention relates to the technical field of civil engineering preparation, and particularly discloses microorganism synergistic fiber solidified soil and a preparation method thereof. The microorganism synergistic fiber solidified soil is prepared from the following components: sandy soil, modified PE fibers, magnesium oxide, urease bacterium liquid and cementing liquid, the preparation method of the modified PE fiber comprises the following steps: soaking the PE fiber in a solution A; taking out the PE fiber, soaking in the solution B, and drying to obtain the PE fiber. The solution A is composed of 12-18 mmol / L of catechol and 4-6 mmol / L of tetraethylenepentamine, and a solvent is a hydroxymethyl aminomethane aqueous solution; the solution B is prepared from 8 to 12 mmol / L of KH-550 silane coupling agent and 16 to 24 mmol / L of EOS tetraethyl silicate, and the solvent is ethanol. According to the microorganism synergistic fiber solidified soil provided by the invention, an MICP-based soil body solidification effect enhancing technology is perfected, so that the mechanical property and the anti-permeability performance of the solidified soil are improved.

The invention provides a low-temperature-impact-resistant food packaging material and a preparation method and application thereof.The low-temperature-impact-resistant food packaging material is prepared from, by mass, 100 parts of polylactic acid, 1-10 parts of modified layered double hydroxide and 5-40 parts of hyperbranched polyester; wherein the modified layered double hydroxide is obtained by treating layered double hydroxide with a composite anionic surfactant and then treating the treated layered double hydroxide with an organic cationic compound with a long alkyl chain; the composite anionic surfactant comprises a first anionic surfactant and a second anionic surfactant; wherein the first anionic surfactant comprises sodium dodecyl sulfate; the second anionic surfactant comprises a sulfonate anionic surfactant containing an amido bond and a catechol structure. Through the formula design, the impact toughness of the material at low temperature can be improved while the mechanical property of polylactic acid is maintained, and the material can be suitable for the field of food packaging.

The invention relates to a pH-responsive aromatic nanocapsule as well as a preparation method and application thereof, and the pH-responsive aromatic nanocapsule comprises the following components in percentage by mass: 0.4-10% of modified SiO2, 0.2-30% of a core material, 10.2-16% of a quaternized chitosan / polydopamine wall material and the balance of water. The preparation method comprises the following specific preparation steps: preparing a modified SiO2 suspension, adding a core material, and carrying out homogeneous emulsification under a high-speed shearing machine to prepare a Pickering emulsion; preparing a quaternized chitosan / polydopamine wall material solution; and finally, carrying out isovolumetric blending on the Pickering emulsion and the quaternized chitosan / polydopamine wall material solution (grafting the quaternized chitosan / polydopamine wall material through the modified SiO2), and stirring to obtain the aromatic nanocapsule. Compared with the prior art, the preparation method has the advantages that the lavender essential oil is taken as a core material, the quaternized chitosan / polydopamine is taken as a wall material, and the modified SiO2 stable Pickering emulsion is taken as a template, so that the catechol-based self-adhesive nanocapsule with pH responsiveness is prepared. The nanocapsule is prepared by an emulsion template method, the preparation method is mild in condition, and the prepared nanocapsule is green and safe and has excellent adhesion and antibacterial properties.

The invention discloses application of conductive hydrogel combined with electrical stimulation in treatment of diabetic foot ulcer caused by neuropathy, and belongs to the field of biological medicine. The conductive hydrogel is obtained by mixing chitosan, polyvinyl alcohol, MXene and gelatin; the chitosan is catechol group modified chitosan, the MXene is polyphenol and Mg ion modified MXene, the gelatin is phenylboronic acid modified gelatin, the electrical stimulation condition is 100 mV cm <-1 >, and the diabetic foot ulcer comprises diabetic foot ulcer caused by neuropathy. Experiments prove that the prepared conductive hydrogel can promote cell migration in combination with electrical stimulation, wound healing of the diabetic foot ulcer can be accelerated, functional repair can be achieved, and a new thought is provided for clinical treatment of the diabetic foot ulcer caused by neuropathy.

The invention belongs to the field of compositions of biomedical materials and high-molecular compounds, and provides hydrogel capable of regulating and controlling the redox steady state of a microenvironment as well as a preparation method and application of the hydrogel. A macromolecular network of the hydrogel capable of regulating and controlling the redox steady state of the microenvironment is formed by catechol modified hyaluronic acid, carboxylated chitosan, oxidized dextran and iron ions through a hybridization cross-linking reaction; under physiological conditions, catechol groups in the hydrogel can be subjected to an autoxidation reaction to generate H2O2, and meanwhile, iron ions coordinated on the catechol groups in the hydrogel can catalytically decompose H2O2 into water and oxygen, so that the level of active oxygen in a microenvironment is adjusted. The hydrogel disclosed by the invention can realize bidirectional regulation and control on active oxygen in a pathological microenvironment after myocardial infarction, so that the redox steady state of the pathological microenvironment after myocardial infarction is maintained, and the regeneration and repair capacity of an existing hydrogel material with antioxidant capacity on myocardial tissues after myocardial infarction is improved.

The invention discloses an alkali-free accelerator and a preparation method and application thereof in the technical field of concrete additives, and the alkali-free accelerator provided by the invention comprises the following components in percentage by mass: 40%-50% of aluminum sulfate, 10%-15% of magnesium sulfate, 0.2%-0.6% of diethanol amine, 0.5%-1% of catechol-4-ammonium sulfonate, 5%-10% of a stabilizer and the balance of water. The stabilizer comprises silicate dispersion liquid and silica sol. The alkali-free accelerator provided by the invention can be used for spraying concrete, the mixing amount of the alkali-free accelerator is generally 4-6% of the mass of cement, the alkali-free accelerator is good in rapid setting effect and has excellent early and later compressive strength, and meanwhile, the alkali-free accelerator has relatively excellent stability.

The invention provides an interface-enhanced regenerated bone scaffold for sustained-release medicines as well as a preparation method and application of the interface-enhanced regenerated bone scaffold, and belongs to the technical field of bone tissue engineering. According to the invention, polycaprolactone and hydroxyapatite are taken as matrix components of the regenerated bone scaffold, so that the regenerated bone scaffold has mechanical strength matched with a host bone and good biocompatibility; the polydopamine coating is loaded on the surface and internal pores of the regenerated bone scaffold matrix, surface functional modification is easy to perform, and a catechol structure in the polydopamine coating can perform coordination binding with metal ions in MOFs, so that the falling rate of MOFs particles is reduced, and the MOFs particles are uniformly and stably distributed; the MOFs particles are used for loading the eucommia ulmoides extract, safety and non-toxicity are achieved, the eucommia ulmoides extract is encapsulated in the MOFs particles, the stability of the eucommia ulmoides extract can be improved, and a better drug release effect and a better bone regeneration promoting effect are achieved.

The invention relates to the technical field of electrochromic devices, in particular to an interface-enhanced gel-based electrochromic device and a preparation method thereof. The interface enhanced gel-based electrochromic device comprises a bottom electrode layer, a first modification layer, a gel electrolyte layer, a second modification layer, an electrochromic layer and a top electrode layer which are arranged in sequence, wherein the first modification layer and the second modification layer are independently modification layers based on catechol or derivatives thereof. According to the interface-enhanced gel-based electrochromic device, the excellent ion migration characteristic of the hydrogel electrolyte is utilized, and the strength and toughness of the electrolyte can be improved. The gel electrolyte layer based on the structure provided by the invention has excellent interface bonding force, and is convenient for ions to quickly migrate under the driving of an external field, so that the electrochromic device has excellent cycling stability.

The invention discloses a triggering probiotic-drug conjugate and a preparation method and application thereof, and belongs to the technical field of oral drug delivery systems, the triggering probiotic-drug conjugate comprises probiotics, an adhesive inner layer formed by coordination of tannic acid and Fe < 3 + >, and an outer layer formed by pterostilbene-phospholipid bridged by ROS-responsive thioether bonds and cholesterol; the inner layer coats the surfaces of the probiotics through coordination, and the outer layer coats the outer part of the inner layer through self-assembly. An outer lipid layer is decomposed under high-concentration ROS in an inflammation colon area, and probiotics coated with pterostilbene and a tannic acid layer are released. Pterostilbene relieves inflammation and rebuilds a pathological microenvironment, and catechol groups in a tannic acid layer and the surface of the intestinal tract generate multiple interactions to promote planting of probiotics. In UC mouse models, the conjugates exhibit enhanced therapeutic effects by inhibiting inflammation, restoring intestinal barrier function, and improving intestinal microbiota homeostasis. The invention has important transformation potential in clinical application of gastrointestinal diseases.

The invention relates to the technical field of adhesives, and provides a wet state maintaining type vegetable protein adhesive as well as a preparation method and application thereof. The hyperbranched catechol polymer adhesive filler disclosed by the invention is prepared by carrying out ring-opening reaction on epoxy groups of neopentyl glycol diglycidyl ether and pentaerythritol tetraglycidyl ether and amino groups of dopamine hydrochloride. Meanwhile, the vegetable protein adhesive is prepared from vegetable protein, a cross-linking agent and the adhesive filler according to a certain proportion. According to the adhesive filler and the corresponding vegetable protein adhesive, the defect that in the prior art, a bio-based adhesive, especially a vegetable protein adhesive, is poor in product performance due to poor moisture retention can be overcome.

The invention provides a Klebsiella strain LBTRJ-2BN and application thereof, and belongs to the technical field of microorganisms. The Klebsiella sp. LBTRJ-2BN is preserved in the Guangdong Microbial Culture Collection Center, the address is the 5th floor of the building 59, No. 100 Courtyard, Xianlie Middle Road, Guangzhou City, the preservation date is December 25, 2024, and the preservation number is GDMCC No: 65677. The Klebsiella sp. LBTRJ-2BN provided by the invention can grow under the selective pressure of high-concentration catechol, and in the presence of other carbon sources, the catechol natural degrading bacteria still have better degrading capability on catechol. The Klebsiella sp. LBTRJ-2BN provided by the invention enriches catechol microbial degradation bacterium resources, provides strain resources and method reference for biological treatment of organic pollutants such as catechol, and has feasible application value.

The invention discloses a method for rapidly adsorbing heavy metal ions by a sulfydryl-functionalized non-woven fabric, relates to preparation of the sulfydryl-functionalized non-woven fabric and heavy metal adsorption application, and belongs to the technical field of functional materials and environmental protection. A catechol derivative, an oxidizing agent, a sulfur-containing coupling agent and the like are prepared into a reaction solution according to a certain proportion, then the non-woven fabric is immersed into the reaction solution for surface modification, the sulfydryl-functionalized non-woven fabric is prepared through reduction, and finally the sulfydryl-functionalized non-woven fabric is applied to adsorption and removal of heavy metal ions in water. The method has the advantages of being mild in condition, high in reaction speed and short in preparation period, the operation process is simple, universality is achieved, and the prepared functional material has the advantages of being good in heavy metal ion adsorption effect, good in functional modification layer stability and the like.

The present invention relates to bio-based bisphenol monomer of formula I and process of preparation thereof. Specifically, the present invention relates to bio-based bisphenol monomers of formula I containing multiple alkoxyl groups, and polyphenols. The bisphenol monomers of formula I contain built-in methoxyl groups, which represent latent phenolic hydroxyl groups and could conveniently be de-blocked to phenolic hydroxyl groups leading to formation of polyphenols containing catechol / phloroglucinol units with anti-oxidant properties and are potentially useful in various applications like cosmetics, polymer additives and so on. Further, the present invention relates to process of preparation of polymers using bisphenol monomer of formula I as valuable building blocks wherein the high performance thermoplastics are poly(ether sulfone)s, poly(ether ether ketone)s, polyesters, polycarbonates, polyphosphonates, etc. and thermosetting resins are epoxies, cyanate esters, phthalonitriles, propargyl ethers, etc.

The invention discloses a long-time strong-adhesion tissue repair patch and a preparation method thereof, and the preparation method comprises the following steps: adding an adhesion component, an anti-swelling component and alpha-ketoglutaric acid into a colloidal aqueous solution of a patch matrix material to obtain a precursor solution; and pouring the precursor solution into a patch mold, carrying out ultraviolet curing, and drying the obtained gel to obtain the patch. From the selection of materials and chemical bonds, physical and chemical bonds such as amido bonds, disulfide bonds and catechol groups are combined, so that the adhesion strength is improved, the adhesion duration is prolonged, and the adhesive has excellent anti-swelling performance and mechanical performance, can effectively isolate external saliva, food residues and the like when being applied to the oral cavity, reduces infection of ulcer wounds, and has a good application prospect. The dental ulcer healing is accelerated, and the method also has a relatively good application prospect in the field of tissue repair.

The invention discloses a high-performance modified resin material and a preparation method thereof, and belongs to the technical field of resin composite material preparation. The high-performance modified resin material is prepared from a main agent, a curing agent and nano filler, the main agent is prepared from 70 to 100 parts of bisphenol epoxy resin, 20 to 40 parts of dopamine modified epoxy resin, 5 to 15 parts of diglycidyl ether, 3 to 15 parts of flame retardant, 0.3 to 1 part of anti-settling agent, 0.05 to 0.3 part of defoaming agent and 0.1 to 0.5 part of pigment; the curing agent is prepared from the following components in parts by weight: 15-35 parts of a rapid curing agent, 10-30 parts of a toughening curing agent, 5-15 parts of a dopamine modified amine curing agent, 0.5-3 parts of an accelerant and 0.1-0.5 part of an antioxidant; and the nano filler is nano-particle coated PDA (potato dextrose agar). Amino of dopamine reacts with epoxy group, catechol is oxidized to generate a quinoneform structure, thiol-epoxy click reaction is catalyzed, and the material can be rapidly cured at low temperature; a flexible chain (-S-CH-CH-) of polymercaptan and a polyether chain of amine-terminated polyether are synergistically toughened, so that the toughness and impact resistance of the material can be improved.

The invention discloses a polyurethane coating and a preparation method thereof, and belongs to the technical field of antibacterial coatings. The preparation method of the polyurethane coating comprises the following steps: carrying out acyl chloride substitution reaction on a phenolic substance and a chlorine donor to obtain an intermediate reactant, and carrying out conjugate addition reaction on the intermediate reactant and an amine substance with hydroxyl groups at two ends to obtain antibacterial diol; reacting the antibacterial diol with isocyanate to obtain a polyurethane coating; the phenolic substance is selected from at least one of thymol, carvacrol, paeonol, catechol and theaflavin. The antibacterial coating is applied to the aspect of an antibacterial coating of a food contact part, the problem that the antibacterial property of an existing antibacterial coating is difficult to last is solved, and the antibacterial coating has the synergistic antibacterial effect of killing and defending bacteria.

The invention provides a Ni-molybdenum oxide / Nb2O5 nano composite catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The catalyst precursor is prepared by adopting an excessive impregnation method, then the Ni-molybdenum oxide / Nb2O5 nano-composite catalyst is prepared by adopting a hydrogen reduction treatment method, active components in the catalyst are uniformly loaded, and the catalyst has excellent self-hydrogen hydrothermal catalytic performance. The Ni-molybdenum oxide / Nb2O5 nano composite catalyst prepared by the invention can minimize the dissociation energy of a C-O bond, promote the breakage of the C-O bond, enable the reaction to be carried out in a forward direction, and realize high-value conversion of guaiacol to catechol under mild reaction conditions without exogenous hydrogen.

The invention discloses a full-bio-based adhesive based on epoxidized soybean oil and a preparation method of the full-bio-based adhesive. Specifically, according to the method, epoxidized soybean oil is taken as a reaction substrate, citric acid is taken as a nucleophilic reagent to open an epoxy ring of the epoxidized soybean oil, tannic acid is taken as a catechol-like compound to provide adhesion performance after cross-linking polymerization, and a bio-based cross-linked network structure with excellent adhesion performance is constructed. The environment-friendly adhesive is researched and developed on the basis of full bio-based raw materials, and has the remarkable characteristics of no toxicity, reproducibility, environment friendliness and the like. The adhesive adopts an efficient one-pot synthesis process, the preparation process is simple and convenient, and industrial mass production is easy to realize. And the performance is excellent, the tensile strength and long-term stability are excellent, and due to the outstanding water resistance and mildew-proof performance, the coating stands out of similar products. In addition, the product is wide in raw material source and obvious in cost advantage, and has high performance and economic benefits.

The invention discloses a waterproof pressure-sensitive adhesive tape and a production process thereof, and relates to the technical field of pressure-sensitive adhesives. The production process of the waterproof pressure-sensitive adhesive tape at least comprises the following steps: uniformly stirring 2-ethylhexyl acrylate, n-butyl acrylate, methyl methacrylate, acrylic acid, hydroxyethyl acrylate, a polymerizable catechol monomer and a solvent, and adding an initiator to react to obtain an acrylate copolymer solution; uniformly mixing fluorine-containing side chain diisocyanate and a catalyst, and dropwise adding the mixture into the acrylate copolymer solution for reaction to obtain a pressure-sensitive adhesive; mixing the pressure-sensitive adhesive solution with a curing agent, defoaming, coating on a base film, drying and curing to obtain the waterproof pressure-sensitive adhesive tape. The waterproof pressure-sensitive adhesive tape prepared by the invention has the characteristics of strong viscosity and good waterproofness.

The invention discloses a polyphenol modified carbon fiber reinforced sulfonated polyetheretherketone composite material and a preparation method thereof, and belongs to the field of polymer composites.The preparation method comprises the steps that a resin matrix and filler are filled into a mold to be sintered, the resin matrix is sulfonated polyetheretherketone, the filler comprises modified carbon fibers and nano-silicon dioxide, and the modified carbon fibers and the nano-silicon dioxide are sintered to obtain the polyphenol modified carbon fiber reinforced sulfonated polyetheretherketone composite material; the modified carbon fiber is prepared by taking carbon fiber, catechol and polyethyleneimine as raw materials in a Tris buffer solution. The hydration lubrication performance of a resin matrix is improved through sulfonated polyetheretherketone, the hydrophilic property is enhanced, a polyphenol coating is formed through self-polymerization reaction on the surfaces of the carbon fibers, the adhesion performance of the surfaces of the fibers is improved through the pi-pi stacking effect, and the interface bonding force between the carbon fibers and the modified resin matrix is enhanced; the nano silicon dioxide is introduced to modify the matrix of the composite material, so that not only is the overall wettability of the material optimized, but also the mechanical property and the wear resistance are effectively improved, and the final composite material has the characteristics of high strength and low friction.