8212 results about "Phenols" patented technology

The invention discloses a core-shell structure flame retardant with a thermo-oxidative aging resistance function and application of the core-shell structure flame retardant in preparation of a flame-retardant material, and belongs to the technical field of flame retardance. The core-shell structure flame retardant with the thermo-oxidative aging resistant function is composed of the core and the shell structure, the core is the flame retardant, the shell structure is a polymer containing hindered phenol and low-valence phosphorus, on one hand, hydrophobicity of the flame retardant can be improved, on the other hand, compatibility and dispersity of the flame retardant in a polymeric material can be improved, and the flame retardant performance is improved. Further, the flame retardant property and the mechanical property of the polymer material are improved. Besides, hindered phenol and low-valence phosphorus in the shell polymer not only can capture RO.and ROO.free radicals and inhibit the thermo-oxidative aging process of the polymer, but also can play a role in capturing the free radicals in the combustion process, so that the flame retardant property of the polymer material is further improved. The flame retardant disclosed by the invention has excellent flame retardance and thermal aging resistance, and can be applied to the fields of buildings, traffic, chemical engineering, machinery, communication, energy sources and the like.

The invention discloses a photo-thermal aging resistant polyester composite material and a preparation method thereof, a modified monomer, a modified filler, benzophenone, terephthalic acid and neopentyl glycol are subjected to esterification condensation polymerization to prepare the composite material, and the modified monomer is added, so that the prepared polyester molecule is of a branched structure; the side chain of a polyester molecule and the surface of the modified filler both contain unsaturated double bonds which can react after being irradiated by ultraviolet light, so that the number of crosslinking points of the composite material is increased, the crosslinking density is further improved, and the anti-aging effect of the material is further improved; the modified filler can improve the high-temperature-resistant effect of the composite material, the modified filler is matched with the hindered phenol structure of the side chain to further improve the heat aging-resistant effect of the composite material, hydroxyl and ketone groups on the modified filler form intramolecular hydrogen bonds, light energy can be converted into heat energy to be released, and then the light aging-resistant effect of the composite material is improved.

The preparation method comprises the following steps: mixing a tannic acid solution and a tetravalent cerium salt solution, adjusting the pH value to 9-11, and reacting to obtain the cerium tannate nano-enzyme, the molar ratio of the tannic acid to the tetravalent cerium salt is (1-4): 1; the hydration dynamic diameter of the cerium tannate nano-enzyme is 20 to 80 nm. The TA-Ce nano-enzyme prepared by the preparation method disclosed by the invention is smaller in particle size, can keep stable and good dispersibility in a physiological environment, and has good biocompatibility, low hemolysis rate and small systemic toxicity; meanwhile, the compound has good kidney targeting property, can be effectively enriched into the injured kidney, eliminates various ROS (reactive oxygen species) and relieves oxidative stress by utilizing unique redox cycle between Ce < 3 + > and Ce < 4 + > states, and has a good effect in treating acute kidney injury induced by rhabdomyolysis and / or cis-platinum. The research lays a foundation for the metal polyphenol nano material in the treatment of acute kidney injury.

The invention discloses a nano-enzyme as well as a preparation method and application thereof, and relates to the technical field of nano-enzymes. According to the preparation method, natural polyphenol, a cerium source and polyethylene glycol are mixed to prepare the novel polyphenol nano-enzyme, the preparation method is simple and easy to implement, the preparation cost is low, the prepared nano-enzyme has good biocompatibility, and a new way is provided for effective treatment of inflammatory diseases.

The invention belongs to the technical field of gene sequencing, and particularly relates to an efficient and high-throughput gene sequencing data processing system. The data processing system comprises a data acquisition module, a data preprocessing module, a data storage and management module, a data comparison and alignment module, a variation detection module, a data integration and analysis module, a visualization and report module and a quality control and verification module, and the data acquisition module is used for extracting DNA or RNA and comprises phenol chloroform extraction, column purification and magnetic bead extraction; and detecting the concentration and the quality of the sample by using a spectrophotometer or a fluorescence quantifier, and carrying out pollution removal and degradation treatment on the extracted nucleic acid. According to the method, a comprehensive, accurate and efficient data processing solution can be provided for genomics research by optimizing the data processing flow, improving the data quality, enhancing the analysis capability and supporting automation.

The invention relates to an antibacterial PP material and a preparation method thereof, and belongs to the technical field of high polymer materials. The antibacterial PP material is prepared from the following components in parts by weight: 60 to 80 parts of PP resin, 2 to 4 parts of a surfactant, 0.5 to 1.5 parts of a modified antibacterial agent, 0.5 to 1.5 parts of a flame retardant and 0.2 to 0.8 part of an antioxidant, titanium ions in the modified antibacterial agent destroy bacterial cell walls, quaternized intermediate products react with proteins of cell membranes to accelerate bacterial death, and in addition, phenolic hydroxyl groups absorb ultraviolet rays with different wavelengths to inhibit the light aging process; a compact and continuous carbon layer is formed during combustion of the flame retardant and cooperates with phosphorus-oxygen double bonds and melamine, the flame retardant efficiency is improved, aluminum hydroxide coats the surface, hydroxyl is subjected to heat absorption decomposition during combustion, the surface temperature of combustible materials is stabilized, meanwhile, an inert aluminum oxide layer is formed, and the flammability is reduced. The antibacterial PP material prepared by the invention not only has good antibacterial and anti-aging effects, but also has excellent flame retardant property.

The invention relates to the technical field of polypropylene plastics, in particular to a high-strength antibacterial polypropylene plastic and a preparation method thereof. The antibacterial polypropylene material comprises the following components in parts by weight: 60-80 parts of polypropylene resin, 5-15 parts of nano titanium dioxide and nano zinc oxide composite particles modified by a special organosilicon polymer, 3-8 parts of an antibacterial agent compounded by quaternary ammonium salt and bioactive peptide, 5-10 parts of a core-shell structure MBS toughening agent and 0.5-2 parts of a hindered phenol-thioether composite antioxidant. 1-3 parts of a calcium stearate processing aid; and 3-8 parts of dopamine modified chopped carbon fibers. The composite material is high in strength, tensile strength, bending strength and impact strength are remarkably improved, and larger external force can be borne; the antibacterial performance is excellent, and the antibacterial rate reaches 95%-99%; the preparation process is environment-friendly and efficient, and the product is good in stability and recoverable; product safety can be guaranteed, the service life is prolonged, and economic and social benefits are good.

The invention discloses a calendula double-bacterium fermentation product as well as a preparation method and application thereof, and relates to the technical field of plant fermentation. The preparation method of the calendula double-bacterium fermentation product disclosed by the invention comprises the following steps: carrying out primary fermentation by using lactobacillus plantarum, then carrying out secondary fermentation by using saccharomyces cerevisiae, and carrying out sterilization and filtration treatment on the calendula fermentation liquid subjected to secondary fermentation, so as to obtain the calendula fermentation liquid. The calendula fermentation liquor is subjected to combined fermentation through lactobacillus plantarum and saccharomyces cerevisiae, and the content of polyphenol and flavone in the calendula double-bacterium fermentation product is remarkably increased. Meanwhile, the calendula double-bacterium fermentation product has the effects of preserving moisture, resisting oxidation, relieving and controlling oil, and has a wide application prospect in the field of cosmetics.

The invention provides a preparation method of a polyester loose nanofiltration membrane, and belongs to the technical field of nanofiltration membrane preparation. The preparation method provided by the invention comprises the following steps: dissolving a water-phase monomer in a sodium hydroxide solution to obtain a NaOH solution containing the water-phase monomer; soaking an ultrafiltration membrane in the NaOH solution containing the aqueous phase monomer to obtain an ultrafiltration membrane supporting layer; contacting the ultrafiltration membrane supporting layer with a trimesoyl chloride solution, and carrying out interfacial polymerization reaction to obtain a primary nanofiltration membrane; and carrying out heat treatment on the primary nanofiltration membrane to obtain the polyester loose nanofiltration membrane. The water-phase monomer is a compound which has a non-planar distorted structure and simultaneously contains phenolic hydroxyl groups and alcoholic hydroxyl groups. The method provided by the invention is simple and easy to implement, relatively low in required cost and beneficial to realizing large-scale industrial production of the high-efficiency nanofiltration membrane. The polyester loose nanofiltration membrane prepared by the preparation method disclosed by the invention has relatively high permeation flux, and meanwhile, a relatively high Na2SO4 retention rate can be kept.

The invention is suitable for the technical field of materials, and provides a binderless fiberboard and a preparation method thereof.The preparation method comprises the steps that wood fibers are subjected to oxidation treatment, and an intermediate is obtained; placing the intermediate in a metal ion solution for non-covalent bond coordination treatment, extruding the solution, and adding polyphenol into the fiber for chelation to obtain a chelated fiber; and assembling the chelate fibers into a plate blank, and carrying out hot pressing treatment to obtain the product. Metal ions and lignin hydroxyl are bonded and coordinated through an activation method, then the metal ions and polyphenol are chelated to form self-adhesion, meanwhile, the non-adhesive fiberboard formed by tightly interweaving and stacking the fibers can reach the national standard in mechanical strength and water absorption expansion rate, the preparation method is simple and easy to implement, raw materials are easy to obtain, and the production cost is low. The method is suitable for mass production; by means of the formed double-network structure, the binderless fiberboard is more compact, higher in stability and excellent in internal bonding strength, bending strength and other mechanical properties. Zero formaldehyde release of the fiberboard is achieved, and the cost is lower.

The invention provides a metal polyphenol nanoparticle, a preparation method thereof and an application of the metal polyphenol nanoparticle in preparation of a medicine for treating acute lung injury, the metal polyphenol nanoparticle is formed by self-assembly of metal ions and polyphenol, the metal ions are selected from Mg < 2 + >, Zn < 2 + >, Mn < 2 + > or Cu < 2 + >, and the polyphenol is selected from Mg < 2 + >, Zn < 2 + >, Mn < 2 + > or Cu < 2 + >. The polyphenol is selected from epigallocatechin gallate (EGCG), caffeic acid (CA), chlorogenic acid (CGA), gallic acid (GA) and luteolin (LUT). The metal polyphenol nanoparticles are used for preparing a medicine for treating acute lung injury induced by sepsis, pneumonia, serious trauma or inhalation injury, and the medicine further comprises a pharmaceutically acceptable carrier. The metal polyphenol nanoparticles provided by the invention are simple in preparation process and high in biological safety, polyphenol and metal ions synergistically enhance the anti-inflammatory and antioxidant activity, and the metal polyphenol nanoparticles are superior to the single use of polyphenol or metal ions.

The invention belongs to the technical field of food microorganisms, and relates to lactobacillus plantarum and application thereof in preparation of products for relieving insomnia. The preservation number of the lactobacillus plantarum is GDMCC No: 65061. The lactobacillus plantarum can be applied to efficient fermentation of spina date seed juice, the content of GABA, polypeptide, total phenols and total flavonoids in the spina date seed juice is increased, and the content of spinosin, 6 ''-feruloyl spinosin, jujuboside A, jujuboside B and betulinic acid is increased; the reduction of whole brain coefficient and the increase of liver coefficient caused by long-term insomnia are relieved, the bad condition caused by long-term insomnia in a hippocampus DG region in the brain of the mouse is improved, the sleep time of the mouse is prolonged, and the insomnia symptom of the mouse is relieved; the content of inhibitory neurotransmitters 5-hydroxytryptamine, melatonin and gamma-aminobutyric acid in the hypothalamus of the mouse is increased, the content of excitatory neurotransmitter glutamic acid is reduced, and the reduction of organism immunity and oxidative stress of brain tissues caused by insomnia are relieved.

The invention discloses a preparation method of an interface-modified flame-retardant polypropylene-based bamboo-plastic composite material. According to the method, a modification solution composed of a polyphenol component and a boron-containing component is adopted, bamboo powder is treated under the normal-temperature stirring condition, and the interface modified bamboo powder is successfully prepared. The mechanism is that polyphenol and a boron-containing component are subjected to a coordination reaction on the surface of bamboo powder, and a reversible borate dynamic covalent bond is constructed. The dynamic bond has a temperature response characteristic: reversible dissociation is realized during high-temperature processing, so that the melt viscosity of a composite system is reduced, and the processing fluidity is improved; the interface bonding force between the bamboo powder and the polypropylene matrix and the mechanical strength of the composite material are remarkably enhanced. In addition, the introduced boron element is used as an efficient flame-retardant component and promotes generation of a compact protective carbon layer during combustion, so that the flame-retardant property of the composite material is comprehensively improved.

According to the preparation method of the Huangshan pine needle polyphenol and the acne-removing and inflammation-diminishing essence, the Huangshan pine needle polyphenol is prepared by adopting a microbial solid fermentation method, release of soluble polyphenol substances in Huangshan pine needles is remarkably promoted, and compared with an unfermented group, the polyphenol content of pine needles reaches up to 146.32 + / -2.53 mg / g and is increased by 1.89 times. The pine needle polyphenol component is prepared by adopting ultrasonic-assisted deep eutectic solvent extraction, membrane filtration and separation and purification technologies, the method has the advantages of short extraction time, low extraction temperature, environmental friendliness and the like, the structural integrity of pine needle polyphenol is maintained to the greatest extent, and the antibacterial activity of polyphenol is remarkably improved. The acne-removing and inflammation-diminishing essence containing the Huangshan pine needle polyphenol is soft in formula and high in safety, has remarkable dual effects of moisturizing and acne removing, can effectively inhibit skin inflammation, promote repair of acne skin, maintain the health state of the skin and meet the requirements of people, and can be widely applied to the field of skin care products.

The invention discloses preparation and application of bionic cerium-based polyphenol nano-enzyme for treating rheumatoid arthritis, and belongs to the field of medical preparations. The method comprises the following steps: respectively complexing cerium ions and tannic acid or epicatechin gallate to prepare cerium-based polyphenol nano-enzyme, and then preparing the cerium-based polyphenol nano-enzyme wrapped by a macrophage membrane. And loading the cerium-based polyphenol nano-enzyme wrapped by the macrophage membrane into the hydrogel to prepare the hyaluronic acid-based hydrogel. The cerium-based polyphenol nano-enzyme and the hyaluronic acid-based hydrogel are characterized, it is verified that the cerium-based polyphenol nano-enzyme and the hyaluronic acid-based hydrogel are successfully synthesized, the particle size of CeTA is about 22 nm, the particle size of M-CeTA is increased to 273 nm, the particle size of CeECG is about 95 nm, and the particle size of M-CeECG is increased to 292 nm. In-vitro experiments prove that the M-CeTA and the M-CeECG do not show obvious cytotoxicity when being less than 80 mu g / mL, and have an obvious inhibition effect on expression of cell inflammatory factors on inflammatory cells.

The invention discloses a neodymium iron boron composite magnet and a production process thereof, and belongs to the technical field of magnetic materials. Carrying out sand blasting and phosphoric acid treatment on the neodymium-iron-boron magnet to obtain a pretreated neodymium-iron-boron magnet; and mixing 50-60 parts of epoxy resin, 30-40 parts of polyurethane and 10-20 parts of polysiloxane, then adding 10-20 parts of a solvent, 8-16 parts of filler, 3-5 parts of an auxiliary agent and 1-3 parts of dibenzoyl peroxide, stirring to obtain a protective coating, then spraying the protective coating on the surface of the pretreated neodymium-iron-boron magnet, and curing to obtain the neodymium-iron-boron composite magnet. The auxiliary agent contains a hindered phenol structure, a benzotriazole structure and fluorine atoms, and a hybrid cross-linked network structure is formed among the auxiliary agent, the epoxy resin and the filler, so that the auxiliary agent and the filler can be highly dispersed and stably exist in the protective coating and fully play roles, and the protective coating has the advantages that the protective coating is more stable in performance due to the combined action of the other raw materials in the protective coating; the neodymium-iron-boron composite magnet has excellent and stable water resistance, aging resistance, corrosion resistance and the like.

The invention provides a coating preservation material as well as a preparation method and application thereof, and belongs to the technical field of chemical modification of biomass organic polymer materials. The structural formula of the chitosan / polyphenol / quaternary phosphonium salt derivative disclosed by the invention is as shown in # imgabs0 #. The preparation method comprises the following steps: modifying chitosan by using natural phenolic acid and quaternary phosphonium salt to prepare an amphiphilic chitosan derivative; then preparing a plant essential oil microcapsule by taking the amphiphilic chitosan derivative as a wall material and plant essential oil as a core material; and finally, compounding the plant essential oil microcapsules with a film-forming material to construct a film-coating fresh-keeping material, and applying the film-coating fresh-keeping material to fresh keeping of fruits and vegetables.

The invention discloses a probiotic-polyphenol nanoparticle colon-targeted co-delivery system as well as a preparation method and application thereof, and belongs to the field of biological medicines. The FCPs and hyaluronic acid (HA) are combined through non-covalent interaction, so that the hydrogel has colon targeting property and mucosal adhesion at the same time, and delivery of probiotics is facilitated. The hydrogel (HF) based on polysaccharide has good biocompatibility, and can be used for effectively encapsulating the probiotics and the natural products. Then, the PDA-TH NPs and BA are incorporated into the polysaccharide chain network of HF, and finally the BA-HF-PDAT targeted co-delivery system is constructed. The BA (at) HF-PDAT targeted co-delivery system can protect BA from serious gastrointestinal stress, and is jointly assembled with PDT-TH NPs to realize dual slow release of thymol (Thy), so that the treatment effect of BA and Thy is improved, and the BA (at) HF-PDAT targeted co-delivery system contributes to treatment of clostridium difficile infection (CDI).

The invention discloses a preparation method of antistatic modified chinlon filaments, and relates to the field of chinlon filaments. When the antistatic modified chinlon filament is prepared, (formylmethyl) diethyl phosphate and 1-aminopyrrole react to prepare pyrrole diethyl phosphate; reacting the hydroxylated multi-walled carbon nanotube with pyrrole diethyl phosphate to obtain a modified multi-walled carbon nanotube; the preparation method comprises the following steps: reacting 2, 2 '-bipyridine-5, 5'-dicarboxylic acid with 2-amino-5-nitrophenol, and then reducing to obtain a benzoxazole diamine monomer; then, adipic acid, 1, 5-diaminopentane and a benzoxazole diamine monomer are subjected to a reaction, and modified polyamide is prepared; uniformly mixing the modified polyamide, the modified multi-walled carbon nanotubes, pyrrole, ferric trichloride and copper chloride, and performing melt spinning to obtain the antistatic modified polyamide filament. The antistatic modified chinlon filament prepared by the invention has excellent antistatic, flame-retardant, anti-aging and mechanical properties.

The invention provides a preparation method of cereal fermentation broth postbiotics and application of the cereal fermentation broth postbiotics in improvement of systemic chronic inflammation and reduction of cholesterol and low-density lipoprotein, and belongs to the technical field of fermentation engineering. The invention provides a preparation method of cereal fermentation broth metabiotics, which is characterized in that mixed cereals are used as raw materials, anaerobic fermentation is carried out by using compound enzymes and various bacteria, and polysaccharides and proteins in the cereal raw materials can be quickly converted into functional small molecular substances, such as polypeptides, total phenols and total flavonoids. The cereal fermentation broth metagen can inhibit secretion of a macrophage proinflammatory medium, inhibit generation of inflammatory factors of liver, heart and intestinal tissues, and improve activation of adipose tissue macrophages related to body inflammation. After the cereal fermentation liquor is subjected to post-biogen treatment, glucose and lipid metabolism disorder can be effectively improved, liver function damage can be relieved, and the intestinal barrier function can be effectively improved.

The invention provides an anti-aging flame-retardant epoxy resin coating and a preparation process thereof, and belongs to the technical field of coating preparation. The preparation process comprises the following steps: preparing the flame-retardant additive; preparing a coated modified black phosphorus nanosheet; preparing modified hollow glass beads; preparing the epoxy resin coating. The preparation method comprises the following steps: dissolving 3, 4-dihydroxy benzaldehyde and 2-amino-4-methylphenol in absolute ethyl alcohol, carrying out a heating reflux reaction, carrying out dehydration condensation on an aldehyde group in the 3, 4-dihydroxy benzaldehyde and an amino group in the 2-amino-4-methylphenol to generate an imine bond-containing intermediate, respectively dissolving the intermediate and phosphonitrilic chloride trimer, and carrying out a reaction to obtain the phosphonitrilic chloride trimer. The preparation method comprises the following steps: firstly, adding phosphonitrilic chloride into an intermediate, then mixing for reaction, enabling phenolic hydroxyl groups in the intermediate and phosphonitrilic chloride trimer to be subjected to nucleophilic substitution reaction to generate the flame-retardant additive containing phosphorus and a Schiff base structure, and the flame-retardant additive has relatively good compatibility with an epoxy resin matrix, is not easy to separate out and can effectively improve the flame-retardant property of the epoxy resin coating.

The invention discloses a tyrosine phenol lyase mutant and application of the tyrosine phenol lyase mutant in synthesis of levodobar. The tyrosine phenol lyase mutant is obtained by carrying out site-specific mutagenesis on the basis of wild type tyrosine phenol lyase. The mutant obtained through transformation can transform more substrates, the yield is also obviously improved, and the method is suitable for industrial production of levodopa.

The invention discloses a high-temperature-resistant power tube and a production process thereof, and belongs to the technical field of power tube preparation. The high-temperature-resistant electric power tube is prepared from, by weight, 60-80 parts of a high-temperature-resistant base material, 10-30 parts of carbon fibers and 1-5 parts of a modified anti-aging agent, the high-temperature-resistant base material is prepared from 2, 3, 4-trifluorobenzaldehyde, malonic acid, oxynaphthalene propionic acid, trifluoroacetic anhydride and 2, 2-bis [4-(4-aminophenoxy) phenyl] propane, and the modified anti-aging agent is prepared from 2, 3, 4-trifluorobenzaldehyde, malonic acid, oxynaphthalene propionic acid, trifluoroacetic anhydride and 2, 2-bis [4-(4-aminophenoxy) phenyl] propane. The modified anti-aging agent is prepared from absolute ethyl alcohol, paeonol, sodium hydroxide and 2-methoxybenzaldehyde. The power tube prepared by the method has excellent high temperature resistance, mechanical property and aging resistance.

The invention belongs to the technical field of sewage treatment, and particularly relates to a demulsifier for eliminating an oil-water interface emulsion layer in oilfield produced liquid treatment and a preparation method of the demulsifier. The preparation method comprises the following steps: adding acrylamide, 1-allyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imine salt, allyl tributyl phosphonium chloride and deionized water into a first reactor, and heating and dissolving the acrylamide, the 1-allyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imine salt, the allyl tributyl phosphonium chloride and the deionized water; adding allyl (diisopropylamino) dimethylsilane, butyl acrylate, deionized water, octylphenol polyoxyethylene ether-10, lauryl sodium sulfate and monopotassium phosphate into the second reactor, and stirring to obtain an emulsion; adding an initiator and sodium hydrogen sulfite into a second reactor, carrying out heating and heat preservation reaction, pouring the mixed solution in the first reactor, and continuously carrying out reaction, heating and heat preservation to obtain a viscous liquid; and drying and granulating the viscous liquid to obtain the demulsifier. The demulsifier provided by the invention has the characteristics of simple synthesis process and high demulsification rate.

The invention relates to the technical field of cosmetics, and provides a composition containing a dendrobium officinale enzymolysis extract, which is prepared from the following components in percentage by mass: 18 to 22 percent of dendrobium officinale enzymolysis extract, 9 to 11 percent of chitosan oligosaccharide, 6.5 to 7.5 percent of bionic moisturizing enhancer, 0.1 to 0.2 percent of sodium alginate, 0.05 to 0.15 percent of citric acid / sodium citrate buffer pair and 60.4 to 65.4 percent of solvent matrix. By combining low-temperature enzymolysis with a biological purification process, efficient extraction of dendrobium candidum polysaccharides and phenolic substances is realized, dendrophenol oxidation inactivation caused by high temperature can be effectively avoided, hydrochloric acid residues in chitosan oligosaccharide preparation are effectively removed, formula irritation is remarkably reduced, and the dendrobium candidum extract is more suitable for sensitive skin care; the components in the composition have a synergistic effect, the dendrobium officinale enzymolysis extract and the enzymolysis chitosan oligosaccharide form a composite moisturizing network, the moisturizing rate is remarkably increased, the oxidation resistance is remarkably improved, and the composition can be applied to products such as essence, masks and freeze-dried powder.

The invention relates to the technical field of flame retardance, and discloses a flame-retardant coating and a preparation method thereof.The flame-retardant coating is obtained by adding phenolic resin, polycarbonate, phosphorus-containing modified phenolic resin, boric acid-containing benzoxazine, an organic silicon resin defoaming agent, a propylene glycol film-forming agent and water into a stirrer and stirring. The flame-retardant coating contains a large amount of anacardol, long chains in the anacardol can also be crosslinked to form a net-shaped structure, a net-shaped carbon skeleton structure is formed under high-temperature carbonization, degradation products are inhibited during combustion, and the flame-retardant coating has good fire resistance; wherein oxazolidinone generated by reaction of an epoxy group of epoxidized phenolic resin and an isocyanate group of hexamethylene diisocyanate is a heterocyclic ring with very high heat resistance and also plays a role in synergistic fire resistance; the flame-retardant coating contains a large amount of phosphorus elements, sulfur elements and nitrogen elements, has a good flame-retardant effect, and achieves a synergistic flame-retardant effect.

The invention relates to a high-temperature proton exchange membrane, in particular to a high-temperature proton exchange membrane based on silica cross-linked polybenzimidazole and a preparation method of the high-temperature proton exchange membrane. The preparation method comprises the following steps: polymerizing 3, 3 '-diaminobenzidine, 4, 4'-diphenyl ether dicarboxylic acid and 5-hydroxyisophthalic acid to form a polybenzimidazole main chain containing an ether bond and a phenolic hydroxyl group, grafting a silane coupling agent on the polybenzimidazole main chain, and finally carrying out membrane formation and acid catalysis treatment to obtain the high-temperature proton exchange membrane based on silica crosslinked polybenzimidazole. A silicon-oxygen network structure is introduced into a polybenzimidazole main chain, so that the phosphoric acid retention rate and the oxidation resistance of the polymer film can be effectively improved, and the service life of the polymer film is prolonged.

The invention discloses a hydrogel compound, a preparation method and application, and belongs to the technical field of hydrogel. The hydrogel compound provided by the invention is prepared from the following raw materials: a hydrogel matrix, sodium glycerophosphate pentahydrate and a functional drug, the hydrogel matrix is prepared from chitosan, hydroxybutyl chitosan and methacrylated gelatin; the functional medicines comprise cannabidiol, tobramycin and acetylsalicylic acid; the hydrogel compound provided by the invention has excellent mechanical properties and water vapor permeability, also has excellent slow release property and wound healing ability, and can be widely applied to preparation of medicines for treating wounds. In addition, the preparation method of the hydrogel compound provided by the invention is simple to operate and beneficial to practical application.

The invention belongs to the technical field of traditional Chinese medicine biology, and particularly relates to a pair of diastereoisomers in fresh bamboo juice as well as a preparation method and application of the diastereoisomers, in the diastereoisomers, a formula I is a dextroisomer and is named as (+)-fresh bamboo juice phenol A, and a formula II is a levoisomer and is named as (-)-fresh bamboo juice phenol A. According to the invention, a pair of diastereoisomer compounds (+)-fresh bamboo juice phenol A and (-)-fresh bamboo juice phenol A are successfully obtained from fresh bamboo juice, and an in-vitro cell test shows that the (+)-fresh bamboo juice phenol A has a remarkable inhibition effect on gastric cancer cells, liver cancer cells, colorectal cancer cells, bladder cancer cells and lung cancer cells of a human body; the compound can be used for preparing medicines for preventing or treating tumors, and has a wide application prospect.

The invention relates to a preparation method of a catalyst for synthesizing 2, 6-dimethylphenol, which comprises the following steps: mixing ferric salt, aluminum salt, magnesium salt, an acidic material and water to obtain a solution A; mixing sodium silicate, a template agent and water to obtain a solution B; mixing the solution A and the solution B, aging, crystallizing, filtering, drying and calcining to obtain a catalyst precursor I; mixing with an alkaline solution, and filtering to obtain a catalyst precursor II; then mixing with an acidic solution, filtering to obtain a solid, and then washing and calcining to obtain a catalyst; the preparation method of the 2, 6-dimethylphenol comprises the following step of preparing the 2, 6-dimethylphenol by taking methanol, phenol, water and benzoic acid as raw materials in the presence of the catalyst. The catalyst provided by the invention has good catalytic activity, reduces the problem of carbon deposition, and has good selectivity and high phenol conversion rate when being used for preparing 2, 6-dimethylphenol.