413 results about "Vanillin" patented technology

The invention provides a personalized functional nutritional tea point rich in tea polyphenol and resveratrol and a 3D printing manufacturing method. The personalized functional nutritional tea point comprises a shell and an inner core, wherein the shell and the inner core are respectively a shell gel material and an inner core gel material; the inner core gel material comprises a water-oil double-gel material rich in tea polyphenol and resveratrol; wherein the water-oil double-gel material is prepared by the following steps: adding chitosan, betaine and vanillin into a mixed solution of corn starch, chickpea protein and water, heating and incubating to obtain hydrogel; and dissolving the tea polyphenol in the hydrogel to obtain the tea polyphenol hydrogel. The oleogel is obtained by melting and mixing beeswax and linseed oil, and then dissolving resveratrol in the oleogel; the personalized functional nutritional tea point is high in content of active ingredients of tea polyphenol and resveratrol and has heat stability, illumination stability and storage stability; the 3D coaxial printing technology is utilized, the functional components are further stabilized, tea points of various patterns and shapes can be obtained, and the method has personalized food preparation and application value.

The invention discloses a formula for brewing fen-flavor liquor by replacing peas with mung beans and a brewing method, and relates to the field of liquor brewing, the fen-flavor liquor is composed of yeast and sorghum, the mass percentage of the sorghum to the yeast is 100: 20-25, the yeast comprises barley, peas and mung beans, and the yeast comprises, by mass, 58-65% of barley, 30-35% of peas and 5-10% of mung beans. The starch content of sorghum is not less than 70%. According to the formula for brewing the fen-flavor liquor by replacing peas with the mung beans and the brewing method, the mung beans are added, so that a liquor body is endowed with rounded and mellow taste experience while keeping the elegant and pure style of the traditional fen-flavor liquor; the special plant faint scent of the mung beans is also in delicate flavor synergy with vanillin and other substances of the pea source, so that the finished wine has the sensory characteristics of being clear but not light and mellow but not strong, the degree of dependence on high-price peas can be effectively reduced by introducing the mung bean raw material, and the raw material purchasing cost of per ton of wine is directly reduced.

The invention relates to the field of drain pipes, and discloses an antibacterial polypropylene noise-reduction drain pipe and a preparation method thereof, the antibacterial polypropylene noise-reduction drain pipe comprises polypropylene, modified glass fiber, an antibacterial additive, a compatilizer and a stabilizer; the modified glass fiber is prepared by performing formylation modification on glass fiber by using 3-aminopropyltriethoxysilane and glutaraldehyde, grafting triethylene tetramine and DOPO into a glass fiber structure, and then grafting a hindered phenol antioxidant; the antibacterial additive is prepared by compounding chitosan Schiff base and modified nano titanium dioxide, the chitosan Schiff base is prepared by utilizing a Schiff base reaction between chitosan and vanillin, and the modified nano titanium dioxide is prepared by utilizing isocyanate propyl triethoxy silane and ethyl glycolate to modify nano titanium dioxide. By adding the modified glass fiber and the antibacterial additive, the pipe is endowed with excellent heat resistance, aging resistance, flame retardance and antibacterial performance.

The invention belongs to the technical field of food fermentation production, and particularly relates to amycolatopsis thermophilus and application thereof. The amycolatopsis thermophilus is H-1 and is preserved in the China General Microbiological Culture Collection Center (CGMCC) on October 13, 2025, the preservation number is CGMCC No.36166, the classification name of the amycolatopsis thermophilus is Amycolatopsis thermophilus, and the preservation address of the amycolatopsis thermophilus is Beijing, China. The invention also discloses an application of the amycolatopsis thermophilus in preparation of vanillin. The highest yield of vanillin obtained by using the strain reaches 21.6 g / L.

The invention discloses a milk-flavor jelly-shaped intelligent response type suckling pig creep compound feed and a preparation method, relates to the technical field of animal feeds, and aims to solve the problems that a traditional feed is poor in palatability, nutrition release and physiological needs are mismatched, thermosensitive components are damaged by a high-temperature process and the like. And accurate release of nutrients is realized. The feed comprises an energy raw material, a protein raw material, intelligent response components (pH-sensitive sodium alginate microsphere loaded sodium butyrate / glutamine, temperature-sensitive xanthan gum-locust bean gum compound gel coated antibacterial peptide, and enzyme-sensitive lysine-lysine peptide bond cross-linked layer embedded glucose compound enzyme), a flavor system (vanillin microcapsules) and a konjac gum jelly matrix. A pH-temperature-enzyme triple response mechanism is adopted to adapt to the gastric acid gradient, body temperature fluctuation and pancreatin activity of suckling pigs; milk flavor slow release and nutrition release are in space-time synergy, and the ingestion frequency is increased by 40%; the konjac glucomannan matrix reduces dust, and the gel strength is greater than or equal to 750g / cm.

The invention relates to the field of copper-clad plates, and discloses a high-performance flame-retardant low-dielectric-loss copper-clad plate and a preparation method thereof.The copper-clad plate comprises epoxy resin, benzoxazine resin, composite filler, carboxyl-terminated nitrile rubber, an active diluent, a curing agent and the like; the composite filler is prepared by compounding flame-retardant modifier grafted graphene oxide and epoxy silane modified silicon dioxide hollow spheres; according to the flame-retardant modifier, boric acid and pentaerythritol are used for preparing a double-terminal hydroxyl boron-containing intermediate, then dichlorodiphenyl silane and phenylphosphonic dichloride react with hydroxyl groups at the two ends of the intermediate to prepare a flame-retardant intermediate, and amino silane and vanillic aldehyde react with chlorine atoms at the two ends of the intermediate to prepare an aldehyde modified flame-retardant intermediate; the copper-clad plate prepared by the preparation method disclosed by the invention is low in dielectric constant and dielectric loss, high in heat conductivity coefficient and good in flexibility, and also has excellent heat resistance and flame retardance.

The present invention provides a 4-vinylguaiacol oxygenase mutant for synthesizing vanillin, and an engineered bacterium thereof. The 4-vinylguaiacol oxygenase mutant is an enzyme having the sequence as shown in SEQ ID NO. 1, which exhibits a double-site mutation of D27P / T216M, D27P / M351F, D27P / Y156D, M351F / Y156D, T216M / Y156D or T216M / M351F, or a single-site mutation of T216M, T216L, S280M, G307P or M351F, and can be used for catalyzing 4-vinylguaiacol to generate vanillin.

The invention relates to the technical field of high polymer materials, and discloses a polypropylene material for an organic silicon product packaging bottle and a preparation method of the polypropylene material. The preparation method of the polypropylene material for the organic silicon product packaging bottle comprises the following steps: sequentially reacting polypropylene with a modifier and o-vanillin to obtain modified polypropylene; 4-amino-2, 2, 6, 6-tetramethylpiperidine is combined with the surface modified nanometer titanium dioxide, and modified nanometer titanium dioxide is obtained; and mixing the modified nano titanium dioxide, the modified polypropylene and the functionalized montmorillonite, carrying out melt blending, and extruding to obtain the polypropylene material for the organic silicon product packaging bottle. The polypropylene material provided by the invention has excellent mechanical properties, ultraviolet aging resistance, thermo-oxidative aging resistance and barrier property, can be used in organic silicon product packaging bottle materials, and improves the storage stability and safety of organic silicon products.

The invention discloses a solvent-free vanillin-hydroxyethyl acrylate double-system closed waterborne polyurethane emulsion adhesive as well as a preparation method and a use method thereof, and belongs to the field of waterborne polyurethane emulsion adhesives. The invention is mainly prepared from the following components in parts by weight: 40 to 50 parts of soft segment monomer, 50 to 60 parts of hard segment monomer, 20 to 40 parts of sealing agent, 0.02 to 0.15 part of catalyst, 0.4 to 0.6 part of emulsifier, 0.2 to 0.6 part of initiator, 4 to 12 parts of neutralizer, 5 to 15 parts of functional monomer and 340 to 360 parts of deionized water. According to the double-system closed waterborne polyurethane emulsion adhesive disclosed by the invention, rapid crosslinking curing of the adhesive can be realized through thermocuring, the highest hardness of an adhesive layer can reach about 26 MPa, the adhesive strength is high, and the mechanical property is relatively good.

The invention relates to the technical field of environment-friendly materials, and discloses a high-strength degradable packaging material and application of the high-strength degradable packaging material in cosmetic packaging materials.The preparation method of the high-strength degradable packaging material comprises the steps that polylactic acid, vanillic aldehyde modified polyester, polyadipic acid, triethyl citrate, calcium stearate and an antioxidant are added into a high-speed mixing machine, and the mixture is stirred to be uniform; mixing at 60 to 80 DEG C for 10 to 20 minutes to obtain a mixed material; the mixed material is subjected to melt blending through a double-screw extruder, the blending temperature is 160-180 DEG C, the screw rotating speed is 250-300 rpm, extrusion granulation and drying are conducted, and the high-strength degradable packaging material is obtained. The high-strength degradable packaging material can be applied to cosmetic packaging materials such as bottle bodies, bottle caps, hoses and packaging boxes. The prepared packaging material is high in mechanical strength and has good degradability and flame retardance.

The invention discloses a flame-retardant and self-repairing wood epoxy coating as well as a preparation method and application thereof, and belongs to the technical field of epoxy resin. The preparation method specifically comprises the following steps: (1) uniformly mixing vanillin, epichlorohydrin and tetrabutylammonium bromide, reacting, cooling, dropwise adding a NaOH aqueous solution, continuously reacting, washing, drying, precipitating and drying again to obtain bio-based epoxy resin for later use; (2) uniformly mixing methanol and hydrochloric acid, heating, carrying out condensation reflux, adding gamma-aminopropyltriethoxysilane, reacting, cooling, adding tetrahydrofuran, washing and carrying out vacuum drying to obtain polyhedral oligomeric silsesquioxane; and (3) dissolving polyhedral oligomeric silsesquioxane in the organic solvent, adding the bio-based epoxy resin, uniformly stirring, standing and curing to obtain the composite material. According to the invention, vanillin is used for constructing the epoxy resin containing imine bonds, so that the self-repairing and excellent flame-retardant properties of the epoxy resin are realized.

The invention belongs to the technical field of high polymer materials, and particularly discloses a lignin-based charring agent containing silicon and nitrogen flame-retardant elements and an imine structure for flame-retardant polylactic acid and a preparation method of the lignin-based charring agent. The flame-retardant polylactic acid is prepared from the following components in parts by weight: 90 to 97 parts of polylactic acid, 1 to 3.33 parts of lignin-based charring agent and 2 to 6.67 parts of ammonium polyphosphate. The bio-based charring agent disclosed by the invention contains silicon and nitrogen flame-retardant elements and an imine structure, has remarkable charring and flame-retardant effects, is high in charring capacity, and can endow the PLA with relatively good flame-retardant property by compounding with ammonium polyphosphate and adding 1% of the lignin-based charring agent; the lignin and vanillin which are used as main raw materials for synthesizing the charring agent are bio-based sources and are easy to obtain, the production process is simple, industrial production is easy, the preparation process is non-toxic and environment-friendly, the dependence of charring agent synthesis on petroleum-based raw materials can be effectively relieved, and the sustainable development trend of materials is met.

The invention discloses a preparation method of a low-chlorine composite environment-friendly coal transportation anti-freezing agent, and belongs to the technical field of anti-freezing solutions. The anti-freezing solution is used for solving the technical problems of complex components and poor anti-freezing and metal corrosion resistance of the anti-freezing solution for coal transportation in the prior art. The preparation method of the low-chlorine composite environment-friendly coal transportation anti-freezing agent comprises the following step: uniformly mixing the compound pour point depressant, the modified corrosion inhibitor, the thickening stabilizer and the industrial water to prepare the low-chlorine composite environment-friendly coal transportation anti-freezing agent. The compound pour point depressant comprises an organic pour point depressant and an inorganic pour point depressant; the organic pour point depressant is obtained by reacting unsaturated azole, sodium methallyl sulfonate and fumaric acid; the unsaturated nitrogen is obtained by reaction of an intermediate B and benzaldehyde, and the intermediate B is obtained by reaction of triazole and ethyl chloroacetate; the modified corrosion inhibitor is obtained by carrying out a reaction on potassium thiocyanate, benzoyl chloride and chitosan vanillin Schiff base. The anti-freezing solution prepared by the invention has the advantages of moderate fluidity, good metal corrosion resistance and good anti-freezing performance.

The invention belongs to the technical field of artificial veneers, and particularly relates to a fragrance-releasing blue-light-resistant microcapsule and a preparation method thereof, impregnated bond paper of the fragrance-releasing blue-light-resistant microcapsule, a fragrance-releasing blue-light-resistant ecological board and a preparation method of the fragrance-releasing blue-light-resistant ecological board. The technology aims at solving the problems of indoor blue light harm and air quality, and the problems that in the prior art, stable coexistence of a fragrance releasing component and an anti-blue-light component is difficult, and the technology is not compatible. The core is to prepare a multifunctional microcapsule through a unique interfacial polymerization and Schiff base in-situ reaction synchronous process: compound plant essential oil is taken as a core material, a vanillin-polyethyleneimine Schiff base conjugated structure is generated in situ in a wall material, and nanoparticles are cross-linked and fixed, so that a polyurethane / polyurea wall material is formed. The microcapsule is added into an adhesive layer of impregnated bond paper, and then is compounded with a base material through hot pressing to prepare the ecological board. The fragrance releasing and blue light resisting functions are successfully integrated on the board body, the effects that the blue light absorptivity at the wave band of 400-450 nm is larger than or equal to 70%, the formaldehyde release amount is smaller than or equal to 0.025 mg / m, and the fragrance is lasting are achieved, and the technology is highly compatible with an existing production line.

The invention belongs to the technical field of high polymer materials, and discloses a bio-based spiral macromolecular flame retardant as well as a preparation method and application thereof. The novel bio-based spiral macromolecular flame retardant PDVPA is successfully prepared on the basis of common industrial raw materials in combination with bio-based renewable vanillin, and the novel bio-based spiral macromolecular flame retardant PDVPA is applied to preparation of a flame-retardant TPEE composite material by adopting a melt blending process. The phosphorus element in the PDVPA molecular structure is used as a main flame-retardant functional group, and can promote the charring of the spiral structure of the PDVPA molecular structure; meanwhile, an imine bond can be subjected to a trimerization reaction under a high-temperature condition to form a cross-linked network structure, so that the molten drop phenomenon during TPEE combustion is effectively inhibited. The invention provides a new way for improving the safety performance of the high polymer material and reducing the dependence on fossil resources.

The invention discloses a method for efficiently trapping young tilapia mossambica. The method is mainly composed of specially-made baits and an improved ground cage. The bait is prepared from the following components: 20% of silkworm chrysalis meal, 20% of acete chinensis meal, 20% of earthworm powder, 12% of wheat germ powder, 11% of lamellar algae powder, 10% of snowflake powder, 5% of vital gluten and 2% of vanillin. The content of animal-derived protein in the bait is increased, so that strong fishy smell can be quickly diffused after the bait enters water; and the flaky algae powder, the snowflake powder and the wheat germ powder can form a suspended atomization belt around the bait, so that the bait is continuously peeled off, and the fish luring and retaining effects are better. The vanillin is added, so that the bait emits sweet milk fragrance, and surrounding tilapia mossambica can be effectively attracted. The following improvements are made on the ground cage: an anti-escape design is added; a bait bag is hung near the fish inlet; the space of a fish collecting area is expanded, so that the capturing efficiency is improved.

An antifungal composition including a first essential oil, and a second essential oil, where the composition is configured to reduce disease onset, pathogen spread, or a combination thereof. Further, an antifungal compound including one or more aroma compounds selected from 4-(4-hydroxyphenyl)-2-butanone, furaneol, ethyl methylphenylglycidate, ethyl hexanoate, ethyl butanoate, beta-ionone, alpha-ionone, (R)-(+)-limonene, (S)-(-)-limonene, cis-3-Hexen-1-ol, nerol, linalool, 2-heptanone, alpha-terpineol, beta-damascenone, β-caryophyllene, ethyl 2-methylbutanoate, β-myrcene, gamma-octalactone, alpha-humulene, nerolidol, (E,E)-2,4-decadienal, (E,E)-α-farnesene, vanillin, phenylethyl acetate, citral, 3-methylbutan-1-ol, or a combination thereof.

A cosmetic preparation containing 4-Hydroxy-3-methoxybenzaldehyde (INCI: vanillin), 4-(tert-butyl)-4'-methoxydibenzoylmethane (INCI: butyl methoxydibenzoylmethane) and di(propylene glycol) dibenzoate (INCI: dipropylene glycol dibenzoate).

The invention relates to the technical field of flame-retardant materials, and particularly discloses a full-bio-based reactive flame retardant, a zero-VOC bio-based basic flame-retardant waterborne polyurethane emulsion and a preparation method of the zero-VOC bio-based basic flame-retardant waterborne polyurethane emulsion. According to the invention, vanillin, lysine and phytic acid are taken as raw materials, a full-bio-based reactive flame retardant is synthesized, and the full-bio-based reactive flame retardant can form chemical bonding with a waterborne polyurethane matrix, so that intrinsic flame retardance is realized. A molecular structure of the cosolvent contains a plurality of high-activity groups such as hydroxyl groups, the cosolvent has excellent thermal stability and lasting flame-retardant efficiency, can be chemically bonded with a waterborne polyurethane matrix under a low-temperature condition, remarkably reduces the dosage of the cosolvent, and can realize zero VOC solvent emission when being applied to a chemical flame-retardant modification process of waterborne polyurethane. Meanwhile, the Schiff base group contained in the flame retardant endows the flame retardant with an extra antibacterial function, breeding of microorganisms on the surface and inside of the material can be inhibited after the flame retardant is combined with waterborne polyurethane, material degradation caused by microbial erosion is avoided, the service life of the material is prolonged, and the using effect of the material is improved.

The invention discloses a gel microneedle loaded with silver nanoparticles and a preparation method and application thereof.The extract nano-silver (AB-AgNPs) is prepared through a green synthesis strategy, a drug-loaded microneedle system is constructed based on carboxymethyl chitosan-vanillic aldehyde-polyvinyl alcohol (CMCS-Va-PVA) composite gel, the AB-AgNPs prepared through the technology are uniform in particle size and stable in dispersion, and the drug-loaded microneedle has the advantages that the drug-loaded microneedle is good in drug-loaded performance and good in drug-loaded performance; the crystal has a typical face-centered cubic crystal structure and metal state Ag0 characteristics; the gel microneedle has good mechanical strength and forming effect, the AB-AgNPs and the gel matrix are stably combined through hydrogen bonds, the chemical properties are kept unchanged, and the system has broad-spectrum efficient bacteriostatic activity and biocompatibility; an in-vitro experiment proves that the green synthesized gel microneedle loaded with the silver nanoparticles has a remarkable capability of promoting the healing of L929 cell tissues; a rat wound experiment proves that the gel microneedle can regulate and control an inflammatory factor network and promote cell migration and tissue regeneration, healing of common and infected wounds is remarkably accelerated, and the wound residue ratio in 9 days is as low as 2.7% and 10.9% respectively.

The invention relates to the technical field of agricultural biological prevention and control, and discloses a biological prevention and control complex microbial inoculant and application thereof.The biological prevention and control complex microbial inoculant is prepared by the steps that natural bio-based compounds vanillin and vanillic acid serve as main raw materials, and a biodegradable trialdehyde monomer is designed and synthesized; a biodegradable trialdehyde monomer and p-phenylenediamine are used as organic building units to assemble and form an ordered porous crystal structure, and the biodegradable COF material is obtained; the preparation method comprises the following steps: loading a basic complex microbial inoculant consisting of bacillus thuringiensis, bacillus subtilis and streptomyces willerigensis on a biodegradable COF material by adopting an impregnation adsorption method, and coating the surface of the biodegradable COF material with tetraethylenepentamine and tannic acid through copolymerization to form a degradable polytannic acid layer, so as to prepare the slow-release complex microbial inoculant, and the effective active components of the slow-release complex microbial inoculant can be slowly released; the lasting period and the utilization rate of the composite microbial agent can be remarkably improved, and the composite microbial agent shows an obvious inhibition effect on pathogenic bacteria such as fusarium oxysporum and botrytis cinerea and can be applied to prevention and treatment of plant diseases.

The invention discloses a degradable and recoverable epoxy Vitrimer as well as a preparation method and application thereof, and belongs to the technical field of functional materials and preparation thereof. The problems that existing epoxy resin is not melted and unrecyclable, and the mechanical property and breakdown field strength are seriously reduced after recycling are solved. According to the invention, 2-AFD is used as a curing agent of DGEBA, and a dynamic disulfide bond is introduced in the curing process of DGEBA, so that the epoxy resin is endowed with degradable and recoverable properties. DGEBA is used as a raw material, and vanillin-based epoxy resin (VOEP) with a reversible dynamic covalent bond (-C = N-) is further used for replacing a part of DGEBA, so that the epoxy resin realizes high-performance retention rate hot-pressing recovery, and meanwhile, the epoxy resin can be degraded in a mercaptan solution and can also be degraded in an n-hexylamine solution.

The invention provides emulsified asphalt, an emulsified asphalt cold recycled mixture and a preparation method thereof, and the emulsified asphalt comprises the following components in percentage by mass: 40%-55% of matrix asphalt, 5%-20% of a modifier, 10%-15% of an emulsifier and 25%-30% of water, the modifier is selected from any one of atactic polypropylene, terpene resin, epoxy resin, rubber resin and modified polyurethane prepolymer; the modified polyurethane prepolymer is obtained by modifying a polyurethane prepolymer through cashew nut shell liquid and vanillin. The cashew nut shell liquid and the vanillin are used for modifying the prepolymer, and a composite system with rigidity (benzene ring), flexibility (aliphatic chain) and a cross-linked network (polyurethane) is formed; the mechanical property, water damage resistance and the like of the prepared high-performance emulsified asphalt are greatly improved, the early-stage wear resistance, pavement performance and fatigue resistance of a cold recycled mixture can be remarkably improved, and the service life of a pavement is effectively prolonged.

The invention provides a vanillin compound spliced by polyheterocycles. The polyheterocycles are one of a benzimidazole ring, a thiadiazole ring, an oxadiazole ring and a thiazole ring; the vanillin compound spliced by polyheterocycles is one of vanillin derivatives containing a benzimidazole ring, a thiadiazole ring, an oxadiazole ring and a thiazole ring, and the chemical general formula is shown in the specification. The polyheterocycle spliced vanillin compound is prepared through a condensation reaction and a condensation-cyclization reaction, and the compound has good antibacterial activity on valsa mali, red kidney bean root rot, fusarium graminearum, millet pyricularia grisea, botrytis cinerea, alternaria solani and watermelon fusarium oxysporum. The compound can be used for preparing a novel efficient antibacterial agent and is applied to prevention and treatment of the pathogenic bacteria.

The present invention discloses a formula and brewing method for brewing a light-fragrance liquor using mung beans instead of peas. The present invention relates to the brewing field of white wine. The formula is composed of daqu and kaoliang, wherein the mass percentage of the kaoliang and daqu is 100:20-25. The daqu includes barley, peas, and mung beans. The daqu includes 58-65% barley, 30-35% peas, and 5-10% mung beans by mass, and the starch content of the kaoliang is ≥70%. The formula and brewing method of a light-fragrance liquor brewed using mung beans instead of peas of the present invention, by adding mung beans, while retaining the elegant and pure style of traditional light-fragrance liquor, give a more rounded and mellow taste experience. The unique plant fragrance of mung beans also produces exquisite flavor synergy with substances such as pea-derived vanillin, so that the finished wine presents the sensory characteristics of being clear but not light, mellow but not strong. By introducing mung bean raw materials, the dependence on high-priced peas can be effectively reduced, directly reducing the procurement cost of raw materials per ton of wine.

This invention belongs to the field of crop cultivation technology, specifically relating to a rice nano-flavor enhancer and its application in rice cultivation. The rice nano-flavor enhancer of this invention is prepared from raw materials such as sodium octenyl succinate starch, sodium ascorbate, and sodium selenite. The prepared octenyl succinate starch-nano-selenium has advantages such as small nanoparticle size and system stability. This flavor enhancer can not only significantly improve the overall aroma of fragrant rice, but also enhance the aroma of non-fragrant rice. Specifically, it can significantly increase the content of volatile aroma compounds such as 2-acetyl-1-pyrroline (2-AP) in fragrant rice grains, and significantly increase the content of volatile aroma compounds such as vanillin, benzaldehyde, and geranylacetone in non-fragrant rice grains. Unlike traditional rice flavor enhancers, the rice nano-flavor enhancer of this invention has better applicability and a wider range of applications, helping to meet the growing market demand for high-quality rice.

The invention belongs to the technical field of degradable and recyclable epoxy resin, and discloses degradable epoxy resin based on diimine bond vanillin as well as a preparation method and application of the degradable epoxy resin. The epoxy resin chain extender containing the biimine bond bio-based is prepared through a Schiff base reaction, the epoxy resin chain extender and epoxy resin are subjected to ring opening, finally, the epoxy resin chain extender and the curing agent containing amido are subjected to high-temperature curing, and the degradable and recyclable thermosetting epoxy resin and the degradable carbon fiber composite material which have excellent mechanical properties are prepared. The problem of recycling the thermosetting epoxy resin and the composite material is solved, sustainable utilization of resources is realized, and environmental pollution is reduced.

The present invention discloses a method for highly selectively extracting vanillin using an ionic liquid / salt / sulfonylated calix[4]arene aqueous two-phase system. n The extract containing vanillin is added to the aqueous two-phase system of mim]Br / Na3C6H5O7 / SC[4], mixed, centrifuged to separate the two phases completely, and the upper phase is collected to obtain the extracted vanillin. n mim]Br / Na3C6H5O7 aqueous two-phase system increases the polarity difference between the two phases, promotes the formation of the two-phase system, improves the distribution coefficient of vanillin in the two-phase system, and can highly selectively extract vanillin from a variety of structural analogs. The method is simple and easy.

The present invention discloses a mutant of a dioxygenase for biocatalytic synthesis of vanillin, a preparation method thereof and applications. The mutant is such that at least one of the 332nd, 401st, and 553rd positions in the amino acid sequence shown in SEQ ID NO.1 is mutated; by mutating the aromatic dioxygenase sequence of 4-vinylguaiacol and through screening, this series of mutants can efficiently catalyze the formation of vanillin from 4-vinylguaiacol, and it has a yield 5 to 7 times higher than that of the template.

This invention discloses a biomass-based aerogel for fruit cushioning packaging and its preparation method, belonging to the technical field of food packaging materials. The preparation steps are as follows: chitosan solution and gelatin solution are mixed, and vanillin is added to carry out a cross-linking reaction to obtain a cross-linked mixture; the cross-linked mixture is subjected to low-temperature pre-freezing treatment, followed by freeze-drying to obtain the biomass-based aerogel for fruit cushioning packaging. The aerogel preparation method provided by this invention is simple, the raw materials are natural and renewable, and the acquisition cost is low. The obtained aerogel possesses excellent mechanical properties and cushioning effect, which is of great significance for the cushioning and storage of fruits during transportation.