2611 results about "Lignin" patented technology

The invention discloses an application of soluble lignin as a synergist for ethanol fermentation and / or improvement of stress resistance of yeast under a fermentation environment stress condition, the soluble lignin is added into an ethanol fermentation system, and the problems of pH instability, oxidative damage, heavy metal inhibition and the like in ethanol fermentation can be synchronously solved; the survival rate of yeast and the yield of ethanol are remarkably improved, the process steps are simplified, the cost is reduced, the method is suitable for ethanol industrial production of agricultural and forestry wastes and other raw materials, and a green and practical technical path is provided for efficient utilization of all components of lignocellulose. In addition, the soluble lignin disclosed by the invention can also be recycled, can still keep a relatively high synergistic effect after being recycled for multiple times, and has a wide application prospect in the field of bioethanol fermentation.

The invention discloses a bionic lignin-based saline-alkali soil improvement material and a preparation method thereof, and belongs to the technical field of high polymer materials and soil improvement. According to the saline-alkali soil improving material, lignin or a derivative thereof serves as a framework, glutenin charge distribution and a dynamic disulfide bond sodium ion response function are simulated, and the sequence and the proportion of chain segments of sulfonic acid groups and quaternary ammonium salt groups are accurately regulated and controlled through step-by-step activation and alternate copolymerization in an aqueous solution polymerization reaction system; positive and negative charges form more uniform sequence distribution, so that the amphipathy of the lignin compound is realized; then, sulfydryl is introduced through click chemistry, linear regulation and control of material viscosity and water solubility are achieved through the chain transfer characteristic of multi-sulfydryl functional groups, and the requirements of different saline-alkali soil application scenes are met. The limitation that a traditional lignin product is single in function is broken through, efficient utilization of lignin is achieved, and the intelligent saline-alkali soil improvement material integrating high stability and pH and Na < + > multi-environment response is developed.

The invention discloses a biodegradable polylactic acid composite material and a preparation method thereof, and relates to the technical field of polylactic acid materials. The method comprises the steps that firstly, chitosan activated through hydrochloric acid is subjected to graft modification through a KH550 silane coupling agent, meanwhile, nano-zinc oxide is subjected to surface modification through stearic acid, the chitosan and the nano-zinc oxide are mixed, spray drying is conducted, and antibacterial composite powder is prepared; the preparation method comprises the following steps: performing hydrochloric acid activation and KH570 silane coupling agent modification on nano silicon dioxide, performing hydroxypropylation modification on alkali lignin, and performing reflux crosslinking reaction on the modified alkali lignin, KH570 modified nano silicon dioxide, polycaprolactone, methyl methacrylate and azodiisobutyronitrile to prepare a heat-resistant reinforcer; uniformly mixing polylactic acid, poly (butylene succinate), the antibacterial composite powder, the heat-resistant reinforcer, tributyl citrate, polyethylene glycol and talcum powder, and extruding and granulating by using a twin-screw extruder to obtain the heat-resistant antibacterial material. The composite material prepared by the invention has excellent antibacterial property, heat resistance and biodegradability.

The invention relates to the technical field of sodium ion batteries, in particular to a preparation method and application of a closed-cell hard carbon material constructed based on a multi-benzene-ring plane structure. Comprising the following steps: (1) crosslinking lignin powder to obtain a macromolecular lignin precursor; (2) placing the macromolecular lignin precursor in the step (1) in an inert atmosphere furnace for first calcination to obtain hard carbon powder with a multi-benzene-ring plane porous structure; and (3) placing the hard carbon powder obtained in the step (2) in an inert atmosphere furnace for secondary calcination to obtain the closed-cell hard carbon material. According to the preparation method, lignin molecules are synergistically regulated through crosslinking-calcination to form a multi-benzene-ring plane structure, and then a high-closed-pore structure is constructed through graded calcination, so that the electrochemical performance of the lignin in the sodium-ion battery can be remarkably improved, the reversible capacity of 340 mAh / g and 500-circle stable circulation are obtained, and high-value utilization of the biomass material lignin is realized.

This disclosure relates to the fabrication of high-performance thin film composite (TFC) reverse osmosis (RO) membranes comprising a thin polyamide rejection layer (thickness of 100-200 nanometer), a porous substrate including polysulfone (PSf) layer (thickness of 40-50 micron) cast on polyester nonwoven fabric (thickness of ˜100 micron). Hydrophilic and antibacterial TFC polyamide RO membranes were developed by incorporating green Lignin and nanostructured silver-based metal organic frameworks (MOFs) into the selective layer. The polyamide layer of TFC RO membranes was fabricated on the porous PSf substrate by interfacial polymerization between aqueous monomer solutions containing MPD, and adequate additives in water and organic monomer solutions containing TMC in the mixture of hexane and co-solvents. The optimized produced RO membranes were provided water flux of 95-100 LMH and sodium chloride (NaCl) salt rejection of 98.5-99.0% during filtration of 2000 ppm NaCl solution at 225 psi pressure, and water flux of 55-60 LMH and sodium chloride (NaCl) salt rejection of 98.6-98.9% during filtration of 35000 ppm NaCl solution at 800 psi pressure. This disclosure also relates to developing a roll-to-roll PSf membrane as a substrate for making TFC RO membranes for water desalination

The invention relates to the technical field of gypsum fiberboard raw material treatment, in particular to a plant fiber for a gypsum fiberboard and a preparation method and application thereof. Compared with the prior art, the preparation method provided by the invention adopts specific process steps, plant fiber raw materials are softened by using a supersaturated calcium hydroxide solution to partially remove lignin, the treated plant fiber slurry is introduced into a sulfuric acid solution for neutralization in the water washing process, and generated nano-scale calcium sulfate particles are attached to the surfaces of the plant fibers, so that the surface of the plant fibers is uniform. The plant fiber coagulant plays a role of a coagulant during production of the gypsum fiberboard, and the plant fiber meeting the requirements of production of the gypsum fiberboard is prepared. The preparation method provided by the invention is low in cost, and the gypsum fiberboard prepared from the obtained plant fiber for the gypsum fiberboard has relatively high mechanical property indexes and meets the performance requirements of boards for building decoration.

The invention discloses a crosslinked polyethylene low-smoke halogen-free flame-retardant power cable which comprises the following hierarchical structures: a conductor layer; an insulating layer; a shielding layer; the shielding layer takes polyethylene as a matrix and comprises the following components in parts by weight: 70-78 parts of matrix, 20-25 parts of carbon black and 2-5 parts of nano montmorillonite modified lignin, the thickness of the shielding layer is 0.8-1.2 mm, the shielding layer and the insulating layer are molded through a co-extrusion process, and the interface gap is less than or equal to 0.1 mm. The nano montmorillonite modified lignin is adopted as a core flame retardant, the addition amount is reduced by 10%-15% compared with that of a traditional halogen-free flame retardant, by taking a 120 mm civil cable as an example, 18 parts of modified lignin replace 25 parts of a traditional flame retardant with the same flame retardant effect, the raw material cost is reduced by 8%-12%, lignin is derived from agricultural and forestry wastes, dependence on a petroleum-based material is reduced, and the environment-friendly flame-retardant cable material is suitable for industrial production. The gradient cooling process shortens the cooling time by 20%-30% compared with the traditional single-section cold water cooling process, and meanwhile, the pre-crosslinking process reduces the subsequent forming internal stress and reduces the rejection rate.

The invention provides Aspergillus tubingensis HNZY02, a method for producing enzymes by the Aspergillus tubingensis HNZY02 and application of the Aspergillus tubingensis HNZY02, and belongs to the technical field of microorganisms, the Aspergillus tubingensis HNZY02 is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation number is CGMCC No.42148. The aspergillus tubingensis HNZY02 shows excellent cellulase and xylanase synthesis capability, can synergistically and efficiently degrade main structural components such as cellulose, hemicellulose and lignin in tobacco stems, and improves the safety and application value of cigarettes while breaking the compact structure and increasing the reducing sugar content.

The present invention relates to a lid film for airtight sealing of beverage capsules, in particular coffee capsules, comprising excellent barrier properties against gas ingress, water or humidity and oxygen: i.) at least one layer of paper, ii.) at least one layer containing polylactic acid, iii.) at least one layer of metallization, iv.) at least one sealing layer containing at least one thermoplastic polymer made from glucose, lignin or cellulose.

The invention relates to the technical field of environment-friendly high polymer materials, in particular to an environment-friendly furniture protective film and a preparation method thereof. The technical problems that a traditional furniture protection film is insufficient in toughness and short in service life are solved. According to the protective film disclosed by the invention, a polylactic acid, polyhydroxyalkanoate and dimer fatty acid ester flexibilizer blending material is taken as a matrix, a cyanoethylation lignin-cellulose nanocrystal compound reinforcing agent is added to form a dense nano network, and a dynamic cross-linking agent containing disulfide bonds and a functional auxiliary agent are introduced. According to the invention, a solvent-free ultraviolet light / damp and hot dual-curing system is adopted for coating and curing to prepare the coating. The furniture protection film is excellent in mechanical property, toughness is remarkably improved, and the furniture protection film has multiple functions such as high barrier property and the like and has the self-repairing capacity and the full-life-cycle environment-friendly characteristic.

The invention relates to the technical field of cables, and provides a medium-voltage power cable and a manufacturing method thereof.The medium-voltage power cable sequentially comprises a conductor, a conductor shielding layer, an insulating layer, an insulating shielding layer, a metal shielding layer, a lining layer, an armor layer and a sheath layer from inside to outside; the sheath layer comprises the following raw material components in parts by weight: 100 parts of polyvinyl chloride, 20-25 parts of a flame retardant, 30-40 parts of a plasticizer, 1-3 parts of an antioxidant and 20-25 parts of an inorganic composite material; the inorganic composite material is obtained by treating white carbon black with lignin and polyethylene glycol dimethacrylate, crushing and carbonizing. According to the technical scheme, the problem that the low temperature resistance of the medium-voltage power cable sheath layer is insufficient in the prior art is solved.

The invention discloses a composite curcumin nano pesticide and a preparation method and application thereof.The nano pesticide comprises a carrier and curcumin loaded on the carrier, the carrier is polydopamine-sodium lignin sulfonate, and the polydopamine-sodium lignin sulfonate is formed by polymerizing dopamine hydrochloride on the surface of lignin; the preparation method comprises the following steps: preparing a curcumin solution, adding the polydopamine-sodium lignin sulfonate powder, fully dispersing, slowly stirring under a dark condition until a yellow solution becomes dark red, and removing a solvent to obtain the polydopamine-sodium lignin sulfonate-curcumin. The nano pesticide provided by the invention takes polydopamine-sodium lignin sulfonate as a carrier, so that the drug has pH and photo-thermal response controlled release function, burst release of curcumin is avoided, and the stability and bioavailability of curcumin are improved.

This invention belongs to the field of high-value utilization technology of biomass resources, and discloses a method for catalyzing the depolymerization of lignin into phenolic compounds using a RuNiZn / Nb2O5 catalyst. The method includes: uniformly mixing the RuNiZn / Nb2O5 catalyst, lignin-containing biomass feedstock, and water; stirring under hydrogen atmosphere to carry out the depolymerization reaction; after the reaction, cooling to room temperature and performing solid-liquid separation; evaporating the solvent to obtain the hydrogenated depolymerization product containing monophenols. In this invention, the RuNiZn / Nb2O5 catalyst employs a technique of replacing precious metals with various non-precious metals, which improves the catalyst's reactivity and reduces the amount of precious metals used. This increases the yield of lignin depolymerization products, provides milder depolymerization reaction conditions, and ultimately significantly reduces the catalyst preparation cost and the energy cost of the lignin depolymerization process.

The invention discloses a preparation method of a composite slow-release carbon source, which comprises the following steps: preparing an inner core: uniformly dry-mixing lignin powder and a quick-acting carbon source, and adding a first binder to prepare inner core particles; middle layer wrapping: alternately spraying a second binder and middle layer coating powder until the middle layer is completely wrapped to obtain double-layer particles; outer layer wrapping: alternately spraying a third binder and outer layer coating powder until the outer layer is completely wrapped to obtain three layers of particles; and spraying a biodegradable polymer solution on the surfaces of the three layers of particles to form a coating film. Through the three-layer structural design of the quick start layer, the stable maintenance layer and the long-acting guarantee layer, accurate matching of carbon source release and microbial metabolism requirements is realized. The outer-layer quick-acting carbon source quickly starts microbial activity, the middle layer provides stable and continuous carbon source supply, and the inner core ensures the tail-section treatment effect. The sequential release mechanism effectively avoids burst release waste of the carbon source, so that the utilization rate of the carbon source is greatly improved.

The invention discloses a lignin-based epoxy anticorrosive paint and a preparation method thereof. The anticorrosive paint is prepared by mixing a lignin-based epoxy anticorrosive paint component, a lignin-based phenolic amine curing agent and a diluent. According to the lignin-based epoxy anticorrosive paint disclosed by the invention, on one hand, a lignin epoxy resin acetylation modification method based on lipase is introduced, and the content of hydrophilic groups is reduced, so that formation of a compact lignin cross-linked network structure is promoted, and the barrier ability, heat resistance and aging resistance of an anticorrosive coating on a chemical medium are improved on the resin level; on the other hand, lignin and furfural are respectively used for partially replacing phenol and paraformaldehyde to prepare a lignin-based phenolic aldehyde amine curing agent with high chemical inertness, so that the protection effect of a coating in an extreme corrosion environment and the adhesive force to a metal base material are improved on the curing agent level. The lignin-based epoxy anticorrosive paint prepared by the invention has good corrosion resistance, aging resistance, thixotropy and adhesive force.

The invention belongs to the field of microorganisms, and particularly relates to bacillus Z161 capable of efficiently degrading straw as well as a screening method and application of the bacillus Z161. The bacillus subtilis Z161 is bacillus mexicanus, the preservation number of the bacillus mexicanus Z161 is CGMCC (China General Microbiological Culture Collection Center) NO.36393, and the bacillus mexicanus Z161 is preserved in the China General Microbiological Culture Collection Center on October 29, 2025. The bacillus Z161 screened by the invention has strong laccase activity and high temperature resistance, and can efficiently degrade lignin under the condition of 50 DEG C; the problem that in the prior art, normal-temperature zymophyte is mostly adopted, and the requirement for fermentation conditions in the fermentation process is harsh is solved, and therefore the rapid compost fermentation technology is easier to achieve. The bacillus Z161 provided by the invention has the advantages of genetic and functional character stability, has good tolerance at high temperature, enables lignin to be quickly depolymerized, and improves the decomposition efficiency.

The invention provides a free radical excited cross-linked composite hard carbon material as well as a preparation method and application thereof, and relates to the technical field of negative electrode materials. The composite hard carbon material is prepared from lignin and asphaltene as raw materials through lignin activation, wet ball milling, drying and calcination. Through the preparation method of free radical pre-excitation-wet ball-milling crosslinking, collaborative optimization of the sodium storage capacity, the first-week coulombic efficiency, the cycling stability and the rate capability of the composite hard carbon material is realized. Moreover, the preparation process of the composite hard carbon material provided by the invention has the advantages of good process stability, strong controllability, low cost, environmental friendliness and the like, is easy for large-scale production, meets the technical index requirements of industrial application of sodium ion batteries, and has a wide market application prospect.

The invention relates to the technical field of plant extraction, in particular to a multi-product preparation method based on an arabinoxylan-lignin compound. The method comprises the following steps: treating a lignocellulose raw material by adopting a weak base extracting solution and a strong base extracting solution, and separating an obtained strong base extracting and dealkalizing suspension into an arabinoxylan-lignin compound dispersion liquid and arabinoxylan; performing enzymolysis on the dispersion liquid, and filtering enzymatic hydrolysate to obtain a precipitate which is lignin and a filtrate which is xylooligosaccharide liquid; and separating and purifying the xylooligosaccharide liquid to obtain xylooligosaccharide, xylose and arabinose. According to the method, on the basis of a weak base-strong base two-step extraction process, obtained arabinoxylan-lignin compound dispersion liquid is subjected to enzymolysis, so that lignin, xylooligosaccharide, xylose and arabinose can be continuously prepared, and the reutilization of the arabinoxylan-lignin compound is realized.

The invention provides a microbial agent capable of degrading lignin and application of the microbial agent in regulation and control of a soil organic carbon library, and relates to the technical field of microorganisms, the microbial agent contains at least two of serratia marcescens, ochrobactrum anthropi, pseudomonas asparagi or burkholderia terricola, and the microbial agent contains at least two of the serratia marcescens, the ochrobactrum anthropi, the pseudomonas asparagi and the burkholderia terricola. The serratia marcescens a26, the ochrobactrum anthropi b1, the pseudomonas asparagi b6 or the burkholderia terricola b21 have good lignin degradation capability, after compounding, the lignin degradation capability of the strain is further improved, and the strain can be used for degrading moso bamboo litters with high lignin content and promoting accumulation of a soil organic carbon library. The technical problem that a microbial agent with a function of efficiently degrading lignin is lacked in the prior art is solved.

The invention discloses a PEM proton exchange membrane for water electrolysis and a preparation method thereof, and relates to the technical field of water electrolysis. The proton exchange membrane is composed of five layers of structures including a modified sulfonated composite resin layer, an enhancement layer, a water retention layer, a catalyst layer and an anti-permeation layer, the preparation method comprises the following steps: the modified sulfonated composite resin layer is prepared by dispersing perfluorinated sulfonic acid resin and sulfonated lignin in a solvent, coating and drying; the reinforcing layer is prepared by blending a PTFE (Polytetrafluoroethylene) emulsion, a carbon nanotube and a tetrafluoroethylene-hexafluoropropylene copolymer, and then carrying out casting sintering, plasma treatment and hot press molding; the water retention layer is prepared by adopting an electrostatic spinning technology; the catalyst layer is formed by spraying a precursor solution step by step and drying; the anti-permeation layer is prepared through photoetching-etching array construction, resin coating and fluorosilane modification. The prepared proton exchange membrane has excellent mechanical strength, proton conductivity and stability, and is suitable for the field of PEM water electrolysis.

A method for improving degradation efficiency of corn straw at low temperature comprises the steps that cell-free culture fluid PfCFs prepared from Pseudomonas fragi D12 participates in fermentation and degradation of the corn straw, the classification name of the strain D12 is Pseudomonas fragi D12, the strain D12 is preserved in China Center for Type Culture Collection, the preservation address is No. 299, 8th road, Wuchang District, Wuhan City, Hubei Province, China, and the preservation number is CGMCC NO. The preservation number is CCTCC (China Center For Type Culture Collection) NO: M2025126, and the preservation date is January 14, 2025. The acellular culture solution of the pseudomonas rubrassicae D12 can promote the growth of various normal-temperature bacteria and fungi functional bacteria at low temperature and improve the cold resistance of the functional bacteria, and CFS of the pseudomonas rubrassicae D12 also contains related enzymes capable of degrading lignin; at a low temperature, the PfCFs synchronously promotes the co-growth of bacteria bacillus subtilis and fungi Irpex lacteus, so that the degradation efficiency of the functional bacteria on lignocellulose in the corn straws is improved.

The preparation method comprises the following steps: shredding a light fibrous plant raw material which is difficult to process to 1-5mm, adding a certain amount of lignin, fully mixing with diammonium hydrogen phosphate or ammonium dihydrogen phosphate, carrying out hot press molding at 130-190 DEG C by using a pelletizer to prepare heavy particles with the particle size of 8-10mm, and carrying out high-temperature sintering to obtain the columnar activated carbon for desulfurization and denitrification of the fibrous plant raw material, thereby obtaining the columnar activated carbon for desulfurization and denitrification of the fibrous plant raw material and the columnar activated carbon for desulfurization and denitrification of the fibrous plant raw material. Heating the heavy particles to 400-700 DEG C in a rotary furnace, carbonizing for 1-3 hours, introducing a mixed gas of water vapor and air, and carrying out segmented activation at 850-950 DEG C-1000 DEG C to prepare high-quality activated carbon with the iodine value of more than or equal to 950 mg / g; crushing activated carbon to 140-325 meshes, mixing the crushed activated carbon with the composite glue solution, adding a proper amount of water for kneading, and forming the mixture into 2-8mm columnar particles by a hydraulic granulator or a screw extrusion granulator; through drying at the temperature of 100-300 DEG C and heat treatment at the temperature of 700-900 DEG C in a nitrogen, water vapor or anaerobic atmosphere, a basic group generated by the binder in the heat treatment has a very strong chemical adsorption effect on acid gas, later-stage modification is not needed, and excellent desulfurization and denitrification performance is achieved.

The invention discloses a high-barrier degradable vegetable and fruit preservative film based on multi-layer compounding and a preparation method thereof, belongs to the technical field of food packaging materials, and aims to solve the technical problem that the barrier property, the mechanical property and the antibacterial property of the degradable vegetable and fruit preservative film in the prior art need to be further improved. The degradable vegetable and fruit preservative film comprises a first layer, a second layer and a third layer which are sequentially laminated, and the first layer is prepared from, by weight, 65-75 parts of polylactic acid, 4-8 parts of maleic anhydride grafted polylactic acid, 2-4 parts of modified carbon nitride, 1-3 parts of alizarin microcapsules, 3-6 parts of modified lignin and 1-2 parts of auxiliary additives; through the synergistic effect of the modified carbon nitride, the alizarin microcapsules and the modified lignin, the barrier property, the mechanical property and the antibacterial property of the degradable vegetable and fruit preservative film are further improved.

The invention relates to the technical field of coal washing wastewater treatment, in particular to a lignin branched modified coal washing flocculant and a preparation method thereof. The preparation method of the lignin branched modified coal washing flocculant provided by the embodiment of the invention comprises the following steps: S1, carrying out enzymatic degradation treatment on lignin to obtain pretreated lignin powder; s2, carrying out epoxy group activation pretreatment on the pretreated lignin powder to obtain epoxy group lignin; s3, performing sulfydryl pretreatment on the epoxy lignin to obtain sulfydryl-containing sulfydryl grafted modified lignin; and S4, carrying out branched copolymerization on the sulfhydrylation grafting modified lignin and a cationic monomer to obtain the lignin branched modified coal washing flocculant. The embodiment of the invention provides the lignin branching modified coal washing flocculant, and the lignin branching modified coal washing flocculant which is low in consumption, efficient and environment-friendly can be provided.

This invention belongs to the technical field of cable sheath materials, specifically disclosing a waterproof and corrosion-resistant cable sheath material and its preparation method. The waterproof and corrosion-resistant cable sheath material comprises the following raw materials in parts by weight: 40-60 parts polyethylene, 15-20 parts acrylate rubber, 10-20 parts plasticizer, 10-15 parts compatibilizer, 3-5 parts lubricant, 1-5 parts antioxidant, 2-10 parts flame retardant, 5-10 parts modified carbon nanotubes, and 3-5 parts lignin derivatives. The addition of modified carbon nanotubes and lignin derivatives not only helps improve the mechanical properties of the cable sheath material but also endows it with excellent waterproof and corrosion-resistant capabilities.

The invention relates to the technical field of rubber materials, in particular to a wear-resistant non-slip rubber outsole material and a preparation method of the wear-resistant non-slip rubber outsole material. The rubber material is prepared from the following components in parts by mass: 10 to 40 parts of natural rubber, 10 to 20 parts of epoxidized natural rubber, 40 to 80 parts of itaconate rubber, 10 to 60 parts of rice husk white carbon black, 5 to 20 parts of lignin, 5 to 20 parts of cellulose filler, 1 to 6 parts of coupling agent, 1 to 6 parts of dispersing agent, 0.5 to 2 parts of paraffin, 1 to 5 parts of resin, 1 to 3 parts of antioxidant, 1 to 5 parts of active agent, 0.5 to 2 parts of stearic acid, 1 to 3 parts of accelerant and 1 to 3 parts of sulfur. According to the invention, a bio-based rubber material is used as a matrix, various reinforcing fillers and processing aids from bio-based sources are used, the mechanical strength, wear resistance and slip resistance of the material are improved through a modified composite technology, and a material support is provided for green and sustainable development of shoe materials.

The invention discloses a sorghum brown midrib mutant gene bmr34 related to high digestibility and application of the sorghum brown midrib mutant gene bmr34. The haplotype of the mutant gene bmr34 can specifically reduce the lignin content by 2.99% without affecting the biological yield. The invention provides the KASP marker which can accurately locate the bmr34 gene of sorghum and is closely linked with the bmr34 gene of sorghum, so that the breeding efficiency can be greatly improved, the breeding process is accelerated, and the KASP marker has important theoretical and practical significance for improving the quality of sorghum feed.

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 belongs to the field of catalysts, and discloses a catalytic material based on lignin derivation and a preparation method and application thereof. The catalytic material is prepared from lignin derived carbon and NiFe LDH; the lignin derived carbon is inserted into the interlayer of the NiFe LDH and is coated on the surface of the NiFe LDH. The preparation method comprises the following steps: S1, dissolving a lignin derivative in water to obtain a first solution; s2, dissolving metal salt in water to obtain a second solution, wherein the metal salt comprises ferric salt and nickel salt; s3, mixing the first solution and the second solution, and adjusting the pH value to obtain a mixed solution; and S4, immersing the conductive current collector into the mixed solution for hydrothermal reaction, taking out the conductive current collector after the reaction is finished, and treating the conductive current collector to obtain the catalytic material. The obtained catalytic material is used for an anode oxygen evolution reaction in an electrolytic seawater environment, and has high activity, high stability and good chlorine corrosion resistance.