50 results about "Renewable biomass" patented technology

The invention belongs to the technical field of adhesives, and particularly relates to a preparation method of a polysaccharide-based reversible bonding adhesive for constructing a dynamic covalent bond network. The preparation method comprises the following steps: by taking lipoic acid and sodium alginate as reactants and ferric chloride as a cross-linking agent, carrying out cross-linking reaction under a stirring condition to obtain a lipoic acid adhesive, namely the polysaccharide-based reversible bonding adhesive. According to the invention, renewable biomass resources such as sodium alginate, hyaluronic acid, chitosan and the like are used as main raw materials, so that the adhesive is expected to replace a traditional synthetic adhesive depending on a petroleum base, accords with a sustainable development strategy, contributes to reducing consumption of fossil resources, avoids release of toxic substances such as formaldehyde and the like in the synthesis and use processes, and has a good application prospect. And the method is more environment-friendly. The bio-based polysaccharide raw material has good biocompatibility and degradability, and an ideal base material is provided for developing a green and safe biomedical adhesive.

The present invention relates to a dental diaphragm copolyester and a preparation method thereof, the preparation method comprises the following steps: 2, 5-furandicarboxylic acid or an ester thereof, aliphatic or alicyclic diol and (2-hydroxy-5-formyl phenyl) diphenylborane are subjected to a reaction to obtain an esterification or ester exchange product; and carrying out condensation polymerization on the esterification or ester exchange product and the stabilizer to prepare the copolyester for the dental diaphragm. 2, 5-furandicarboxylic acid is derived from a renewable biomass resource and meets the requirements of green and sustainable development; compared with terephthalic acid and furan ring structures, the film has higher rigidity and polarity, the yield of hot press molding is improved, the same correction force can be met by a thinner film, the wearing comfort of a patient is improved, and meanwhile stress relaxation is improved; the catalyst perfectly combines strong Lewis acidity, intramolecular stabilization and potential bifunctional activation through structural design, provides possibility for efficient and green synthesis of polyester, avoids use of heavy metal, and is higher in biological safety.

The invention discloses a preparation method and application of a double-biomass carbon source coated ammonium polyphosphate intumescent flame retardant with a core-shell structure. Ammonium polyphosphate is used as a core, composite coating of chitosan and zinc stannate is achieved through an ion exchange reaction and a chelation reaction, then a lignin shell layer is introduced through a Mannich reaction, and the lignin and chitosan double-carbon-source coated intumescent flame-retardant antibacterial synergist is obtained. The flame retardant disclosed by the invention is simple and convenient in preparation process and high in safety, most of the raw materials are derived from green renewable biomass materials with low cost, and the flame retardant has environment-friendly characteristic and excellent polymer compatibility. The microcapsule surface modification technology enhances the interfacial interaction between the additive and the polymer matrix, systematic optimization of the flame retardant property of the composite material is realized, and when the flame retardant is used for modifying the TPU material, the molten drop phenomenon and a large amount of dense smoke generated in the combustion process can be effectively inhibited, and the TPU composite material can be endowed with excellent long-acting antibacterial property.

The invention discloses a degradable bio-based polyurethane wood protective coating. The coating comprises the following components: 40-60 parts of modified bio-based polyester polyol, 10-20 parts of a cross-linking agent, 3-8 parts of an antibacterial agent, 1-3 parts of a weather-resistant agent, 2-5 parts of a hydrolysis stabilizer, 20-30 parts of a solvent, 1-3 parts of a coupling agent, 0.5-1.5 parts of a leveling agent and 0.5-1.5 parts of a defoaming agent. The preparation method of the degradable bio-based polyurethane wood protective coating comprises the following steps: firstly, esterifying binary acid, dihydric alcohol and renewable biomass resources to prepare bio-based polyester polyol, then modifying the bio-based polyester polyol by using a hydrophobic modifier, finally mixing and dispersing the bio-based polyester polyol with other auxiliaries uniformly, and curing to obtain the degradable bio-based polyurethane wood protective coating. The coating has a static water contact angle of 113 degrees at most after being coated, the QUV aging life reaches 480 h, the antibacterial rate reaches 90% at most, the 90-day compost degradation weight loss rate reaches 60% at most, and the coating is environmentally friendly, low in VOC emission and suitable for efficient and durable protection of wood. The invention also provides an application of the degradable bio-based polyurethane wood protective coating.

The invention discloses a boron-phosphorus synergistic starch-based single-component intumescent flame retardant as well as a preparation method and application thereof. Starch, phytic acid, boric acid, allantoin and the like are used as raw materials, and the boron-phosphorus synergistic starch-based single-component intumescent flame retardant integrating an acid source, a carbon source and a gas source is designed and prepared. The flame retardant provided by the invention is simple and convenient in preparation process and high in safety, most of the raw materials of the flame retardant are derived from green renewable biomass materials with low cost, and the flame retardant has environment-friendly characteristic and excellent polymer compatibility. The synergistic effect of the phytic acid boron component in a flame-retardant system can be fully exerted by regulating and controlling the ratio of boron to phosphorus, when the flame retardant is applied to a polylactic acid (PLA) material, the influence on the mechanical property of the PLA is small, the PLA can be endowed with excellent flame retardance, the molten drop phenomenon and a large amount of dense smoke in the combustion process of the PLA can be effectively inhibited, and the biodegradation speed of the PLA can be increased.

The invention relates to the technical field of phenolic resin, in particular to dialdehyde cellulose-based phenolic resin and a preparation method thereof. The dialdehyde cellulose-based phenolic resin is prepared from dialdehyde cellulose, phenol, formaldehyde and a basic catalyst. According to the invention, the dialdehyde cellulose prepared from renewable biomass resource cellulose is used for replacing part of formaldehyde to prepare the dialdehyde cellulose-based phenolic resin, so that the use amount of formaldehyde can be reduced by 20%, and the production cost and material toxicity of the phenolic resin are reduced. Meanwhile, the dialdehyde cellulose-based phenolic resin prepared by the method disclosed by the invention has excellent bonding performance and thermal stability. Technical support is provided for solving the problems that biomass components are difficult to utilize, phenolic resin raw materials excessively depend on non-renewable resources, the bonding performance is not ideal and the like, and great application and popularization value is achieved.

The invention discloses a method for preparing 2, 5-furandicarboxaldehyde based on photocatalytic oxidation of BiVO4 / Cs2AgBiBr6 with a wavelength of 440 to 450 nm. The specific method comprises the following steps: preparing a perovskite photocatalytic material BiVO4 / Cs2AgBiBr6; the prepared BiVO4 / Cs2AgBiBr6 is added into a 5-hydroxymethylfurfural (HMF) anhydrous acetonitrile solution, and a photocatalytic oxidation experiment is carried out under the condition of an LED lamp with the wavelength of 440-450 nm. According to the technical process, HMF can be efficiently converted to synthesize 2, 5-furandicarboxaldehyde (DFF), reaction conditions are mild, operation is easy, the method is a cheap and efficient DFF preparation method, reference is provided for renewable biomass resource conversion, and the method has important significance on development of novel renewable energy sources.

The application belongs to the technical field of polymer material additives, and particularly relates to an anti-photooxidation nano material, a preparation method and application thereof. The anti-photooxidation nano material provided by the application comprises a core, a mesoporous silica intermediate layer wrapping the core, and a long-alkyl-chain hydrophobic modified outer layer grafted on the outer surface of the silica intermediate layer. The core is a nanoparticle formed by self-assembly of biomass polyphenol. The biomass polyphenol in the anti-photooxidation nano material provided by the application is not prone to migration, can exist stably in a plastic matrix for a long time, and the core functional material is derived from natural and renewable biomass polyphenol, thereby avoiding the use of traditional petroleum-based chemicals, and being non-toxic and good in biocompatibility.

The invention discloses a method for rapidly preparing a renewable biomass filter material through banana tree residue microwave plasma modification, and belongs to the field of solid waste recycling and environmental functional materials. The method comprises the following process steps: (1) carrying out sorting and impurity removal, cutting and crushing, drying and dehydration, fine crushing and screening on banana tree residues to obtain homogenized powder; soaking and activating the powder and a caustic soda aqueous solution at normal temperature to obtain a wet material; (2) mixing the banana tree residue powder with a caustic soda aqueous solution, and soaking and activating at normal temperature to obtain a wet material; and (3) placing the wet material in microwave plasma equipment for rapid modification, and carrying out solid-liquid separation, washing, compression molding and low-temperature drying to obtain the blocky renewable biomass filter material. The biomass filter material has high porosity, high mechanical strength and renewability, the preparation method of the biomass filter material is energy-saving and environment-friendly, the biomass filter material is expected to be applied to the field of sewage treatment, and large-scale value-added utilization of banana tree residues is achieved.

The invention discloses a chitin carbon-based metal-loaded self-supporting electrode as well as a preparation method and application thereof, and belongs to the technical field of carbon material catalysts. According to the preparation method, rich renewable biomass resources are used for synthesizing a new material, the carbon precursor is rich, cheap and easy to obtain, the modifiability of the carbon substrate is high, the metal load variety is wide, and the system compatibility is good; the scheme has the advantages of simple steps, wide raw material sources, environmental protection and economy, and is beneficial to sustainable development and circular economy. The chitin carbon-based metal-loaded self-supporting electrode prepared by the invention has strong electrochemical corrosion resistance, can promote the action of an electrochemical mediator, and has the advantages of good conductivity, strength, modifiability, uniformity, universality, activity, stability and the like in an organic solvent system; good catalytic activity is shown in water electrolysis and organic electrosynthesis, and a new way is provided for exploring a new reaction or organic electrosynthesis.

This invention relates to functional polymer composite materials, the utilization of renewable biomass polymer resources, and the field of thermal management technology for new energy vehicle batteries. Specifically, it relates to an environmentally friendly insulating and thermally conductive material for new energy batteries and its preparation method. The aim is to solve the inherent contradiction between thermal conductivity and insulation, and the conflict between high thermal conductivity requirements and lightweight and flexibility requirements. The material of this invention is formed by mixing and cross-linking components A and B. Component A mainly includes: castor oil-based polyurethane prepolymer with UPy quadruple hydrogen bond units in its side chains, porous boron nitride microspheres modified with polydopamine coating, modified cellulose nanocrystals containing methacrylate reactive groups, and a reactive flame retardant; Component B mainly includes: a bio-based polyol crosslinking agent, modified porous boron nitride microspheres, modified cellulose nanocrystals, and a melamine polyphosphate synergistic flame retardant.

The invention discloses a preparation method of a eucommia bark-based natural wood-plastic composite material. The method comprises the following steps: (1) taking eucommia ulmoides bark as a raw material, and performing mechanical treatment to obtain chippings; (2) partially removing hemicelluloses and lignin by adopting chemical treatment, so that the gutta-percha is fully exposed; (3) performing epoxidation modification on the eucommia ulmoides bark scraps obtained in the step (2); and (4) carrying out hot-pressing treatment on the epoxidized modified eucommia ulmoides bark chippings obtained in the step (3) to realize self-bonding so as to form the natural wood-plastic composite material with a compact structure. The eucommia ulmoides bark-based natural wood-plastic composite material provided by the invention has excellent mechanical property, waterproof property and biodegradability, can realize good cyclic utilization and biodegradation, and is expected to be applied to the fields of packaging and construction. According to the preparation method, renewable biomass resources are used as raw materials, the process is simple, the production cost is low, environmental pollution is small, and a new way is provided for development of the high-performance natural wood-plastic composite material.

The utility model discloses a combustion furnace with an automatic feeding function, which comprises a furnace body, and a feeding port is arranged on one side of the furnace body. Through the cooperation of the quantitative frame, the material collecting box, the feeding hopper and the double-roller type pulverizator, renewable biomass fuel can be pulverized in advance, so that the contact area of the renewable biomass fuel and oxygen during combustion can be increased, the renewable biomass fuel can be fully combusted, and then through the cooperation of the servo motor, the quantitative rollers and the quantitative groove, the biomass fuel can be fully combusted. According to the feeding device for the renewable biomass fuel, the crushed renewable biomass fuel can be quantitatively discharged, a certain gap is formed in each time of discharging, and therefore the safety of discharging can be further improved, and finally through cooperation of a feeding port, a transition channel, a transmission channel, a transmission motor and a spiral blade, the discharging efficiency is improved. And renewable biomass fuel can be stably conveyed into the furnace body to be combusted, so that the effects of automatic feeding of the furnace body and high feeding safety can be achieved.

The invention discloses a preparation method of a renewable biomass-derived efficient optical / electric super-hydrophobic coating, and belongs to the field of preparation of anti-icing coatings. The invention aims to solve the problems that the traditional anti-icing material is high in cost, low in photo-thermal efficiency and easy to pollute the environment. The method comprises the steps of 1, pretreatment; 2, preparing a composite coating solution; and 3, coating and curing. Lignin molecules extracted from coffee grounds enhance the hydrophobicity and wear resistance of the coating, lignin can enhance the binding force inside the coating and between the coating and a substrate, falling of the coating is prevented, and the service life of the coating is prolonged; furthermore, lignin molecules have a complex three-dimensional network structure, so that a micron-scale or nano-scale coarse structure can be formed on the surface of the coating, and the super-hydrophobic performance of the surface of the coating is improved; according to the invention, an electric heating, photo-thermal and super-hydrophobic triple anti-icing and deicing method is adopted, and rapid anti-icing / deicing in cold weather is realized through the action of an external electric field, solar energy or self gravity of water drops.

The application discloses a method for preparing DFF by oxidizing HMF based on IMo6-ZnIn2S4 / NiTiO3, and specifically comprises the following steps: first, preparing ZnIn2S4 / NiTiO3 metal sulfide IMo6-ZnIn2S4 / NiTiO3 loaded with heteropoly acid Na5IMo6O 24 ; and second, adding the IMo6-ZnIn2S4 / NiTiO3 into a HMF solution and performing a photocatalytic oxidation experiment under the condition of visible light with a wavelength greater than 400 nm. The process can not only efficiently synthesize DFF with a selectivity of 90.97%, but also has mild reaction conditions and simple operation, and is a cheap and efficient method for preparing DFF. The application provides valuable information for solving the problems of environmental pollution and energy shortage by developing and utilizing the photocatalysis of the metal sulfide loaded with the heteropoly acid, and provides a reference for the conversion of renewable biomass resources.

The invention relates to the technical field of engineering reinforcing materials, in particular to a bamboo geocell and a manufacturing method thereof.The bamboo geocell comprises a three-dimensional net-shaped structure formed by connecting a plurality of geocell walls at joints, and the three-dimensional net-shaped structure forms a plurality of deformable geocell spaces used for containing filler; wherein the grid chamber walls are flexible composite strips formed by weaving bamboo strips, and the composite strips are arranged to be provided with holes distributed in a dot matrix mode so as to form a hollow grid structure. Compared with a traditional macromolecule geocell wall, the hollow grating type geocell wall formed by sewing, bonding and compounding the bamboo split strips is light in weight and high in strength, a three-dimensional meshing interface and a horizontal drainage channel are created for the geocell wall, the problems that the macromolecule geocell interface is weak in friction and poor in drainage function are solved, renewable biomass materials are adopted, and the environment is protected. Bamboo is used for replacing plastic, carbon emission can be reduced, natural degradation can be achieved, no environmental burden is caused after scrapping, and meanwhile the economic development of regions with rich bamboo resources and backward economy is promoted.

The invention discloses a degradable biological composite material based on PCL and straw filler and a preparation method of the degradable biological composite material, and relates to the technical field of biodegradable composite materials, the biological composite material takes PCL as a matrix and triticale straw and oat straw as filler, and the degradation performance is remarkably improved on the basis of maintaining the performance of the composite material; the straw filler has the advantages of being low in cost, wide in source, renewable, environmentally friendly and the like. The formula and the preparation process of the PCL / straw composite material are simple, the operability is high, and the PCL / straw composite material has wide application potential, especially in the field of degradable biological composite materials. Part of materials of the composite material are derived from natural renewable substances, the composite material has good biodegradability and environment-friendly characteristics, meanwhile, the processing stability of the PCL matrix is ensured, and the composite material is suitable for products such as packaging materials and transplantable seedling pots.

The invention discloses an environment-friendly mirror back coating composition and a preparation method thereof, and belongs to the technical field of functional paints.The composition is prepared from, by weight, 40-60 parts of bio-based emulsion, 2-10 parts of amino resin, 10-30 parts of pigment filler, 5-10 parts of anti-rust pigment, 0.5-5 parts of auxiliaries, 3-8 parts of solvent, 0.2-1.5 parts of thickener and 5-20 parts of deionized water. According to the composition, the composite bio-based emulsifier is synthesized from cashew nut shell liquid, glucose and fatty alcohol renewable biomass resources, a petroleum-based raw material is completely replaced, and the composition has the characteristics of low carbon and environmental protection; by compounding the nonionic emulsifier and the anionic emulsifier, a firm interfacial film with low interfacial tension is formed, and high conversion rate and long-term stability of the emulsion are realized; the formed coating has the advantages of strong adhesive force, corrosion resistance and excellent mechanical property, and is suitable for protecting the back surface of a silver-plated or aluminum-plated glass mirror; the preparation process is simple, environment-friendly and suitable for industrial production.

The invention relates to the technical field of new energy materials and lithium metal batteries, and provides a composite solid-state electrolyte membrane, a preparation method and application thereof and a solid-state lithium metal battery. The composite solid electrolyte membrane provided by the invention comprises a polymer matrix, a functional filler and a lithium salt, wherein the functional filler is a cellulose-based derivative. The cellulose-based derivative is used as the functional filler, so that the ionic conductivity and the lithium ion transference number of the composite solid electrolyte membrane can be improved, the interface stability and the thermal stability can be improved, the electrochemical window can be widened, meanwhile, the mechanical property of the electrolyte membrane can be improved, and the cellulose-based derivative has a wide application prospect in a solid lithium metal battery. Moreover, the raw material of the cellulose-based derivative is derived from renewable biomass resources, so that the cellulose-based derivative is green, environment-friendly, low in cost and good in economic benefit.

The invention discloses a bio-based macromolecular phosphorus-containing flame retardant, the molecular structure of the bio-based macromolecular phosphorus-containing flame retardant comprises substances such as vanillin, dialkyl phosphite, phosphonyl dichloride and the like which are used as raw materials, and a macromolecular structure unit containing a bio-based structure is obtained through two-step reaction; the molecular weight of the bio-based macromolecular phosphorus-containing flame retardant is 10000 to 100000. The bio-based macromolecular phosphorus-containing flame retardant disclosed by the invention not only embodies the environment-friendly characteristic on the basis of renewable biomass raw materials, but also realizes effective combination of high phosphorus content and high molecular weight through an innovative molecular structure design; the flame retardant has the advantages of efficient and lasting flame retardant property, excellent thermal stability, migration resistance and good compatibility with various polymer matrixes.

The invention discloses hyperbranched bio-based benzoxane resin and a preparation method thereof, and belongs to the technical field of thermosetting resin. The preparation method comprises the following steps: 1) mixing diphenolic acid with alkyl glycol for reaction, and then adding bio-based diamine and formaldehyde for reaction to obtain a hyperbranched bio-based benzoxazine monomer; and 2) carrying out stepped heating and pressure curing on the obtained hyperbranched bio-based benzoxazine monomer to finally prepare the hyperbranched bio-based benzoxazine resin. Based on a unique three-dimensional topological structure, the hyperbranched bio-based benzoxazine resin prepared by the preparation method disclosed by the invention has excellent mechanical strength and toughness, good thermal stability and flame retardance and outstanding comprehensive performance while keeping the environment-friendly advantage that raw materials are derived from renewable biomass; wide application prospects are shown in the fields of high-performance composite materials, electronic packaging, aerospace and the like.

This invention belongs to the field of bio-based polymer material additives, and relates to a bio-based lignin phenol-based phosphite antioxidant, its preparation method, and its application. Using lignin oxidation degradation products from green and renewable biomass resources as raw materials, this invention synthesizes a lignin phenol-based phosphite antioxidant through structural design. This antioxidant can be used to replace traditional phosphite antioxidants like Antioxidant 168 in polymer materials, improving the thermal stability and antioxidant performance of polymer materials and avoiding the dependence on fossil resources caused by traditional antioxidant production. Simultaneously, this invention explores a new path for the high-value utilization of lignin. The structure of the lignin phenol-based phosphite antioxidant is shown in Formula I.

The application discloses a toughened starch-based single-component intumescent flame retardant and a preparation method and application thereof. The method is to use starch, hexaphosphate, amino acid and other substances as raw materials to prepare the toughened starch-based single-component intumescent flame retardant through a hydrothermal one-pot method. The preparation method is simple, the synthesis condition is mild, most of the raw materials are renewable biomass materials, and the method is green, environment-friendly and pollution-free. The prepared starch-based single-component intumescent flame retardant is good in thermal stability, high in flame-retardant efficiency, excellent in anti-dripping and smoke suppression performance, excellent in mechanical performance, small in particle size and good in compatibility with polylactic acid, can retain the degradation capacity of polylactic acid itself, effectively realizes the toughening of the polylactic acid material, and greatly expands the application range of the polylactic acid material.

The application discloses a method for preparing imidazole pyridine compounds from lignin and model compounds by using a Pd / C two-component system as a catalyst, and in particular relates to a new method for one-step catalytic conversion of lignin beta-O-4 model compounds or lignin raw materials into imidazole pyridine heterocyclic chemicals by using Pd / C as a catalyst, using elemental iodine as an additive, using a mixture of an organic solvent and water as a reaction solvent, and using an amino pyridine compound as a nitrogen source. The application uses renewable biomass as raw materials, the raw materials are cheap and widely available, inorganic acids and bases are not needed in the reaction process, the reaction conditions are mild, the yield of the target product is high, and the catalyst can be recycled, so that a new route is provided for preparing high-value-added imidazole pyridine heterocyclic chemicals from lignin.

The invention discloses a bio-based electrolyte additive, a preparation method and application, the bio-based electrolyte additive is N-(3-indoleethyl)-5-oxopyrrolidine-2, 3-dicarboxylic acid, the raw material of the additive is derived from renewable biomass resources, a tryptophan precursor can be derived from microbial metabolism of natural tryptophan, and the tryptophan precursor can be derived from natural tryptophan. The trans-aconitic acid can be directly extracted from plants such as aconite, and the N-(3-indoleethyl)-5-oxopyrrolidine-2, 3-dicarboxylic acid is synthesized through two green and renewable bio-based raw materials. As an electrolyte additive of a water-based zinc battery, the tryptamine-trans-aconitic acid composite electrolyte fuses interface adsorption of tryptamine and ion coordination capability of trans-aconitic acid, synergistically constructs a stable electrode-electrolyte interface, can synergistically inhibit side reactions such as growth of zinc dendrites and hydrogen evolution, significantly alleviates zinc negative electrode corrosion, realizes a long-cycle-life water-based zinc battery, and has a wide application prospect. The cycle life of the aqueous zinc battery reaches 2500 hours.

The invention provides a photopolymerization imide monomer and application thereof in self-repairing degradable polyimide, and belongs to the field of preparation of macromolecular organic compounds. Wherein the structural general formula of the imide monomer is shown in the specification, X is one or more of a group shown in the specification, and the imide monomer is obtained by performing simple chemical derivatization on renewable biomass lipoic acid. The imide monomer can be directly subjected to a bulk photopolymerization reaction in the absence of a solvent to prepare a polyimide film material containing dynamic disulfide bonds in a molecular structure, and repair and degradation of the polyimide material can be realized by reversible fracture and recombination of dynamic covalent bonds.

The application discloses a green, low-cost and high-performance lignin adhesive as well as a preparation method and application thereof, and belongs to the technical field of efficient comprehensive utilization of lignin. The preparation method adopts a deep eutectic solvent (DES) composed of choline chloride, urea, acetic acid and glycerol to efficiently dissolve, degrade and modify lignin and improve the reaction activity of the lignin. In combination with the solidification and crosslinking effects of citric acid, a dense network structure is constructed, and the bonding strength and water resistance are significantly enhanced. The dry strength of the adhesive reaches 4.45 MPa, and the wet strength reaches 1.55 MPa, which exceeds the industrial standard and is expected to replace formaldehyde-based resins. The raw materials used are all renewable biomass, the process is simple, and the product is suitable for industrial production. The product is low-toxic, degradable and carbon-negative, conforms to the green manufacturing concept, and is suitable for fields such as packaging, furniture and building.

The present application relates to a kind of betulin olefin dimers, including a synthetic route: using the cross-metathesis reaction in olefin metathesis reaction of alpha-betulin olefin derivative, obtain betulin-based olefin dimers, which can be used as the initiator of ring-opening polymerization, construct telechelic betulin-based polymer.The synthesis method of betulin-based olefin dimers involved in the present application uses the cross-metathesis in olefin metathesis reaction, which has the advantages of simple method, mild condition etc., can realize its structure control and performance adjustment by controlling derivative carbon chain length, has certain advancement, it has chain initiation structure, can prepare telechelic betulin-based polymer, to realize the high value and functionalization of natural products, the utilization of renewable biomass resources also conforms to sustainable development.

The utility model relates to the technical field of biomass particle production equipment, in particular to a renewable biomass material forming die which comprises a forming box, a discharging plate and a material receiving device, the material receiving device comprises a material receiving box, an installation assembly, a protection assembly and an auxiliary assembly, and the material receiving box is detachably connected with the forming box. The mounting assemblies are arranged on the forming box and the material receiving box correspondingly, the protection assembly is arranged on the material receiving box, the auxiliary assemblies are arranged on the material receiving box and the forming box correspondingly, and in the material discharging process, the material receiving box is detachably mounted on the left side of the forming box through the mounting assemblies, so that a rectangular opening faces one side of a discharging plate; and when the materials are discharged through the discharging plate, the materials enter the material receiving box and are buffered by the protection assembly, so that the materials are conveniently collected, the collected materials are conveniently taken out, and use is convenient.

The invention relates to the technical field of nanofiber base material preparation, and discloses a green preparation method of a biomass nanofiber base material, which comprises the following steps: physically crushing and drying a renewable biomass raw material, and then carrying out at least one green pretreatment, the green pretreatment comprises but is not limited to dilute alkali treatment, bleaching treatment or enzyme pretreatment to obtain a pretreated biomass material; carrying out an oxidation reaction on the pretreated biomass material and ammonium persulfate to prepare a suspension containing oxidized biomass nanocellulose; and dialyzing and purifying the suspension containing the oxidized biomass nanocellulose. According to the method, renewable agricultural wastes are selected as initial biomass raw materials, and mild dilute alkali, bleaching or enzyme pretreatment technologies are adopted in the pretreatment stage, so that the dependence on strong acid, high-pollution chemicals or high-energy-consumption equipment in a traditional preparation method is greatly reduced, and the concept of sustainable development is met.