98 results about "Biodegradable composites" patented technology

The invention relates to the technical field of high polymer material preparation, and discloses a bamboo fiber graft modified full-biodegradable composite membrane material preparation process which comprises the following steps: firstly, performing hot mixing and cooling on dried bamboo fiber powder, anhydrous citric acid, choline chloride, activated zinc oxide and pentaerythritol to prepare a bamboo fiber modified premix; then mixing the biodegradable polyester resin with the premix; adding the mixture into an extruder, injecting epoxidized soybean oil into a barrel through a liquid metering device, and performing melt extrusion granulation under a vacuum exhaust condition; and finally carrying out blow molding to form the film. Through in-situ reaction extrusion of multi-component synergism, surface grafting of bamboo fibers, chain extension of a polyester matrix and interface chemical bonding of the bamboo fibers and the polyester matrix are achieved, interface compatibility is effectively improved, degradation of the material in the processing process is inhibited, and the mechanical property and thermal stability of the composite film material are remarkably improved; the process is efficient and environment-friendly, and the cost is controllable.

Described herein is a method of preparation of biodegradable composite material such as bio- composite leather from fungal fibres, preferably, mushroom fibres According to the invention, bio-composite leather is prepared by blending of fungal fibres, preferably, mushroom fibres extracted from mushroom fruiting bodies and a biodegradable polymer. The present invention also relates to the biodegradable composite material produced from fungal fibres preferably mushroom fibres or mushroom fruiting body fibres.

The application belongs to the technical field of biodegradable materials, and particularly relates to a biodegradable composite material and a preparation method thereof. The biodegradable composite material comprises, by mass fraction, 50-60 parts of PHBH, 30-40 parts of PBAT, 10-20 parts of PLA and 1-4 parts of a compatibilizer. The compatibilizer is a PLA-g-MAH graft copolymer or an epoxy chain extender REC. The total amount of the PHBH, the PBAT and the PLA is 100 parts. The PHBH, the PBAT and the PLA are used as main raw materials of the biodegradable composite material, and the three are blended and modified to improve the respective performances. By adding the compatibilizer in the raw materials, the mechanical properties of the prepared composite material are significantly improved, and the composite material has good biodegradability.

The invention belongs to the technical field of biodegradable composite materials, and discloses a preparation method and application of a PVA-PLA (Polyvinyl Acetate-Poly Lactic Acid) multi-layer high-barrier film based on metal-phenolic network enhancement. The preparation method comprises the following steps: firstly, preparing a PVA (Polyvinyl Alcohol) composite solution containing lignin and a polyphenol compound, and carrying out film casting to obtain a base layer film; then preparing a PLA coating solution containing Femetal ions; and finally, immersing the base layer film into the PLA coating liquid, and constructing a multi-layer structure through solvent volatilization. The core of the invention is that a polyphenol compound in the base layer and Fe in the PLA layer are utilized to form a metal-phenolic aldehyde network coordination bond at an interface, and the metal-phenolic aldehyde network coordination bond is used as a molecular bridge, so that the interface bonding force between PVA and PLA is greatly enhanced, and the problem of interface layering caused by polarity difference between PVA and PLA is effectively solved. Meanwhile, due to the synergistic effect of the lignin and the polyphenol compound, the film is endowed with excellent oxygen, carbon dioxide and water vapor barrier properties and an antibacterial function. The film is green and safe, and is suitable for active packaging of food, especially fresh keeping of fruits and vegetables.

The present invention relates to the production of biocomposite materials through the co-cultivation of mycelium and algae. This innovative method integrates sustainable practices and utilizes waste materials to create carbon-negative, durable, and biodegradable composites suitable for various applications, including interior design, construction, automotive and packaging.

The invention discloses an irradiation cross-linked biodegradable composite plastic straw and a preparation method thereof. The irradiation cross-linked biodegradable composite plastic straw is prepared from the following raw materials in percentage by mass: 40-80% of polylactic acid, 15-45% of nano inorganic filler, 0.4-1% of chain extender, 1-3% of flexibilizer, 1-3% of lubricant, 0.3-1% of nucleating agent, 0.3-1% of coupling agent, 1-10% of cross-linking agent and 0.3-1% of compatilizer. The chain extender is an epoxy group chain extender copolymer which contains 6-9 epoxy functional groups and is formed by copolymerizing glycidyl methacrylate, styrene and acrylic acid low-carbon alcohol ester through a solution polymerization or suspension polymerization process. The heat resistance of the polylactic acid composite plastic can be improved through irradiation processing, the polylactic acid composite plastic straw has higher heat resistance and does not deform in a high-temperature use environment, and pathogenic bacteria and viruses in a product are killed in the irradiation crosslinking process at the same time.

The present invention relates to a fully biodegradable composite structure, which is in the form of a sheet in a specific form and can be used for producing artificial leather, said composite structure having a surface layer formed with a biodegradable polymer as a polymer component, a composite layer made of a biodegradable polymer composition, the fabric layer is made of a biodegradable textile base material; and the surface layer is made of a biodegradable polymer which can be dispersed in water. The invention also relates to a method for producing such a composite structure, in which the composite structure can impart a desired surface structure, a method for composting the composite structure, and a method for separating the layers of the composite structure, in which the composite structure is treated by an organic solvent, which can selectively dissolve one or more layers in the composite structure.

The invention relates to a biodegradable composite material comprising a biodegradable polymer matrix and Padauk wood particles dispersed in said polymer matrix.

The invention belongs to the field of composite materials, and particularly relates to a wheat straw cellulose full-biodegradable composite material which is prepared by the following steps: (1) preparing hydrophobically modified MFC; (2) pre-degrading PLA (polylactic acid); (3) preparing fungal spore microcapsules; and (4) extruding and granulating to obtain the wheat straw cellulose full-biodegradable composite material. According to the scheme, full-biodegradable raw materials such as wheat straw cellulose, PBS and PLA are selected as main bodies, high-value utilization of agricultural waste is achieved, the degradable property of the material is guaranteed from the source, meanwhile, the mechanical property is improved by introducing a hydrophobic modified micron cellulose reinforced phase, the degradation time is precisely regulated and controlled in cooperation with a pH response type fungal spore microcapsule, and the degradation efficiency is improved. And the material has environment-triggered degradation capability while maintaining the use performance.

The preparation method of the biodegradable spunlace non-woven fabric specifically comprises the following steps: step 1, weighing degradable composite fibers, quantitatively conveying the degradable composite fibers into a pre-opener for pre-opening, and then conveying the degradable composite fibers into a fine opener for fine opening; step 2, carding the finely opened degradable composite fibers to form a fiber web; 3, the obtained fiber net is sent to a spunlace area to be reinforced, fiber cloth is obtained, then hydrophilic softening finishing and shaping finishing are sequentially conducted on the fiber cloth, and the biodegradable spunlace non-woven fabric is obtained; the degradable composite fiber is prepared from the following raw materials: PLA resin, PBAT resin, maleic anhydride, vinyl triisopropoxy silane, white carbon black, glycerol, epoxidized soybean oil, modified montmorillonite and polyethylene wax. And when buried underground, the fertilizer can be naturally degraded into water and carbon dioxide required by crop growth, and has no pollution to the environment.

The invention relates to the technical field of high polymer materials, and particularly discloses a high-barrier biodegradable composite film and a preparation method thereof. The high-barrier biodegradable composite film comprises an outer layer, a sandwich layer and an inner layer, and the outer layer and the inner layer are prepared from the following raw materials in parts by weight: 60-80 parts of PLA resin, 10-30 parts of PBS resin, 5-20 parts of PGA resin, 1-2 parts of a plasticizer, 2.5-3 parts of a chain extender, 2-4 parts of a barrier enhancer and 1.5-2.5 parts of maleic anhydride grafted PLA; and the sandwich layer is a fiber membrane prepared by mixing silane modified nano cellulose and nano-silver-loaded guar gum nanofiber. The composite film has the advantages of being high in barrier capacity, good in antibacterial effect, lasting in antibacterial property, high in mechanical strength and tight in interlayer combination.

Full-loop, method, process and system for the manufacture, utilization, and reclamation of single-use plastic cups including a cup and a compostable coupling that inhabits the recess of the subjacent frustoconical recess of the cup and is comprised of hydrophilic, biodegradable composites that absorb condensation. The invention provides for customer convenience while enhancing recycling initiatives. Comprising a full-loop system that originates at inception with purposeful design and compostable composites the invention functions through behavioral prompting visual animating indicia during utilization. The invention revolves within compostable composites and their respective data and motif characterizations that are digitally visible on hydraulically crushed cups which instruct reclamation robotics to programmatically recognize, target and sort single-use plastic cups, collectively enabling a systemic pathway of manufacture, utilization, and reclamation of the cup and coupling for the purpose of expanding the infrastructure of recycling and accordingly preserve the life-sustaining elements of air, water, and soil.

This invention relates to the technical field of textile packaging products, and in particular to a composite textile packaging bag and a composite process, comprising the following steps: S1, slurry preparation and homogenization: a bio-based polymer, plasticizer, modified nanofiller and solvent are mixed in proportion and placed in a stirring device for mixing and stirring to form a homogeneous functional composite slurry; S2, substrate pretreatment: a biodegradable textile substrate is provided and its surface is activated; S3, slurry coating; S4, gradient curing and composite: the substrate coated with slurry is sequentially passed through a first heating zone, a second heating zone and a third heating zone with gradient temperatures for stepwise drying, cross-linking curing and cooling, so that the functional composite slurry forms a dense barrier layer on the surface of the substrate, thereby obtaining the multifunctional biodegradable composite material; the substrate and slurry components used are biodegradable, improving environmental friendliness.

The invention relates to the technical field of compatilizers, and particularly discloses a P34HB-g-GMA compatilizer as well as a preparation method and application thereof. The P34HB-g-GMA compatilizer is prepared from the following preparation raw materials in percentage by mass: 88%-98% of poly (3-hydroxybutyrate-4-hydroxybutyrate), 0.02%-2% of an initiator, 1%-10% of glycidyl methacrylate, 0.1%-1% of an inhibitor, 0.1%-1% of a lubricant and 0.1%-1% of an auxiliary agent, wherein the sum of the mass percentages of the preparation raw materials is 100%. The P34HB-g-GMA, which is prepared by carrying out addition reaction on GMA serving as a grafting monomer and free radicals on a P34HB molecular chain, has the property of a compatilizer, and can be used for effectively improving the compatibility between PHA and other biological materials and improving the stability and the mechanical property of the composite material when being applied to a biodegradable composite material.

The invention relates to the field of high polymer materials, and particularly discloses a biodegradable composite express packaging bag and a preparation method thereof. A biodegradable composite express packaging bag comprises an outer layer film, a fiber layer, a framework layer, a fiber layer and an inner layer film. The outer layer film and the inner layer film are PBAT blended films, and the PBAT blended films are prepared from the following raw materials in parts by weight: 5 to 6 parts of PBAT resin, 1 to 1.5 parts of polyglycolic acid, 3 to 4 parts of polypropylene carbonate, 0.05 to 0.1 part of compatilizer, 0.15 to 0.2 part of antioxidant and 0.1 to 0.15 part of lubricant; the raw materials of the fiber layer comprise PBAT resin, PBST resin and a compatibilizer, and the fiber layer is prepared through melt differential electrostatic spinning; and the framework layer is an aramid nanofiber layer loaded with MOF-808. The biodegradable composite express packaging bag has the advantages of being high in longitudinal and transverse tensile strength, high in tear resistance, suitable for express packaging, capable of being biodegraded and excellent in barrier property.

Disclosed are a surface-modified in vivo inflammation suppressing material, a method for manufacturing same, a functional biodegradable composite material applying same, and a method for manufacturing the functional biodegradable composite material. Specifically, provided are an inorganic in vivo inflammation suppressing material with increased hydrophobicity and a method for manufacturing same, and disclosed are a functional biodegradable composite material applying same to a biodegradable polymer with increased hydrophilicity and a method for manufacturing the functional biodegradable composite material.

The invention discloses a biodegradable composite material as well as a preparation method and application thereof. The biodegradable composite material is formed by laying and hot-pressing a multi-layer structure, when the multi-layer structure is laid, a hydrophobic fiber layer A, a filling fiber layer A, a PBAT film layer, a filling fiber layer B and a hydrophobic fiber layer B are sequentially arranged from top to bottom; the hydrophobic fiber layer A and the hydrophobic fiber layer B are prepared from 20-40 parts of natural plant fibers in total, and the filling fiber layer A and the filling fiber layer B are prepared from 10-20 parts of cereal crop straw fibers and 2-6 parts of PBAT in total; according to the invention, a lamination heat sealing process is adopted, complex melt blending and granulation processes are avoided, and the production process is simple and low in energy consumption; the main raw materials are from agricultural wastes and biodegradable plastics, are wide in source and low in cost, are particularly suitable for manufacturing seedling culture containers, are not damaged in transportation and stacking processes due to good strength, are convenient to tear during transplanting due to excellent toughness, and can be fused with soil and provide nutrients for seedlings after being degraded.

Composite material based on stacked alternate layers of: - a matrix based on a polymer of natural origin derived from renewable sources in the form of thin films; said matrix can be PolyLactic Acid (PLA) or Polybutylene Succinate (PBS); - natural plant fibres, preferably flax, hemp, jute. In a first embodiment, such natural plant fibres are in the form of a fabric provided with a warp and weft perpendicular to each other. In a second embodiment, such natural plant fibres are in the form of unidirectional windings of tapes obtained through filament winding technique. The present invention further comprises two methods for the preparation of the first and of the second embodiments, respectively. The composite materials according to the present invention can be used to produce medical devices intended for supporting patients.

The present invention provides a tissue-restoring biodegradable composition comprising microspheres that contain poly-L-lactic acid (PLLA) and hydroxyapatite (HAp). In addition, the present invention provides a method for preparing a tissue-restoring biodegradable composition, comprising the steps of: preparing microspheres by mixing poly-L-lactic acid and hydroxyapatite; and adding hyaluronic acid to the microspheres, wherein a collagen tissue regeneration effect is maintained from the initial stage to the final stage after a filler injection.

The present application relates to the technical field of plastic film, in particular to a high-strength biodegradable composite film and a preparation method thereof.The present application overcomes the shortcomings of poor strength and poor barrier property of the existing film.The present application feeds a mixture of polylactic acid, modified montmorillonite, modified polycaprolactone and stearic acid amide into a double-screw extruder;then step-by-step blends the mixture A and 1,4-butanediol diglycidyl ether;finally, the material is extruded, cooled and granulated to obtain a composite material;the composite material is blown into a film to obtain the composite film;wherein the mixture A comprises polybutylene adipate terephthalate, modified mesoporous nanosilica, zinc laurate and 2-phenylimidazoline;the modified polycaprolactone is prepared from the polycaprolactone, maleic anhydride and dicumyl peroxide.The film prepared by the present application has high strength and good barrier property.

This invention discloses a bamboo powder biodegradable composite masterbatch, its preparation method, and a composite film, belonging to the field of biodegradable materials technology. Addressing the problems of limited bamboo powder addition, single function, and poor process adaptability in existing technologies, this invention modifies bamboo powder through "organic acid etching-silane grafting-nano-coating," and combines it with composite compatibilizers, nano-barriers, multifunctional chain extenders, and other components. The composite masterbatch is obtained through raw material mixing and melt extrusion; the masterbatch is then blown into a composite film. This invention maintains stable mechanical properties of the film within a wide range of bamboo powder additions without additional fillers, simultaneously achieving barrier and antibacterial functions. Furthermore, the process relies on conventional equipment, is suitable for continuous industrial production, and can be applied to packaging materials, agricultural films, and other scenarios.

A biotextile for a plant-based leather product comprises a partially or fully biodegradable composite including: a polymer matrix comprising a bio-based polymer, and a cellulosic material dispersed in the polymer matrix. At least one property of the composite is sufficient to meet an industrial standard for leather or vinyl. A method of making the composite may include heating and mixing a formulation comprising bio-based polymer, a plasticizer, and a cellulosic material to form a molten mixture, extruding the molten mixture to form an extruded body having a predetermined shape, and cooling the extruded body to form a composite having the predetermined shape, which may be a sheet, rod, pellet, or granule. The composite includes a polymer matrix comprising the bio-based polymer with the cellulosic material dispersed therein. A plant-based feedstock material comprising the composite may be used as a raw material for injection molding or 3D printing.

The present invention relates to a process for manufacturing a biodegradable composite. The process comprises the following steps: a) providing a bio waste selected from a group comprising a brewery spent grain, food production waste, used ground coffee and composition thereof; b) dewatering of provided bio waste; c) shredding of provided bio waste into pieces; d) drying the shredded pieces until a moisture level into the piece is down to 3-7%; e) grinding of dried pieces into smaller particles so that a size of the particles is less than 350 to 100 micrometres; and f) blending grinded particles with polybutylene succinate in result of which a biomaterial composite is formed, wherein the biomaterial composite comprises 10 to 50 % by weight the grinded particles and 50 to 90 % by weight of polybutylene succinate.

The invention belongs to the technical field of preparation of medical degradable metal-based composite materials, and relates to a biodegradable composite material and a preparation and application method thereof. The preparation method comprises the following steps: 1, taking graphene oxide, silver nitrate and ferric nitrate as raw materials, and enabling Ag and Fe2O3 nanoparticles to grow on the surface of the graphene oxide together in situ through a hydrothermal method, so as to form (Ag + Fe2O3) coated GO; 2, (Ag + Fe2O3) coated GO is uniformly dispersed in Zn powder through wet ball milling, and (Ag + Fe2O3) coated GO / Zn mixed powder is obtained; and 3, the mixed powder is subjected to sintering and plastic processing, and the ZnO-coated GO / Zn-Fe-Ag alloy-based composite material is prepared. And reinforcing the zinc matrix by using an in-situ alloying reaction between the Ag nanoparticles and the zinc matrix, and endowing the zinc matrix with an antibacterial characteristic, so as to finally obtain the biodegradable ZnO (at) GO / Zn-Fe-Ag biological composite material with good comprehensive performance.

The application relates to the technical field of high polymer materials, and particularly discloses a high-barrier biodegradable composite film and a preparation method thereof. The high-barrier biodegradable composite film comprises an outer layer, a sandwich layer and an inner layer, and the outer layer and the inner layer comprise the following raw materials in parts by weight: 60-80 parts of PLA resin, 10-30 parts of PBS resin, 5-20 parts of PGA resin, 1-2 parts of a plasticizer, 2.5-3 parts of a chain extender, 2-4 parts of a barrier enhancer and 1.5-2.5 parts of maleic anhydride grafted PLA; and the sandwich layer is a fiber film prepared by mixing silane-modified nanocellulose and nanosilver-loaded guar gum nanofiber. The composite film has the advantages of high barrier capacity, good antibacterial effect, long-lasting antibacterial property, high mechanical strength and tight interlayer combination.

A gas barrier substrate comprising a biodegradable composite, the biodegradable composite comprising a polymeric matrix and a sustainable filler comprising protein. Also articles of manufacture comprising the gas barrier substrate and methods of limiting gas permeation using the gas barrier substrate.

The invention discloses an environment-friendly degradable composite plastic and a preparation method thereof.The environment-friendly degradable composite plastic is prepared through a reaction of modified resin and 1, 4-bis (maleimide) butane, when the modified resin and the 1, 4-bis (maleimide) butane are mixed, a furan group can be subjected to a DA reaction with a maleimide group, and then dynamic crosslinking is formed; polylactic acid molecules and polyester molecules are linked through organic silicon chain segments, molecular chains are in a snowflake-like radial shape, the radial structure is connected with a plurality of branches through a central core to form a three-dimensional network, and the structure can effectively disperse stress and improve the overall strength and rigidity of the material, so that the mechanical property of the material is improved. The branches can absorb and disperse external impact energy and are matched with dynamic crosslinking, so that the mechanical property of the composite plastic can be further improved.

This invention belongs to the field of packaging materials technology, and particularly relates to a biodegradable composite film-paper material and its preparation method. The biodegradable composite film-paper material comprises a polymer layer and a paper layer. The polymer layer, by weight, comprises the following components: 70-80 parts polylactic acid, 20-30 parts polycaprolactone, 1-3 parts synergist, 8-10 parts citrate starch, 0.3-1.0 parts lubricant, and 0.2-0.5 parts antioxidant. Experimental results show that the biodegradable composite film-paper material prepared by this invention has an antibacterial grade of 0, a tensile strength of 30-34 MPa, and an elongation at break of 415-450%.

In the present invention, provided are a biodegradable composition and a biodegradable film, which comprise a poly (butylene adipate-co-terephthalate) having a maleate bonded to a terminal hydroxyl group, and have a predetermined peak area ratio.

The invention discloses a biodegradable composite high-molecular three-dimensional scaffold and a preparation method thereof, the three-dimensional scaffold comprises a matrix material and an active substance loaded on the matrix material, and the matrix material is selected from biodegradable high-molecular polymers with biocompatibility; the active substance is wedelolactone lipidosome, or the wedelolactone lipidosome and beta-tricalcium phosphate nano particles. The degradable biofilm based on the single wedelolactone liposome has a good promotion effect in the aspect of tissue repair; the scaffold is combined with wedelolactone lipidosome and beta-tricalcium phosphate nano-particles, so that bionic design of natural bone tissues can be realized, functional complementation of nano-materials is realized, good cell compatibility is realized, osteogenesis performance is effectively promoted, and the scaffold has a good application prospect. Meanwhile, the biodegradable high polymer material based on the wedelolactone lipidosome has a good prospect in the field of tissue regeneration and repair.