163 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.

Polylactic acid (PLA) / biomass composite including: polylactic acid (PLA), a biomass material, a compatibilizer, a crosslinker, a chain extender, an antioxidant, and a nucleating agent, wherein the PLA, the biomass material, the compatibilizer, the crosslinker, the chain extender, the antioxidant, and the nucleating agent are present in the PLA / biomass composite at a concentration of 30-60% wt / wt, 20-70% wt / wt, 5-20% wt / wt, 0.1-2% wt / wt, 0.1-1% wt / wt, 0.1-1% wt / wt, and 1-10% wt / wt, respectively.

The invention relates to a biodegradable composite material as well as a preparation method and application thereof, and belongs to the technical field of compositions of high-molecular compounds. The biodegradable composite material is prepared from the following components in parts by weight: 46 to 87 parts of PBAT resin, 2 to 10 parts of PLA resin, 10 to 40 parts of calcium carbonate, 0.5 to 2 parts of a slipping aid and 0.5 to 2 parts of an edge sealing aid, the molar content of D-lactic acid in the PLA resin is greater than or equal to 2%; the particle size D50 of the calcium carbonate is less than 1.8 microns; the edge sealing auxiliary agent is an ethylene-acrylic acid copolymer, an ethylene-vinyl acetate copolymer, an ethylene-methyl acrylate copolymer, an ethylene-methyl acrylate-glycidyl methacrylate terpolymer, an ethylene-butyl acrylate copolymer, an ethylene-butyl acrylate-glycidyl methacrylate terpolymer, an ethylene-vinyl acetate copolymer, an ethylene-vinyl acetate copolymer, an ethylene-vinyl acetate copolymer, an ethylene-vinyl acetate copolymer, an ethylene-vinyl acetate copolymer, an ethylene-vinyl acetate copolymer, an ethylene-vinyl acetate copolymer and an ethylene-vinyl acetate copolymer. And at least one of epoxy resin. The biodegradable composite material has excellent long-acting edge sealing performance.

The invention relates to the field of biodegradation, and discloses a full-biodegradable composite film as well as a preparation method and application thereof. The composite film comprises a barrier layer, a protective layer and a bonding layer, the protective layer is arranged on the surface layer of the composite film, and the barrier layer and the protective layer are bonded through the bonding layer; matrix resin B of the bonding layer is selected from degradable resin grafted polar monomers and / or degradable resin grafted monomers containing groups capable of reacting with hydroxyl; the matrix resin C of the barrier layer at least contains polyglycolic acid with multimodal molecular weight distribution. The composite film provided by the invention has excellent barrier property and biodegradability, and also has good interlayer peel strength and heat sealing strength.

The invention provides a full-biodegradable composite film and a preparation method thereof. The full composite membrane comprises an outer layer, a middle layer and an inner layer, wherein the outer layer comprises modified calcium carbonate, PLA, PBAT and an epoxy chain extender; the middle layer comprises modified montmorillonite, PLA (polylactic acid), PBAT (poly (butylene adipate-co-terephthalate)), PPC (polypropylene carbonate) and an epoxy chain extender; the inner layer comprises PLA (polylactic acid), PBAT (poly (butylene adipate-co-terephthalate)), an epoxy chain extender and an optional anti-blocking agent. The preparation method of the raw materials of the middle layer comprises the following steps: (i) dividing an epoxy chain extender used by the middle layer into an epoxy chain extender A and an epoxy chain extender B, and mixing PPC, modified montmorillonite and the epoxy chain extender A to prepare a first master batch of the middle layer; (ii) mixing PLA, PBAT and an epoxy chain extender B to prepare a middle-layer second master batch; and (iii) uniformly mixing the middle-layer first master batch and the middle-layer second master batch, extruding and granulating to obtain a middle-layer raw material. The full-biodegradable composite film prepared by the preparation method disclosed by the invention is good in uniformity and quality.

The invention belongs to the technical field of biodegradable materials, and relates to a PBAT / bamboo powder biodegradable composite master batch and a preparation method thereof, and a composite film, the composite master batch comprises the following raw materials by mass: 100 parts of PBAT, 10-30 parts of modified bamboo powder, 5-10 parts of a compatibilization grafting agent, 0.5-1 part of a retardant, 20-30 parts of a blocking agent, and 0.2-0.4 part of a chain extender; the modified bamboo powder is obtained by impregnating bamboo powder with inorganic alkali liquor and modifying with an acyl halide reagent; the compatibilization grafting agent is obtained by grafting and modifying PBAT (poly (butylene adipate-co-terephthalate)) through ultraviolet light of a grafting agent, and the grafting agent is compounded by carboxyl-containing acrylate and unsaturated fatty acid glycidyl ester according to the mass ratio of 1: (1-2). According to the invention, the bamboo powder is modified and a novel compatibilization grafting agent is introduced, so that the hydrophobicity, dispersity and compatibility with PBAT of the bamboo powder are improved, and the prepared composite film has good appearance, high water and oxygen barrier property and better mechanical properties.

The invention relates to the technical field of fertilizer preparation, in particular to a multi-nutrient-element matching blended fertilizer and a preparation method thereof. According to the invention, surface roughening treatment is carried out on the basic fertilizer, so that the friction force among particles is increased, and the fertilizer particles are not easy to slide and separate in the mixing and storage processes. Meanwhile, the added binder microcapsules are broken in the mixing process, a biodegradable composite binder is released, fertilizer particles are firmly bonded together, and the stability of the quality of the fertilizer is guaranteed. The binder microcapsule used in the preparation process is made of a biodegradable material, cannot pollute the soil environment, can be gradually decomposed in the soil, and is beneficial to maintaining the ecological balance of the soil and guaranteeing the long-term fertility and sustainable utilization of the soil. By improving the fertilizer utilization rate, reducing fertilizer waste and improving the crop yield and quality, the comprehensive economic benefits are remarkably improved.

The invention 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 is prepared from the following raw materials in parts by mass: 50 to 60 parts of PHBH, 30 to 40 parts of PBAT, 10 to 20 parts of PLA and 1 to 4 parts of compatibilizer, the compatibilizer is a PLA (polylactic acid)-g-MAH (maleic anhydride-maleic anhydride) grafted 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, the three raw materials are blended for composite modification to improve respective properties, and the compatibilizer is added into the raw materials, so that the mechanical properties of the prepared composite material are remarkably improved, and the composite material has good biodegradability.

The invention discloses a preparation method of an organic expanded vermiculite / full-biodegradable composite material, and belongs to the field of environment-friendly biodegradable materials. The composite material comprises the following raw materials in parts by weight: 5-30 parts of organic expanded vermiculite, 5-60 parts of polylactic acid, a degradable toughening agent and an auxiliary agent, and the vermiculite raw material in the organic expanded vermiculite is soaked in maleic anhydride or a silane coupling agent and is subjected to microwave expansion treatment. Compared with the prior art, degradation residues of the prepared composite material are mainly expanded vermiculite powder, and the composite material is environmentally friendly and free of pollution, has the effect of improving soil and can be applied to the fields of disposable knives, forks, spoons, straws, film bags and the like through formula adjustment of polylactic acid and the full-biodegradable flexibilizer.

A coextruded multi-layer biodegradable composite film was primed either in-line or off-line to form moisture-resistant anchoring structure for EVOH / PHOH barrier coating using primer coating including waterborne polyethyleneimine dispersions and waterborne polyester dispersions. The primed bioplastic composite film was then coated with EVOH / PVOH solution barrier coating. The coated composite film was then metallized through a process of vapor deposition of Aluminum metal in a metallizer chamber. The metallized films made with a process of off-line priming have O2TR in the range of 1.9 to 4.5 cc / m2 / day, and MVTR in the range of 0.1 to 0.4 g / m2 / day; The metallized films made with a process of in-line priming have O2TR in the range of 0.63 to 1.04 cc / m2 / day, and MVTR in the range of 0.027 to 0.075 g / m2 / day.

The invention discloses a straw powder filled biodegradable composite material and a preparation method thereof, and relates to the technical field of biodegradable composite materials, the preparation method of the biodegradable composite material comprises the following steps: S1, pretreating straw; s2, impurities are removed through winnowing; s3, removing magnetic impurities; s4, cleaning and drying; s5, performing high-pressure steam treatment; s6, drying in the oven and crushing again; s7, adding into a high-speed mixer and mixing; s8, extruding the biodegradable composite material, and cooling and shaping the biodegradable composite material; and S9, cutting and polishing are conducted, and performance testing is conducted. The biodegradable composite material is prepared from agricultural waste, waste accumulation is reduced, sustainable development is promoted, the straw powder filled biodegradable composite material has biodegradability, high strength and good processability, and the straw powder filled biodegradable composite material is suitable for large-scale production. The problems of reducing agricultural wastes, enhancing mechanical properties and environmental protection performance, improving processability and reducing raw material cost can be solved.

The invention discloses a biodegradable composite polylactic acid packaging bag and a preparation method thereof, belongs to the technical field of biodegradable materials, and aims to solve the technical problem that the mechanical property, heat resistance and biodegradation rate of a polylactic acid material in the prior art need to be further improved. The material comprises the following components in parts by weight: 90-100 parts of modified polylactic acid, 10-15 parts of modified starch, 15-20 parts of modified nanofiber, 4-8 parts of pigment and 5-7 parts of additive, and is prepared by taking the modified polylactic acid as a basic raw material, the modified starch and the modified nanofiber as reinforcing materials and the pigment and the additive as auxiliary additives. The mechanical strength and high temperature resistance of the packaging bag are effectively improved, and the biodegradability of the packaging bag is improved, so that the packaging bag better meets the requirements of express and logistics industries on biodegradable packaging materials.

The invention discloses a biodegradable composite material, which is prepared from the following raw materials in percentage by weight: 60 to 78 percent of polylactic acid, 20 to 30 percent of flexibilizer, 1 to 10 percent of transparent inorganic matter and 0.1 to 0.5 percent of cellulose. According to the invention, the block polyether amide resin is adopted as the flexibilizer and acts together with the PLA resin, and then the inorganic substance zinc sulfide with high transparency is added, so that the obtained composite material has good tensile toughness and excellent heat resistance. Meanwhile, the transparency and the puncture resistance of the biodegradable composite material film are improved, and the tensile toughness and the heat resistance are obviously improved. While being degradable, the adhesive force is good, the pattern integrity is high, the slitting performance is good, and the holographic hot stamping performance of the alumite film is not affected.

The invention discloses an environmental response type degradable bionic composite membrane and a preparation method thereof, the composite membrane is formed by alternately stacking hydrophobic layers and hydrophilic layers, the hydrophobic layers are PHA / PBS (3: 1-5: 1) blends and added with 2-8 wt% of oleic acid grafted nano-hydroxyapatite, and the hydrophilic layers are modified starch / PVA composite materials with the crosslinking degree of 15-35% and contain 0.5-3 wt% of thermo-sensitive PNIPAM-b-PAA. Mechanical interlocking is realized between layers through a lotus leaf-like micro-nano mastoid structure (the height is 1-5 microns, and the density is 106-107 / cm < 2 >) treated by plasma; micro gravure coating, electrostatic spraying and blade coating processes are adopted for preparation, and the controllable degradation period of 30-180 days can be achieved by regulating and controlling the layer thickness ratio (1: 2-3: 1); the degradation rate of the material in the pH range of 5.5-8.5 is positively correlated with the pH value (R2 is greater than 0.95), the degradation rate is increased by 8-12% when the temperature is increased by 1 DEG C, the degradation rate is greater than 90% in 20-50 days under the composting condition, the degradation product is ecologically safe (LC50 is greater than 1000mg / kg), and the material is suitable for intelligent agricultural mulching films and environment-friendly packaging.

The invention relates to a method for preparing a PLA / PPC biodegradable composite material by reactive compatibilization, and belongs to a biodegradable material preparation method, and the method comprises the following steps: carrying out maleic anhydride end-capping modification on PPC; (PLA, modified PPC and an additive are subjected to melt blending. A test proves that the interface compatibility is obviously improved; in the aspect of mechanical properties, the elongation at break reaches 252.8% (improved by 7.0 times compared with that of a non-compatibilization system), the notch impact strength reaches 6.32 kJ / m < 2 > (improved by 2.0 times), and meanwhile, the tensile strength is kept at 54.8 MPa or above. In addition, the light transmittance of the material is improved to 93.0%, the water contact angle reaches 85.71 degrees, meanwhile, the thermal stability is synchronously improved, T95% is greatly improved to 339.62 DEG C from 319.27 DEG C, and the amplification reaches 20.35 DEG C. The high-performance full-biodegradable material has wide application prospects in the fields of packaging films, environment-friendly agricultural films and the like, and a solution is provided for industrial application of green materials.

The invention belongs to the field of high polymer materials, and particularly relates to a biodegradable composite material and a preparation method thereof. The technical problem that an existing biodegradable material product is poor in aging resistance and barrier property is solved. Aromatic-aliphatic copolyester with a side chain is used as a base material, and an esterification-polycondensation process is performed to prepare the polyester. The composite material comprises the following components in parts by weight: 60-90 parts of a copolyester material, 10-30 parts of other blended resin, 20-40 parts of an inorganic filler, 0.5-2 parts of a lubricant and 0.01-2 parts of an epoxy chain extender. The epoxy chain extender is an epoxy chain extender with bio-based aconitic acid as a framework, and the mechanical property and the anti-aging property of the degradable composite material are comprehensively improved based on coordination and cooperation of the base material, the epoxy chain extender and other raw materials. The composite material is expected to be applied to the fields of biodegradable shopping bags, agricultural plastic mulching films, foaming materials and the like.

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 invention discloses a high-heat-resistance PLA / PBS biodegradable composite material and a preparation method thereof, and relates to the technical field of degradable materials. The composite material is composed of a base material and a waterproof layer on the surface of the base material. Wherein the waterproof layer is prepared by vapor deposition of a waterproof composition on the surface of the base material; the base material is formed by injection molding of composite master batches; the composite master batch is prepared from PLA, PBS, modified hybrid fibers, an antibacterial agent, calcium stearate, an antioxidant 1010, a chain extender, epoxidized soybean oil, a flexible modifier and an anti-hydrolysis agent UN-150. By introducing the modified hybrid fiber, the antibacterial agent, the flexible modifier and other components, the mechanical property, the thermal stability, the water resistance, the antibacterial property and the degradability of the composite material are effectively improved; due to the introduction of the waterproof composition prepared from components such as ethyl acetate and heptadecafluorodecyl triethoxy silane, the waterproofness is further improved. Therefore, the method has a wide application prospect.

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.

The invention belongs to the field of polymeric membranes. The invention relates to a low-carbon high-barrier biodegradable composite film and a preparation method thereof, the composite film comprises five layers of films, and the five layers of films sequentially comprise a surface substrate layer, a high-barrier layer, a bonding layer, a transition layer and an inner substrate layer; the high-barrier layer surface is subjected to aluminum oxide vacuum evaporation treatment; the surface base material layer and the high-barrier layer are prepared through double-layer co-extrusion and two-way stretching, and the surface of the high-barrier layer is subjected to vacuum plating; the bonding layer, the transition layer and the inner base material layer are prepared through three-layer co-extrusion and film blowing, and the high-barrier layer surface and the bonding layer surface are subjected to dry compounding and curing to obtain the composite film; the degradable packaging film can effectively overcome the defects that in the prior art, a degradable packaging film is poor in water vapor and oxygen barrier property, transparency is reduced after multiple layers are compounded and the like, and meanwhile compared with a traditional composite film, carbon emission can be reduced by 50% or above.

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.

The invention provides a preparation method of a degradable composite food film based on a bacteriostatic emulsion and a food film, and belongs to the field of food packaging, and the preparation method comprises the following steps: preparing a bacteriostatic agent carvacrol oil-in-water system emulsion; adding glycerol into the biodegradable polymer and the biological polysaccharide, and fully and uniformly mixing; adding the bacteriostatic agent emulsion into the mixture; according to the polysaccharide / bacteriostatic agent emulsion composite food film and the preparation method thereof, a modern production process is adopted, the defect that a hydrophobic bacteriostatic agent needs to be dissolved in an organic solvent and then added into a polymer matrix is overcome, the influence of the organic solvent on food and human health and safety is reduced, and the polysaccharide / bacteriostatic agent emulsion composite food film is prepared. The produced food film is environment-friendly and non-toxic, can be completely biodegraded, is low in water absorption and water vapor permeability and strong in antibacterial performance, can effectively prevent food from being polluted and deteriorated, and provides a novel packaging material for the food industry.