661 results about "Adipate" patented technology

A biodegradable polymer composite, a method of making the same and use for same are provided. The biodegradable polymer composite has about 30 to 99.5% by weight of a polymer selected from a group consisting of polybutylene adipate terephthalate (PBAT), polybutylene succinate (PBS), polyhydroxyalkanoates (PHA), and polycaprolactone (PCL) grafted with a compatibilizer selected from a group consisting of maleic anhydride, glycidyl methacrylate, pyromellitic anhydride, acrylic acid, polyacrylic acid, methylene diphenyl diisocyanate, poly(glycidyl methacrylate, copolymer(s) of glycidyl methacrylate; and about 0.5 to 50 % by weight a nano-filler or a micro-filler. The biodegradable polymer composite does not contain polylactic acid. Surfaces of the nano-filler or the micro-filler may be modified using a grafting agent so that the biodegradable polymer composite has enhanced mechanical properties, increased heat resistance, compostablity and / or improved processability. The biodegradable polymer composite may be used to make flexible articles, such as a freezer wrap and a farming sheet.

The invention relates to the field of plastic bags, and discloses a biodegradable plastic bag and a preparation method thereof, the biodegradable plastic bag comprises polylactic acid, poly (butylene adipate-co-terephthalate), a functional additive, modified starch, a lubricant and an antioxidant; the functional additive is prepared by grafting hydroxylated modified castor oil and isocyanated montmorillonite loaded titanium dioxide; the hydroxylation modified castor oil is prepared by modifying castor oil with chloroethyl isocyanate, then reacting with N-allylimidazole, and then reacting with 6-mercaptohexyl-1-alcohol; the isocyanated montmorillonite loaded titanium dioxide is prepared by reacting montmorillonite loaded titanium dioxide obtained by a sol-gel method with isophorone diisocyanate; the modified starch is prepared by reacting octadecanoyl chloride and acryloyl chloride with starch, then carrying out graft copolymerization with ethyl acrylate and further introducing glycidyl methacrylate, so that the plastic bag is endowed with excellent mechanical properties, biodegradability and antibacterial property.

The invention discloses a preparation method of a completely biodegradable dustproof net based on modified bamboo powder, and belongs to the technical field of biodegradable new materials. The formula comprises the following components in parts by weight: 50-70 parts of poly (butylene adipate-co-terephthalate), 10-40 parts of bamboo powder, 0.1-2 parts of a silane coupling agent, 0.1-1 part of a surfactant, 0.1-1 part of an anti-blocking agent, 0.1-1 part of an antioxidant and 0.1-1 part of an ultraviolet light absorber. The dust screen prepared by the invention not only has biodegradability, but also has the characteristics of being green and environment-friendly by adopting the bio-based material bamboo powder. Meanwhile, in order to realize good combination of the bamboo powder and matrix plastic poly (butylene adipate-co-terephthalate), a silane coupling agent capable of combining the bamboo powder and the matrix plastic poly (butylene adipate-co-terephthalate) through a chemical reaction and a surfactant capable of combining the bamboo powder and the matrix plastic poly (butylene adipate-co-terephthalate) through a physical effect are sequentially adopted for composite modification of the bamboo powder; the dispersity of the bamboo powder and the compatibility of the bamboo powder and poly (butylene adipate-co-terephthalate) are effectively improved, and the prepared dustproof net has good mechanical properties.

The invention belongs to the technical field of electrode foil formation treatment, and particularly relates to an electrode foil and a preparation method thereof and an aluminum electrolytic capacitor, the preparation method of the electrode foil comprises the steps of performing multi-stage formation treatment on a corrosion foil, the number of stages of the formation treatment is at least two, and the formation treatment at least comprises first-stage formation and second-stage formation, first heat treatment is carried out after the second-stage formation; a formation liquid used in the second-stage formation is a mixed solution containing adipate and monopotassium phosphate. According to the preparation method provided by the invention, the formation liquid used in secondary formation is the mixed solution containing adipate and monopotassium phosphate, the limitation of traditional single formation liquid is broken through, and synchronous optimization of the structure, hydration resistance and electrochemical performance of the aluminum oxide film is realized through multi-stage formation, mixed solution synergy and the synergistic effect of formation and heat treatment; meanwhile, production cost is reduced, and environmental load is relieved.

The present application relates to the technical field of bio-based polymer material, and more particularly to a full bio-based PBAT-PLA copolymer, a preparation method and an application thereof, which is prepared by melt mixing bio-based polybutylene adipate terephthalate, bio-based polylactic acid and bio-based multi-epoxy chain extender through a twin-screw extruder, so that the tensile strength of the full bio-based PBAT-PLA copolymer is 31.5-44.3 MPa, and the elongation at break is 85-498%. The bio-based multi-epoxy chain extender prepared by specific selection can simultaneously improve the tensile strength and elongation at break of the full bio-based PBAT-PLA copolymer, and solve the technical problems of poor compatibility of traditional bio-based polylactic acid and non-bio-based polybutylene adipate terephthalate, and the technical problem that the addition of existing chain extenders cannot simultaneously improve the tensile strength and elongation at break of the copolymer.

The invention discloses a preparation method of an environment-friendly degradable single-sided perspective sticker, and belongs to the technical field of modified nano materials. The method comprises the following steps: (1) preparation of a multi-layer composite structure: mixing polylactic acid and poly (butylene succinate), adding nano-montmorillonite and a surface modifier, and carrying out melt blending to form a first-layer melt; stirring poly (butylene adipate-co-terephthalate) and fluorescent carbon nanodots to form a second layer of melt; the first layer, the pressure-sensitive adhesive layer and the second layer are co-extruded and compounded to form a film blank. And (2) construction of the nano-film: biaxially stretching the film blank, imprinting a micropore array, dipping in the silver nanoparticle suspension, and drying to obtain the nano-film. And (3) coating functionalization treatment: immersing into a fluorine-containing nano coating solution, and curing. And (4) post-treatment: carrying out secondary curing. The obtained single-sided perspective sticker is suitable for the fields of buildings, vehicle privacy films and the like, and solves the problems of serious pollution and slow degradation of a traditional sticker.

The invention discloses a degradable express bag material and a preparation method thereof, and relates to the technical field of high polymer materials. The invention discloses a degradable express bag material. The composite material is prepared from the following raw materials in parts by weight: 40 to 50 parts of poly (butylene adipate-co-terephthalate), 20 to 30 parts of polycaprolactone, 5 to 8 parts of modified bamboo fiber, 2 to 4 parts of modified nano montmorillonite, 3 to 6 parts of tributyl citrate, 0.1 to 0.3 part of antioxidant 1076, 1 to 2 parts of iron dithiocarbamate master batch, 2 to 3 parts of maleic anhydride grafted poly (butylene adipate-co-terephthalate) and 0.3 to 0.6 part of zinc stearate. 0.1 to 0.3 part of baicalein; and 1 to 3 parts of chitosan-sorbitol composite coating liquid. According to the degradable express bag material, poly (butylene adipate-co-terephthalate) and polycaprolactone are used as main degradable raw materials, modified bamboo fibers and modified nano-montmorillonite are matched to enhance the mechanical property, an antioxidant 1076, baicalein and the like are added to guarantee the stability and functionality, temperature is accurately controlled in the preparation process, multi-step modification is adopted for optimizing component combination, and the degradable express bag material is prepared. The performance is improved through the composite coating, degradability is achieved, and good usability is achieved.

The present invention discloses a method for preparing a modified PHA composite material using a twin-screw extruder and its application. The method is carried out by in-situ melt blending of polyhydroxyalkanoate PHA, polybutylene terephthalate-adipate PBAT, polyvinyl alcohol PVOH and a chain extender in a twin-screw extruder, so that a multifunctional epoxy or isocyanate chain extender reacts with the terminal groups of PHA, PBAT and PVOH molecules to form a partially cross-linked or grafted structure, thereby achieving enhanced compatibility, improved thermal stability and significant improvement in barrier properties. Experiments have shown that the modified PHA composite material obtained by the present invention has high strength, high elongation, excellent water and oxygen barrier properties and biodegradable properties, and meets the stringent requirements for mechanical properties and barrier properties in multiple fields such as food packaging, agricultural mulch and medical consumables. The preparation method of the present invention is simple and efficient, and can be used for large-scale continuous production on existing twin-screw extrusion equipment.

The present disclosure relates to a biodegradable multilayer film comprising stacked on each other in the following order: a) a first outer layer comprising a first polymer selected from the group consisting of poly (butylene adipate-co-terephthalate) (PBAT), poly (butylene succinate) (PBS), poly (butylene succinate-co-adipate) (PBSA), and mixtures thereof; b) a core layer comprising a blend of thermoplastic starch (TPS) and polybutylene adipate terephthalate (PBAT); c) a second outer layer comprising a second polymer selected from the group consisting of poly (butylene adipate-co-terephthalate) (PBAT), poly (butylene succinate) (PBS), poly (butylene succinate-co-adipate) (PBSA), and mixtures thereof. The present disclosure also relates to a disposable bag, a bioreactor and a container suitable for mixing, packaging, storing or transporting biopharmaceutical substances, wherein the disposable bag, bioreactor and container comprise the biodegradable multilayer film.

The invention discloses environmentally degradable plastic as well as a preparation method and application thereof, and belongs to the technical field of degradable plastic. The degradable modified plastic is prepared from the following raw materials: polylactic acid, poly (butylene terephthalate)-adipate, modified thermoplastic starch, modified cellulose, poly (butylene succinate), epoxidized soybean oil, polyvinyl alcohol, glycerol monolaurate and ethylenediaminetetraacetic acid. Wherein the modified thermoplastic starch is obtained by thermoplastic modification of starch through a plasticizer and modification of castor oil and toluene diisocynate; the modified cellulose is obtained by modifying cellulose acetate with chitosan. By regulating and controlling the types and proportions of the raw materials for preparing the plastic, the plastic with excellent degradation performance and mechanical performance can be obtained, the shopping bag is prepared from the plastic, the loading capacity can be remarkably improved, the plastic is easily degraded by microorganisms in the environment after being discarded, and environmental pollution is avoided.

The invention relates to the technical field of anti-yellowing, in particular to anti-yellowing lining cloth with a hot melt coating and a preparation method of the anti-yellowing lining cloth. Composite carbon dots, an anti-yellowing agent and a composite chitosan solution are adopted to prepare finishing liquid for finishing the lining cloth; the preparation method comprises the following steps: selecting furfural and urea as a carbon source and a nitrogen source, performing one-step hydrothermal synthesis to obtain a nitrogen-doped furfural-based carbon dot, and grafting an amino-terminated polyimidazolium salt antibacterial compound to obtain a composite carbon dot; wherein the amino-terminated polyimidazolium salt antibacterial compound is an amino-terminated halogen-free polyimidazolium salt antibacterial compound which is prepared by taking ethylenediamine, butyric acid, glyoxal and formaldehyde as raw materials based on amine-aldehyde polycondensation and has good biocompatibility; the preparation method comprises the following steps: by taking polybutylene adipate, toluene diisocynate and isophorone diisocyanate as main monomers, polypropylene oxide triol as a crosslinking monomer, 2, 2-dimethylolpropionic acid and 4, 4 '-diaminodiphenyl disulfide as chain extenders and composite carbon dots as an end-capping reagent, adding water and emulsifying to obtain the waterborne polyurethane hot melt adhesive.

The invention discloses a silane-crosslinked low-smoke halogen-free flame-retardant oil-resistant polyolefin cable material and a preparation method thereof. The method comprises the following steps: preparing a bio-based polyesteramide toughening phase which is pre-polymerized by castor oil-based polyamide and poly (butylene adipate-co-terephthalate) and is terminated by itaconic anhydride; the preparation method comprises the following steps: self-assembling phytic acid and melamine to wrap ammonium polyphosphate, so as to prepare supramolecular flame-retardant gel powder; the method comprises the following steps: grafting aramid pulp fibers by using a phosphorus-containing silane coupling agent to prepare a reactive liquid crystal reinforced phase; the preparation method comprises the following steps: blending and banburying the components with a hydrogenated styrene-isoprene-styrene block copolymer, an antioxidant and a peroxide cross-linking agent, carrying out dynamic vulcanization and interface bonding, and carrying out extrusion and electron beam irradiation to finally crosslink. An interpenetrating-topology network structure is formed in the prepared cable material, the crosslinking degree is larger than or equal to 82%, and the cable material is rapid in crosslinking, excellent in oil resistance, low in smoke and free of toxicity and is particularly suitable for super high-rise building hanging cables, deep sea exploration cables and new energy automobile liquid cooling cables.

The invention discloses an antibacterial sanitary towel packaging bag and a preparation method thereof. The antibacterial sanitary towel packaging bag comprises a base material layer, an antibacterial layer and a leakage-proof layer. The base material layer is prepared by blending modified polylactic acid, polybutylene adipate and the like and contains a degradation accelerant; the antibacterial layer contains antibacterial peptide-loaded nano montmorillonite, chitosan and the like, and loofah sponge fiber enhances slow release; and the leakage-proof layer is an ethylene-vinyl acetate copolymer and modified silicon dioxide blended film and is provided with breathable micropores. The preparation method comprises the steps of forming the base material layer, coating the antibacterial layer and the like, and process parameters of each layer are accurately controlled. According to the packaging bag, through cooperation of three layers, the bacteriostasis rate of the packaging bag on escherichia coli and staphylococcus aureus in 24 hours is higher than 99%, the degradation rate of the packaging bag in 83 days is higher than 88%, the oxygen permeability is 4.5-5.2 cm < 3 > / (m224h 0.1 MPa), and the packaging bag has the advantages of long-acting antibiosis, air permeability, leakage prevention, environmental protection, degradation and good mechanical properties, and meets the storage and use requirements of sanitary napkins.

The invention relates to the technical field of composite film preparation, in particular to a multi-additive synergistic enhanced degradable packaging composite film and a preparation method thereof, and the multi-additive synergistic enhanced degradable packaging composite film comprises a matrix material group, a barrier system, an anti-hydrolysis system and a stable system; the base material comprises the following components in parts by mass: 25-35 parts of polylactic acid; 15 to 25 parts of poly (butylene adipate / terephthalate); and 8-15 parts of thermoplastic starch. Through multi-dimensional collaborative design of the matrix material, the barrier system, the hydrolysis-resistant system and the stable system, the performance bottleneck of a traditional material is broken through, and the contradiction between brittleness and flexibility is solved through rigid-flexible blending of matrix components; according to the present invention, the uniform dispersion and the interface strengthening of the nano-filler are ensured by using the melt co-extrusion and the directional arrangement technology, and the composite film prepared by using the process has characteristics of excellent degradation rate, high strength, high barrier property and environmental adaptability, can be widely used in the high-end fields of cold chain food and medicine packaging, and solves the problems existing in the traditional technology.

The invention relates to the technical field of cables, and provides a flexible cable for a robot, which comprises a cable core and a sheath layer wrapping the cable core, the cable core comprises signal lines and power lines. Each signal line sequentially comprises a conductor, a belting layer and a shielding layer from inside to outside; the shielding layer sequentially comprises a first shielding layer and a second shielding layer from inside to outside; the first shielding layer is a bare copper wire mesh layer; the second shielding layer is a tinned copper wire mesh layer; the belting layer is a glass fiber tape layer; the sheath layer comprises the following raw material components in parts by weight: 80-90 parts of polyvinyl chloride resin, 20-30 parts of a plasticizer, 2-4 parts of an anti-aging agent, 2-4 parts of a calcium-zinc stabilizer, 1-4 parts of a lubricant and 6-16 parts of a flame retardant; the plasticizer is prepared from dioctyl phthalate, polyethylene glycol adipate and p-methoxyacetophenone. According to the technical scheme, the problem of low elongation at break of the flexible cable for the robot in the prior art is solved.

The invention relates to the technical field of anti-seepage protective materials, in particular to a high-toughness high-molecular flexible auxiliary anti-seepage protective material and a preparation method thereof, and the high-toughness high-molecular flexible auxiliary anti-seepage protective material comprises a component A and a component B, the component A at least comprises the following preparation raw materials: first polyol, a chain extender, diisocyanate and an anti-aging agent, the mass ratio of the diisocyanate in the component A is 22-35%, and the mass ratio of the anti-aging agent in the component A is 0.1-1%; the first polyhydric alcohol is prepared from poly (neopentyl glycol adipate)-1, 6-hexanediol ester glycol, hydrogenated castor oil polyether polyol, polytetrahydrofuran glycol and polyfunctional polyether polyol, and the second polyhydric alcohol is prepared from poly (neopentyl glycol adipate)-1, 6-hexanediol ester glycol, hydrogenated castor oil polyether polyol, polytetrahydrofuran glycol and polyfunctional polyether polyol; the chain extender is prepared from dipropylene glycol and methyl propylene glycol; the component B is prepared from the following raw materials: second polyol, a plasticizer, a filler and an amine catalyst, and is subsequently coated on the surfaces of base materials such as asphalt concrete and concrete to isolate a bottom structure from the external environment, so that the effects of isolation, seepage prevention, protection, insulation, flame retardance and the like are achieved.

The present disclosure relates to a flexible multi-layered material. An embodiment consistent with the disclosure has a plurality of poly(vinyl chloride)—PVC—layers, wherein at least one of the plurality of PVC layers is a foam layer, wherein each of the layers of the plurality of PVC layers comprises up to 60% (w / w) of a phthalate-free plasticizer, and wherein the phthalate-free plasticizer is selected from the group consisting of: phosphate, trimellitate, adipate, citrate, sebacate, polyester, vegetable oil, and mixtures thereof, and wherein the solubility of the phthalate-free plasticizer in the PVC is at least 13 (J·cm−3)1 / 2.

The application belongs to the technical field of plastics, and particularly relates to a degradable antibacterial plastic packaging bag and a preparation method thereof. The degradable antibacterial plastic packaging bag comprises the following raw materials in parts by weight: polycaprolactone 70-90 parts; polybutylene adipate terephthalate 20-40 parts; Cr and Cu co-modified ZIF-8 5-20 parts; and cerium oxide tannic acid material 2-6 parts. The Cr and Cu co-modified ZIF-8 synergistically improves the antibacterial performance of the packaging bag, and the addition of the cerium oxide tannic acid material further improves the antibacterial performance of the packaging bag. Moreover, the degradable antibacterial plastic packaging bag prepared by the application has excellent mechanical properties.

The invention provides a method for synthesizing diethyl adipate through dynamic covalent chemical regulation. Comprising the following steps: S1, sequentially adding 80-120g of adipic acid, 160-240mL of absolute ethyl alcohol, 5-8g of a difunctional dynamic regulation and control carrier, 2-4g of a ternary composite catalyst, 1-2g of a synergistic additive and 100-150mL of a mixed solvent consisting of cyclohexane and methylbenzene into a 500mL four-neck flask provided with a thermometer, a water segregator and a pH sensor, and adjusting the initial pH value to 8.0-8.5; stirring and reacting for 6 to 8 hours at the rotating speed of 450 to 500r / min under the condition of 70 to 75 DEG C; and S2, after the reaction is finished, cooling to 25 DEG C, separating and recovering the bifunctional dynamic regulation and control carrier and the ternary composite catalyst, introducing CO2 into the filtrate to regulate the pH value to 5.0-5.5, releasing the captured moisture, and carrying out reduced pressure distillation under the conditions of 80-90 DEG C and-0.08 MPa to obtain diethyl adipate. By means of the rare earth ion-carbon quantum dot-ionic liquid ternary composite catalyst, efficient catalysis under the strong acid-free condition is achieved, and the catalyst recovery rate and the product purity are greatly improved.

The invention relates to the field of processing of full-biodegradable high polymer materials, in particular to a weather-resistant master batch and a preparation method and application thereof, and the weather-resistant master batch comprises the following components: 40-70 parts by weight of poly (butylene adipate-co-terephthalate); 10 to 20 parts of polylactic acid; 20-40 parts by weight of a supported ultraviolet absorbent; 15-25 parts by weight of modified talcum powder; 1-3 parts by weight of a light stabilizer; 1-3 parts by weight of a lubricant; 1-3 parts by weight of an antioxidant; the invention discloses a degradable mulching film and a preparation method thereof.The degradable mulching film is prepared from, by weight, 1-3 parts of a supported ultraviolet absorbent, 1-3 parts of modified talcum powder and 1-3 parts of a chain extender, the degradable mulching film comprises weather-proof master batches and poly (adipic acid) / butylene terephthalate, and the mass ratio of the weather-proof master batches to the poly (adipic acid) / butylene terephthalate is (5-15): (85-95). The ultraviolet aging resistance of the degradable mulching film is further improved.

The invention discloses a modified polylactic acid high-temperature-resistant degradable composite material and a preparation method thereof, and relates to the technical field of degradable materials. The modified polylactic acid high-temperature-resistant degradable composite material at least comprises the following raw materials in parts by mass: 70-80 parts of polylactic acid; 15 to 25 parts by mass of a lignin-polylactic acid-polycaprolactone block copolymer; 5 to 10 parts by mass of poly (butylene adipate-co-terephthalate); 2-5 parts by mass of stearic acid modified nano silicon dioxide; 0.3 to 0.8 part by mass of an anti-hydrolysis agent; and 0.2 to 0.5 part by mass of an antioxidant. According to the prepared modified polylactic acid high-temperature-resistant degradable composite material, the mechanical property and the high temperature resistance of the polylactic acid composite material are improved, the degradation rate can be regulated and controlled through the proportion of all the components, and the use requirements of different scenes are met.

The invention discloses a method for preparing poly (butylene adipate-co-terephthalate) by a one-step method. The method comprises the steps of terephthalic acid esterification, adipic acid esterification, secondary esterification of terephthalic acid esterification liquid and adipic acid esterification liquid, and condensation polymerization, wherein terephthalic acid esterification and adipic acid esterification are synchronously carried out; in the terephthalic acid esterification process, a catalyst and a heat stabilizer are mixed and heated to obtain a mixed catalyst, and after terephthalic acid esterification reaction generates water, the mixed catalyst is added into a reaction system in a manner of feeding under the liquid level, so that on one hand, hydrolysis of the catalyst is reduced, and the catalytic efficiency of the catalyst is improved; on the other hand, the heat exchange efficiency is reduced and the energy consumption is increased due to the fact that a catalyst hydrolysis product covers a heat exchange pipeline; under the condition of not supplementing a catalyst, the synthesized product with qualified indexes such as PBAT melt index, color value, terminal carboxyl group and the like can be realized through subsequent secondary esterification and polycondensation.

The invention discloses a high-elastic material for an anti-slip sole and a preparation method of the high-elastic material in the field of high polymer materials. The high-elastic material is prepared from the following raw materials: modified polyurethane, modified silicone rubber, calcium carbonate, dicumyl peroxide, 2-mercaptobenzothiazole, N-isopropyl-N '-phenyl p-phenylenediamine and naphthenic oil. Wherein the modified polyurethane is prepared by the following steps: carrying out vacuum dehydration on polybutylene adipate, reacting with toluene diisocynate to prepare an isocyanate-terminated prepolymer, adding dimethylolpropionic acid, triethylamine and deionized water to obtain a water-based dispersion, and carrying out graft copolymerization on the water-based dispersion, methyl methacrylate and the like; the preparation method comprises the following steps: preheating modified polyurethane, mixing with modified silicone rubber at a high speed, adding calcium carbonate and naphthenic oil, carrying out double-roller open milling and thin-passing, adding a vulcanizing agent and the like, carrying out overturning milling, and carrying out flat plate vulcanization molding. The material is used for anti-skid soles, and has the advantages of high elasticity, lasting skid resistance and excellent weather resistance.

The invention relates to the technical field of organic synthesis, and particularly discloses a synthesis method of bis-diglycerol polyacyl adipate-2, which comprises the following synthesis steps: S1, stirring and mixing isostearic acid, caprylic capric acid, stearic acid and 12-hydroxystearic acid to obtain total fatty acid; s2, stirring and mixing dipolyglycerol, adipic acid, total fatty acid and an organic tin catalyst, and starting to heat; s3, the initial reaction temperature is controlled to be 140-150 DEG C, the reaction vacuum degree is 0.04 MPa, the heating rate is controlled to be 2-10 DEG C / h in the reaction process, the temperature is increased to 190-210 DEG C, then the reaction vacuum degree is converted into 0.1 MPa, and the heat preservation reaction is conducted for 4-10 h; after the reaction is completed, sampling and measuring an acid value; and S4, after the acid value reaches the standard, carrying out heat preservation reaction for 2-5 hours under a high-vacuum condition, cooling, and filtering to obtain the product. The organic tin catalyst is used, the esterification period is shortened, the conversion rate is increased, and the production cost is reduced.

The invention discloses a jacquard vamp material based on bio-based degradable polylactic acid (PLA) and a preparation method thereof, and relates to the technical field of shoe materials. The jacquard vamp material is of a three-layer jacquard structure formed by integrally weaving PLA composite filaments through a jacquard warp knitting machine. The PLA composite filament is prepared from the following raw materials in parts by weight: 80-95 parts of polylactic acid (PLA) slices, 5-15 parts of poly (butylene adipate / terephthalate) (PBAT), 3-8 parts of a flexibilizer, 1-3 parts of a compatilizer, 0.5-2 parts of an anti-hydrolysis agent and 0.5-1.5 parts of a lubricant. According to the invention, the bio-based PLA is used as a main raw material and is matched with degradable auxiliaries such as PBAT, so that the whole vamp material can be completely biodegraded under a composting condition, the problem of environmental pollution of a traditional vamp is fundamentally solved, and meanwhile, through blending modification of PBAT and the flexibilizer, the flexibility and impact resistance of the PLA material are remarkably improved, and the vamp material has good application prospects. The requirements of the vamp material on softness, wear resistance and durability can be met.

The invention discloses a modified polylactic acid composite material and application thereof. The modified polylactic acid composite material comprises the following raw materials in percentage by weight: 15-50% of polylactic acid; 15 to 50% of poly (butylene succinate); 15 to 50% of poly (butylene adipate-co-terephthalate); 1-5% of a compatibilizer; 0.1-1% of an antioxidant; 0.1-5% of a release agent; 0.1-1% of a melt flow regulator; 0.1-5% of a nucleating agent; 0.1-1% of an anti-hydrolysis agent; wherein the compatibilizer comprises an elastomer containing an epoxy group, an elastomer containing a maleic anhydride group, an ethylene-methyl acrylate random copolymer and an ethylene-butyl acrylate copolymer, and the weight ratio of the elastomer containing the epoxy group to the elastomer containing the maleic anhydride group is 1: 4-4: 1. The modified polylactic acid composite material has good fluidity and mechanical properties, and is suitable for preparing the cable tie by adopting an injection molding mode.

The invention relates to the technical field of biodegradable high polymer materials, in particular to a tear-resistant high-barrier biodegradable mulching film and a preparation method thereof, and the tear-resistant high-barrier biodegradable mulching film is prepared from the following raw materials in parts by weight: 60-90 parts of poly (butylene adipate-co-terephthalate); 10 to 40 parts of poly (propylene carbonate); 0.5-5 parts of a plasticizer; 0.05 to 0.3 part of a cross-linking agent; 0.1 to 10 parts of talcum powder; 0.1 to 2 parts of a lubricant; 0.1-1 part of an anti-blocking agent; 0.1 to 1 part of an antioxidant; 0.1 to 1 part of an anti-ultraviolet agent; 0.1-1 part of a light stabilizer; 0.1 to 1 part of an anti-hydrolysis agent; 0.1-1 part of a nucleating agent; the plasticizer is poly (1, 2-propylene glycol adipate); and the cross-linking agent is 1, 4-bis (tert-butylperoxy) diisopropyl benzene. The film has good mechanical properties and water vapor transmission amount, can be completely biodegraded, and has good aging resistance.

The invention relates to a fully-degradable PLA composite material with ceramic characteristics and a preparation method thereof. The fully-degradable PLA composite material is prepared from the following raw materials in percentage by weight: 25-45% of PLA, 5-13% of PBS, 48-60% of a filling agent and the balance of a processing aid, the filler is obtained by modifying an inorganic filler through a modifier; the modifier is prepared from methyl hydrogen-containing polysilazane and a bio-based maleic anhydride graft; the bio-based maleic anhydride graft is a composition of one or more of maleic anhydride grafted poly (butylene adipate-co-terephthalate), maleic anhydride grafted polyvinyl alcohol and octenyl succinic anhydride modified starch. Through the synergistic effect of the inorganic components of the filling agent, the proportion of PLA / PBS and the modifier, the filling agent has the advantages that the filling effect is good; the material is matched with the use requirement of the ceramic flying saucer on key indexes, and all components have bio-based or degradable characteristics, so that the dual targets of'ceramic performance bionics' and'environment-friendly controllable degradation 'are achieved.

The invention belongs to the technical field of degradable packaging materials, and discloses a preparation method of a degradable preservative film. The anti-fog antibacterial plastic is prepared from the following raw materials in parts by weight: 40 to 45 parts of poly (butylene adipate-co-terephthalate) (PBAT), 8 to 12 parts of polylactic acid (PLA), 28 to 32 parts of modified structural starch, 4 to 6 parts of poly (butylene carbonate) (PBC), 4 to 6 parts of talcum powder, 0.4 to 0.6 part of aluminate, 0.8 to 1.2 parts of a composite antibacterial agent and 2.5 to 3.5 parts of anti-fog master batch. The invention aims to overcome the defects in the prior art, and provides the degradable preservative film and the preparation method thereof, the preservative film not only has good degradability and mechanical properties, but also has excellent antibacterial and antifogging effects, and the preparation process is simple and easy for industrial production.

The invention discloses a degradable high-strength plastic bag and a preparation method thereof, and relates to the technical field of plastic bag preparation. The degradable high-strength plastic bag at least comprises the following raw materials in parts by mass: 40-60 parts of polylactic acid, 20-35 parts of poly (adipic acid) / butylene terephthalate, 5-15 parts of modified nano calcium carbonate, 3-8 parts of modified wood fibers, 6-8 parts of chitosan grafted polyglycidyl methacrylate nanoparticles, 0.5-2 parts of a lubricant, 0.3-1 part of an antioxidant and 2-5 parts of a degradation accelerator. And 0.5 to 1.5 parts of an ultraviolet stabilizer. According to the degradable high-strength plastic bag prepared by the preparation method disclosed by the invention, the polylactic acid and the poly (butylene adipate-co-terephthalate) are used as base materials, the modified nano calcium carbonate and the modified fibers are used as fillers, and the chitosan grafted polyglycidyl methacrylate nanoparticles are used as a compatilizer, so that the balance of high strength and degradability is realized; the prepared degradable high-strength plastic bag can be used as a high-performance flexible packaging material.