35 results about "Dibasic ester" patented technology

A hard surface cleaning composition comprising: (a) 0.1 to 60 wt % of a surfactant system; (b) 0.1 to 40 wt % of a solvent, wherein the solvent is selected from the group consisting of a lower alkanol, a benzyl alcohol, a lower alkyl ether, a glycol, an aryl glycol ether, a lower alkyl glycol ether, a glycerol ketal, an ester, a hydrocarbon / ester blend, a dibasic ester, a linear alcohol ethoxylate, a branched alcohol, oxo alcohol ethoxylate, and combinations thereof; and (c) optionally 0.001 to 10 wt % of a lipase.

The application discloses an electronic skin-oriented conductive silver paste and a preparation method and application thereof, and relates to the technical field of flexible printed electronic materials.The raw materials of the electronic skin-oriented conductive silver paste include flaky silver powder, silver nanoparticles, thermoplastic polyurethane elastomer, acrylic elastomer, PEDOT:PSS microgel dispersion, (3-glycidylpropoxy)trimethoxysilane, polydiallyldimethylammonium chloride, hexanedial modified dopamine copolymer, (3-aminopropyl)triethoxysilane, methacryloyloxypropyltrimethoxysilane, cellulose acetate, modified polyurea thixotropic agent, hydrogenated castor oil, ethylene glycol ether acetate, dibasic acid ester, leveling agent and water.The electronic skin-oriented conductive silver paste has the advantages of good electrical performance, good mechanical-electrical stability, good anti-electromigration and sweat corrosion resistance, and can still maintain dendrite-free and low drift under long-term coupling of sweat and bias, and is suitable for electronic skin.

The invention discloses a preparation method of heat-resistant bisphenol A type copolycarbonate, and belongs to the technical field of polycarbonate synthesis. Comprising the following steps: by taking bisphenol A and diester carbonate as monomers, aromatic dibasic acid, aromatic dibasic acid ester or aromatic dihydroxy compound as a copolymerization unit and imidazole ionic liquid as a catalyst, carrying out transesterification under a protective atmosphere, and then carrying out condensation polymerization under a vacuum condition to obtain the heat-resistant bisphenol A type copolycarbonate. A metal-free catalyst is used for carrying out melt polycondensation on bisphenol A type copolycarbonate, so that efficient polymerization and heat-resistant modification of polycarbonate are realized. The performance of the copolycarbonate is regulated and controlled by controlling the type and proportion of the added copolymerization units, so that the glass-transition temperature is increased while the mechanical properties and optical properties of the bisphenol A polycarbonate are retained.

A ceramic scintillator array 1 according to an embodiment of the present invention is provided with a plurality of scintillator segments 2 and a reflective layer. The reflective layer contains a resin composition. The resin composition contains a transparent resin and an additive. Dibasic acid esters serve as the additive.

The invention belongs to the technical field of electronic paste, and particularly relates to silver-nickel paste for a radio frequency identification antenna and a preparation method of the silver-nickel paste. The silver-nickel paste comprises the following components in percentage by mass: 50-60% of conductive metal powder, 5-20% of polymer resin and a solvent, the conductive metal powder comprises first-stage powder, second-stage powder and third-stage powder, the particle size D50 of the first-stage powder, the particle size D50 of the second-stage powder and the particle size D50 of the third-stage powder are decreased step by step, the first-stage powder is nickel powder, and the second-stage powder and the third-stage powder are silver powder; the conductive metal powder comprises nickel powder and silver powder; the macromolecular resin comprises vinyl chloride-vinyl acetate resin and polyester resin; the solvent is dibasic acid ester. The silver-nickel paste capable of replacing pure silver conductive paste is firstly provided, on one hand, the material cost of the radio frequency identification antenna printing paste is reduced, and on the other hand, the particle size design and metal model selection are combined to optimize the conductive performance after nickel replacement.

The invention relates to the technical field of foam materials, in particular to an interpenetrating network cross-linked polyvinyl chloride foam material and a preparation method thereof. Comprising the following components in parts by weight: 60-70 parts of polyvinyl chloride resin, 3-7 parts of dibasic acid ester, 30-40 parts of isocyanate, 5-10 parts of a physical foaming agent, 1.5-3 parts of water, 1-3 parts of a nucleating agent, 0.1-0.3 part of a foam stabilizer, 0.5-1 part of a catalyst, 0-10 parts of hollow glass microspheres and 0.5-5 parts of a processing aid, the physical foaming agent is supercritical gas, and the air pressure is 8.5-15 MPa. The one-step mould pressing supercritical foaming process is adopted, the process is simple, the step that a foaming blank is prefabricated firstly and then cross-linked and foamed in a water area or a steam area in conventional mould pressing chemical foaming can be effectively avoided, the foaming time is short, the yield is large, and the production cost is relatively low.

The invention relates to a polyester material, a preparation method thereof and an antibacterial product. The polyester material comprises a polyester main chain and antibacterial peptide; the polyester main chain is prepared from the following raw materials: dibasic acid and / or dibasic ester and dihydric alcohol; the dibasic acid comprises terephthalic acid, and the dibasic ester comprises terephthalic acid ester; the antibacterial peptide is prepared through a ring-opening polymerization reaction of amino-acid ester-N-carboxy anhydride. According to the polyester material, the heat resistance and the optical performance are further improved while good antibacterial performance is achieved.

An EPDM composition that is a rubber composition in which ethylene-propylene-diene terpolymer rubber is compounded with carbon black, a plasticizer, and a crosslinking agent, wherein the plasticizer is a polyol ester, which is a reaction product of a neopentyl type polyol and a monocarboxylic acid, and the amount of the plasticizer in the composition is 5 to 22 wt. %. The EPDM composition has excellent effects that kneadability and processability are not impaired, and that in terms of hardness changes after a heat aging test, the resulting crosslinked product is equivalent to when the same amount of an α-olefin oligomer is compounded, and is significantly improved compared to when an aliphatic dibasic acid ester is compounded.

The present invention relates to a method for producing antibacterial polyester, an antibacterial fiber obtained by the method, and the application of the antibacterial fiber in the production of medical and surgical products. The present invention primarily addresses the drawbacks of existing antibacterial polyester fibers, such as poor washability and antibacterial performance. The present invention includes the steps of (i) esterifying a diol with a dibasic acid to obtain ester I, (ii) mixing ester I with a reactive antibacterial component and conducting a pre-polycondensation reaction to obtain a pre-polycondensation product, and (iii) conducting a final polycondensation reaction of the pre-polycondensation product to obtain an antibacterial polyester. The reactive antibacterial component is obtained by esterifying a substance represented by the following formula 3 with a diol. Q is a quaternary ammonium group containing a long-chain hydrocarbon group, the long-chain hydrocarbon group having 6 to 20 carbon atoms, and Ar is an aromatic ring. [Formula 1] JPEG2025538019000015.jpg26170

The invention provides a moisture absorption and sweat releasing antistatic finishing agent and a preparation method thereof. The antistatic finishing agent is prepared from the following raw materials: 80 to 100 parts of dibasic acid ester, 80 to 100 parts of dihydric alcohol, 24 to 30 parts of lactam monomer, 40 to 50 parts of polyethylene glycol, 0.5 to 1 part of catalyst, 8 to 15 parts of polyether-siloxane-ionic liquid terpolymer, 3 to 6 parts of graphene-zinc oxide-sodium bentonite composite powder, 3 to 8 parts of functional filler, 1 to 3 parts of dispersing aid, 0.1 to 0.3 part of defoaming agent, 0.2 to 0.5 part of antioxidant and 2 to 5 parts of coalescing agent. The moisture-absorbing and sweat-releasing antistatic finishing agent can endow the fabric with excellent moisture-absorbing and sweat-releasing properties, lasting antistatic property and washability, has an antibacterial effect, can improve the hand feeling and air permeability of the fabric, and is good in self stability.

The invention belongs to the technical field of polyester copolymerization modification, and relates to a preparation method of block polyester-polycarbonate, which comprises the following steps: by taking dimethyl carbonate and dihydric alcohol as raw materials, and dihydric alcohol and dibasic acid dimethyl ester or dibasic acid as raw materials, sequentially performing esterification and pre-polycondensation reaction under the action of a catalyst, thereby obtaining the block polyester-polycarbonate. The preparation method comprises the following steps: respectively obtaining a carbonic acid ester with a methoxy end group and a dibasic acid ester with a hydroxyl end group, mixing the carbonic acid ester with the methoxy end group and the dibasic acid ester with the hydroxyl end group, and carrying out final polycondensation reaction under a negative pressure condition to prepare block polyester-polycarbonate; the number-average molecular weight of the carbonate ester with the end group being methoxyl is 430-4000 g / mol; and the difference between the number-average molecular weight of the carbonate chain segment in the block polyester-polycarbonate and the number-average molecular weight of the carbonate ester with the end group being methoxyl is less than 5%. The preparation method is simple and easy to implement, and the obtained block polyester-polycarbonate is excellent in thermal performance and mechanical performance.

The application discloses an environmentally-friendly low-odor stretchable conductive silver paste and a preparation method and application thereof, and relates to the technical field of flexible printed electronic materials.The raw materials of the environmentally-friendly low-odor stretchable conductive silver paste include flaky silver powder, silver nanoparticles, a bio-based polyurethane, an acrylic elastomer, PEDOT:PSS microgel, a sulfobetaine-silane copolymer, polyquaternium-10, 1,2,4-triazole or a derivative thereof, cellulose ester, fumed silica, ethylene glycol ethyl ether acetate, dibasic acid ester, a leveling agent and water.The environmentally-friendly low-odor stretchable conductive silver paste has the advantages of low VOC emission, low odor, good skin compatibility and good chemical stability, and can still maintain dendrite-free and low drift under long-term coupling of sweat and bias voltage;the paste can be densified at a low resistance at 130 DEG C for 30 min, is friendly to printing and is suitable for roll-to-roll large-area manufacturing.

The invention discloses a modified montmorillonite-based lubricant and a preparation method thereof, and belongs to the technical field of lubricants, oleic acid and diethylenetriamine are cyclized and quaternized to prepare an oleic acid-based imidazoline quaternary ammonium salt corrosion inhibitor, the oleic acid-based imidazoline quaternary ammonium salt corrosion inhibitor is used for organic modification of nano montmorillonite, a silane coupling agent is further adopted for silanization treatment, and the modified montmorillonite-based lubricant is prepared. The preparation method comprises the following steps: preparing silane modified corrosion-inhibition montmorillonite, carrying out in-situ polymerization coating by taking a urea-formaldehyde prepolymer as a wall material to form montmorillonite modified corrosion-inhibition microcapsules, and carrying out copolymerization on acrylic acid, N, N-bis (2-hydroxyethyl) aminomethylene diethyl phosphonate and trifluoromethacrylate to obtain the modified polyacrylate dispersant with heat-resistant and dispersion-stable functions. The microcapsule, a dispersing agent, dibasic acid ester oil, PAO base oil and an antioxidant are compounded in proportion to form the modified montmorillonite-based lubricant.

The invention discloses conductive silver paste for electronic skin as well as a preparation method and application of the conductive silver paste, and relates to the technical field of flexible printing electronic materials. The conductive silver paste for the electronic skin comprises the following raw materials: flake silver powder, silver nanoparticles, a thermoplastic polyurethane elastomer, an acrylic elastomer, a PEDOT: PSS microgel dispersion, (3-glycidyl propoxy) trimethoxysilane, poly (diallyldimethylammonium chloride), an adipic dialdehyde modified dopamine copolymer, (3-aminopropyl) triethoxysilane, a crosslinking agent, a coupling agent and a solvent. The coating is prepared from methyl acryloyloxy propyl trimethoxy silane, cellulose acetate, a modified polyurea thixotropic agent, hydrogenated castor oil, ethylene glycol monoethyl ether acetate, dibasic acid ester, a flatting agent and water. The conductive silver paste for the electronic skin has the advantages of being good in electrical property, mechanical-electrical stability, electromigration resistance and sweat corrosion resistance, can still keep no dendrite and low drift under long-term coupling of sweat and bias voltage, and is suitable for the electronic skin.

The present application belongs to the technical field of polyester copolymerization modification, and relates to a preparation method of block polyester-polycarbonate. Dimethyl carbonate and dihydric alcohol are used as raw materials, and dihydric alcohol and dimethyl dicarboxylate or dicarboxylic acid are used as raw materials. Under the action of a catalyst, esterification and pre-polycondensation reactions are sequentially performed to obtain carbonate esterification products with methoxy end groups and dicarboxylic acid esterification products with hydroxyl end groups, respectively. The carbonate esterification products with methoxy end groups and the hydroxyl-terminated dicarboxylic acid esterification products are mixed and subjected to final polycondensation reaction under negative pressure to obtain block polyester-polycarbonate. The number average molecular weight of the carbonate esterification products with methoxy end groups is 430-4000 g / mol. The number average molecular weight of the carbonate segment in the block polyester-polycarbonate and the number average molecular weight of the carbonate esterification products with methoxy end groups differ by less than 5%. The preparation method is simple and easy to implement, and the obtained block polyester-polycarbonate has excellent thermal and mechanical properties.

The primer composition comprises a polyacrylate dissolved or dispersed in water. The polyacrylate comprises at least 20% by weight of methyl methacrylate units, at least 15% by weight of monomer units comprising at least one of secondary amines, tertiary amines, or tertiary amides, at least 15% by weight of acrylic monomer units comprising an alkyl group having at least four carbon atoms, and 2.5% to 10% by weight of acrylic monomer units comprising a carboxylic acid group. The primer composition comprises a polymer dispersed in water and a solvent, wherein water accounts for 50% by weight or more of the primer composition, and the solvent comprises at least one of propylene carbonate, polyol, polyol ether, polyol ether ester, or dibasic acid ester. The adhesive system comprises the primer composition and an adhesive tape. Furthermore, a method for producing the bonded article is also described.

The application discloses a kind of transparent environmental protection intrinsic flame-retardant epoxy resin material and preparation method and application thereof.The intrinsic flame-retardant epoxy resin material is prepared by high-temperature melting method according to certain proportion by isocyanuric acid triglycidyl ester and dicarboxylic acid, acid anhydride or diacid ester reaction.The obtained intrinsic flame-retardant epoxy resin material flame-retardant function is mainly given by isocyanurate ring, with it as the main structure of material, can make material have excellent thermal stability, mechanical property and halogen-free flame-retardant performance;Flexible fatty chain introduced by curing agent and ester group produced by reaction, so that the material has excellent toughness and environmental protection degradable performance;The application combines bulk melting reaction and casting forming process, and can prepare highly transparent and arbitrary shape, with intrinsic halogen-free flame-retardant function, environmental protection degradable high-performance thermosetting resin, which can be used as environmental protection flame-retardant organic glass in building, transportation, aviation, home, electronic and other industries, and has wide application prospect.

A primer composition, the primer composition comprising a polyacrylate dissolved or dispersed in water. The polyacrylate comprises at least (20) wt% of methyl methacrylate units, at least (15) wt% of monomeric units comprising at least one of a secondary amine, a tertiary amine, or a tertiary amide, at least (15) wt% of acrylic monomeric units having an alkyl group comprising at least four carbon atoms, and an acrylic monomer unit having a carboxylic acid group in an amount of 2.5 wt% to 10 wt%. A primer composition comprising a polymer dispersed in water and a solvent wherein the water comprises at least (50) wt% of the primer composition and the solvent comprises at least one of propylene carbonate, a polyol, a polyol ether, a polyol ether ester, or a dibasic ester. An adhesive system includes a primer composition and an adhesive tape. A method of making a bonded article is also described.

The invention discloses environment-friendly low-odor stretchable conductive silver paste and a preparation method and application thereof, and relates to the technical field of flexible printing electronic materials. The environment-friendly low-odor stretchable conductive silver paste is prepared from the following raw materials: flake silver powder, silver nanoparticles, bio-based polyurethane, an acrylic elastomer, PEDOT: PSS microgel, a sulfobetaine-silane copolymer, polyquaternium-10, 1, 2, 4-triazole or a derivative thereof, cellulose ester, fumed silica, ethylene glycol monoethyl ether acetate, dibasic acid ester, a flatting agent and water. The environment-friendly low-odor stretchable conductive silver paste disclosed by the invention has the advantages of low VOC emission, low odor, good skin compatibility and good chemical stability, and can still keep no dendrite and low drift under long-term coupling of sweat and bias voltage; low-resistance densification can be achieved at 130 DEG C for 30 min, printing is friendly, and the method is suitable for roll-to-roll large-area manufacturing.

The present invention provides a ceramic scintillator array that can suppress the decrease in optical output after prolonged X-ray irradiation. [Solution] The ceramic scintillator array 1 of the embodiment comprises a plurality of scintillator segments 2 and a reflective layer. The reflective layer contains a resin composition. The resin composition contains a transparent resin and an additive. The additive is a dibasic acid ester.

The invention belongs to the technical field of base oil preparation, and provides bio-based polyol base oil and a preparation method thereof. The preparation method comprises the following steps: firstly, modifying polypropylene glycol by utilizing epoxidized soybean oil through catalysis of Lewis acid to prepare an epoxidized soybean oil modified polyether component; meanwhile, bio-based azelaic acid and branched chain alcohol are subjected to a high-temperature esterification reaction under the action of a catalyst, and a dibasic acid ester component with excellent low-temperature performance is prepared; in addition, citric acid is taken as a core framework and firstly reacts with oleyl alcohol to form an oil-soluble main body, then a benzoyl group is grafted and substituted by utilizing a hydroxyl site in the center, and finally an anti-wear metal passivation functional group containing a sulfur and nitrogen heterocyclic ring is introduced into a side chain through a thiol-ene reaction; the epoxidized soybean oil modified polyether, dibasic acid ester, a multifunctional additive and poly-alpha-olefin base oil are compounded, homogenized and blended to obtain a target product, and the prepared base oil has the advantages of a bio-based source and high-performance synthetic oil and has good lubricity and environmental friendliness.

Provided is a radiative cooling device that is flexible, has increased weather resistance, and can be produced at a low cost. The radiative cooling device includes: an infrared radiative layer A having a radiative surface H for radiating infrared light IR; and a light reflective layer B on a side of the infrared radiative layer A, which is opposite to the radiative surface H. The infrared radiative layer A is a resin material layer J having a thickness adjusted so that the resin material layer emits heat radiation energy greater than absorbed solar energy in a wavelength range from 8 μm to 14 μm. The resin material layer J includes a vinyl chloride-based resin as a resin material in which a plasticizer is mixed. The plasticizer is any of phthalic acid esters, aliphatic dibasic acid esters, and phosphoric acid esters.

The invention belongs to the technical field of polymers, and relates to high-molecular-weight 3-hydroxybutyric acid copolyester as well as a preparation method and application thereof. The invention discloses a preparation method of high-molecular-weight 3-hydroxybutyric acid copolyester, which comprises the following steps: (1) mixing 3-hydroxybutyric acid / ester and cyclic anhydride in a molar ratio of 1: (1-1.5), and reacting at a first reaction temperature of 20-140 DEG C for 1-10 hours to obtain a bifunctional monomer; and (2) under the action of a catalyst, mixing the bifunctional monomer, aromatic dibasic acid / ester, aliphatic dicarboxylic acid / ester and dihydric alcohol, carrying out esterification reaction at a second reaction temperature of 150-180 DEG C for 1-12 hours, heating to a third reaction temperature of 185-260 DEG C, and carrying out condensation polymerization for 1-24 hours to obtain the high-molecular-weight 3-hydroxybutyric acid copolyester with the structure as shown in the formula 1, the number-average molecular weight of the 3-hydroxybutyric acid copolyester with high molecular weight is greater than 20 kg / mol. The application potential of the high-molecular-weight 3-hydroxybutyric acid bio-based copolyester in the high-value fields of biomedical materials, degradable packaging and the like is expanded.

The invention discloses a solid form of ascorbic acid carbon chain dibasic acid ester and application thereof. Specifically, the X-ray powder diffraction pattern of the ascorbic acid carbon chain dibasic acid ester in the solid form has the following characteristic peaks expressed by angle 2 theta: 7.2 + / -0.2 degrees, 14.1 + / -0.2 degrees, 18.5 + / -0.2 degrees, 18.7 + / -0.2 degrees, 19.8 + / -0.2 degrees, 22.4 + / -0.2 degrees, 23.9 + / -0.2 degrees and 25.4 + / -0.2 degrees.

The present application relates to the technical fields of chemical synthesis equipment, in particular to a kind of binary ester continuous synthesis reaction device, including vertical reaction tower body and multistage reaction unit;Each stage reaction unit includes reaction chamber, liquid distribution assembly, reaction assembly, overflow assembly, the reaction chamber is the chamber enclosed by horizontal partition and tower body inner wall, the liquid distribution assembly is set to the top of reaction chamber, the reaction assembly is set to the inside of reaction chamber, the overflow assembly is set to the rear end of reaction chamber;Multiple reaction chambers are fixedly connected with flow guide cylinder, the flow guide cylinder is provided with heat conduction component, and the reaction chamber is fixedly connected with inlet pipe and outlet pipe.The present application can realize binary ester continuous synthesis and heat cascade utilization, support catalyst online replacement, effectively improve production efficiency and product quality stability.

The invention discloses a fabric material, a preparation method thereof and a preparation method of fabric. The fabric material comprises a skin layer and a core layer wrapped in the skin layer, and the melting point of the skin layer is lower than that of the core layer; the raw materials of the skin layer comprise a first fiber polymer and an ester polymer, the melting point of the first fiber polymer is 110-180 DEG C, and the main chain of the ester polymer comprises an aliphatic dibasic acid ester group chain segment. In this way, on the basis that no loose edges exist after the fabric is cut, the softness and rebound resilience of the fabric can be improved.

A continuous polymerization method for nylon. Polymerization starting materials comprise, in parts by mass, 5-60 parts of polymerization monomer dibasic acid and / or dibasic acid ester, 3-50 parts of diamine, and 10-90 parts of reactive dispersion medium polyamide. Polymerization steps comprise: continuously adding the polymerization starting materials into a material mixing device in proportion, so that the raw materials are mixed and reacted in the material mixing device to form a continuously conveyed melt, and reacting the evenly dispersed melt in a subsequent polymerization device until nylon is polymerized to reach a required molecular weight. The method is an efficient and environment-friendly polymerization method for nylon.

The invention belongs to the technical field of liquid cooling, and particularly relates to a modified nanometer heat conduction filler, a heat management nanofluid and a preparation method and application thereof. The modified nano heat-conducting filler has a core-shell structure and comprises an inner core and a shell layer coating the surface of the inner core, the inner core is nano heat-conducting particles, the shell layer comprises an inner layer, a middle layer and an outer layer which are arranged from inside to outside, both the inner layer and the outer layer are oleic acid, and the middle layer is a silane coupling agent containing double bonds; the thermal management nanofluid comprises the following components in parts by mass: 80-95 parts of dibasic acid ester; 6 to 18 parts of synthetic hydrocarbon oil; and 1.5-3.5 parts of a modified nano heat-conducting filler. The modified nano heat-conducting filler has good dispersion stability in the heat management nano fluid and is not easy to deposit, so that the formation of a heat-conducting path is facilitated, and the heat-conducting property of the heat management nano fluid is improved. Meanwhile, the thermal management nanofluid disclosed by the invention also has good flowability and meets the flowing requirement.

To provide a luster paint, a luster coating film, a luster laminated coating film, and a coated article that enable securing luster even with a comparatively small amount of indium particles incorporated.SOLUTION: A luster paint comprising scaly indium particles, a plasticizer, and a solvent, wherein the scaly indium particles are contained in an amount of 20 to 70 wt.% per 100 wt.% of solid content of the luster paint, and the plasticizer is an aliphatic dibasic acid ester and is contained in an amount of 10 to 85 wt.% per 100 wt.% of solid content of the luster paint.SELECTED DRAWING: None

The invention belongs to the technical field of polymers, and relates to a degradable lactic acid copolyester elastomer as well as a preparation method and application thereof. The invention discloses a preparation method of a degradable lactic acid copolyester elastomer, which comprises the following steps: mixing aromatic dibasic acid / ester, aliphatic / alicyclic dihydric alcohol, micromolecular polyhydric alcohol and lactate with carboxyl terminal according to a molar ratio of (0.1-2): 1: (0-0.02): (0.1-2), adding a catalyst, heating for 1-10 hours at a first reaction temperature of 150-190 DEG C, and reacting for 1-2 hours at a second reaction temperature of 150-190 DEG C to obtain the degradable lactic acid copolyester elastomer. And then heating to a second reaction temperature of 200-250 DEG C, vacuumizing to 10-200 Pa, and reacting for 1-12 hours to obtain the degradable lactic acid copolyester elastomer, the molar content of the succinic acid lactate ester in the degradable lactic acid copolyester elastomer is 30-70%, and the crosslinking degree is 0.3-0.9%. The degradable lactic acid copolyester elastomer is applied to the polylactic acid composite material, so that the mechanical property of a polylactic acid base material can be effectively improved.