47 results about "Aging property" patented technology

The invention relates to the technical field of high polymer materials, in particular to a polyethylene flame-retardant master batch and a production process thereof. The polyethylene flame-retardant master batch is prepared from the following raw materials in parts by weight: 50 to 60 parts of polyethylene, 10 to 20 parts of hydroxymethyl phosphinic acid, 15 to 20 parts of HDPE-g-MAH, 0.8 to 1.5 parts of an initiator, 1 to 2 parts of an antioxidant and 3 to 6 parts of functional particles. The polyethylene is selected from high-density polyethylene, and the melt index of the polyethylene is 7-20g / 10min under the conditions of 190 DEG C and 2.16 kg; the polyethylene flame-retardant master batch produced by the invention not only can effectively enhance the flame retardant property of a polyethylene product, but also can effectively improve the anti-aging property of the polyethylene product; and the service life of the polyethylene product is prolonged to a certain extent while the quality of the polyethylene product is ensured.

The present disclosure relates to phosphonic acids for enhancing the performance of thermal interface materials. Specifically, the present invention relates to the use of phosphonic acid for enhancing the performance of thermal interface materials (generalized, composites), for example by improving rheological properties, improving aging properties, improving shelf life, improving stickiness / adhesion, and / or reducing diffusion of materials (if any) migrating therefrom (e.g., reduced diffusion of oil exudate, etc. The present disclosure also relates to methods of enhancing the performance of composites for managing thermal and / or electromagnetic interference (EMI) using phosphonic acid. The composites may include thermal management and / or electromagnetic interference (EMI) mitigation materials, such as thermal interface materials (TIMs), EMI absorber materials, thermally conductive EMI absorber materials, electrically conductive materials, combinations thereof, etc.

This invention relates to the field of polymer materials technology, specifically to a UV-resistant reinforced and toughened PPS material and its preparation method. The invention involves mixing PPS, a toughening agent, a reinforcing agent, a silane coupling agent, an anti-aging composite material, an anti-aging material, and additives to obtain a mixture. This mixture is then melt-extruded, water-cooled, air-cooled, and pelletized to obtain a finished PPS material. The finished product prepared by this invention possesses excellent anti-aging properties and mechanical properties, thus having broad application prospects in the field of polymer materials technology.

The present application relates to the technical field of high polymer, in particular to a kind of anti-aging high-performance composite material and its injection molding process.The acidized spirocyclic phosphate is prepared by adding phosphorus oxychloride, pentaerythritol and formic acid.A kind of composite flame retardant is prepared by mixing reaction of acidized spirocyclic phosphate, phosphorus heteroheptacyclo-acrylamide double bond derivative, phosphorus heteroheptacyclo-allyloxy double bond derivative and phosphorus hetero-link-benzenediol diallyl double bond derivative.Then, high-performance composite material is obtained by adding polypropylene, acrylonitrile-butadiene-styrene copolymer, compatibilizer, inorganic filler, antioxidant, anti-aging agent, composite flame retardant and lubricant, and by melt extrusion and granulation.The high-performance composite material is injection molded to obtain finished product.The finished product prepared by the present application has good flame retardancy, anti-aging property and mechanical property, so it has wide application prospect in the technical field of high polymer.

The present application relates to the technical field of PE blown film, and particularly relates to a high-toughness anti-aging PE blown film and a preparation method thereof.The present application takes PE resin as a base material, and is compounded with a repair capsule, a modified carbon nanotube agent and a hexagonal boron nitride additive agent.Through synergistic effect of the three layers of functional components, the problems of poor interface compatibility, agglomeration, decreased toughness and barrier property, weak self-repairing and anti-aging performance, poor water resistance stability and the like of the traditional PE blown film after adding inorganic flame retardant are solved.The repair capsule gives the film the self-repairing ability for cracks and scratches, and the modified carbon nanotube agent and the hexagonal boron nitride additive agent are coordinated to synchronously improve the toughness, flame retardancy, barrier property, anti-aging property and water resistance stability of the film, and the comprehensive performance of the product is balanced, and the product is suitable for packaging, building materials, electronic protection and other scenes with high requirements for toughness and weather resistance.

The application relates to the technical field of building materials, in particular to high-adhesion anti-aging ceramic tile glue and a preparation method thereof. The high-adhesion anti-aging ceramic tile glue comprises the following components in parts by weight: 10-50 parts of epoxy-functionalized siloxane resin, 40-60 parts of cement, 5-20 parts of hardening agent, 5-10 parts of thickening agent, 1-5 parts of antioxidant and 20-30 parts of filler; the structural formula of the epoxy-functionalized siloxane resin is shown in the description. The ceramic tile glue has excellent adhesion and anti-aging property.

The utility model discloses an anti-aging corrosion-resistant cable which comprises an outer rubber layer, an inner rubber layer is arranged inside the outer rubber layer, a positioning block is fixedly connected inside the inner rubber layer, and the center line of the inner rubber layer and the center line of the outer rubber layer are on the same vertical plane. According to the anti-aging corrosion-resistant cable, the anti-aging coating and the corrosion-resistant coating are arranged, the outer rubber layer of the cable is uniformly coated with the anti-aging coating, and the anti-aging coating has a good anti-aging effect, so that after the cable is laid, the anti-aging coating can effectively prevent the outer layer of the cable from being rapidly aged; according to the cable, the anti-aging coating is coated outside the cable, the anti-corrosion coating is coated outside the anti-aging coating, the anti-corrosion coating can effectively protect the anti-aging coating and prevent the anti-aging coating from being damaged to affect the anti-aging effect, meanwhile, the anti-corrosion coating can enhance the anti-corrosion effect of the cable, and the problem that the anti-aging effect is poor is solved.

The invention relates to the technical field of coatings, in particular to an anti-aging insulating coating and a preparation method thereof.The insulating coating is prepared from, by weight, 15-25 parts of hydroxyl-terminated polysiloxane, 2-5 parts of diluent, 0.5-3 parts of cross-linking agent, 30-35 parts of filler, 0.01-0.03 part of catalyst and 42-47 parts of solvent. The insulating paint prepared by the invention has the advantages of higher mechanical strength, favorable aging resistance and favorable insulating property.

According to the low-anisotropy hot-dip aluminum-silicon 180 MPa grade phosphorus-containing high-strength steel and the preparation method thereof, a hot-dip aluminum-silicon automobile outer plate is prepared through low-cost component design and ingenious combination of heat treatment and an aluminum-silicon plating process, the yield strength of a steel plate of the hot-dip aluminum-silicon automobile outer plate ranges from 180 MPa to 220 MPa, the tensile strength is larger than or equal to 320 MPa, the percentage elongation after fracture is larger than or equal to 43%, the plastic strain ratio r value is larger than or equal to 2.2, and the hot-dip aluminum-silicon automobile outer plate is suitable for being used as a steel plate. According to the high-strength steel and the manufacturing method thereof, the isotropic special-shaped index delta r value is smaller than or equal to 0.2, the work hardening index n value is larger than or equal to 0.23, the structure of the manufactured high-strength steel comprises ferrite, a Ti (N, C) precipitated phase, an NbC precipitated phase and a Cu-rich phase, and the automobile outer plate has excellent forming performance, high surface quality, no timeliness and small anisotropy value.

The invention discloses a preparation process of a montmorillonite and resin composite material with high barrier property, and relates to the technical field of composite materials. According to the process, four cores of directional modification of montmorillonite, precise construction of a one-dimensional-two-dimensional reinforced composite system, regulation and control of a resin matrix interface and RTM forming process collaboration are integrated, and efficient nanoscale dispersion of montmorillonite in resin and ordered orientation arrangement in the axial direction of fibers are achieved through a modifier molecular structure design and a multi-field coupling dispersion technology; meanwhile, through the precise proportion of the interface compatilizer and the gradient curing process design, the technical bottlenecks that in a traditional composite material, montmorillonite is agglomerated, the interface bonding is weak, and the barrier property and the mechanical property are difficult to consider at the same time are solved. The material has excellent high and low temperature stability and anti-aging performance, and can meet the harsh use requirements of light-weight structural members such as automobile body covering parts and gas cylinder covers. The process is environmentally friendly and efficient, the cost is controllable, and synergistic improvement of high barrier, high toughness and light weight is achieved.

The invention relates to a water-based paint for leather surface waterproofing, and belongs to the technical field of coatings. The water-based paint is prepared from the following components: 70 to 85 percent of polyethersulfone modified polyurethane-acrylate composite resin dispersion, 3 to 7 percent of a cross-linking agent, 5 to 15 percent of an anti-sticking agent, 5 to 15 percent of a cosolvent, 8 to 12 percent of a nano reinforcing material and 1 to 2 percent of amino-terminated hyperbranched polyamide. Wherein the core resin dispersion is prepared by chemically grafting sulfonated polyethersulfone to a polyurethane-acrylate skeleton. Through the unique resin chemical modification and nano-composite technology, the obtained coating has excellent waterproofness, high adhesive force, good mechanical strength and aging resistance, is especially suitable for high-requirement leather surface treatment of automotive interiors, furniture and the like, and meets the environment-friendly requirement at the same time.

The invention provides an ultralight release film as well as a preparation method and application thereof. The ultra-light release film comprises a micro-convex PET (Polyethylene Terephthalate) base film and a release layer formed by coating a release agent on the PET base film layer, the release agent is prepared from the following raw materials in parts by weight: 60 to 100 parts of organosiloxane resin A, 10 to 50 parts of organosiloxane resin B, 0.05 to 0.2 part of an inhibitor, 0.55 to 1.45 parts of a crosslinking agent containing silicon-hydrogen bonds, 0.2 to 0.5 part of an adhesion additive, 1.55 to 3.45 parts of a platinum complex catalyst and 300 to 1200 parts of an organic solvent. The anti-aging coating has the advantages of excellent anti-aging property, excellent residual adhesion rate and no powder falling risk.

The invention discloses a high-wear-resistance silicon PU (polyurethane) composite layer, a preparation method thereof and application of the high-wear-resistance silicon PU composite layer in a ball field surface layer, and particularly belongs to the technical field of organic silicon modified polyurethane. The composite layer adopts a three-layer structural design and comprises a closed priming coat, an elastic wear-resistant layer and a functional finishing coat from bottom to top; according to the elastic wear-resistant layer, modified Si3N4 / graphene composite powder, hydroxyl-terminated polybutadiene and siloxane in a component A are mixed with a component B of an isocyanate prepolymer according to the mass ratio of 1: 1.1-1.2, and the wear resistance and rebound resilience are remarkably improved; nano-zirconia dispersion liquid is introduced into the functional finishing coat to cooperate with a specific polyurethane system, so that the ageing resistance and the surface hardness are enhanced; according to the closed bottom coating, epoxy silane oligomer is used as a main body to reinforce the adhesive force of a base surface, and the composite layer has excellent wear resistance, mechanical property, aging resistance and rebound resilience.

The invention discloses a high-performance automobile sound insulation and noise reduction damping fin and a preparation method of the high-performance automobile sound insulation and noise reduction damping fin, and belongs to the technical field of damping fins. 100 to 150 parts of barium sulfate; 30 to 50 parts of polyisobutene; 5 to 20 parts of silicon dioxide; 0.1 to 1 part of carbon black; 1-5 parts of an anti-aging agent; and 150 to 200 parts of iron powder. The preparation method comprises the following steps: weighing the raw materials, mixing and pretreating; performing mixing; extruding into a sheet shape; calendaring to adjust the thickness and the flatness; and cooling and curing. After the formula is optimized, the cost is reduced, the mixing and processing processes of the raw materials are possibly smoother, and the loss and waste in the production process are reduced; the product has excellent vibration and noise reduction performance, good heat resistance, cold resistance and aging resistance, performance limitation can be reduced, and the service life of the damping fin is prolonged.

To provide a composite material used for managing thermal characteristics of a device or a system and having improved performance.SOLUTION: The present disclosure relates to the use of phosphonic acids to enhance the performance of thermal interface materials (broadly, composite materials), for example, by improving rheological properties, improving aging characteristics, improving shelf life, improving tack / adhesion, and / or reducing the diffusion of materials that migrate therefrom, if any, such as reducing oil bleed diffusion. The present disclosure also relates to methods of using phosphonic acids to improve the performance of composite materials useful for thermal and / or electromagnetic interference (EMI) management. The composite material can include a thermal management and / or electromagnetic interference (EMI) mitigation material, such as a thermal interface material (TIM), an EMI absorber material, a thermally conductive EMI absorber material, an electrically conductive material, combinations thereof, and the like.SELECTED DRAWING: None

The invention discloses a method for reducing timeliness of a hot-dip galvanized sheet for a U-shaped shell of a washing machine, which is characterized by comprising the following steps: (1) smelting-continuous casting production process flow; (2) a hot rolling production process flow: casting blank heating, rough rolling, finish rolling and coiling; the coiling temperature is 670 to 710 DEG C; (3) pickling and cold rolling process flow; and (4) continuous annealing process flow. According to the method for reducing the timeliness of the hot-dip galvanized sheet for the U-shaped shell of the washing machine, the coiling temperature in the hot rolling process is regulated and controlled, the solid solution content of interstitial atoms is controlled, and therefore the ageing resistance of aluminum killed steel DX51D + Z, DX52D + Z and other hot-dip galvanized sheets is improved.

According to the low-anisotropy 220MPa-grade hot-dip aluminum-silicon phosphorus-containing high-strength steel for the automobile and the preparation method of the low-anisotropy 220MPa-grade hot-dip aluminum-silicon phosphorus-containing high-strength steel, the hot-dip aluminum-silicon high-strength steel for the automobile covering part is prepared through low-cost component design and ingenious combination of heat treatment and the hot-dip aluminum-silicon technology, the yield strength of the high-strength steel ranges from 220MPa to 260MPa, the tensile strength is larger than or equal to 360MPa, the percentage elongation after fracture is larger than or equal to 41%, and the elongation after fracture is larger than or equal to 41%. The plastic strain ratio r value is larger than or equal to 2.1, the anisotropic special-shaped index delta r value is smaller than or equal to 0.3, and the work hardening index n value is larger than or equal to 0.21; and within 6 months after the steel plate is manufactured, the increment of the yield strength is smaller than or equal to 8 MPa, the reduction of the percentage elongation after fracture is smaller than or equal to 1%, the structure comprises ferrite, a TiN precipitated phase, a VC precipitated phase and a Cu-rich phase, and the steel for the high-strength automobile covering part has excellent forming performance, high surface quality, no timeliness and a small anisotropy value.

The present disclosure relates to the use of phosphonic acid to enhance performance of thermal interface materials (broadly, composites), e.g., by improving rheological properties, improving aging properties, improving shelf life, improving tack / adhesion, and / or reducing the spreading of material(s), if any, migrating therefrom (e.g., reduced oil bleed spreading, etc.). The present disclosure also relates to methods of using phosphonic acids for enhancing performance of composites useful for management of heat and / or electromagnetic interference (EMI). The composite may comprise thermal management and / or electromagnetic interference (EMI) mitigation materials, such as thermal interface materials (TIMs), EMI absorber materials, thermally-conductive EMI absorber materials, electrically-conductive materials, combinations thereof, etc.

The invention relates to a bio-based degradable mulching film material which is characterized by comprising the following components in parts by mass: 60-95 parts of bio-based degradable polyester PBX, 5-15 parts of polylactic acid PLA and 5-40 parts of functional master batch, pBX is polyester with a side chain containing a cyclic imide group; the functional master batch comprises additive nanoparticles formed by electrostatically adsorbing an anti-aging additive on the surface of coupling agent surface modified silicon dioxide, and bio-based degradable polyester PBX. A mulching film prepared from the mulching film material has good water vapor barrier property and ageing resistance, the process is convenient and fast, and the industrial application prospect is wide.

The invention discloses a piezoelectric ceramic composite material and a preparation method thereof, and belongs to the technical field of piezoelectric ceramics. The material is prepared from the following components in parts by mass: 15 to 20 parts of PET (Polyethylene Terephthalate) matrix, 15 to 20 parts of modified P (VDF-TrFE), 65 to 75 parts of Mn-doped PSN-PZT ceramic slurry, 8 to 12 parts of single-walled carbon nanotubes and 4 to 6 parts of ultraviolet curing adhesive, the preparation method comprises the following steps: dissolving modified P (VDF-TrFE) in N, N-dimethylformamide, and then adding NaOH for reaction, ceramic slurry is prepared by ball-milling epoxy resin, propylene glycol diglycidyl ether and the like with Mn-doped PSN-PZT powder, a composite material is formed through tape casting, plasma treatment and ultraviolet curing during preparation, a polarization strengthening-aging repairing synergistic system is constructed as a core, and the composite material has the advantages that the composite material is prepared into a composite material, and the composite material is prepared into the composite material. The anti-aging performance and the compressive strength are improved, and the method is suitable for wearable monitoring, wireless sensing and other scenes.

The invention provides high-toughness heat-insulating epoxy resin, a composite material and a preparation method thereof, and the high-toughness heat-insulating epoxy resin is prepared from the following raw materials: a component A and a component B, the mass ratio of the component A to the component B is (95-150): (80-120); the component A comprises 62-150 parts of epoxy resin and 8-15 parts of a toughening agent; the component B comprises the following components in parts by weight: 25-45 parts of a curing agent, 0.3-0.8 part of an antioxidant, 12-28 parts of an auxiliary agent and 32-50 parts of light filler; the auxiliary agent is at least one of nano titanium dioxide and silicon-titanium stacked composite microspheres. According to the epoxy resin and the composite material, the auxiliaries are added, the auxiliaries can be superposed with the low-heat-conductivity effect of the light filler, efficient heat insulation is achieved, energy is absorbed through interlayer slippage, interface bonding is strengthened through hydrogen-bond interaction with the epoxy resin matrix and the glass beads, and the mechanical property of the material is improved; the flexibilizer and the antioxidant are also added, so that the mechanical property and the anti-aging property of the composite material are improved.

The invention relates to the technical field of cable protection pipes, and provides an anti-aging cable protection pipe and a preparation method thereof. The aging-resistant cable protection tube is prepared from the following raw materials in parts by weight: 80 to 100 parts of polypropylene, 5 to 7 parts of modified carbon black, 15 to 20 parts of polyolefin elastomer, 20 to 30 parts of flame retardant, 2 to 5 parts of compatilizer and 0.5 to 1.5 parts of antioxidant, the modified carbon black is obtained by modifying carbon black with poly (2-hydroxyethyl acrylate); the modified carbon black is prepared from the following raw materials in parts by weight: 80 to 100 parts of carbon black, 10 to 12 parts of 2-hydroxyethyl acrylate and 0.2 to 0.3 part of initiator. According to the technical scheme, the problem of poor aging resistance of the cable protection pipe in the prior art is solved.

The application discloses a double-layer composite sealing structure of a battery shell and a manufacturing method thereof. The sealing structure comprises a stainless steel sheet, a double-layer PP plastic sealing ring formed on the surface of the stainless steel sheet through in-mold injection molding, an aluminum column arranged in a center hole, an aluminum cap arranged at an outer end, and a stainless steel battery shell. Laser surrounding welding is adopted between the aluminum column and the aluminum cap and between the composite sealing component and the battery shell. The manufacturing method comprises the following steps: preparing a microstructure on the surface of the stainless steel sheet; sequentially forming a double-layer sealing ring without a fusion mark through in-mold injection; press-fitting with interference and monitoring a press-in force curve in real time; swing laser welding the aluminum column and the aluminum cap; and positive defocusing laser bridge welding the whole assembly and the shell. Through in-mold injection of the double-layer sealing ring with a metal insert and an advanced welding process, the application solves problems such as aging of the sealing ring, assembly misplacement, insufficient sealing redundancy, riveting liquid leakage and the like, and has the advantages of high sealing reliability, accurate positioning, strong anti-aging property and suitability for mass production.

The application relates to a sealant tensile and aging performance testing device which comprises a mechanical loading device, a force sensor, a displacement sensor, an aging cabinet, and a spraying system, a rain barrier system and a rain drainage system on the aging cabinet; the spraying systems are evenly distributed on the two sides of the aging cabinet; the rain barrier systems are evenly distributed above the two samples; the rain drainage systems are evenly distributed in the x-axis direction of the two samples; the force sensors are distributed below the two samples; and the displacement sensors are distributed on the aging side and the horizontal side of the sealant strips. Compared with the prior art, the sealant tensile and aging performance testing device can simultaneously realize aging and mechanical loading of the samples, and can measure the displacement between the glass panel and the aluminum frame, and can realize accurate control of the set displacement period.

The invention relates to the technical field of decorative coatings, the polymer cement waterproof decorative coating is formed by mixing a wet material and a dry material according to the mass ratio of (1.5-2): 1, and the wet material is prepared from the following raw materials in parts by weight: 45-55 parts of a shape-assisting emulsion, 5-10 parts of dibutyl phthalate, 1-5 parts of an organic silicon water repellent agent, 1-5 parts of a defoaming agent, 5-10 parts of ethylene glycol butyl ether and 60-70 parts of water; the dry material is prepared from the following raw materials in parts by weight: 40-50 parts of cement, 30-40 parts of an anti-aging additive, 5-10 parts of silica fume and 5-10 parts of metakaolin; in the invention, under the synergistic effect of the shape-assisting emulsion and the anti-aging additive, the coating forms a composite film layer on the surface of a base material, can still maintain long-term stable adhesion in a humid or vibration environment, and is endowed with excellent durability, aging resistance, wear resistance and water resistance at the same time; the coating can still keep stable performance when exposed to severe environments such as high humidity, dramatic change of temperature difference and mechanical friction for a long time, and the service life is remarkably prolonged.

The present application relates to the field of asphalt concrete material, especially a kind of targeted anti-aging modified asphalt concrete and preparation method thereof.A kind of targeted anti-aging modified asphalt concrete is made from the following weight parts of raw materials: 8-12 parts of non-ionic emulsified asphalt, 15-25 parts of sandstone, 45-75 parts of gravel, 3-6 parts of mineral powder, 0.5-1.0 parts of ZnO@PAN fiber filler, 30-50 parts of rubber powder, 0.20-0.5 parts of anti-aging composition.The asphalt concrete prepared by the present application has excellent anti-aging property, impact toughness, permeability resistance and freeze resistance, effectively prolongs the pavement maintenance cycle and reduces the pavement maintenance cost.

The application relates to the field of composite current collector base film materials, and particularly discloses an electrolyte-resistant and anti-aging composite current collector base film, raw materials of which include, in terms of weight parts, 80-100 parts of PET resin, 7-22 parts of PEN resin, 2-4.5 parts of a coupling agent, 0.5-2 parts of a lubricant, and 14-25 parts of anti-aging and barrier-enhancing fillers; the anti-aging and barrier-enhancing fillers are prepared through the following steps: S1, in-situ synthesis of mesoporous silica on halloysite nanotubes; S2, assembly with mica sheets; S3, loading of an antioxidant after surface modification; and S4, grafting of a binary copolymer. The electrolyte-resistant and anti-aging composite current collector base film can comprehensively improve the electrolyte corrosion resistance, anti-aging property and heat resistance of the PET-based base film, and can also improve the bonding strength between the base film and a metal plating layer on the surface of the base film during application.

The invention discloses a high-performance organosilicon coated fabric and a preparation method thereof, and belongs to the technical field of fabric function modification. The method comprises the following steps: preparing a silica gel top coating and a silica gel surface layer; the preparation method comprises the following steps: by taking release paper as a bearing medium, sequentially coating a top coating and a surface coating on the release paper, curing each coating into a film by adopting a layer-by-layer heating mode, and adhering the film with a fabric base material to form an organosilicon coating fabric semi-finished product; the obtained semi-finished product of the organic silicon coating fabric is subjected to vulcanization ripening treatment, and the high-performance organic silicon coating fabric is obtained. According to the invention, the organic silicon coating is adopted to replace the traditional single-function coating, and the organic silicon material has excellent hydrophobicity, antifouling property, mildew resistance and aging resistance, so that the finished fabric synchronously has the multiple excellent properties, coating superposition design does not need to be carried out for each performance short plate, and the problem of single function in the traditional technology is solved.

The application belongs to the technical field of films, and particularly relates to a biodegradable composite material for packaging and a preparation method thereof. The biodegradable composite material for packaging comprises the following raw materials in parts by weight: polybutylene adipate terephthalate 50-60 parts, polylactic acid 40-50 parts, filler 1-3 parts, modified cellulose nanowhisker 0.5-1.5 parts, chain extender 0.1-0.5 parts, and compatilizer 1-3 parts. The biodegradable composite material for packaging has excellent barrier property, mechanical property, antibacterial property and anti-aging property.

The invention belongs to the technical field of films, and particularly relates to a biodegradable composite material for packaging and a preparation method thereof. The biodegradable composite material for packaging is prepared from the following raw materials in parts by weight: 50 to 60 parts of poly (butylene terephthalate)-adipate, 40 to 50 parts of polylactic acid, 1 to 3 parts of filler, 0.5 to 1.5 parts of modified cellulose nanowhiskers, 0.1 to 0.5 part of chain extender and 1 to 3 parts of compatilizer. The biodegradable composite material for packaging has excellent barrier property, mechanical property, antibacterial property and anti-aging property.