1722 results about "Side chain" patented technology

The invention provides a low-compression-stress low-density heat-conducting gasket and a preparation method thereof.The heat-conducting gasket is prepared from, by weight, 100-300 parts of vinyl silicone oil, 1-3 parts of end chain hydrogen-containing silicone oil, 2-6 parts of side chain hydrogen-containing silicone oil, 0.2-0.6 part of platinum catalyst, 300-700 parts of heat-conducting filler, 0.1-0.5 part of coupling agent and 0.1-0.5 part of inhibitor. Wherein the vinyl silicone oil is prepared by matching two kinds of vinyl-terminated polydimethylsiloxane with different viscosities and vinyl contents; and the heat-conducting filler is a ternary combination of spherical aluminum oxide, spherical boron nitride and beta-type silicon nitride with a lubricating function. The preparation method comprises the following steps: adding the raw materials into stirring equipment, controlling the vacuum degree during stirring by adopting staged negative pressure, stirring under the conditions that the negative pressure is less than or equal to-0.095 MPa,-0.06 to-0.07 MPa and less than or equal to-0.095 MPa in sequence, fully mixing the materials, clustering, transferring to a calender, and carrying out high-temperature vulcanization molding at 120-140 DEG C. The heat-conducting gasket has the characteristics of low compression stress and low density, and the production efficiency is remarkably improved.

The invention relates to the technical field of PC transparent flame-retardant toughening modification, in particular to phenolic hydroxyl-terminated modified polysiloxane with a side chain containing phenyl and sulfonate groups and a preparation method of copolymerized PC. The modified polysiloxane is prepared by the following steps: performing ring opening polymerization on phenol-containing double end sockets and cyclotetrasiloxane to obtain modified polysiloxane containing double bonds and phenyl functional groups, and grafting sulfonate through a thiol-ene click chemical reaction. Diphenyl carbonate, bisphenol A and the modified polysiloxane are used as raw materials, a polysiloxane-PC block copolymer is formed through copolymerization, efficient flame retardance and high transparency are achieved, and meanwhile extremely high low-temperature impact strength is achieved.

The invention relates to the technical field of preparation of organic photoelectric materials, in particular to an organic light-emitting device and a display or lighting device comprising the organic light-emitting device. A hole transport layer compound of the device is obtained by taking a phenyl and alkyl fixed substituted fluorenyl structure as a core fragment and taking a benzo five-membered ring and a limited substituted benzene ring as two side chains of amido, and is matched with a limiting material of a light-emitting auxiliary layer to manufacture an OLED (Organic Light Emitting Diode) element; the light-emitting efficiency and the working life of the organic light-emitting device are effectively improved, and the application prospect is very good.

To provide a film that allows production of a capacitor exhibiting superior operability of safety functions and that maintains withstand voltage at high temperatures, thereby yielding a capacitor with high withstand voltage at high temperatures.SOLUTION: A film has at least an A layer, wherein (1) the A layer contains, based on 100 mass%, 55 mass% or more and 97 mass% or less of a polypropylene resin and 3 mass% or more and 45 mass% or less of a polymer having an alicyclic structure in a side chain, and (2) a reduced peak height Spk of at least one surface is 0.02 μm or more and 0.15 μm or less.SELECTED DRAWING: None

The invention relates to the technical field of molecular simulation, and provides a method for constructing a heavy component average molecular structure of thickened oil, which comprises the following steps: inputting parameters, generating a core aromatic ring unit, constructing an inner-layer aliphatic ring unit, constructing an outer-layer aliphatic ring unit, generating a side chain unit, and storing and outputting structural information. A plurality of molecular structures meeting experimental data are generated at a time through a traversal algorithm thought, composition characteristics of a heavy oil complex mixture are met, more available molecular structures are provided for molecular simulation, the accuracy and efficiency of molecular modeling are improved, the molecular structures completely meeting the experimental data can be rapidly generated, and the method is suitable for large-scale popularization and application. And only the mass spectrometer, the elemental analyzer, the nuclear magnetic resonance hydrogen spectrum and the infrared spectrum data need to be input, so that the experiment cost is reduced.

The invention discloses an AIE imitated antibacterial peptide material and a preparation method and application thereof, and belongs to the technical field of polymer materials, the AIE imitated antibacterial peptide material takes an alkyl chain as a main chain, the position of a cation primitive is regulated, and AIE primitives with different D-A structures are combined as side chains, so that the AIE imitated antibacterial peptide material is prepared. Through the D-A structure in the AIE element, the molecular can be used for the performance regulation and control of generating ROS or photo-thermal through illumination response, so that the growth and proliferation of microorganisms can be inhibited, and the damage to a biofilm is further inhibited. The AIE imitated antibacterial peptide material is good in biocompatibility and has a wide application prospect in the field of antibacterial agents.

The invention discloses a memristor based on a covalent organic framework and a preparation method and application thereof.The memristor comprises a substrate, a semiconductor electrode, a covalent organic framework film and a metal electrode which are sequentially arranged in a stacked mode, and the covalent organic framework film is composed of 1, 3, 4, 5, 6, 7, 8, 8, 9, 10, 11, 12, 13, 14, 16, 17, 17, 17, 17, 17, 17, 17, 17, the catalyst is prepared by condensing 1, 3, 5-tri (4-aminophenyl) benzene and terephthalaldehyde or terephthalaldehyde with an alkyl or alkoxy side chain. The covalent organic framework film has a highly ordered structure and an adjustable porous structure, the preparation process is simple, the film thickness is uniform, the flatness and the crystallinity are high, and the dielectric property is adjusted, so that the switching voltage and the cycling stability of the memristor are adjusted, and the memristor has stable and repeatable switching performance; the COFs-based memristor has high on / off ratio, low device variability and high flexibility, can be used for preparing the COFs-based memristor, can provide technical support for neuromorphic devices with high efficiency, adjustability, structure adjustability and rich functions, and can be applied to the field of intelligent sensing and autonomous system control such as an auxiliary driving system.

The invention discloses an indolocarbazole compound, a perovskite solar cell and a preparation method, and belongs to the technical field of perovskite solar cells, the indolocarbazole compound provided by the invention is an organic small molecule material and has an asymmetric molecular structure, and an asymmetric conjugated structure system of the indolocarbazole compound enhances the molecular dipole moment and improves the photoelectric conversion efficiency. And the energy level matching is optimized. Meanwhile, benzene ring groups on side chains of molecules of the organic hole transport layer can further inhibit excessive aggregation of the molecules, uniform coverage is achieved, and efficient transport of carriers is achieved. Therefore, when the indolocarbazole compound organic small molecule material is used as a hole transport layer material for a perovskite solar cell, the energy levels of the highest occupied molecular orbital HOMO and the lowest unoccupied molecular orbital LUMO of the indolocarbazole compound organic small molecule material provided by the invention can be well matched with the energy level of an active layer material; therefore, the collection efficiency of current carriers is greatly improved, and the filling factor and the photoelectric conversion efficiency are improved.

The invention provides structures and synthesis of a class of piezoelectric monomers and COFs with fluorine-substituted side chains tethered on the peripheral position of an aromatic moiety (thus different functional side chains). The multi-fluoro groups on the mentioned piezoelectric COFs provide abundant piezoelectric active sites, which enable the application as the active layer for PENGs. The exemplary embodiments also provide a process for the fabrication of a piezoelectric COF and a process for the fabrication of the piezoelectric nanogenerator utilizing mentioned piezoelectric COF.

The invention discloses a highly inert Gd-DOTA-based contrast agent with a hydrophobic side chain as well as a preparation method and application of the highly inert Gd-DOTA-based contrast agent, and two novel Gd-DOTA-based contrast agents Gd-L1 and Gd-L2 are successfully developed by respectively connecting hydrophobic 3-phenyl propylamine and 3, 3-diphenyl propylamine to Gd-DOTABA. The two novel Gd-DOTA-based contrast agents remarkably improve the chemical inertness of the complex, the dissociation half-life period of the complex in a 1 M HCl solution at 37 DEG C is about 5 times that of Gd-DOTA, and a powerful guarantee is provided for clinical safety; the MRI (Magnetic Resonance Imaging) performance of the liver in a mouse shows that Gd-L1 is equivalent to commercially available Gd-BOPTA and is suitable for imaging of a liver and gall system; after the Gd-L2 is combined with the human serum albumin, the longitudinal relaxation rate is obviously increased (r1 = 14.8 mM <-1 > s <-1 >, 1.4 T, 37 DEG C), the blood elimination half-life period in a rabbit model is about 18 minutes, and the Gd-L2 is suitable for vascular MRI (Magnetic Resonance Imaging). The two contrast agents avoid the spleen residual problem, the organ accumulation possibility is reduced, and a safer and more efficient MRI diagnostic tool is provided for clinic.

The invention discloses a wear-resistant coating and application thereof on a leather surface, and belongs to the technical field of leather finishing. The coating comprises a functionalized polyurethane-acrylate composite emulsion, a photoinitiator, an auxiliary agent and deionized water. Wherein the composite emulsion is prepared from hyperbranched polyester polyol, a dynamic bond chain extender and the like through prepolymerization, fluorine-containing grafting and in-situ sol-gel reaction, a hyperbranched skeleton provides mechanical support, double dynamic bonds endow a self-repairing function, in-situ nano-compounding enhances wear resistance, a diurea hydrogen bond enhances binding force, and a fluorine-containing side chain endows a coating with hydrophobic and stain-resistant performance; and preparing the coating by matching with a gradient curing process. The coating prepared by the invention has high wear resistance, efficient self-repairing property, firm adhesive force, excellent stain resistance and leather adaptation flexibility, and meets the actual requirements of middle and high-end leather finishing.

The invention discloses an optical monomer and a preparation method thereof, a composition, a resin material and a preparation method thereof. The optical monomer provided by the invention comprises a quaternary carbon structure and a side chain connected with the quaternary carbon structure through an ester bond. The side chain comprises a thioether chain segment connected with an ester bond, an aromatic group connected with the thioether chain segment and an epoxy group connected with the thioether chain segment. The optical monomer provided by the embodiment of the invention takes a quaternary carbon structure as a core skeleton, and a side chain sequentially comprises an aromatic group, a thioether chain segment and a terminal epoxy group. A thioether structure with high polarizability and an aromatic group are introduced into the molecular design of the optical monomer, so that the refractive index and the optical transparency of a resin material are remarkably improved. And the rigidity of the epoxy aromatic ring is beneficial to improving the thermal stability and mechanical strength of the resin material. The epoxy group at the tail end can react with conventional epoxy resin to form a compact network structure, so that the stability of the resin material is improved, and the yellowing tendency is reduced.

The invention discloses vinyl fluorine-containing polysiloxane and a preparation method thereof, and relates to the technical field of organic silicon materials. According to the invention, high-activity fluorine-containing potassium hydroxide silanolate is used as a catalyst to realize high-efficiency catalysis; d3F serves as a main monomer, D3Vi serves as a comonomer, deionized water is introduced for the first time to serve as a retarder, and implosion is effectively inhibited; vinyl dimethyl ethyoxyl silane is used as an end-capping reagent for the first time, end group vinylation is synchronously realized, and end group and side chain divinyl polysiloxane is prepared; through cooperation of ring-opening polymerization and condensation polymerization, the reaction process is mild and controllable, the product viscosity is controllable, the crosslinking activity is high, and the application range is remarkably widened.

The invention belongs to the technical field of membranes, and discloses a monovalent / divalent cation selective separation membrane based on an intrinsic microporous polymer, and the preparation route of the membrane is as follows: taking an ether-free polymer synthesized by super acid catalysis as a precursor, introducing an ion exchange site into the polymer by utilizing grafting of a sulfonated monomer, and preparing the monovalent / divalent cation selective separation membrane based on the intrinsic microporous polymer. And improving the separation performance of monovalent ions / divalent ions by using an alkoxy chain graft with specific interaction on the monovalent ions, and greatly improving the mechanical strength of the membrane by using the interaction of hydrogen bonds between main and side chains, thereby finally obtaining the monovalent / divalent cation selective separation membrane. According to the present invention, the industrial production difficulty is significantly reduced by the full solvation reaction membrane synthesis route, the selectivity of the prepared membrane material is superior to the selectivity of the commercial membrane of the same type, the extremely high mechanical strength is maintained, and the large-scale production and application potential is provided.

The invention relates to the technical field of biological medicines, and discloses a polypeptide for treating osteoarthritis by aiming at AHR (Aryl Hydrocarbon Receptor), the amino acid sequence of the polypeptide is GFQQSDVIHQSVYELISINHTEDRA, and the amino acid sequence of the polypeptide is GFQQSDVIHQSVYELISINHTEDRA, and the amino acid sequence of the polypeptide is GFQQSDVIHQSVYELISINHTEDRA. The polypeptide is prepared by a solid-phase polypeptide synthesis method; the solid-phase polypeptide synthesis method specifically comprises the following steps: synthesizing from a C end to an N end, connecting a carboxyl group of a first amino acid to insoluble resin, then adding other amino acids one by one to form a peptide chain, and carrying out protection and deprotection reactions of a side chain in each step. The polypeptide is composed of natural amino acids and has good biocompatibility and degradability, and experimental results show that no obvious toxic reaction occurs in the cell level and the animal level, so that the polypeptide has conditions for further development of pharmacokinetic research and preclinical tests, and a feasible basis is provided for conversion to clinical application.

The invention discloses fluorine-containing bio-based epoxy resin as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The preparation method of the fluorine-containing bio-based epoxy resin comprises the following steps: enabling octafluoropentyloxy glycidyl ether as a fluorine unit to react with dihydric alcohol to obtain fluorine-terminated side chain butanediol, enabling the fluorine-terminated side chain butanediol to react with isocyanate to obtain a polyurethane prepolymer, and performing boric acid end capping on the polyurethane prepolymer by using 3-aminophenylboronic acid to obtain the fluorine-containing bio-based epoxy resin. The fluorine-containing bio-based epoxy resin (FBPU-ER) is prepared by the following steps: adding fluorine-containing polyurethane resin and phenylboronic acid into epoxidized soybean oil to obtain phenylboronic acid modified fluorine-containing polyurethane resin (FBPU), carrying out boric acid treatment on the epoxidized soybean oil by using 3-aminophenylboronic acid to obtain phenylboronic acid modified epoxy resin (BER), and finally, mixing the phenylboronic acid modified fluorine-containing polyurethane resin and the phenylboronic acid modified epoxy resin to obtain the fluorine-containing bio-based epoxy resin (FBPU-ER). The fluorine-containing bio-based epoxy resin prepared through fluorine-containing modification and toughening design has good mechanical properties, stability and self-repairing performance.

Provided are a novel modified side chain, and a preparation method therefor and a use thereof. In particular, provided are a modified side chain as represented by general formula (I), and a preparation method therefor, a pharmaceutical composition containing same, and a use thereof in the preparation of drugs for treating cancer, infections, neuropsychiatric diseases, cardiovascular diseases, endocrine diseases, and immune-related diseases.

Disclosed in the present disclosure are a bio-based organic silicon surfactant, and a preparation method therefor and the use thereof. The surfactant has the following structure: Si(CH3)3-O-[Si(CH3)2-O]a-[Si(CH3)R1-O]b-[Si(CH3)R2-O]c-Si(CH3)3. By using a comb-shaped structure with a hydrophobic siloxane as a main chain and a hydrophilic polyether as a side chain, a bio-based substance is grafted and introduced to the polyether at the side chain thereof by means of an epoxide ring-opening reaction, thereby adjusting the hydrophilicity and lipophilicity of the organic silicon surfactant to a certain extent and improving the surface activity of the organic silicon surfactant. The introduction of the bio-based substance can reduce the heat conductivity coefficient of polyurethane foam, increase the flow index of the polyurethane foam and improve the heat insulation performance and flowing performance of the foam. In addition, the synthesis of the organic silicon surfactant provides a new synthesis route for the development of a bio-based foam stabilizer; and the preparation method is simple, easily operated and suitable for industrial production.

The invention relates to polymer dispersions made from (meth)acrylates having long side chains, as well as to the preparation process to prepare the same. The invention also relates to a crude oil composition comprising a crude oil and the polymer dispersion according to the invention. The invention also relates to the use of these polymer dispersions as paraffin inhibitors to improve the flow properties of crude oil, as well as their use to improve the transport and / or storage of a crude oil.

To provide a chemically amplified negative resist composition having improved resolution in pattern formation and giving a resist pattern with good LER and pattern fidelity, and to provide a method for forming a resist pattern.SOLUTION: (A) a photoacid generator comprising an anion having the formula (A1) and a cation having a specific structure, and (B) a base polymer comprising a recurring unit having a specific structure with a phenolic hydroxyl group on a side chain.SELECTED DRAWING: None

The invention belongs to the technical field of electrochemical detection, and discloses an anti-pollution electrochemical saliva sensor based on fluorinated side chain polypeptide as well as a preparation method and application of the anti-pollution electrochemical saliva sensor. The fluorinated side chain polypeptide disclosed by the invention not only has excellent hydrophilicity, can form a dense hydration layer with water molecules to repel pollutants, but also has low surface energy, and the interaction between the pollutants and an interface is remarkably reduced. Through the synergistic effect, the fluorinated side chain polypeptide has better anti-pollution performance compared with traditional zwitterionic polypeptide. The anti-pollution electrochemical sensor constructed on the basis of the fluorinated side chain polypeptide can be used for directly detecting CA15-3 in saliva, the saliva does not need to be pretreated, and the detection accuracy can be comparable with that of a commercial ELISA (Enzyme-Linked Immunosorbent Assay) method.

The invention discloses polycaprolactone dihydric alcohol containing maleimide groups and a preparation method and application thereof, and the preparation method of the polycaprolactone dihydric alcohol comprises the following steps: adding N-(2, 3-dihydroxy propyl) maleimide, caprolactone and a catalyst into a reaction container, carrying out high-temperature reaction for 12-18 hours, filtering, washing, and drying to obtain the polycaprolactone dihydric alcohol containing the maleimide groups. And cooling and discharging to obtain the polycaprolactone diol containing the maleimide group. The polycaprolactone diol containing the maleimide group is used as a raw material to prepare a polyurethane prepolymer, so that the side chain of the prepolymer is provided with the maleimide group, and then a difuran compound is introduced as a dynamic cross-linking agent to obtain the self-repairing polyurethane elastomer containing the Diels-Alder bond. Through the reversible Diels-Alder (D-A) reaction effect of the functional components, the polyurethane elastomer can be remodeled and recycled, and the polyurethane elastomer has excellent and stable mechanical properties, self-repairing efficiency and repeated self-repairing capability.

The present invention relates to water-insoluble polymer membranes (AEM) on the basis of new side-chain functionalized copolymers on the basis of hydrogenated polynorbornenes and their use as alkaline anion exchange membrane materials, for example in alkaline water electrolyzers, fuel cells or flow batteries.

The invention discloses a photosensitive polyimide, a negative photoresist and an application of the photosensitive polyimide in preparation of a film, the structure of the photosensitive polyimide is shown in the specification, X is a tetravalent organic group and is a residue X of a polyimide polymerization monomer tetracarboxylic dianhydride; y is a divalent organic group and is a residue Y of a polyimide polymerization monomer diamine; r1 and R2 are monovalent organic groups and are residues of primary alcohol forming side chain ester bonds of side chain polyamic acid ester; side chains R1 and R2 at least contain tertiary amine structures, and at least one of the side chains R1 and R2 containing the tertiary amine structures can form ammonium salt with phosphate containing an allyl structure; and n is an integer from 2 to 150. The invention provides a photosensitive polyimide which can be developed by adopting an alkaline aqueous solution, can be cured at low temperature and can form a negative pattern, a preparation method of a photoresist composition of the photosensitive polyimide, and a photoetching curing film, which can be applied to display industry or semiconductor industry as an insulating layer, a passivation layer or an interlayer dielectric layer and the like.

The invention relates to the technical field of biomedical material modification, in particular to a sulfhydrylation biocompatible polymer derivative, a preparation method thereof, extracellular matrix imitating injectable in-situ cross-linked hydrogel and application thereof. According to the invention, a pre-acylation strategy is firstly carried out on the biocompatible polymer containing both amino and carboxyl, so that a three-dimensional cross-linked byproduct formed by coupling of self amido bonds is avoided, meanwhile, the number of side chain carboxyl for sulfhydrylation modification is increased, and the accurate and adjustable pre-acylation rate can optimize the physical and chemical properties of the derivative; meanwhile, a disulfide bond is used as a protective precursor, active sulfydryl is introduced through amido bond coupling, self-oxidation of the active sulfydryl in the reaction process is avoided, sulfydryl activity is guaranteed, hydrazine-containing reagents are avoided, safety is further improved, virus residues and immunological rejection risks are avoided, universality is high, and the application prospect is wide; and in combination with a high-concentration preparation method, the method has the advantage of large-scale production, and further widens the industrial application potential.

The invention belongs to the field of organic-inorganic hybrid materials, and discloses a high-temperature-resistant polyhedral oligomeric silsesquioxane material and a preparation method thereof. According to the high-temperature-resistant polyhedral oligomeric silsesquioxane material, polyimide serves as a main chain, aminopropyl hepta-isobutyl polyhedral oligomeric silsesquioxane serves as a side chain, and a hybrid system with a clear structure is formed through chemical bonding. The obtained high-temperature-resistant polyhedral oligomeric silsesquioxane material has both the toughness of polyimide and the high-temperature stability of a cage structure, is high in thermal decomposition temperature, and is suitable for the fields of high-temperature-resistant coatings, electronic packaging, aerospace and the like. According to the method, the raw materials are low in price, wide in source channel and low in toxicity, and the obtained product is high in purity and excellent in performance and has good actual use value.

A liquid crystal composition contains a side chain type polymer liquid crystalline compound which can form a light absorption anisotropic film having a high alignment degree and has excellent solubility in a general-purpose solvent, a light absorption anisotropic film obtained using the composition, a laminate, and an image display device. The composition includes: a side chain type polymer liquid crystalline compound; and a dichroic substance, in which the compound is a copolymer having a repeating unit (1) containing a mesogenic group with a molecular weight of greater than 280 and a repeating unit (2) with a molecular weight of 280 or less, a content of the repeating unit (2) is less than 14% by mass with respect to a total mass of the compound, and a content of the dichroic substance is greater than 2% by mass with respect to a total solid content of the composition.

The invention discloses a polycarboxylate superplasticizer with a linear water-reducing rate as well as a preparation method and application of the polycarboxylate superplasticizer. The water reducing agent is prepared from a polyether macromonomer phosphating derivative, a carboxylic acid monomer, a sulfonic acid monomer, an ester slump retaining monomer, a linear regulation and control monomer and other units through a free radical emulsion polymerization process. Compared with a traditional polycarboxylic acid water reducer, the water reducer has more regular side chain arrangement, higher charge density, higher adsorption capacity and more stable dispersing performance, the water-reducing rate can be linearly increased along with the increase of the mixing amount within the effective mixing amount range, and the water-reducing efficiency is improved. The problem that the concrete fluidity is difficult to control due to nonlinear fluctuation of the water reducing rate of a traditional polycarboxylic acid water reducing agent is solved, and the method has important significance on improving the concrete construction stability and the engineering quality. The product provided by the invention has excellent mud resistance and slump loss resistance besides high linear water-reducing rate, is suitable for various cast-in-place and precast concrete projects, and has remarkable economic value and application prospect.

The application relates to the packaging technical field and discloses a high-barrier antibacterial food packaging film and a preparation method.The raw materials of the packaging film of the application include 100 parts by weight of polyvinyl alcohol, 2-8 parts by weight of modified polyvinyl alcohol, 5-30 parts by weight of carboxymethyl chitosan and 5-20 parts by weight of sodium-based montmorillonite;the modified polyvinyl alcohol contains quaternary ammonium salt as an antibacterial group, cooperatively plays an antibacterial role with the carboxymethyl chitosan and significantly improves the antibacterial performance of the packaging film.The modified polyvinyl alcohol introduces a quaternary ammonium salt cation structure with smaller steric hindrance at the side chain end, facilitates ion exchange of the montmorillonite, modifies the polyvinyl alcohol molecular chain on the surface of the montmorillonite, improves the compatibility and dispersibility of the montmorillonite in the polyvinyl alcohol packaging film and is beneficial to improving the mechanical strength and gas barrier performance of the packaging film.

The invention discloses an environment-friendly degradable plastic packaging bag and a preparation method thereof, belongs to the technical field of packaging bag preparation, and is used for solving the technical problem that the degradation capability and the mechanical property of an environment-friendly packaging bag in the prior art need to be further improved. According to the invention, the prepared carbonic acid bridged compact polyester is used as a main body skeleton to provide strength and film-forming property, silica acetal hybrid polysaccharide is introduced to form a compact and complex diffusion path inside and reduce gas and moisture permeation, and then active side chain polyamino acid is added to adjust interfacial compatibility and enhance structural stability, so that the film-forming property is improved. Through reasonable combination of the three components, the environment-friendly packaging bag keeps high tensile strength and tearing strength, meanwhile, the barrier property is remarkably improved, and gradual complete degradation is achieved in compost and soil environments.