38results about How to "Reduce polarity" patented technology

The invention relates to the technical field of pressure-sensitive adhesives, in particular to a high-temperature-resistant high-impedance pressure-sensitive adhesive, a supporting film and a preparation method of the supporting film. A styrene-butadiene-styrene block copolymer (SBS) is used as a main body material, an acrylic copolymer with high carboxyl content is grafted in a solvent in a thermal initiation mode, the high-temperature-resistant and high-impedance pressure-sensitive adhesive is obtained after the high-temperature-resistant and high-impedance pressure-sensitive adhesive is compounded with tackifying resin, a curing agent and an antioxidant, and after optical-grade PET is coated with the high-temperature-resistant and high-impedance pressure-sensitive adhesive, the high-temperature-resistant and high-impedance pressure-sensitive adhesive is obtained. According to the novel supporting film, the polarity of the SBS main body material is low, the excellent electrical insulation performance is provided, the supporting film body has the characteristic of high impedance, and therefore the requirement for high impedance of the supporting film in a copper bar friction experiment is met; in addition, after the acrylic copolymer with high carboxyl content is grafted, a large number of crosslinking points can be provided, and the overall crosslinking degree is greatly increased after thermocuring, so that the high-temperature modulus of the adhesive layer is improved, and the adhesive layer is endowed with the characteristic of high-temperature deformation resistance.

The invention relates to the technical field of biodegradable materials, and particularly discloses a BBM-added bamboo powder biodegradable material and application thereof in beer bottles. The BBM-added bamboo powder biodegradable material is prepared from the following raw materials in parts by mass: 10 to 20 parts of poly (butylene succinate), 10 to 30 parts of poly (butylene adipate-co-terephthalate), 10 to 20 parts of bamboo powder, 1 to 3 parts of dopamine hydrochloride, 0.1 to 0.5 part of n-butylamine, 1 to 2 parts of hexadecyl trimethyl ammonium bromide, 1 to 5 parts of tetraethyl orthosilicate and 1 to 2 parts of tetrabutyl titanate. 1-2 parts of 3-aminopropyltriethoxysilane, 1-2 parts of an antioxidant and 1-2 parts of a plasticizer. The BBM obtained by the invention has excellent mechanical properties, improves the anti-ultraviolet intensity of a degradable material to a certain extent, and has very good biodegradability.

The invention provides a double-sided adhesive tape for pasting a low-surface-energy material and a preparation method of the double-sided adhesive tape. The adhesive tape is of a four-layer structure and comprises an acrylate pressure-sensitive adhesive layer and the like. Through selection of raw materials and design of a macromolecular structure, good wetting and bonding of a low-polarity base material are realized by utilizing an acrylic acid long-chain alkyl ester chain segment, and the problem that a low-surface-energy material is difficult to bond is solved. The adhesive formula used in the invention contains a special chain segment, has strong affinity with a low-polarity base material, and has a good bonding effect; polymerization reaction design is ingenious, and polymer performance is ensured; the monomer combination is reasonable, the compatibility is ensured, the polarity is reduced, an effective solution is provided for bonding of low-surface-energy materials, and the method has a wide application prospect.

The preparation method comprises the following steps: dissolving PVDF (Polyvinylidene Fluoride) in acetone, adding a small amount of Tween 80, carrying out oil bath at 60 DEG C, and uniformly mixing until the solution is transparent, so as to prepare a polymer solvent system; and standing and defoaming the obtained solution, pouring into a mold, and naturally volatilizing by controlling the humidity to obtain the polymer porous membrane with the porous microsphere net structure. According to the method, phase separation is induced through solvent evaporation, and synchronous construction of micron holes and nanospheres of the PVDF porous membrane is achieved. Compared with a traditional phase separation membrane preparation technology, the method has the advantages that the pore size of the PVDF porous membrane can be greatly expanded, controllable preparation of micron / nano pores of the PVDF porous membrane is realized, and the prepared porous membrane has more excellent reflectivity and cooling performance.

The invention relates to a perfluorohexanone nano microcapsule multi-time fire extinguishing tablet and a preparation method thereof, and belongs to the technical field of fire extinguishing material processing. The invention discloses a preparation method of a perfluorohexanone nano microcapsule multi-time fire extinguishing tablet. The preparation method comprises the following steps: (1) preparing an oil phase for later use; (2) preparing a water phase for later use; (3) stirring the oil phase and the water phase at a high speed to obtain an emulsion; and (4) adding an initiating monomer into the emulsion, heating, preserving heat, filtering, washing and drying to obtain the perfluorohexanone nano microcapsule. And (5) mixing with a base material, introducing into a mold, curing, drying, and spraying a high-molecular polymer on the surface to obtain the perfluorohexanone nano microcapsule multi-time fire extinguishing tablet. According to the perfluorohexanone nano microcapsule, lignin-based polyurethane is used as an outer shell, a polyurea / polyurethane composite structure is used as an inner shell to form a double-shell structure, and therefore the perfluorohexanone nano microcapsule prepared through the method has a compact and stable capsule wall structure, the embedding rate is high, and the fire extinguishing property is excellent.

The invention belongs to the technical field of fiber materials and provides a method for preparing modified aramid fiber. The method comprises the following steps: step 1: providing aramid fiber; step 2: dissolving a complex in a first organic solvent to obtain a first mixed solution, adding the aramid fiber to the first mixed solution, and performing a drying process after soaking for 8-48 hours; step 3: dissolving a compound of formula I in a second organic solvent to obtain a second mixed solution, adding the product obtained in step 2 to the second mixed solution, and performing a drying process after soaking for 1-4 hours to obtain the modified aramid fiber.

The application relates to the technical field of functional materials, in particular to a vinyl-modified magnesium-based flame retardant as well as a preparation method and application thereof, which comprises the following steps: adding water-magnesite into an ethanol solution to stir into a slurry, adding a modification aid, heating to 50-80 DEG C, constant-temperature stirring for 10-20 min, then filtering, drying, and obtaining the vinyl-modified magnesium-based flame retardant; the mass ratio of the water-magnesite to the modification aid is 1:(0.001-0.005). The vinyl-modified magnesium-based flame retardant does not contain halogen, has high-efficiency flame retardation, has good compatibility with high-molecular materials, and can improve the mechanical properties of high-molecular polymer materials when used.

This disclosure relates to the field of polymer emulsions, specifically to a method for preparing a peelable emulsion. The method includes: reacting glycidyl methacrylate, amino-terminated silicone oil, and sodium flakes at room temperature with stirring in the dark, and filtering to obtain double-bond modified silicone oil; separating a vinyl monomer into a first monomer and a second monomer, and dispersing the double-bond modified silicone oil in the first monomer to obtain a third monomer; preparing a pre-emulsion by ultrasonic emulsification of the second monomer, an emulsifier, and water; adding the pre-emulsion, an aqueous solution of the crosslinking monomer, and an aqueous solution of the first ammonium persulfate to a reaction vessel to form a core-phase emulsion; adding the third monomer and the aqueous solution of the second ammonium persulfate dropwise into the core-phase emulsion to form a core-shell emulsion; naturally cooling the core-shell emulsion, adjusting the pH to 7-8 with ammonia, and filtering to obtain a peelable emulsion. The method for preparing a peelable emulsion provided in this disclosure aims to overcome problems such as weakened peelable coating performance caused by excessive use of release agents.

This invention relates to the field of polymer foaming materials technology, and discloses a plant fiber composite nucleating agent for microfoaming of biodegradable materials and its application. The plant fiber composite nucleating agent is made from raw materials comprising the following parts by weight: 80-95 parts of primary ultrafine plant fiber powder, 5-20 parts of surface modifier, and 0.1-5 parts of dispersing lubricating wax; the surface modifier and dispersing lubricating wax are coated on the surface of the primary ultrafine plant fiber powder. The application steps are as follows: adding the plant fiber composite nucleating agent to a biodegradable material matrix to obtain a pre-foaming blend, introducing foaming gas or adding a chemical foaming agent for foaming treatment. The nucleating agent of this invention improves the compatibility between plant fibers and hydrophobic biodegradable matrices, provides heterogeneous nucleation sites in the matrix while increasing the polymer melt strength, inhibits cell coalescence and rupture, and obtains microfoamed materials with uniform pore size. Furthermore, the nucleating agent itself is completely biodegradable.

The present application relates to the technical field of external use patch, disclose a kind of neck shoulder waist leg pain health care patch and its preparation method, the health care patch includes backing layer, ointment layer and anti-adhesion release layer;Ointment layer raw material includes: traditional Chinese medicine extract flow leaching paste, L- (+) -tartaric acid, PVP K30, PEG-400, ternary eutectic solvent, polyacrylate pressure sensitive adhesive matrix and ultrafine medicinal powder.Preparation, after flow leaching paste, tartaric acid etc. are mixed, gel precursor is formed by vacuum dewatering and dealcoholization, swelling is added again with eutectic solvent, and then mixed with pressure sensitive adhesive matrix and medicinal powder high shear, finally coating solidification.The present application constructs physical crosslinking gel network in colloid interior and promotes effective component acid-base salt formation, effectively avoids polar component crystallization precipitation, reduces the skin irritation caused by drug burst release, simultaneously improves the cohesion of ointment, realizes long-acting smooth drug release.

The present invention relates to the technical field of epoxy resins for electronic circuits, and provides a modified epoxy resin, a preparation method thereof, and an application thereof in halogen-free high-speed copper-clad laminates. The modified epoxy resin provided by the present invention includes material A and material B; the preparation method of material A includes the following steps: mixing a linear phenolic epoxy resin, a reactive flame retardant DOPO, and a catalyst for reaction; mixing the obtained reaction solution with a tetrafunctional glycidyl ether and an organic solvent to obtain material A; the preparation method of material B includes the following steps: mixing a BPA-type benzoxazine resin, dicyandiamide, and an organic solvent to obtain material B. The present invention obtains a modified epoxy resin by combining a plurality of resin systems, and the obtained modified epoxy resin does not contain halides, and is suitable for preparing halogen-free high-speed copper-clad laminates. The copper-clad laminate prepared using the modified epoxy resin of the present invention has lower dielectric loss and lower expansion coefficient, and has good heat resistance and flame retardancy.

The invention relates to the field of fluorescent dyes, in particular to a near-infrared fluorescent dye for brain imaging as well as a preparation method and application of the near-infrared fluorescent dye. The near-infrared fluorescent dye for brain imaging has the advantages of novel structure, good biocompatibility, large Stokes shift, high light stability, high fluorescence signal-to-noise ratio and the like; the near-infrared fluorescent dye prepared by the invention is simple in preparation process, mild in reaction condition, short in synthesis path and beneficial to industrial production, and has a wide application prospect.

The invention relates to the field of rubber, in particular to a natural rubber material with high tear resistance and high resilience and a preparation method thereof. Allyl glycidyl ether is used as a monomer and potassium tert-butoxide is used as an initiator. Polyallyl glycidyl ether is prepared as an unsaturated polyether skeleton by anionic ring-opening polymerization, sulfonic acid anion groups and thiolated nano zinc oxide are sequentially introduced into side chains by mercapto-ene click reaction to obtain polyether anion-modified zinc oxide, and furan carboxylic acid imidazolate polyionic liquid is introduced on the surface of the polyether anion-modified zinc oxide by electrostatic assembly to obtain composite zinc oxide; furan carboxylic acid imidazolate polyionic liquid is used to wet-modify a reinforcing agent, and the furan carboxylic acid imidazolate polyionic liquid is loaded on the surface of the reinforcing agent by controlling the mass ratio thereof, thereby reducing the polarity of the surface thereof, improving the uniformity of the dispersion of the reinforcing agent in the rubber matrix, and improving the mechanical properties of the rubber material.

The invention discloses a high-impact-resistance HPVC electric power pipe and a processing technology thereof, belongs to the technical field of HPVC materials, and aims to solve the technical problem that the impact resistance and wear resistance of an HPVC electric power pipe in the prior art need to be further improved. The composite material comprises an anti-electromagnetic interference layer and an anti-impact HPVC layer wrapping the anti-electromagnetic interference layer, a radiation cross-linking agent and HPVC powder are subjected to melt extrusion, modified HPVC with a three-dimensional network structure is obtained through radiation cross-linking, and then the modified HPVC, a modified plasticizer and auxiliary materials are subjected to melt extrusion to hybridize a polyvinyl chloride chain segment space structure. Wherein the three-dimensional siloxane network and the copper grids are matched with each other, so that the electromagnetic shielding capability of the material is improved, the electrical insulating property is improved, the mechanical property and the adaptability are enhanced, and the impact-resistant and anti-interference HPVC electric power pipe which is resistant to high temperature, resistant to stretching, resistant to abrasion, resistant to flame and good in sealing performance is obtained.

The invention relates to a method for removing a perfluoropolyether acyl fluoride end group. The method comprises the following steps: adding perfluoropolyether acyl fluoride, a fluorinating agent, a catalyst and a solvent into a photochemical reactor, reacting for 2-12 hours under the conditions of normal temperature and normal pressure and ultraviolet irradiation, and removing acyl fluoride end groups to obtain perfluoropolyether which can be used as perfluoropolyether vacuum pump oil, the fluorinating agent is a fluorine-containing aromatic compound. The method has the advantages of simple operation steps, easy realization of reaction equipment, mild reaction conditions, avoiding of decomposition loss of the perfluoropolyether product due to high temperature, safety and energy saving.

The invention discloses a long-circulation lithium metal battery carbonic ester-based electrolyte as well as a preparation method and application thereof, and belongs to the technical field of lithium battery electrolytes. The carbonic ester-based electrolyte of the long-circulation lithium metal battery comprises the following components: lithium salt, a solvent and a saturated hydrocarbon additive, the solvent is fluoroethylene carbonate, methyl ethyl carbonate and fluoroether. According to the method, a polarity regulation and control strategy is proposed for the first time, the hydrocarbon additive is introduced into the fluorine-containing ether solvent and serves as a weak solvation medium, the polarity of the carbonic ester-based electrolyte is reduced, non-polar saturated hydrocarbon is successfully introduced into the electrolyte on the basis of the principle of similar miscibility, and the problem of bright phase separation is solved; the non-sacrificial electrolyte can significantly reduce the occurrence of side reactions in the electrolyte, and realizes long-term stable circulation of the lithium metal battery.

The invention belongs to the technical field of synthetic leather, and discloses waterborne polyurethane-based flame-retardant microfiber synthetic leather and a preparation method thereof. According to the preparation method disclosed by the invention, alkyl siloxane forms polyalkyl siloxane on the surface of MXene through in-situ condensation, and then the polyalkyl siloxane is terminated by using a silane coupling agent containing an active group primary amine group, so that the reaction activity of the modified MXene is improved. According to the invention, after successful phase inversion of aromatic aldehyde terminated polyurethane, an aqueous dispersion of modified MXene is added for emulsification, due to the existence of an aqueous medium, aromatic aldehyde terminated polyurethane and modified MXene nanosheets can stably coexist and do not react, and substances with larger molecular weight are generated only along with reduction of moisture in a drying process; the valence bond combination of the flame retardant and the polyurethane is completed. The solid content of the composite emulsion can be increased, and the flame-retardant durability of the composite emulsion modified microfiber synthetic leather material can be improved.

This invention discloses a method with a high proportion of supercage Na + This paper describes the application of exchange-site FAU molecular sieves for the adsorption and separation of fluorine-containing electron gases. The molecular sieve possesses the FAU molecular sieve configuration recognized by the International Zygotes Association (IZA), with a chemical composition molar ratio of Al₂O₃:mSiO₂:nNa₂O, where the molar ratio m of the oxide SiO₂ / Al₂O₃ ranges from 5 to 20. This molecular sieve is synthesized using an initial gel prepared from an organic template agent, water, silicon source, and aluminum source. FAU seed crystals are added, and the charge density of the organic template agent is adjusted. Different cage structures of the FAU molecular sieve are assembled. Furthermore, through mixing with a solid salt containing Na and solid-phase exchange, Na in the supercage is achieved. + Control of the exchange site ratio. Compared with the commercial molecular sieve USY2.6, this invention has a high proportion of supercage Na. + Exchange-site FAU molecular sieves can be used for the adsorption and separation of fluorine-containing electronic gases in gas-phase systems, especially pentafluorochloroethane C2F5Cl (R115) and hexafluoroethane C2F6 (R116), and the separation effect is good.

The invention discloses a halogen-free flame-retardant polyethylene core layer material for a decoration fireproof aluminum-plastic panel, and belongs to the technical field of building fireproof materials. The halogen-free flame-retardant polyethylene core layer material for the decoration fireproof aluminum-plastic panel is prepared from low-density polyethylene, high-density polyethylene, an ethylene-ethyl acrylate copolymer, modified sepiolite-loaded phytic acid, ethylene-octene copolymer coated expanded graphite, a modified hydroxide flame retardant, a modified nano hydrotalcite flame retardant and a lubricant polyethylene wax. According to the halogen-free flame-retardant polyethylene core layer material for the decoration fireproof aluminum-plastic panel, the tensile strength is 24.5 to 25.2 MPa, the elongation at break is 41.6 to 47.5 percent, the impact strength is 47.1 to 48.5 kJ / m < 2 >, the bending strength is 25.9 to 27.2 MPa, and the oxygen index is 40.4 to 41.1.

This invention discloses the use of a class of polysubstituted cyclic ether compounds as solvents for lithium-ion battery electrolytes. The polysubstituted cyclic ether compounds are alkyl-substituted cyclic ether solvents. These polysubstituted cyclic ether solvents have lower dielectric constants and lower ion desolvation energies, and exhibit good stability with lithium metal / graphite anodes. More importantly, these polysubstituted cyclic ether compounds have no special restrictions on the type of lithium salt. Using these polysubstituted cyclic ether compounds can significantly improve the low-temperature performance of batteries, thus broadening their applicability.

Provided is a method for analyzing proteoglycan, whereby proteoglycan in a sample can be easily analyzed. A sample containing proteoglycan is immersed or added to an aqueous solution containing a salt, and a purified precipitate obtained by adding an alcohol at a low specific concentration to the obtained liquid composition is subjected to proteoglycan analysis.

The invention relates to the technical field of copper-clad plate preparation, in particular to a high-frequency high-speed phenolic resin-based copper-clad plate and a preparation method thereof. According to the invention, 4, 4-dihydroxydiphenylmethane, paraformaldehyde, 2-bromo-6-fluoroaniline and 4-chloromethyl styrene are added, such that azacalixarene is obtained. And then taking 9-bromo-1-nonanol, dichloromethane, 2-chloro-1, 3-butadiene and triphenylphosphine as main raw materials, so as to obtain a phosphonium bromide product. And mixing azacalixarene, the phosphonium bromide product and dibenzoyl peroxide, and carrying out staged heating to obtain the composite resin. The resin glue solution is obtained by adding phenolic resin, composite resin, butanone, a flame retardant, a filler and an accelerant. Finally, glass fiber cloth is soaked in the resin glue solution, and prepregs are obtained; and overlapping copper foils on two sides of the prepreg to obtain a finished product. The finished product obtained by the invention has good dielectric property and antibacterial property, and meets the high-frequency and high-speed signal transmission requirements and antibacterial protection performance of the copper-clad plate.

The invention relates to an adsorbent for extracting lithium as well as a preparation method and application thereof, and belongs to the technical field of materials. Firstly, a precursor solution is prepared; then preparing a spinel type lithium magnesium aluminum oxide; and finally obtaining the adsorbent for high-temperature lithium extraction. The adsorbent disclosed by the invention can realize efficient adsorption of lithium ions in geothermal fluid, the Li < + > saturated adsorption capacity of the adsorbent is greater than 40mg / g at about 80 DEG C, and the saturated adsorption capacity of the adsorbent is greater than 35mg / g after the adsorbent is recycled for 30 times.

This invention discloses an industrial-scale chemical preparation method for 1,2-di fatty acid glycerides, comprising the following steps: (A) acetone glycerol is protected with a silyl ether protecting agent and purified by crystallization to obtain intermediate 1; (B) intermediate 1 undergoes a depropionyl protecting group reaction and crystallization to obtain intermediate 2; (C) intermediate 2 undergoes an esterification reaction and crystallization and adsorption to obtain intermediate 3; (D) intermediate 3 undergoes a desilyl ether protection reaction and recrystallization to obtain 1,2-di fatty acid glycerides. This invention, through crystallization purification under different conditions, avoids the disadvantages of traditional chemical methods for preparing 1,2-di fatty acid glycerides, such as the need for multiple column chromatography purification steps, low yield, and difficulty in industrialization. This method features mild operating conditions, high purity, and is easily scalable for large-scale industrialization.

The present application belongs to the technical field of traditional Chinese medicine extraction, and particularly relates to an extraction method of high-activity ginseng extract, which is used for improving the conversion and extraction efficiency of rare ginsenosides Rg1, Rg3, Rg5, Rh2 and Compound K. The extraction method combines microbial fermentation, electrostatic field wall breaking and supercritical CO2 extraction. The microbial fermentation treatment is mainly used for promoting the synthesis of ginsenosides, the high-voltage pulse electric field induces the electroporation effect of ginseng cells to increase the permeability of cell membrane and cell wall, the supercritical CO2 extraction has high cell permeability to improve the extraction rate and purity of ginsenosides, and in addition, the catalytic aid added in the extraction process is helpful to the conversion and catalysis of rare ginsenoside components.

The invention provides fatty acylation split-ring iridoid glycoside as well as a preparation method and application thereof, the fatty acylation split-ring iridoid glycoside comprises at least one of fatty acyl gentiopicroside, fatty acyl sweroside and fatty acyl swertiamarin, and the fatty acyl gentiopicroside is at least one of fatty acyl gentiopicroside, fatty acyl sweroside and fatty acyl swertiamarin. Wherein the fatty acyl gentiopicroside, the fatty acyl swertiamarin and the fatty acyl swertiamarin are respectively represented by a structural formula (I), a structural formula (II) and a structural formula (III), and a group R1, a group R2 and a group R3 are respectively and independently selected from alkyl or alkenyl with the carbon atom number of 5-21. The preparation method of the fatty acylation split-ring iridoid glycoside is also applied to preparation of a fatty acylation gentian plant extract. The fatty acylation split-ring iridoid glycoside and the fatty acylation gentian plant extract are used as raw materials to be applied to the field of medicine to play the roles of relieving, removing red, resisting inflammation, relieving itching, cleaning, emulsifying and resisting bacteria, and are also used as functional raw materials to be applied to the field of daily chemicals to play the roles of relieving, removing red, resisting inflammation, relieving itching, cleaning, emulsifying and resisting bacteria.

The invention belongs to the technical field of polyurethane, and discloses a flame-retardant waterborne polyurethane emulsion as well as a preparation method and application thereof. According to the invention, alkyl siloxane forms polyalkyl siloxane on the surface of MXene through in-situ condensation, and then a silane coupling agent containing an active group (amido or epoxy group) is used for blocking, so that the reaction activity of the modified MXene is improved. The prepared modified MXene nanosheet is introduced into a polyurethane molecular chain through copolymerization, so that the storage stability of the emulsion is improved, and the uniformity and durability of the flame retardant property are also improved. According to the preparation method, after polymer dihydric alcohol reacts with diisocyanate to generate a prepolymer, chain extension is carried out by using the polyalkyl siloxane modified MXene nanosheet containing the active group, the prepared waterborne polyurethane is easy to form a film, and the film is good in flexibility and good in binding strength with a fiber product.

The invention discloses a silicon-containing polyurethane hybrid phenolic aerogel and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a phenol ring-terminated silicon-containing polyurethane prepolymer; (2) mixing the phenol ring-terminated silicon-containing polyurethane prepolymer with phenolic resin to prepare a mixed solution, adding a curing agent, and carrying out gel reaction to prepare silicon-containing polyurethane hybrid phenolic aldehyde wet gel; and (3) removing a liquid phase in the silicon-containing polyurethane hybrid phenolic aldehyde wet gel to obtain the silicon-containing polyurethane hybrid phenolic aldehyde aerogel. According to the invention, a phenol ring-terminated silicon-containing polyurethane prepolymer is synthesized, an organosilicon component is introduced into phenolic resin through a phenol ring, the heat resistance and flexibility of a linear polysiloxane structure are utilized to improve the mechanical properties and high-temperature oxidation resistance of phenolic aerogel, and the hydrophobic property of the phenolic aerogel is also improved.

The present application relates to the technical field of photovoltaic packaging materials, and discloses a white photovoltaic packaging adhesive film, a preparation process thereof and a photovoltaic module. The white photovoltaic packaging adhesive film has a multilayer composite structure, including a corrosion-resistant layer facing a photovoltaic cell, a reflective layer and an adhesive layer facing a photovoltaic backboard. The corrosion-resistant layer includes a low-polarity POE resin and / or an EVA resin with a VA content of less than or equal to 10%. The reflective layer includes a specific amount of EVA resin with a VA content of 15-25%, white pigment and insulating reinforced nano filler. The adhesive layer includes EVA resin with a VA content of 30-40% and composite silane coupling agent (including vinyl silane and isocyanate silane compounded at a mass ratio of 1-5:1) prepared at a weight ratio of 100:0.1-2. The white photovoltaic packaging adhesive film has the advantages of high reflectivity, high body resistance, strong peeling strength and peeling strength after hygrothermal aging, excellent corrosion resistance and PID resistance, and no white overflow.