545 results about "Film base" patented technology

The invention discloses a light conversion film based on a benzotriazole compound as well as a preparation method and application of the light conversion film. The benzotriazole compound is a compound as shown in a formula I, and the definition of each group in the formula I is described in the specification. According to the invention, cyano modification is carried out on the benzotriazole compound used as the light conversion agent, so that the transmission of ultraviolet light is further reduced, the external quantum efficiency response of the heterojunction cell is improved, and the power of the assembly is improved.

The invention belongs to the technical field of waterproof and moisture permeable membrane materials, and particularly relates to a bio-based microporous membrane based on a template and a preparation method and application thereof, and the preparation method comprises the following steps: dispersing one of polybenzimidazole, aminated PI and carboxylated PBO and modified CNF into a DMF / water system; performing electrostatic spinning on the high-viscosity spinning solution; carrying out low-temperature vacuum drying treatment on the modified nanofiber self-supporting framework; coating and filling the bio-based polyurethane resin into the bio-based microporous membrane template, and carrying out negative pressure adsorption until the filling is uniform; and carrying out gradient drying on the bio-based wet membrane to obtain the bio-based microporous membrane. Compared with the prior art, the problems that in the prior art, the mechanical property or stability of bio-based polyurethane is insufficient, and a nanofiber reinforcing technology is difficult to combine with the bio-based polyurethane are solved. A nanofiber self-supporting framework with a stable structure is prepared through an electrostatic spinning technology, and then the nanofiber self-supporting framework is compounded with bio-based polyurethane to form a microporous membrane layer with waterproof and moisture permeable functions.

The present disclosure relates to methods and apparatus for characterising an interaction between a stimulus and a liquid thin film. An aspect of the disclosure provides a spectroscopic ellipsometry apparatus for characterising an interaction between a stimulus and a liquid thin film, the apparatus comprising: a stimulator, configured to provide a stimulus to a liquid thin film disposed on a volume of liquid to generate a wave in the liquid thin film, the liquid thin film and the volume of liquid having an interface therebetween, light beam optics for illuminating an area of the liquid thin film with a light beam, the light beam having a first polarisation, and a light collector coupled to a detector for receiving the light beam after reflection by the liquid thin film, the light beam having a second polarisation after reflection by the liquid thin film; a wave measurement module coupled to the light collector and configured to provide surface wave data to characterise a Lucassen wave in the liquid thin film based on the second polarisation.

The invention discloses a high-barrier degradable vegetable and fruit preservative film based on multi-layer compounding and a preparation method thereof, belongs to the technical field of food packaging materials, and aims to solve the technical problem that the barrier property, the mechanical property and the antibacterial property of the degradable vegetable and fruit preservative film in the prior art need to be further improved. The degradable vegetable and fruit preservative film comprises a first layer, a second layer and a third layer which are sequentially laminated, and the first layer is prepared from, by weight, 65-75 parts of polylactic acid, 4-8 parts of maleic anhydride grafted polylactic acid, 2-4 parts of modified carbon nitride, 1-3 parts of alizarin microcapsules, 3-6 parts of modified lignin and 1-2 parts of auxiliary additives; through the synergistic effect of the modified carbon nitride, the alizarin microcapsules and the modified lignin, the barrier property, the mechanical property and the antibacterial property of the degradable vegetable and fruit preservative film are further improved.

The invention relates to the technical field of food fresh-keeping materials, and discloses a preparation method of an intelligent response degradable fruit and vegetable fresh-keeping film based on a Janus structure, the intelligent response degradable fruit and vegetable fresh-keeping film comprises a hydrophobic layer and a hydrophilic layer, the hydrophobic layer is an electrostatic spinning film formed by compounding eugenol-loaded ZIF-8 nano-particles and polylactic acid, and the hydrophilic layer is an electrostatic spinning film formed by compounding eugenol-loaded ZIF-8 nano-particles and polylactic acid. The hydrophilic layer is an electrostatic spinning membrane formed by compounding chitosan and gelatin, the surface of the hydrophobic layer is covered with the hydrophilic layer through an electrostatic spinning technology, the ZIF-8 nanoparticles are synthesized through a room-temperature stirring method, and synthesis raw materials are a 2-methylimidazole methanol solution and a zinc nitrate methanol solution. By means of the pH response characteristic of the ZIF-8 nano-particles, pH value change signals generated in the early stage of fruit and vegetable putrefaction can be sensitively captured, loaded antibacterial components are accurately released through ZIF-8 framework dissociation, targeted inhibition on putrefying bacteria is achieved, passive protection is converted into active intervention, the fruit and vegetable putrefaction process is effectively delayed, the fresh-keeping effect is improved, and the fresh-keeping time is prolonged.

The invention discloses an on-line detection method for surface defects of an EVA (Ethylene Vinyl Acetate) adhesive film based on machine vision, which belongs to the technical field of industrial automatic quality detection and comprises the following steps: acquiring multiband image data of the surface of the EVA adhesive film acquired by a preset multi-angle self-adaptive imaging system; performing background difference processing on the multiband image data to generate a difference image; performing adaptive contrast enhancement processing on the difference image to obtain an enhanced image; extracting texture feature data and morphological feature data from the enhanced image to generate a multi-feature data set; performing dynamic weighted fusion processing on the multi-feature data set to generate a defect probability graph; the defect probability graph is input into the layered detection network for processing, a defect detection result is generated, the technical scheme that multi-angle self-adaptive imaging, multi-feature dynamic fusion and the layered detection network are combined is adopted, the defect imaging quality and feature significance can be improved in a self-adaptive mode, and high-speed accurate detection and dynamic optimization of the surface defects of the EVA adhesive film are achieved.

The invention relates to the technical field of PVB heat-insulating films, in particular to a PVB heat-insulating film based on indium tin oxide and bronze cesium tungsten compounding and a preparation method thereof.The PVB heat-insulating film is prepared from, by weight, 80-120 parts of PVB resin, 20-50 parts of oily plasticizer, 0.1-2.0 parts of silane coupling agent, 0.1-1.0 part of antioxidant, 0.1-1.0 part of ultraviolet light absorber, 1-5 parts of polyethylene glycol derivative and 1-5 parts of compound dispersion slurry, the weight ratio of the indium tin oxide powder to the bronze cesium tungsten powder in the compound dispersed slurry is (5: 5)-(7: 3). According to the PVB heat-insulating film based on indium tin oxide and cesium tungsten bronze compounding and the preparation method, the prepared PVB heat-insulating film has high visible light transmittance and excellent near-infrared light rejection rate, meanwhile, the Faraday cage effect can be effectively avoided, and the signal shielding problem is avoided.

The invention relates to the technical field of film processing, in particular to a temperature-control strong-adhesion assembly line for car cover film production and a compounding technology of the temperature-control strong-adhesion assembly line. The technical problem to be solved by the invention is to provide the temperature-control strong-adhesion assembly line for producing the car cover film and the compounding process thereof, which integrate electrostatic auxiliary lamination, gradient hot pressing and gradient cooling, effectively eliminate bubbles, reduce internal stress and realize high-quality compounding between film layers. A temperature control strong adhesion assembly line for car cover film production comprises a discharging device used for synchronously releasing at least two layers of film base materials to be compounded; the pre-laminating device is arranged at the downstream of the discharging device and is used for primarily laminating at least two layers of film base materials; and the pre-laminating device comprises an electrostatic auxiliary laminating unit and a mechanical extrusion laminating unit. According to the invention, the effects of integrating electrostatic auxiliary lamination, gradient hot pressing and gradient cooling, effectively eliminating bubbles, reducing internal stress and realizing high-quality lamination between thin film layers are achieved.

The invention belongs to the technical field of computer vision and digital media, and discloses a dome-screen film production method and system based on a high-altitude aerial image. Projecting the multi-view aerial video sequence to a unified spherical coordinate system, and constructing a panoramic space with an overlapping region; performing non-rigid geometric deformation processing on the overlapping region of the panoramic space to generate an intermediate image with aligned pixels; calculating the fusion cost of each pixel point in the overlapping region in the intermediate image, and performing path search based on the fusion cost of each pixel point to generate a dynamic suture line; generating an image mask based on the dynamic suture line, performing multi-scale frequency domain adaptive fusion on the intermediate image by using the image mask to generate a fused panoramic image, and remapping the fused panoramic image into a projection format adaptive to dome screen playing to output; and the real reducibility and the manufacturing quality of the dome film are greatly improved.

The invention discloses a low-dielectric polyimide film based on a fluorine-containing triphenylmethane unit as well as a preparation method and application of the low-dielectric polyimide film, and the low-dielectric polyimide film is a novel polyimide material FPOPF-6FDA obtained by polymerizing a fluorine-containing triaryl methane diamine monomer and 4, 4 '-(hexafluoroisopropenyl) diphthalic anhydride. The fluorine-containing triarylmethane diamine monomer is preferably 4, 5-diphenyl-1, 3, 5-triazine. According to the invention, 4, 4 '-((4-fluoro-3-phenoxy phenyl) methylene)) bis (2-fluoroaniline) is used, specifically, 4, 4'-diaminotriphenylmethane is used as a functional core, a fluorine-containing group and a large-volume side chain group are introduced, and non-coplanar twisted conformation destroys close packing of molecular chains and increases the chain spacing, so that the effect of a charge transfer complex (CTC) is weakened, and the photoelectric conversion efficiency is improved. And the heat resistance and optical transparency of polyimide are maintained while the dielectric constant of the material is reduced.

The invention belongs to the technical field of image processing, and particularly relates to a film space position prediction method and system based on machine vision, and the method comprises the steps: collecting a film operation image, extracting a transverse projection value of an edge sub-pixel point, and synchronously obtaining physical field data such as linear speed, mechanical wear and tension; a dynamic drift index is determined by using differential operation, and a steady-state characteristic index is solved by combining fluid dynamics and a physical constant; the spatial displacement of the film in a visual processing hysteresis stage is accurately predicted by calculating the processing time consumption of a visual system based on dynamic drift, steady-state characteristics and a dynamic second-order compensation item, so that a transverse prediction projection value is obtained, and the transverse prediction projection value is further mapped back to a physical spatial position. According to the method, the phase lag problem of visual detection under the high-speed working condition is effectively solved, and the prediction precision and the operation stability of closed-loop control are improved.

The invention belongs to the technical field of food fresh-keeping and antibacterial materials, and discloses a preparation method and application of a bamboo cellulose-based sprayable hydrogel fresh-keeping film. According to the system, bamboo cellulose is used as a structural support and cooperates with epsilon-polylysine and bamboo polyphenol, and a hydrogel coating with physical barrier, antibacterial and antioxidant functions is formed on the surfaces of fruits and vegetables through in-situ self-assembly and calcium ion crosslinking. The method comprises the following steps: compounding sodium alginate, carboxymethyl chitosan and a bamboo fiber nano dispersion liquid, and adding epsilon-polylysine and bamboo polyphenol to prepare a functional spray; a calcium chloride solution is sprayed after spraying, and a stable and transparent hydrogel film with high adhesive force is rapidly formed through ionic crosslinking. The technical process is simple and convenient, the film forming speed is high, the components are natural, and industrial spraying is easy. Verified by fruits and vegetables such as bananas and the like, the coating can effectively delay decay, and the application blank of the nano bamboo cellulose in a spray fresh-keeping carrier is filled.

The application discloses an organic-inorganic hybrid solid electrolyte film based on SiO2 aerogel and a preparation method, and belongs to the technical field of solid-state batteries; the organic-inorganic hybrid solid electrolyte film based on SiO2 aerogel is prepared from the following main raw material components: high-dispersion silica aerogel, lithium salt, polyethylene oxide and flame-retardant polyethylene imine; the high-dispersion silica aerogel is prepared by using N-imidazole propyl trimethoxysilane and tetraethyl orthosilicate as a silicon source by a co-precursor method; the flame-retardant polyethylene imine is obtained by reacting diethyl phosphite with polyethylene imine and then reacting with 1,3-dibromopropane; the lithium salt comprises lithium bis(trifluoromethanesulfonyl)imide; the organic-inorganic hybrid solid electrolyte film based on SiO2 aerogel prepared by the application has high ionic conductivity, excellent thermal stability, flame retardancy and electrochemical stability.

This invention discloses a method for preparing a (111) preferred-oriented perovskite thin film based on substrate control, comprising: providing a substrate; forming a SnO2 electron transport layer on the substrate; forming a zinc oxalate (ZnOX) interlayer on the electron transport layer; and preparing the perovskite active layer on the ZnOX interlayer using a two-step sequential deposition method, wherein the perovskite active layer has a (111) preferred orientation; in this invention, the interaction between oxalate anions and PbI2 induces the formation of a porous PbI2 film, which, combined with Zn... 2+ The defect compensation and lattice regulation effects of the embedded perovskite lattice successfully induced the growth of a (111) preferred orientation perovskite thin film with large grains (up to 3 μm in size) and low defect density, and the (111) / (100) peak intensity ratio was improved by nearly 5 times. This invention achieves the simultaneous optimization of perovskite thin film structure and device performance with a simple and effective interface modification strategy, providing a new path that is both scientific and practical for the industrialization of high-performance long-life perovskite solar cells.

The invention belongs to the field of special adhesives, and discloses an all-polymer super-water-resistant UV pressure-sensitive adhesive capable of being rapidly cured and a formed pressure-sensitive adhesive tape. The pressure-sensitive adhesive is prepared by polymerizing a free radical thermal initiator, a chain transfer agent, an inert organic solvent and 100 parts by mass of (methyl) acrylate at 75-85 DEG C, heating, and carrying out reduced pressure distillation to remove the solvent. The pressure-sensitive adhesive is coated on a PET (polyethylene terephthalate) or BOPP (biaxially-oriented polypropylene) film base material in a hot melting manner or a solution manner, and is irradiated by ultraviolet light to obtain the formed pressure-sensitive adhesive tape. The prepared pressure-sensitive adhesive can be rapidly cured, and the cured pressure-sensitive adhesive tape also has relatively high peel strength, high holding power and stability, has no adhesive residue, and has a wide application prospect in humid and water environments.

The invention relates to the field of PE (polyethylene) protective films, and discloses a PE protective film based on reclaimed materials and a preparation method of the PE protective film. A PE protective film based on reclaimed materials is composed of a PE base material layer and a pressure-sensitive adhesive layer, and the PE base material layer is prepared from the following raw materials in parts by weight: 50-70 parts of a pretreated reclaimed PE material, 15-25 parts of PE resin, 10-20 parts of a flexibilizer, 3-5.5 parts of a filler, 3-6 parts of a compatilizer, 2-4 parts of a slipping agent, 1.5-3 parts of an antistatic agent and 1-2 parts of an antioxidant; preparation of a pretreated recycled PE material: crushing, pickling, mixing with a pretreating agent, melting, extruding and pelletizing; the pretreating agent is prepared from an isobutylene maleic anhydride copolymer, an ethylene-acrylate-methyl glycidyl ester terpolymer and dimer acid polyester polyol. The PE protective film is good in fitting stability, small molecule precipitation is not prone to being generated, oily residues are not prone to being generated during fitting, and the PE protective film is suitable for protection of precise electronic products.

The invention belongs to the technical field of conductive adhesive films, and particularly relates to an ACF adhesive film based on modified PVB resin, an ACF bonding assembly and a preparation method of the ACF adhesive film. The preparation method comprises the following steps: firstly, adding PVB (Polyvinyl Butyral) resin and a compound containing an active reaction group into an organic solvent, and adding nano reinforced particles to prepare composite modified PVB resin; and mixing the composite modified PVB resin with epoxy resin, a cationic initiator, a flexibilizer and conductive particles, and coating to prepare a film, thereby obtaining the anisotropic conductive film ACF. According to the preparation method, the PVB resin is specifically modified and the preparation process is optimized, so that the ACF adhesive film can efficiently and stably capture the conductive particles, the fixing effect of the conductive particles in the adhesive film is improved, and the conductivity and reliability of the ACF adhesive film are further improved.

The invention discloses a bending-resistant high-modulus cover film and a preparation method thereof, and particularly relates to the technical field of cover films, the bending-resistant high-modulus cover film comprises an adhesive film and release paper, the adhesive film comprises a film base material and an adhesive-containing bonding layer arranged on the lower surface of the film base material; the release paper is pressed on the bonding layer; wherein the adhesive is prepared from the following components in percentage by mass: 5 to 20 percent of bisphenol A type epoxy resin, 30 to 50 percent of polyvinyl butyral resin, 10 to 20 percent of organic silicon modified epoxy resin, 6 to 10 percent of modified nano silicon dioxide, 10 to 30 percent of flame retardant and 3.1 to 6.5 percent of additive. The covering film has higher glass transition temperature (Tg) and high bending resistance, can maintain the stability of the material, and reduces the plastic deformation caused by repeated bending; the invention also provides a preparation method of the high-modulus cover film.

The invention relates to a high-moisture-resistance scratch-resistant protective film base film for a polaroid. The base film comprises a functional laminating layer, a protective film layer and a protective film layer from bottom to top, wherein the functional laminating layer comprises intercalation modified montmorillonite, graphene nanosheets, an antistatic agent and optical-grade PET (Polyethylene Terephthalate); the surface wear-resistant layer comprises wear-resistant modified PET (Polyethylene Terephthalate), functional nano filler, an ultraviolet absorbent and optical-grade PET. The functional fitting layer is in contact with a polarizer pressure-sensitive adhesive, the moisture resistance of the film is improved by combining original intercalation modified montmorillonite with a graphene nanosheet, long-acting protection is provided for a polarizer core layer, and meanwhile, an antistatic agent is introduced to ensure that no electrostatic discharge damage risk exists when the protective film is stripped; the wear-resistant layer on the outer surface improves the hardness and scratch resistance of the film through the synergistic effect of modified PET containing silicon and naphthalene ring structures and functional nanofiller; and the middle bonding layer effectively solves the problem of compatibility between the functional bonding layer and the outer surface layer, so that the stability and firmness of the multi-layer co-extrusion structure are ensured.

The metrology system may include an illumination source for generating an illumination beam and an illumination subsystem for directing the illumination beam toward a sample having an inversion-symmetric substrate and one or more films disposed on the inversion-symmetric substrate. The system may further include a filter configured to block wavelengths of the illumination beam and pass wavelengths associated with second harmonics of the illumination beam, and a detector for capturing second harmonic generation (SHG) light. The system may further include a controller for receiving metrology data from the detector associated with the SHG light from an interface between the inversion-symmetric substrate and the one or more films, and generating one or more metrology measurements associated with the one or more films based on the metrology data.

The application belongs to the technical field of metallurgy, and particularly relates to a device and method for preparing high-purity silicon film based on vacuum degree control electrolytic silicon purification. The device creates a closed environment through a vacuum cabin, and utilizes a connected vacuumizing mechanism and a vacuum degree adjusting device to accurately control the vacuum degree in the cabin. A material storage mechanism is used for storing silicon materials, and is composed of a corundum crucible and a graphite crucible sleeved outside the corundum crucible. A heating mechanism heats the materials through electromagnetic induction. The method first heats impurity-containing electrolytic silicon in a vacuum environment in a deimpurification mode, so that impurities with higher saturated vapor pressure are preferentially volatilized and deposited on the inner wall of the cabin, thereby realizing preliminary purification. Then, in an evaporation mode, the purified silicon material is heated to a volatilization temperature again, so that it is vapor-deposited on the upper base material to directly form a high-purity silicon film. The scheme integrates the purification and film forming processes, and simplifies the process.

The invention relates to polylactic acid carbon dots as well as a PLA / PVA (polylactic acid / polyvinyl alcohol)-based full-biodegradable polyester composite material and a preservative film thereof. The polylactic acid carbon dots are prepared by a microwave irradiation method, and the full-biodegradable polyester composite material takes PLA as a main base material, PVA as auxiliary resin, food-grade talcum powder as a filler, the polylactic acid carbon dots as a compatilizer, glycerol and stearic acid as lubricants and B215 as an antioxidant. Performing high-speed mixing and stirring to obtain a modified mixture, extruding and pelletizing the modified mixture to obtain a full-biodegradable polyester composite material, and performing film blowing on the polyester composite material to obtain the full-biodegradable preservative film. The polyester composite material prepared by the invention can be biodegraded under a matured compost condition (the test period is 140 days), the biodegradation rate is 91.79%, the relative biodegradation rate is 97.15%, the products are carbon dioxide and water, and inspection items such as the total migration amount and heavy metals meet standard requirements.

The invention relates to the technical field of sputter coating, in particular to a VOx thin film steady-state growth gas inlet device based on quick response gas control, which is used for injecting reaction gas into a reaction cavity in a VOx thin film sputtering system, a base and a heater arranged in the base are arranged in the reaction cavity, the gas inlet device comprises a reaction gas conveying channel and a gas inlet hole, the conveying channel is connected with an external gas source and conveys reaction gas to the reaction cavity, and the conveying channel is arranged below the base; the air inlet holes are formed in the base table top and communicated with the conveying channel, and the distribution of the air inlet holes in the base table top is that the density of an edge area below a wafer is larger than that of a central area. According to the invention, the inherent deposition non-uniformity of the edge and the center of the wafer is compensated through the non-uniform air inlet holes, so that the uniformity of the film is improved on the whole; the oxygen partial pressure adjusting rate is increased through a shortened gas conveying path, the target voltage fluctuation range is narrowed, and finally steady-state control is achieved.

The invention relates to the technical field of thin-film capacitors, in particular to a standardized and modularized thin-film direct-current support capacitor which can reduce design complexity and cost budget, is convenient to combine and expand, can operate in a high-temperature environment and is high in applicability, and the standardized and modularized thin-film direct-current support capacitor comprises a capacitor unit and a busbar. Each capacitor unit comprises a capacitor shell and a core arranged in the capacitor shell, clamping groove structures matched with each other are arranged on two sides of the outer wall of the capacitor shell, a positioning groove is formed in the inner wall of the capacitor shell, and a lead-out pin of the capacitor unit penetrates through the positioning groove; the film base film of the core is formed by mixing and co-extruding 70%-80% of polypropylene and 20%-30% of cycloolefin copolymer.

The application discloses a grid release film and a preparation method thereof, relates to the technical field of release films, and discloses a grid release film which comprises a film base material and a release layer coated on the surface of the film base material, wherein the film base material is made of PET recycled material which is subjected to hydrolysis treatment and extruded, and the release layer is formed after functional release agent is cured by ultraviolet light radiation, and the functional release agent comprises the following raw materials in parts by weight: 80-110 parts of organic silicon modified polyurethane, 50-75 parts of ethyl acetate, 5-6 parts of a photoinitiator, 15-20 parts of pentaerythritol tetraacrylate, 10-15 parts of nano silicon dioxide, 3-5 parts of an acrylate leveling agent and the like, wherein the organic silicon modified polyurethane is used as the main body to prepare the functional release agent, which is beneficial to the reaction between the functional release agent and the surface of the film base material, and thus the adhesion of the functional release agent on the film base material is improved.

The invention relates to the technical field of PI fiber function modification, and discloses a modified PI fiber, a preparation method and a polyimide film based on the modified PI fiber, and specifically, the surface of the modified PI fiber is grafted with a carbon nanotube / carbon black hybrid conductive network through covalent bonds; the network is constructed by bridging a multifunctional connecting agent containing alkenyl, hydroxyl and a quaternary ammonium salt functional group, the hydroxyl of the connecting agent and an acylating chlorination carbon nanotube form an ester bond, the quaternary ammonium salt group electrostatically adsorbs carbon black, and the residual alkenyl and sulfhydrylated PI fiber are subjected to a sulfhydryl-alkene click reaction under the initiation of ultraviolet light to realize covalent grafting. The modified fiber is used as a functional filler, water-soluble polyamide acid is used as a film-forming matrix, and the flexible composite film is prepared through vacuum filtration and thermal imidization. The electromagnetic shielding effectiveness of the thin film in the X wave band reaches 37dB or above, and the tensile strength is gt; the elongation at break is gt; the cable has the advantages of high shielding performance, excellent mechanical strength and excellent flexibility.

This invention relates to a method for preparing ε-Ga2O3 thin films based on chemical vapor deposition, comprising: placing gallium oxide powder in a heating zone of a quartz tube, and placing a substrate in a deposition zone of the quartz tube; the deposition zone and the heating zone are integrally connected and communicate with each other; a predetermined first distance is maintained between the substrate and the heating zone; a mixture of carrier gas and hydrogen is introduced from one end of the heating zone of the quartz tube; the proportion of hydrogen in the mixture is 5%-10%; the heating zone of the quartz tube is heated to a predetermined temperature under normal pressure and held at the predetermined temperature for a predetermined time, so that the gallium oxide powder is reduced to gallium vapor and water vapor under the action of hydrogen, and at the same time, the gallium vapor and water vapor generate gallium hydroxide and hydrogen in the deposition zone with the flow of the mixture gas, and then the gallium hydroxide is thermally decomposed and deposited on the substrate in the deposition zone, followed by annealing to obtain an ε-Ga2O3 thin film; wherein the predetermined temperature of the heating zone is 900℃-1200℃; and the temperature of the deposition zone is 500℃-850℃.

The invention relates to a method for preparing a rapid hydrochromic mesoporous tungsten oxide film based on a plasma etching technology. The preparation method comprises the following steps: mixing an amphoteric block copolymer template agent with a tungsten source precursor, and coating the surface of a substrate with obtained sol to construct an organic-inorganic hybrid film; then introducing oxygen-containing plasma to etch the hybrid film; and finally loading a catalyst layer on the surface of the film. By utilizing the synergistic effect of high-energy active particles and active oxygen species in the plasma, through coupling of physical bombardment and chemical oxidation / volatilization reaction, the rapid removal of the organic template is realized under a low-temperature condition, meanwhile, the structural integrity of a mesoporous skeleton is kept, and the pore collapse and the specific surface area loss caused by traditional high-temperature calcination are avoided. The obtained mesoporous WO3 thin film has a high specific surface area and abundant surface active sites, and hydrogen diffusion and interface reaction kinetics can be effectively improved, so that the coloring / fading response is remarkably accelerated, and the hydrogen-induced discoloration performance is improved.

The application belongs to the technical field of nanofiltration membrane preparation, and specifically discloses a method for preparing a thin-layer nanocomposite membrane based on an etching method, which comprises the following steps: placing a PVDF microporous filter membrane in a suction filtration device, loading copper-containing nanoparticles serving as an intermediate layer on the PVDF microporous filter membrane through suction filtration; placing the PVDF microporous filter membrane loaded with the copper-containing nanoparticles in a reactor, placing an aqueous solution containing amine monomers on the surface of the PVDF microporous filter membrane, removing the excess aqueous solution containing the amine monomers after soaking, placing an organic phase solution containing an acyl chloride monomer on the surface of the PVDF microporous filter membrane for reaction, removing the excess unreacted organic phase monomers after the reaction is completed, and preparing a thin-layer nanocomposite membrane; washing the surface with an organic solvent and then immersing the thin-layer nanocomposite membrane in an acid solution to complete etching of the intermediate layer, so that an etched thin-layer nanocomposite membrane is obtained. The preparation method is simple, and the thin-layer nanocomposite membrane prepared by the method has the advantages of high flux, high retention, high stability and the like when used for separating organic solutions containing dyes / drugs.

The invention discloses a durable multilayer reflective film and a preparation method thereof. The reflective film sequentially comprises a release layer, a pressure-sensitive adhesive layer, a film base layer, a fiber skeleton layer, a reflective adhesive layer, a microporous buffer layer and a protective layer from bottom to top. The fiber skeleton layer is of a mesh structure formed by interweaving microfibers with the diameter of 1-10 microns, glass beads are mainly distributed in meshes, and the glass beads and the water-based bonding slurry jointly form a fixation structure of mechanical locking and adhesive fixation. The micropore buffer layer is located between the reflective adhesive layer and the protective layer, and communicated micropores are obtained by coating a coating containing a pore-forming agent precursor and dissolving out or thermally decomposing the pore-forming agent. The preparation method comprises the following steps: treating the surface of the base film, laying the fiber skeleton, coating the water-based bonding slurry, spreading the glass beads, curing, preparing the microporous buffer layer, covering the protective layer, coating the pressure-sensitive adhesive on the back surface, and covering the release layer. The reflective film provided by the invention has high glass bead fixation fastness, bending durability and wet reflective performance.