2251 results about "Composite film" patented technology

The invention discloses a wafer composite film and a preparation method thereof, and belongs to the technical field of semiconductor preparation. The method comprises the following steps: (1) performing hydrogen ion or hydrogen-helium mixed ion implantation on a piezoelectric wafer to obtain an implanted wafer, wherein the implanted wafer sequentially comprises a thin film layer, an implanted layer and a residual layer; (2) sequentially forming a defect layer and an isolation layer on the supporting substrate; (3) bonding the isolation layer and the thin film layer of the injected wafer to obtain a bonding body; and (4) laser is adopted to heat the injection layer, then annealing heat treatment is carried out on the bonding body to achieve complete stripping, polishing and cleaning of the film, then the wafer composite film is obtained, the wavelength of the laser is 100-700 nm, the power of the laser is 50 mw to 100 w, and the scanning speed of the laser is 10-50 mm / s. According to the method, complete stripping of the composite film and combination of laser and thermal annealing processes can be effectively achieved, the method has high process stability, the yield of the composite film can be greatly improved, and the processing time cost of the composite film is shortened.

The invention relates to the field of anticorrosive paint, in particular to anticorrosive paint containing lanthanum cerium oxide and a preparation method of the anticorrosive paint. The invention relates to an anticorrosive coating containing lanthanum cerium oxide. The anticorrosive coating is prepared from the following raw materials: 28 to 45 parts of ultraviolet stable composite film forming matter, 5 to 10 parts of composite rare earth filler, 6 to 12 parts of supported synergistic antirust agent, 18 to 30 parts of mixed solvent, 0.8 to 2.5 parts of dispersing agent, 2.7 to 5.3 parts of functional additive and 0.5 to 1.2 parts of nano montmorillonite, the composite rare earth filler is lanthanum cerium oxide-hydroxyapatite composite powder with a core-shell structure, wherein lanthanum cerium oxide is used as a core, hydroxyapatite is used as a shell, and the thickness of the shell layer is 10-20 nm; the ultraviolet stable composite film forming substance comprises epoxy resin and ultraviolet grafting modified polyurethane in a weight ratio of 1: (0.6-2.2); the supported synergistic antirust agent is a mixture of mesoporous silica supported benzotriazole and zinc molybdate. And the obtained coating is high in adhesive force and long in service life.

The invention relates to the technical field of research and development of BIB liquid packaging materials, and discloses a PE-PA-based composite film, a manufacturing process and an application in BIB liquid packaging, and specifically comprises the following steps: synthesizing a PE-PA compatilizer; the preparation method comprises the following steps: carrying out ring-opening reaction on an epoxy functional group of a PE-PA compatilizer and an amino functional group or a carboxyl functional group at a PA resin molecular chain end to prepare PE-PA compatilizer grafted nylon resin, and carrying out physical anchoring action on a long-chain alkane structure on the PE-PA compatilizer grafted nylon resin and a PE resin molecular chain to prepare the PE-PA alloy master batch; low-density polyethylene resin is used as a raw material of a supporting layer, PE-PA alloy master batch is used as a raw material of a functional layer, metallocene polyethylene resin is used as a raw material of a heat sealing layer, a three-layer co-extrusion blow molding film forming technology is adopted, the PE-PA composite film is prepared, and the film product is excellent in comprehensive performance and can be used for manufacturing a BIB bag body.

The invention discloses a silk protein-MXene composite film and a preparation method thereof. The silk protein-MXene composite film sequentially comprises a conductive surface layer, a porous response layer and a supporting bottom layer from top to bottom, the invention relates to the technical field of composite films. According to the fibroin-MXene composite film and the preparation method thereof, a three-layer gradient structure is formed by the conductive surface layer, the porous response layer and the supporting bottom layer, good conductivity and electromagnetic shielding effectiveness are ensured by utilizing oriented arrangement of MXene of the conductive surface layer, gallic acid and MXene form a hydrogen bond network, and nitrogen-doped carbon quantum dots coat the surface of MXene to form a physical barrier, so that the electromagnetic shielding effect is improved, and the electromagnetic shielding effect is improved. Through double oxidation resistance of gallic acid and nitrogen-doped carbon quantum dots, a sponge body structure formed by the porous response layer is matched to endow the composite film with high-sensitivity response to external stimulation, the supporting bottom layer is crosslinked by hexamethylene diisocyanate and enhanced by nanocellulose, the tensile strength is improved, and the tensile strength of the composite film is improved. And the contradiction between the mechanical property and the conductivity of the traditional composite film is effectively solved.

The invention discloses a reinforced composite PCB and a preparation method thereof, and belongs to the technical field of PCB preparation. The preparation method of the reinforced composite PCB comprises the following steps: step 1, processing an inner-layer core board to obtain a preprocessed inner-layer core board; 2, cutting, drilling and activating the modified composite film to obtain a treated modified composite film; and 3, sequentially carrying out stacking, hot pressing treatment, pressure relief, cooling, drilling, hole metallization treatment, outer layer pattern transfer, pattern electroplating, outer layer etching, resistance welding, surface treatment, molding and testing on a copper foil, a prepreg, the pretreated inner layer core plate, the prepreg, the treated modified composite film, the prepreg, the pretreated inner layer core plate, the prepreg and the copper foil. And the composite PCB is obtained. The circuit board prepared by the method has excellent thermal stability and mechanical properties.

The invention relates to the technical field of film temperature sensors, in particular to a film preparation method based on the sputtering technology, a temperature-sensitive film and a temperature sensor.The temperature sensor comprises an adhesion layer, an insulation layer is arranged on the adhesion layer, a temperature-sensitive layer is arranged on the insulation layer, the adhesion layer is made of NiCrAlY materials, the insulation layer is made of high-melting-point metal oxide materials, and the temperature-sensitive layer is made of high-melting-point metal oxide materials. The temperature-sensitive layer is an ITO-Al2O3 composite film with the mass ratio of Al to In being 1-10 wt%, the adhesion layer of the temperature-sensitive film is used for being adhered to a measured component, and a platinum wire is led out of the temperature-sensitive layer of the temperature-sensitive film to transmit electric signals. Compared with a pure ITO thin film temperature sensor not doped with Al2O3, the thin film temperature sensor based on the temperature-sensitive thin film has the advantages that a repeatability error order of magnitude is remarkably reduced, and the measurement reliability of the thin film temperature sensor based on the temperature-sensitive thin film under an extreme working condition is effectively guaranteed.

The invention belongs to the technical field of semiconductor material manufacturing, and particularly relates to a preparation method of a piezoelectric single crystal composite film material, which comprises the following steps of: carrying out ion implantation on a piezoelectric functional material, carrying out wet oxidation treatment on the surface of a support substrate, and then cleaning and blow-drying to obtain the piezoelectric single crystal composite film material. Oxygen and nitrogen mixed plasma is used for activating the surfaces of a supporting substrate and a piezoelectric functional material, pre-bonding, standing, nitrogen annealing, thinning and stripping are carried out in a low-vacuum environment, the preparation method is simple in process and low in cost, and the composite film prepared through the method is high in bonding strength, free of damage to a stripping interface and good in bonding performance. And meanwhile, cracking and fragmentation are effectively avoided, the yield is effectively improved, and industrial production is facilitated.

A preparation method of a bacteriostatic and antioxidant zein / hyaluronic acid degradable preservative film relates to the field of foods.The method comprises the steps that a zein-hyaluronic acid solution and a citrus polyphenol solution are mixed, distilled water is dropwise added, vacuum concentration is performed, the mixture is mixed with a laminarin solution, auxiliary materials are added, uniform mixing, bubble removing and film preparing are performed, and the preservative film is obtained. After drying, obtaining a zein-HA film of laminarin and citrus polyphenol; or mixing the zein-hyaluronic acid solution with the moringa oleifera leaf extract powder, dropwise adding distilled water, concentrating under reduced pressure, mixing with the laminarin solution, adding the sodium alginate solution and auxiliary materials, defoaming, pouring to form a film, and drying to obtain the zein-HA film of the laminarin and the moringa oleifera leaf extract. The synergistic effect among the substances of the protein film can effectively improve the fresh-keeping effect of the composite film, and the release property of the composite film can further improve the fresh-keeping effect on fresh-cut food.

The invention provides a lead zirconate titanate composite film with a high electro-optical coefficient, a preparation method of the lead zirconate titanate composite film and an electro-optical modulator, the lead zirconate titanate composite film comprises an insulating substrate, a buffer layer and a ferroelectric main body layer which are sequentially stacked, and the buffer layer is a lanthanum-doped lead zirconate titanate film; the ferroelectric main body layer is a lead zirconate titanate thin film and has (001) / (100) orientation. The composite film has a relatively high electro-optical coefficient, relatively low driving voltage and relatively high thermal stability.

The invention discloses vacuum coating equipment for coating an anti-fingerprint film and a coating method. The coating method comprises the following steps: performing plasma activation treatment on the surface of a glass substrate to form an activated substrate; a gradient transition layer is deposited on the surface of an activated substrate, a Cr-Si composite transition layer with continuously changing components is formed by alternately adjusting sputtering power of a metal target and a non-metal target, a fluorocarbon polymer main film layer is deposited on the transition layer substrate, and C4F8 gas is controlled by adopting a pulse magnetron sputtering process to generate an anti-fingerprint functional layer substrate with uniform thickness; stepwise in-situ annealing treatment is carried out, and a densified composite film layer structure is formed through segmented heating and heat preservation; performing plasma surface modification on the surface to form a low-surface-energy chemical group, and finishing functional treatment; through combination of a composite coating process and an intelligent control technology, cooperative regulation and control of anti-fingerprint film interface strengthening, function construction and structure optimization are realized in a single vacuum environment.

The present invention belongs to the field of plating technology and specifically relates to an ALD-Parylene composite film layer, a deposition device, and a deposition method thereof. By reserving a vacuum gap between a heating plate and the outer wall of a cavity, a barrier is formed to isolate the heating plate from heat conduction to the outside of the cavity as the vacuum degree in the cavity increases during the reaction process, thereby avoiding heat loss caused by direct contact and damage to seals, thereby improving the coating effect. The ALD reaction and the Parylene reaction are combined in the same reaction chamber, and different pipeline designs and time-sharing control are used to form a composite film layer structure of alternating ALD film layers and Parylene film layers on the surface of the substrate. The density of the ALD film layer is conducive to enhancing the water resistance of the film layer and sealing the defects of the original Parylene film layer. The softness of the original coating is maintained, and it will not break when subjected to impact and thermal shock, which is conducive to improving the stability of the film layer.

The invention provides an intelligent antibacterial konjac glucomannan composite film and a preparation method thereof. The intelligent antibacterial konjac glucomannan composite film is prepared by carrying out graft copolymerization on oxidized konjac glucomannan OKGM and amino-functionalized poly (N-isopropylacrylamide) PNIPAM-NH2 and then crosslinking with an antibacterial agent, the tail end of a molecular chain of the amino-functionalized poly (N-isopropylacrylamide) is provided with an amino group. The intelligent antibacterial konjac glucomannan composite film disclosed by the invention has temperature responsiveness, can control the release of an antibacterial agent according to environmental changes, ensures that the antibacterial agent is accurately released as required, and effectively prolongs the food preservation time and the food shelf life. The film is good in biocompatibility, has no obvious toxic reaction on human tissues and cells, and provides possibility for application in the field of biomedicine. Besides, the film has degradability, and the OKGM and the chitosan are natural high polymer materials and can be decomposed into harmless substances by microorganisms in the natural environment, so that the film meets the requirements of environmental protection and is beneficial to reducing environmental pollution.

The invention relates to a biaxially oriented polypropylene composite film for a capacitor and a preparation method of the biaxially oriented polypropylene composite film. The biaxially oriented polypropylene composite film is of an ABA three-layer structure; wherein the layer A is prepared from the following raw materials: PP, a nucleating agent and a composite filler of MAH-g-PP and nanoparticles; the layer B is prepared from the following raw materials: PET master batch, modified silicon dioxide and a brush polymer. According to the preparation method, the three-layer structure composite film is prepared, the layers are firmly combined through covalent bonds, hydrogen-bond interaction and the like, and the interlayer peel strength is remarkably improved; a nano particle filler with a high dielectric constant is introduced into the A-layer structure, so that the dielectric strength of the film is improved, and meanwhile, the film has relatively high anti-breakdown strength; and the layer B effectively improves the mechanical stability of the film material, and has higher mechanical property and material rigidity compared with the traditional PP film.

The invention belongs to the field of functional nano materials, and relates to a method for large-scale preparation of monoclinic phase vanadium dioxide nano powder, a heat insulation film and application of the heat insulation film, and large-scale preparation of the monoclinic phase vanadium dioxide nano powder is successfully achieved by combining a coprecipitation method with low-temperature calcination. The obtained product has excellent size uniformity (the average particle size is 65 + / -10 nm) and an adjustable phase change characteristic (61-68 DEG C). The polymer-based composite film prepared based on the nano powder shows excellent optical performance, and the method has the advantages of mild reaction conditions (less than or equal to 600 DEG C), controllable product morphology and phase transition temperature and the like, and provides a reliable solution for industrial production of nano functional materials for intelligent windows.

The invention discloses a chitosan-carrageenan blended composite membrane containing a sand fruit peel extract and Vc and a preparation method thereof. The preparation method comprises the following steps: preparing the sand fruit peel extract, preparing a chitosan and carrageenan composite membrane forming solution, mixing the sand fruit peel extract and Vc, and finally selecting a proper membrane forming method to prepare the chitosan-carrageenan blended composite membrane. The natural and degradable biological composite membrane with good antioxidant and antibacterial capabilities is prepared. The composite membrane is prepared from the following raw materials in parts by mass: 1 to 3 parts of chitosan, 0.5 to 1.5 parts of carrageenan, 0.1 to 0.5 part of a sand fruit peel extract, 0.1 to 0.3 part of Vc, 0.4 to 1.2 parts of glycerol and 0.01 to 0.5 part of tween-80. The composite film has the characteristics of good mechanical property, strong water retention capacity, obvious antioxidant and antibacterial effects, natural degradability and the like.

The invention relates to the technical field of composite film defect detection equipment, and particularly discloses low-dielectric polyimide composite film defect detection equipment and a detection method thereof.The low-dielectric polyimide composite film defect detection equipment comprises a rack, the top end of the rack is fixedly connected with an assembly frame, and one side of the assembly frame is rotationally connected with a first guide roller; the part, located on the lower side of the first guide roller, of the assembly frame is rotationally connected with a second guide roller, the part, located on one side of the first guide roller and the second guide roller, of the assembly frame is fixedly connected with an ion wind bar, and the part, located on one side of the ion wind bar, of the assembly frame is provided with a first ash removal mechanism; a second dust removal mechanism is arranged on the side, located on the first dust removal mechanism, of the assembly frame, a first tensioning roller is arranged on the side, away from the second dust removal mechanism, of the assembly frame, through the synergistic effect of the multiple stages of dust removal units, the dust removal effect on the surface of the low-dielectric polyimide composite film is improved, and interference of residual dust on detection accuracy is effectively avoided.

The invention belongs to the technical field of multifunctional heat-conducting materials, and relates to a heat-conducting super-hydrophobic flexible film and a preparation method thereof. Comprising the following steps: adding boron nitride powder into a mixed solution of isopropanol and deionized water to obtain a boron nitride solution; ultrasonically stripping the boron nitride solution, centrifuging, washing and drying to obtain boron nitride nanosheets; the preparation method comprises the following steps: dispersing boron nitride nanosheets in a mixed solution of N, N-dimethylformamide and tetrahydrofuran, carrying out ultrasonic treatment, adding thermoplastic polyurethane, and heating and stirring until the thermoplastic polyurethane is completely dissolved to obtain a TPU / BNNSs spinning solution; preparing the TPU / BNNSs spinning solution into a fiber film through an electrostatic spinning process, drying and stripping to obtain a TPU / BNNSs composite film; siO2 is added into a PDMS solution, ultrasonic dispersion is performed to obtain a mixed solution, the mixed solution is sprayed on the surface of the TPU / BNNSs composite film, and the heat-conducting super-hydrophobic flexible film is obtained after drying and curing. The problem that the performance of a traditional heat conduction material is reduced in a complex environment is effectively solved, and the heat conduction material is suitable for application scenes needing to meet the heat dissipation and antifouling requirements at the same time.

The utility model relates to the technical field of winding equipment, in particular to a winding device for high-barrier composite film production, which comprises a support fixedly mounted on the ground, a round rod rotatably penetrates between opposite side surfaces of the support, and two ends of the outer wall of the round rod are fixedly connected with turntables. A plurality of clamping grooves are annularly formed in the side faces of the rotating discs at equal angles in a penetrating mode, grooves are formed in the clamping grooves, and a plurality of winding rollers are annularly distributed between the two rotating discs at equal angles, detachably connected with the two rotating discs and used for winding the composite film. According to the utility model, the plurality of winding rollers are annularly and detachably connected between the two turntables at equal angles, so that when one winding roller performs winding operation on the composite film, other winding rollers which wind the composite film can be detached from the two turntables, and the operation of taking the film and winding the film at the same time is realized; therefore, the winding efficiency of the composite film can be improved.

The invention relates to the technical field of composite film preparation, in particular to a multi-additive synergistic enhanced degradable packaging composite film and a preparation method thereof, and the multi-additive synergistic enhanced degradable packaging composite film comprises a matrix material group, a barrier system, an anti-hydrolysis system and a stable system; the base material comprises the following components in parts by mass: 25-35 parts of polylactic acid; 15 to 25 parts of poly (butylene adipate / terephthalate); and 8-15 parts of thermoplastic starch. Through multi-dimensional collaborative design of the matrix material, the barrier system, the hydrolysis-resistant system and the stable system, the performance bottleneck of a traditional material is broken through, and the contradiction between brittleness and flexibility is solved through rigid-flexible blending of matrix components; according to the present invention, the uniform dispersion and the interface strengthening of the nano-filler are ensured by using the melt co-extrusion and the directional arrangement technology, and the composite film prepared by using the process has characteristics of excellent degradation rate, high strength, high barrier property and environmental adaptability, can be widely used in the high-end fields of cold chain food and medicine packaging, and solves the problems existing in the traditional technology.

The invention discloses a preparation method of a QCM formaldehyde gas sensor based on a UiO-66-NH2 / V2CTx composite material, and belongs to the technical field of nano gas sensors, V2CTx MXene is prepared by adopting an etching method, the UiO-66-NH2 / V2CTx composite material is synthesized in situ through a solvothermal method to obtain the UiO-66-NH2 / V2CTx composite material, then a composite gas-sensitive film is prepared on the surface of a QCM crystal oscillation sheet by utilizing a spraying method, and the UiO-66-NH2 / V2CTx composite material is used for preparing the QCM formaldehyde gas sensor based on the UiO-66-NH2 / V2CTx composite material. The QCM formaldehyde gas sensor based on the UiO-66-NH2 / V2CTx composite film is manufactured, the obtained sensor has good response sensitivity, the formaldehyde response / recovery speed is high, and the response sensitivity is obviously superior to that of a single material film.

The invention relates to the technical field of packaging composite film production, in particular to a packaging composite film production winding device and system.The packaging composite film production winding device comprises a working box, a winding mechanism, a conveying roller and a tensioning mechanism and further comprises a regulation and control assembly; the regulation and control assembly comprises a feeding support, a fixing support, an adjusting plate, a bidirectional driving mechanism, a flattening component and a guide-in component. The feeding support is fixedly installed on one side of the working box, the fixing support is fixedly installed on the side, close to the feeding support, of the working box, the two adjusting plates are installed on the two sides of the fixing support in a sliding mode, the two-way driving mechanism is installed on the fixing support, each adjusting plate is provided with a flattening component, and the guide-in component is installed on the feeding support. According to the winding device, the folded composite film can be automatically pulled and flattened in time through the arranged components when the composite film is wound, and then the final winding quality is guaranteed.

A glass panel is provided, including a glass panel substrate and a composite film layer disposed on a surface of the glass panel substrate. The composite film layer includes a first base layer, a first barrier layer, a diamond-like carbon film layer, a second barrier layer, a second base layer, and an anti-fingerprint layer that are sequentially stacked. The glass panel is coated with the composite film layer having a specific structure on the surface of the glass panel substrate, so that the glass panel can have high Mohs hardness, to improve a scratch resistance capability of the glass panel. In addition, the composite film layer has strong adhesion to the surface of the substrate and is not easily detached. The composite film layer can further reduce a color difference before and after coating to a specific extent, and increase transmittance.

The invention relates to the technical field of PVB (polyvinyl butyral) films, in particular to a full-wave-band heat-shielding modified PVB composite film as well as a preparation method and application thereof. The full-band heat shielding modified PVB composite film provided by the invention is of an asymmetric structure and comprises a modified PVB matrix and a heat shielding coating covering one side of the modified PVB matrix, the modified PVB matrix is prepared from the following components: polyvinyl butyral and an epoxy silane coupling agent; the heat shielding coating comprises the following components: CsWO3 nano powder, ZnO nano powder, water-based acrylic resin and a composite dispersion system; the composite dispersion system comprises triethylene glycol di-2-ethylhexoate, polyvinylpyrrolidone and diethylene glycol monobutyl ether. The full-wave-band heat shielding modified PVB composite film provided by the invention can realize 780-2500nm full-wave-band near-infrared high-efficiency barrier, improve the binding force and performance stability of a heat shielding coating, and meet the production requirements of light weight, environmental protection and industrialization at the same time.

The invention provides a metal ion cross-linked nano cellulose composite film as well as a preparation method and application thereof, and belongs to the technical field of cellulose film preparation. The preparation method of the metal ion cross-linked nanocellulose composite film comprises the following steps: mixing nanocellulose dispersion liquid and nanosheet dispersion liquid to obtain mixed dispersion liquid; applying a metal ion aqueous solution to the filter membrane with the lyophilic surface to form a liquid membrane on the lyophilic surface; pouring the mixed dispersion liquid on the surface of the liquid film and standing for a period of time, super-spreading the nanosheets on the surface of the liquid film and performing oriented arrangement, and then performing cross-linking curing on the metal ions, the nanocellulose and the nanosheets to obtain a composite film; and drying the composite film to obtain the metal ion cross-linked nano cellulose composite film.

The invention relates to a temperature sensor integrated with a bearing and a preparation method and application thereof, and relates to the technical field of bearing diagnos.The temperature sensor comprises a multi-layer composite film resistance grid structure, and a composite film sequentially comprises a bearing substrate, a transition seed layer, an insulating layer, a sensing layer and a wear-resistant protective layer from inside to outside; by adding the transition seed layer between the bearing substrate and the insulating layer, the binding force between the insulating layer and the bearing substrate is enhanced, the probability of sensor failure caused by large difference of thermal expansion coefficients of the insulating layer and the bearing substrate is reduced, and the use effect of the sensor is improved; in-situ real-time temperature sensing is realized by adopting a scheme of coating a film on a bearing raceway, the scheme starts from the source of a fault, an intelligent diagnosis technology and criterion based on the temperature of a bearing contact area are formed, bearing fault detection methods are enriched, forward guidance is formed for bearing design, and the bearing fault detection efficiency is improved. And a new idea is provided for an aviation high-speed light-load bearing fault diagnosis technology.

The invention relates to the technical field of nanocellulose, in particular to a preparation method of a lignin-containing nanocellulose / polyvinyl alcohol composite film. The preparation method comprises the following steps: (1) mixing corn straw particles with a maleic acid aqueous solution, heating, stirring, pretreating, then adding deionized water for quenching reaction, filtering, and washing a filter cake with water until filtrate is neutral; (2) dispersing the filter cake into deionized water, and performing ultrasonic treatment to obtain an LCNFS suspension; and (3) uniformly mixing a polyvinyl alcohol aqueous solution with the LCNFS suspension, then adding glycerol, stirring, pouring the mixture into a polytetrafluoroethylene mold, and air-drying at room temperature to obtain the lignin-containing nanocellulose / polyvinyl alcohol composite film. By adding the LCNFS, the mechanical property of the PVA composite material film is remarkably improved, so that the PVA composite material film has higher tensile strength and elongation at break, can meet application scenes with higher performance requirements, and has the advantages of degradability and cyclic utilization.

The invention belongs to the technical field of food packaging and fresh-keeping materials, and discloses an ethylene adsorption and pH / pectinase double-response intelligent antibacterial composite film as well as a preparation method and application thereof. The composite film comprises a base film and a functional carrier distributed in the base film, the functional carrier is a material ZIF-8-cinnamyl aldehyde-pectin capable of adsorbing ethylene and responding to pH and pectin, and the base film comprises a film-forming polymer and a natural antibacterial agent. According to the composite film, efficient adsorption of ethylene released in the storage period of fruits and vegetables is achieved through a porous structure of ZIF-8, meanwhile, a synergistic effect is formed by an acid environment naturally generated in the fruit and vegetable ripening and rotting process and pectinase, and intelligent slow release of cinnamyl aldehyde loaded on ZIF-8 is accurately triggered; cinnamyl aldehyde can form a double-channel intelligent antibacterial system with the natural antibacterial property of chitosan in a film base material and the metal ion antibacterial property of ZIF-8, maturation and aging of typical respiratory climacteric fruits and vegetables can be remarkably delayed, and the antibacterial film has extremely high industrial application potential.

The invention discloses an antireflection film, a preparation method thereof and an optical device, and relates to the technical field of optics, the method comprises the steps that a composite material film layer is deposited on a substrate, the composite material film layer comprises a first material and a second material, and the etching rate of the first material is different from that of the second material during wet etching or dry etching; performing wet etching or dry etching on the composite material film layer to obtain a porous film layer; and sequentially carrying out cleaning treatment and drying treatment on the porous membrane layer. According to the anti-reflection film, the preparation method thereof and the optical device, the anti-reflection film of a porous structure is prepared by combining a coating technology commonly used in the industry and laboratories with a wet or dry etching method, equipment hardware does not need to be transformed, and the anti-reflection film is efficient and low in cost.

The invention discloses a bionic microstructure multifunctional composite film and a low-temperature in-situ preparation method thereof, the film is composed of a biomass polymer matrix layer, a nano composite structure layer of uniformly dispersed metal oxide nanowires and two-dimensional transition metal carbides, and a surface bionic microstructure layer, wherein the bionic microstructure layer comprises micron bulges and nano fluff which are periodically arranged; the preparation method comprises the following steps: carrying out ultrasonic-centrifugal synergistic dispersion on the biomass polymer and the nano functional material; a three-dimensional porous structure is constructed through template-assisted freezing forming; and the pulse plasma assists in chemical vapor deposition in-situ growth of the bionic microstructure. The resistance change rate of the film under 100% strain is lt; 5%, the O2 / CO2 selective transmission ratio reaches 12: 1, the tactile sensitivity is 35 kPa <-1 >, and the electrochromic response time is lt; the water contact angle is gt in 50s; 150 DEG C; the technical problem that multifunctional integration, low-temperature preparation and environmental friendliness are difficult to consider at the same time is solved, and the method can be widely applied to the fields of flexible electronics, intelligent packaging, bionic sensors and the like.

The utility model discloses a continuous multilayer copper-graphene composite film and a preparation device thereof, and belongs to the field of copper-graphene composite film preparation. According to the device disclosed by the utility model, the copper-graphene composite film layer is prepared on the surface of the copper foil by arranging the copper-graphene composite film layer preparation unit, and a graphene film in the prepared copper-graphene composite film layer can keep integrity; in the whole preparation process, the composite film can be continuously prepared and obtained only by keeping continuous winding and unwinding of the copper carrying roller and the composite material winding roller, a subsequent pressing treatment procedure is not needed, the phenomenon of poor quality caused in the pressing process is avoided, the continuity and stability of the preparation process of the composite film are guaranteed, and the production efficiency is improved. The layered composite film with good combination can be obtained, and the technical problem that an existing device is low in preparation efficiency is solved.