339 results about "Composite film" patented technology

This invention discloses a photocatalytic negative oxygen ion near-field purification eyeglass component and its preparation method. The component includes an eyeglass substrate (lens or frame). From the inside out, the outer surface of the substrate is sequentially provided with a functional film layer, a plasma activation layer, and an outermost composite film layer of nitrogen-doped anatase titanium dioxide supported on a Pt-Au-Ag-Pd quaternary noble metal. This film is responsive to the entire visible light band from 400nm to 700nm and stably generates ≥1000 negative oxygen ions / cm³ within a 30cm near-field breathing zone of the wearer's mouth and nose under normal lighting conditions. It also achieves antibacterial and bacteriostatic effects, degradation of harmful gases, surface self-cleaning, and anti-fogging functions. This invention optimizes the film structure, allowing the photocatalyst to directly contact air and visible light, maximizing catalytic efficiency. It is also compatible with lenses and frames, integrating multiple effects such as eye protection, purification, antibacterial properties, and anti-fogging. The process is universal and mass-producible.

The application discloses a pH-responsive degradable composite bacteriostatic film derived from waste bone powder extract and a preparation method thereof. The main components of the film are collagen and hydroxyapatite extracted from waste bone powder, citric acid monohydrate-betaine and lactic acid-betaine eutectic solvent, and in addition, purple corn anthocyanin is used as a pH response agent, and citric acid monohydrate-betaine eutectic solvent is used as a crosslinking agent and a bacteriostatic agent. In the preparation process, collagen and hydroxyapatite are mixed with an aqueous solution of eutectic solvent and heated, and after the system is reduced to room temperature, the anthocyanin aqueous solution is added, mixed, and ultrasonic defoaming is performed, then the film forming liquid is poured into a clean mold, vacuum dried, and cooled to remove the film. The pH-responsive degradable composite film prepared based on the above method has good properties, not only has the characteristics that the overall color changes with the microenvironment pH, but also has good mechanical strength, bacteriostasis and degradability, and has wide application potential in many fields such as food preservation.

The application discloses a preparation method of a multi-layer composite film system, a conductive thin film and a semiconductor device. The preparation method of the multi-layer composite film system comprises the following steps: preparing a first layer of metal film on a substrate by a vacuum coating method; performing surface roughening treatment on the first layer of metal film; and preparing a second layer of metal film on the first layer of metal film after the surface roughening treatment by the vacuum coating method. The preparation method of the multi-layer composite film system can enhance the adhesion between the film layers by performing the surface roughening treatment on the first layer of metal film, so that the mechanical combination mode is adopted between the film layers, the adhesion between the film layers is improved, some film layers which cannot be combined under vacuum can be effectively connected in the mechanical combination mode, the equipment investment cost is reduced, the multi-layer film system of various types is prepared by a single device, the substrate rework is effectively reduced or prevented, and the production cost is greatly reduced.

The present application relates to a kind of continuous heat sealing conveying equipment of medicinal composite film, including base and heat sealing seat;The composite film entry position of the base is provided with guide frame, wherein guide frame can extrude and discharge air in double-layer composite film and guide;The top edge of the base is fixedly installed with fixed seat, the side of the heat sealing seat is provided with recess, and the inner edge of the recess is hinged with gear.This equipment cooperates with the synergistic effect of pressure roller and inclined groove, by first accurately positioning composite film, then using inclined groove to guide circular seat to move along a specific trajectory, it is stretched and straightened to two sides smoothly;This design not only effectively prevents the wrinkle or deviation of composite film during heat sealing process, but also ensures the uniformity of film material under the action of heat sealing head, so as to significantly improve the sealing quality and appearance uniformity of heat sealing part.

The application discloses a kind of high toughness biomass-based composite film for liquid packaging and its preparation method and application, belong to biomass-based packaging material technical field.The composite film is ABA three-layer co-extrusion structure;A layer is composed of modified PLA, PBAT and lignin-containing cellulose nanofiber;B layer is composed of oligosaccharide modified polyester;A layer master batch and B layer material are prepared respectively, and three-layer co-extrusion molding is obtained.The application uses amide bond to covalently fix oligosaccharide on polyester main chain, solves the problems of existing technology, such as easy migration of antibacterial agent, weak interlayer bonding force and insufficient comprehensive performance;Through multivariate blending, the synergistic improvement of mechanical property and barrier property is realized by using multiple intermolecular forces;ABA three-layer co-extrusion structure is used, and interface firm combination is realized by means of interlayer molecular diffusion and hydrogen bond network.The obtained composite film has high toughness, excellent barrier property and antibacterial property, and is suitable for milk, fruit juice and other liquid food packaging.

The application provides a preparation method of a laser-induced graphene composite film based on a biomimetic multi-level structure, the composite film and application. It relates to the fields of material surface engineering and deicing technology, and the preparation method comprises the following steps: cleaning and drying pretreatment of a polyimide film substrate; through selective scanning by a pulsed laser, a laser-induced graphene layer is generated in situ on the substrate surface synchronously, and a biomimetic multi-level structure containing a periodic microporous array and a three-dimensional porous graphene network is constructed; the product is immersed in a nano-hydrophobic solution for modification and solidification to form a three-level hydrophobic coating; annealing treatment is performed under inert gas protection to eliminate internal stress, and the composite film is obtained after cooling. The film has super-hydrophobicity, low ice adhesion strength and high efficient light-heat conversion capacity. The application aims to solve the safety and efficiency problems in the fields of aviation, wind power, photovoltaic and the like due to the lack of long-acting, stable, low-energy and function-integrated deicing materials.

This application relates to the field of acoustic transducers, and particularly to a high-sensitivity MEMS acoustic device and its fabrication method. The high-sensitivity MEMS acoustic device is composed of an upper electrode layer, a piezoelectric layer, a lower electrode layer, a passive layer, an insulating layer, and a substrate connected in sequence. The multilayer composite film is radially symmetrical on the passive layer. A slit through the center of radial symmetry divides the composite film into several partitions. The upper and lower electrode layers of each partition are respectively provided with pads for signal extraction. The voltage signals of the pads in each partition are extracted through series or parallel connection. This application increases the output voltage by dividing the piezoelectric sensitive composite film into multiple sensitive regions and combining the sensitive regions in series, antiphase superposition, or other forms, thereby improving the sensitivity of the piezoelectric MEMS device.

The utility model discloses a kind of composite film quality detection devices, it is related to composite film detection equipment technical field, including lifting adjustment assembly, clamping assembly, first clamping frame, second clamping frame, first clamping plate, second clamping plate and air cylinder.The utility model first clamping plate and second clamping plate cooperate and carry out clamping fixed processing to composite film, air cylinder telescopic can drive one first clamping plate to move horizontally reciprocating, this first clamping plate is driven first clamping plate on second clamping frame by guide rod and moves horizontally reciprocating, so that first clamping frame and second clamping frame carry out synchronous clamping or relaxation operation, can be synchronously realized to the clamping fixed of composite film upper and lower two ends, it is convenient and fast to operate;After clamping fixed to composite film, open lifting adjustment assembly, lifting adjustment assembly drives second clamping frame to move up, the interval of first clamping frame and second clamping frame gradually expands, can effectively realize the tensile test work to composite film.

This invention relates to the field of functional materials technology, and particularly to a floating defective g-C3N4 / PDI composite thin-film photocatalyst, its preparation method, and its application. The preparation method of the floating defective g-C3N4 / PDI composite thin-film photocatalyst provided by this invention includes the following steps: mixing defective graphene carbon nitride, N,N'-bis(3-aminopropyl)perylene-3,4,9,10-tetracarboxylic acid diimide (PDI), an organic base, and water to obtain a first suspension; mixing the first suspension with a monohaloacetic acid to undergo a protonation reaction, followed by solid-liquid separation to obtain a protonated composite material; mixing the protonated composite material with a thermoplastic resin solution to obtain a second suspension; and forming the second suspension into a film and then drying it to obtain the floating defective g-C3N4 / PDI composite thin-film photocatalyst. This photocatalyst is recyclable after use, does not cause secondary pollution to the environment, and exhibits excellent photocatalytic performance.

This invention discloses a tea tree oil-thyme oil-chitosan composite film, its preparation method, and its application, belonging to the field of food preservation film technology. The preparation method of the tea tree oil-thyme oil-chitosan composite film includes the following steps: dissolving polyvinyl alcohol in water to obtain a polyvinyl alcohol solution; adding glacial acetic acid, chitosan, plasticizer, and emulsifier to the polyvinyl alcohol and mixing evenly; then adding tea tree oil and thyme oil, homogenizing and mixing, and degassing to obtain a film-forming liquid; and drying the film-forming liquid to form a film to obtain the tea tree oil-thyme oil-chitosan composite film. The tea tree oil-thyme oil-chitosan composite film prepared by this invention has excellent antibacterial effects and improves the preservation time of sweet cherries.

The utility model discloses a kind of composite film and packaging bag, the composite film includes first face layer, pattern layer and first heat-seal layer in turn from outside to inside, pattern layer has preset surface texture for forming embossing on first face layer;First face layer is fixedly connected to one side of pattern layer by first showering film adhesive layer, so that the outer surface of first face layer forms embossing;First heat-seal layer is fixedly connected to the other side of pattern layer.The utility model is by first face layer, pattern layer and first heat-seal layer composite structure, with preset surface texture pattern layer as internal physical template, and using first showering film adhesive layer, the texture of first face layer of most outside is copied pattern layer, to form physical embossing. Since the embossing is the physical structure inherent to first face layer rather than external additional coating, therefore have very high wear resistance and stability, fundamentally solve the problem that coating in background art is caused by easy abrasion and fall off and leads to touch effect not lasting.

This invention provides a magnetron sputtering method for preparing a highly bonded alumina / silicon nitride / metal composite thin film, belonging to the field of thin film material preparation technology. The magnetron sputtering method includes the following steps: Step 1, pretreating an alumina substrate to obtain a pretreated alumina substrate; Step 2, using a silicon target as the target material, preparing a silicon nitride layer on the surface of the pretreated alumina substrate by magnetron sputtering; Step 3, after forming the silicon nitride layer on the surface of the alumina substrate, directly switching the power supply to DC sputtering to prepare the metal layer: using a metal element as the target material, preparing the metal layer on the surface of the silicon nitride layer by DC sputtering. The method provided by this invention achieves strong interfacial bonding between the silicon nitride layer and the alumina substrate, and between the metal layer and the silicon nitride layer, improving the stability of the thin film structure and meeting the application requirements of high-performance devices.

A multilayer composite film for a secondary battery pouch having a storage portion concavely processed on one side to accommodate an electrode assembly therein. The multilayer composite film includes a first outer layer; a second outer layer; a barrier layer; and an inner resin layer, wherein the inner resin layer has a PER (Propylene-Ethylene Rubber) content of 5% or more and 40% or less. The composite film of the pouch cell for secondary batteries according to the present invention secures excellent insulation resistance by improving the residual rate after forming.

The application provides a silk fibroin nanofiber composite film and a preparation method and application thereof. The preparation method comprises the following steps: preparing a self-supporting film with an ordered and continuous fiber network framework from a silk fibroin nanofiber dispersion liquid, wherein the fiber network framework serves as a reinforcing phase; contacting the self-supporting film with a solution containing a matrix phase and / or a functional phase, so that the matrix phase and / or the functional phase is filled into the fiber network framework of the self-supporting film to obtain a composite precursor film; and extruding the composite precursor film, or extruding and cross-linking the composite precursor film to obtain the silk fibroin nanofiber composite film. The method of the application adopts a time sequence separation strategy of 'first making a framework and then filling', and the self-assembly ordered structure of the silk fibroin nanofiber is completely reserved. The reinforcing phase, the matrix phase and the functional phase in the obtained composite film synergistically act, and the composite film has high mechanical strength, low swelling rate and functional integrability, and can be applied to the fields of implantable medical devices or biosensors.

The application belongs to the technical field of environmental material synthesis, and particularly relates to a method for synthesizing a composite film by means of NMP-induced surface self-corrosion assisted rapid spin coating and application thereof; the steps are as follows: firstly, PDI and PEDOT are prepared, then a photocatalyst is prepared by means of a microwave method and a surface imprinting technology, and then the photocatalyst is embedded in surface pores of a PVDF film by means of NMP-induced surface self-corrosion assisted rapid spin coating to prepare an imprinting composite film with high stability and high permeability; the imprinting PDI / PEDOT photocatalyst is firmly embedded in the surface pores of the PVDF film, the stability is effectively improved, and a high water flux and a high light degradation activity are maintained. In addition, the construction of a heterojunction structure and the existence of imprinting cavities endow the imprinting composite film with good self-cleaning performance, photocatalytic performance and significant selectivity, and the imprinting composite film has a wide application prospect.

The present application relates to the technical field of biosensor, especially to a glucose sensor based on composite film and a preparation method thereof, after fixing layered MoS2 semiconductor material on a substrate, the present application continues to prepare ion gel film on the substrate, then modifies glucose oxidase on the surface of the ion gel film, after incubation and fixation, modifies a layer of Nafion film on the surface of the ion gel film, because glucose oxidase oxidizes and decomposes glucose to generate protons, with the selective proton passing effect of the Nafion film, the protons pass through the Nafion film to the porous network structure formed by the ion gel film and the layered MoS2 semiconductor material, and cooperate with the cations in the ion gel film to attract more carriers, and form a double-layer structure on the surface of MoS2, cooperate with the current multiplication effect, improve the transmission efficiency of the carriers, and improve the sensitivity of the sensor.

This invention proposes a PBAT / starch-wood vinegar composite film, its preparation method, and its application, belonging to the field of food preservation materials technology. This invention successfully prepared PBAT / starch films with different RWV doping levels using a one-pot melt blending method. This method helps avoid the loss and oxidation of phenolic substances during film processing. During preparation, RWV is initially distributed in the starch phase. With the addition of RWV, the gas barrier properties of the film are enhanced, and it exhibits good release performance in various food simulants. Furthermore, the film of this invention also exhibits excellent antioxidant and antibacterial properties, as well as excellent fruit preservation capabilities. Therefore, the RWV-doped PBAT / starch-RWV composite film of this invention is a food packaging material with good antioxidant and antibacterial properties, meeting the preservation needs of most types of food.

The utility model discloses an environmental protection PVC composite film, this environmental protection PVC composite film includes: base layer, first adhesive layer, second adhesive layer, first surface layer and second surface layer, first adhesive layer and second adhesive layer are correspondingly set respectively in the both sides surface of base layer, first surface layer is correspondingly set in the one side surface of first adhesive layer back to base layer, second surface layer is correspondingly set in the one side surface of second adhesive layer back to base layer, to form multilayer composite structure, base layer is set to be enhanced type modified PVC layer, first surface layer is set to be degradable ultraviolet resistance layer, second surface layer is set to be degradable barrier layer. The utility model discloses an environmental protection PVC composite film is based on the composite forming between base layer, first surface layer and second surface layer, and the degradable composite film with ultraviolet resistance function and water isolation function is obtained thereby, at the same time, while guaranteeing the functionality of PVC composite film, the degradability of PVC composite film is strengthened, and the environmental friendliness of PVC composite film is greatly improved.

This application discloses a jujube seed and Ganoderma lucidum film-coated tablet and its preparation method. The film-coated tablet uses jujube seed and Ganoderma lucidum in a weight ratio of (2.9–3.1):2 as active raw materials, employs a microcrystalline cellulose and erythritol compound as fillers, and combines them with silica, magnesium stearate, and a specific composite film-coating agent. The preparation method includes raw material pretreatment, water extraction, vacuum concentration, vacuum drying, fluidized bed granulation, total mixing and tableting, and film coating, optimizing each process parameter. This application solves the technical problems of existing traditional Chinese medicine extracts, such as high hygroscopicity, poor compressibility, poor stability, and unclear synergistic effects. The prepared product has high active ingredient content, good stability, rapid disintegration, and good patient compliance, making it suitable for large-scale industrial production and possessing good market application prospects.

The application discloses a degradable organic-inorganic composite film and a preparation method and application thereof, and belongs to the technical field of composite materials. The method comprises the following steps: (1) preparing a calcium phosphate nanocluster precursor by using an organic amine stabilizer, a calcium source, a phosphorus source and an organic solvent, and further separating the calcium phosphate nanocluster; (2) mixing the calcium phosphate nanocluster and a natural polymer material to prepare a uniformly dispersed emulsion, wherein the natural polymer material comprises carboxymethyl chitosan and an alginate, and film is prepared by using the emulsion; in the film preparation process, an evaporation-induced self-assembly process occurs, the calcium phosphate nanocluster is phase changed into crystalline rod-shaped hydroxyapatite nanocrystals, and the natural polymer material is combined, so that the degradable organic-inorganic composite film is obtained. The mechanical property of the organic-inorganic composite film is adjustable, the organic-inorganic composite film can be directly degraded in soil, and has a wide application prospect in the fields of packaging, agriculture, medical treatment and the like.

The application relates to a composite film material, a urea-formaldehyde product and a preparation method thereof, and a toilet bowl. The composite film material comprises a modified film material, the modified film material comprises a reinforcing cloth and a PVB matrix coated on the surface of the reinforcing cloth and filled in the reinforcing cloth, the total thickness of the modified film material is 0.1mm-2mm, the modified film material is provided with a plurality of through holes arranged in the thickness direction, and the diameter of each through hole is 1mm-5mm; the grammage of the reinforcing cloth is 10g / m 2 ~120g / m 2 ; the material for preparing the PVB matrix comprises PVB 85-92 parts and a plasticizer 8-15 parts in mass fraction, the total mass fraction of the PVB and the plasticizer is 100 parts, and the viscosity of a 10% PVB ethanol solution at 20 DEG C is 30s-120s. The composite film material has high hardness and high impact resistance, is applied in the urea-formaldehyde product, and is favorable for improving the impact resistance of the urea-formaldehyde product.

The utility model discloses a plastic film capacitor, including shell, capacitor core, the capacitor core is wrapped with the encapsulation layer outside, and the shell sets in the encapsulation layer outside, capacitor core is by four layer composite film laminated winding and is formed, and is provided with nanometer ceramic coating between two adjacent composite films, the end of capacitor core is connected with the lead -out electrode, and the junction of lead -out electrode and capacitor core is provided with reinforcing contact subassembly, and the insulating cover is set up on lead -out electrode, the centre of capacitor core forms the diameter 2 5mm's hole channel, and the heat conduction core column is inserted in the hole channel. The utility model discloses through setting up nanometer ceramic layer between composite film, improves the pressure resistance and thermal stability, through setting up reinforcing contact subassembly, increases the contact area between electrode and capacitor core, prolongs the service life, through setting up the heat conduction column core, cooperates with the radiating fin, has improved the heat dissipation performance, through setting up the insulating cover, has improved the stability.

This utility model relates to the field of capacitor technology, specifically to a combined thin-film capacitor that can improve capacitor reliability. It includes a housing, within which capacitor cores are disposed. The capacitor cores are arranged side-by-side at intervals. The positive electrodes of the two capacitor cores are arranged facing each other and are respectively connected to positive electrode leads. The positive electrode leads are connected to an upper electrode plate, which has two positive electrode leads. The negative electrodes of the two capacitor cores are respectively connected to the two ends of a negative electrode lead, which has two negative electrode leads. An insulating pad is disposed between the upper electrode plate and the negative electrode lead.

The application discloses a drying method of hibiscus flowers. The method comprises the following steps: 1) enzyme inactivation and color protection: the hibiscus flowers are sequentially immersed in an acidic citric acid-vitamin C solution and a solution added with corn stem and leaf water extract, so as to efficiently inactivate oxidase and protect color; 2) composite film construction: a hibiscus leaf extract solution is used as a natural film-forming matrix, is compounded with hydroxypropyl methyl cellulose and the like to form a film-forming solution, the hibiscus flowers are immersed and coated, and a supercritical CO2 drying technology is used to form a uniform and porous protective film on the petal surface; and 3) hot air drying: two-stage gradient temperature and humidity control is adopted for final drying. The application can significantly inhibit enzyme browning and non-enzyme browning in the drying process, effectively reduce the loss of functional components such as anthocyanins and flavonoids, solve the problems of petal blackening, brittleness, fragility and the like caused by traditional drying, and the finished product is full in shape, bright in color, and green in the whole process.

This invention belongs to the field of carbon dot technology in traditional Chinese medicine, and more specifically, relates to cinnamon carbon quantum dots, composite films, their preparation methods, and applications. The cinnamon carbon quantum dots provided by this invention are prepared from cinnamon as raw material through a hydrothermal reaction at 190–210℃ for 9–11 hours, followed by centrifugation and dialysis (molecular weight cutoff 900–1100 Da). The resulting particles are spherical with a particle size of 1.5–3.2 nm and contain O-C=O, C-O, and C-C functional groups on their surface. A composite film is prepared by mixing and drying chitosan, acetic acid solution, glycerol, and the cinnamon carbon quantum dot solution. This composite film, when used for preserving honeysuckle berries, can improve the rate of good fruit, reduce weight loss, and maintain nutritional indicators such as soluble solids, titratable acid, total phenols, ascorbic acid, anthocyanins, and flavonoids. Simultaneously, it reduces malondialdehyde content, inhibits respiration intensity, and maintains fruit firmness. It extends the shelf life by 4 days at 25℃ and by 10 days at 4℃, demonstrating promising application prospects in fruit and vegetable preservation.

In one aspect, the disclosure relates to multilayer composite films comprising a first biopolymer such as agarose, and a second biopolymer such as shellac. In the films, one or both layers may further comprise a biodegradable plasticizer. In a further aspect, the films can be flat or can be thermoformed to have a three-dimensional shape. The films are biodegradable and have very low permeability to water, gases, and other contaminants. Also disclosed are methods of making the films and consumer product packaging materials comprising the films.

This invention discloses a low detection limit fiber optic gas sensor, comprising an input single-mode fiber, a tapered fiber, and an output single-mode fiber. A PDMS / MOF gradient composite film is uniformly distributed in the waist region of the tapered fiber. In the PDMS / MOF gradient composite film, the MOF doping gradient decreases from the outer surface towards the waist region. This sensor, by distributing the PDMS / MOF gradient composite film in the tapered region, leverages the excellent gas adsorption capacity of MOF, the light transmittance and gas permeability of PDMS, and the gradient design of MOF doping to further improve sensor sensitivity and reduce manufacturing costs. Combined with the sensitization mechanism of the dispersion inflection point of the tapered fiber structure, it achieves low detection limit gas detection. Furthermore, the fabrication method is simple and inexpensive.

This application belongs to the field of display technology and relates to a composite thin film, comprising a first thin film and a second thin film stacked together; the first thin film includes a MOF material and an electron transport material, wherein the conductivity of the MOF material is greater than or equal to 5 × 10⁻³ S / m; the electron affinity of the second thin film is greater than or equal to 4.7 eV. This application also relates to a method for preparing the composite thin film, a light-emitting device, and a display device. The technical solution provided by this application can reduce the electron injection barrier of the thin film and improve the electron injection efficiency.

This invention discloses a GaN PMUT device with a low-stress structure featuring isolation trenches and its fabrication method. At the device level, the invention utilizes high-purity GaN single crystals as the piezoelectric layer to achieve higher ultrasonic transduction efficiency. By severing the continuity of the film in the planar direction through isolation trenches penetrating multiple composite films and part of the substrate, a channel and space for releasing accumulated residual stress are provided, effectively reducing the concentration of local residual stress and overcoming array crosstalk problems. At the fabrication method level, this invention determines the design parameters of the GaN PMUT device through finite element simulation. Electrochemical wet etching reduces damage to the epitaxial structure during the stripping process, improving the surface smoothness and uniformity of the device after stripping. Simultaneously, the isolation trenches effectively reduce crosstalk between PMUT units, decrease film stress, and significantly increase the piezoelectric driving bending moment within the film, thereby improving ultrasonic transmission and reception performance.