18 results about "Nanocomposite thin films" patented technology

The invention relates to the field of laser precision welding and functional material engineering, and discloses a high-frequency vibration reliability and function maintenance welding system and method. According to the system and the method, through high-frequency vibration welding spot fatigue strength strengthening, nano composite film functional phase distribution regulation and control, dissimilar material interface electrochemical corrosion inhibition and multi-dimensional performance attenuation monitoring, a high-frequency vibration welding spot is obtained; the problems that in existing femtosecond glue-film-free welding, a welding spot is prone to falling off under high-frequency vibration, the function of a nanometer composite film is invalid after welding, and electrochemical corrosion of a dissimilar material welding interface is serious are solved. Through an innovative algorithm and system design, the reliability of a welding spot in a high-frequency vibration environment is remarkably improved, the functional characteristics of the nano composite film are kept, electrochemical corrosion of a dissimilar material interface is reduced, and a new technical scheme is provided for glue-free film welding in the fields of aerospace, precise instruments and the like.

The application discloses a multifunctional intelligent photovoltaic window which is assembled by a multifunctional variable color unit and a silicon solar cell, and has the characteristics of wide wave adjustment, self-driving and self-cleaning. The laminated structure multifunctional variable color unit mainly comprises a vanadium dioxide / silicon dioxide / polyurethane nanocomposite film, a polymer stable liquid crystal with a near-crystal-cholesteric phase transition, an indium tin oxide and a silicon dioxide coating, which are respectively used as a near-infrared light adjusting layer, a visible light adjusting layer, an electrothermal layer and a super-hydrophobic layer. Based on the above design, the intelligent photovoltaic window can realize dynamic adjustment of the transmittance in the wavelength range of 380-2500 nm, so that the ideal energy-saving effect is achieved. In combination with the high output power of the silicon cell and the excellent direct current heating effect of the indium tin oxide, the self-driving characteristic of the intelligent photovoltaic window is realized, and the energy-saving effect is further improved. In addition, the silicon dioxide super-hydrophobic coating with a contact angle of 150-160 degrees effectively solves the environmental dependence of the intelligent photovoltaic window, and the intelligent photovoltaic window also has a good vision under complex weather conditions such as rain and snow. The application can widen the application of the intelligent photovoltaic window in the fields of energy-saving buildings, automobiles and flexible photoelectric devices.

A structural color image includes a metallic layer, a nanocomposite film, and a dielectric layer between and in direct contact with the metallic layer and the nanocomposite film. The metallic layer reflects visible light. The nanocomposite film reflects visible light and includes metallic nanoparticles in a polymeric material.

The invention discloses a high-temperature energy storage dielectric nano composite film and a preparation method thereof, and belongs to the technical field of polymer-based energy storage dielectric materials. The method comprises the following steps: synthesizing sub-10-nanometer barium strontium titanate relaxor ferroelectric particles coated with PVP (Polyvinyl Pyrrolidone) on the surfaces by adopting a one-step gel method by regulating and controlling the proportion of barium to strontium, uniformly mixing the sub-10-nanometer barium strontium titanate relaxor ferroelectric particles with a polyimide precursor through a wet-process compounding process, and then carrying out casting film scraping and step-by-step thermal imidization treatment to obtain the high-temperature-resistant energy storage composite material with uniformly dispersed nanoparticles. The ultra-small-size barium strontium titanate relaxation ferroelectric particles are introduced, so that the dielectric constant of the composite material can be improved, and meanwhile, the high energy efficiency can be maintained; based on a wet composite process, PVP coated on the surfaces of particles can effectively prevent agglomeration and promote uniform dispersion of the particles in a polyimide matrix, so that the organic-inorganic interface action is enhanced, local electric field distortion is inhibited, a deep energy level trap is introduced, and the dielectric constant and breakdown field strength of the material at high temperature are remarkably improved; and finally, the high-temperature energy storage performance is remarkably improved. By combining relaxation ferroelectric characteristics of ultra-small-size barium strontium titanate with an optimized wet-process composite process, the preparation method has the advantages of low addition amount of inorganic filler, simple and convenient preparation process, remarkable improvement of high-temperature energy storage performance and the like, and can meet application requirements of current and future high-performance high-temperature energy storage dielectrics.

The invention discloses a method for modifying a Bi2Te3 film by combining a pulsed electric field and nano-composite, and belongs to the field of thermoelectric material and film modification research. The invention aims to solve the problem that the existing low-dimensional thin film material is low in photo-thermoelectric performance. The method comprises the following steps: 1, preparing a nano composite film; and 2, pulsed electric field treatment. The method is used for modifying the Bi2Te3 film by combining the pulsed electric field and the nano-composite.

This invention belongs to the field of functional thin film materials technology, specifically relating to a titanium nitride-silver composite thin film material with low infrared emissivity, resistance to damp heat, and resistance to salt spray, and its preparation method. The thin film material is a nanocomposite thin film of titanium nitride and silver, wherein the TiN is a rhombohedral phase TiN with a preferred (015) orientation. 0.58 The grain size is 2.4 nm, and Ag is a cubic phase element with a preferred (002) orientation and a grain size of 2.0 nm; the atomic compositions of Ti, N, and Ag are 59.0%, 36.6%, and 4.4%, respectively, denoted as TiN. 0.62 -Ag 0.08 The thin film material exhibits an infrared emissivity of 0.10 in the 8–14 μm wavelength band, and its emissivity remains below 0.20 even after damp heat and salt spray tests, demonstrating excellent environmental resistance. This invention, through a metal-ceramic nanocomposite structure design, solves the problem of balancing low infrared emissivity and high durability inherent in traditional technologies. It can be widely applied to infrared stealth and surface protection for lightweight unmanned aerial vehicles, possessing significant practical value and strategic importance.

The invention belongs to the technical field of high polymer material synthesis and nano-modification processes, and provides a preparation method of an insulating heat-resistant polyarylene ether nitrile copolymer nano-composite film. The preparation method comprises the following steps: firstly, synthesizing two kinds of polyarylene ether nitrile (bisphenol AP polyarylene ether nitrile copolymer and carboxyl type polyarylene ether nitrile homopolymer) and carboxylic acid type polyarylene ether nitrile coated boron nitride nanosheets (BNNS (at) CPEN); and heating and dissolving the bisphenol AP poly (arylene ether nitrile) copolymer and the ultrasonically dispersed nano filler in N-methyl pyrrolidone, carrying out film casting, and then carrying out gradient heating to remove the solvent so as to prepare the poly (arylene ether nitrile) copolymer nano composite film. The invention adopts a molecular engineering strategy to synthesize a novel organic polymer functional material film with a'fuzzy interface ', and is expected to become a novel flexible dielectric film with'organic-inorganic' interface zero defect. The prepared nano composite film has excellent thermal dimensional stability, can be well applied to small-size and large-capacity miniature capacitors and film capacitors, and has great application potential.

The invention discloses a four-phase hybrid nano composite film based on a wet process and a preparation method thereof, and relates to the technical field of film materials, and the discharge efficiency of all films is more than 80%; the dielectric constant reaches 46, and the dielectric loss is as low as 0.07; the preparation method comprises the following steps: preparing a raw material; the preparation method comprises the following steps: (1) stabilizing a PP solution at room temperature through a non-equilibrium process; (2) blending the PP solution and the P (VDF-HFP) solution; (3) preparing a BaTiO3 nano ceramic filler coated with SiO2 by adopting a Stber method; (4) doping nano ceramic particles with a core-shell structure into the polymer solution, stirring and performing ultrasonic treatment to obtain a membrane casting solution; and (5) preparing the membrane through a solution pouring method. The invention aims to provide a new thought for interface improvement of incompatible two phases represented by a linear polymer PP and a ferroelectric polymer P (VDF-HFP), solve the problems of high energy consumption, environmental pollution and the like caused by melting, hot pressing, stretching and the like when a dielectric film containing a PP component is prepared by a traditional process, reduce the cost of a film preparation process and provide new possibility for commercial development.

The invention discloses a touch sensor of an ultraviolet light degradable composite film and a preparation method of the touch sensor. A cPPA / ZnO nanorod composite film is adopted as a functional layer, and ITO-PET flexible electrodes are fixed to the upper side and the lower side of the nano composite film respectively; the cPPA / ZnO nanorod composite thin film is composed of ZnO nanorods and a light transient composite thin film, wherein the ZnO nanorods and the light transient composite thin film are distributed randomly. The tactile sensor taking the cPPA / ZnO nanorod composite film as the functional layer has basic pressure sensing performance, and can identify the kept static force to complete the realization of tactile perception. Tests show that the linear sensitivity of the device is 3.79 mV / kPa within the axial pressure range of 10-100 kPa, and the device can be degraded within 20 minutes under the radiation of ultraviolet light with the illumination of 1000 lux, so that information safety and environmental protection are realized. Zinc oxide (ZnO) can generate remarkable polarization charges under the action of stress, so that piezoelectric response is realized, and meanwhile, the ZnO can react with HCl generated by excitation of a photoacid generator, so that a device is completely degraded.

An exemplary embodiment of the present disclosure provides a system for detecting the presence of an analyte. The system can comprise a first electrode, a second electrode, and a nanocomposite material. The nanocomposite material can comprise a polymer material and a plurality of conductive nanoparticles dispersed in the polymer material. The nanocomposite material can be in electrical communication with the first and second electrodes.

The invention discloses a caffeic acid carbon dot / pullulan-chitosan nano composite film for fresh keeping of fresh poultry meat and a preparation method of the caffeic acid carbon dot / pullulan-chitosan nano composite film, and belongs to the technical field of food packaging materials. According to the invention, pullulan and chitosan are used as a composite matrix, and caffeic acid derived carbon dots are used as a nano functional filler to be compounded to form the film. According to the invention, natural caffeic acid is converted into nano carbon dots, and the nano carbon dots are uniformly dispersed in a polysaccharide matrix, so that the problems of easy migration and single function of active components in a traditional active package are solved. The obtained nano composite film not only has high mechanical strength and good moisture resistance, but also has excellent and lasting antioxidant and antibacterial activity. When being applied to packaging of fresh meat products, the preservative can effectively inhibit microbial growth and fat oxidation, significantly delay spoilage and prolong shelf life. The invention provides a new strategy for developing high-performance and environment-friendly active food packaging materials.

The utility model discloses a graphene nano composite film deposition device which comprises a cylindrical body, a multi-channel gas distributor, a rotatable base material tray, an aerosol spraying module and a magnetron sputtering assembly, the interior of the cylindrical body is a vacuum cavity, and the multi-channel gas distributor is fixedly installed at the top end of the cylindrical body through a flange plate; a vacuum pump is fixedly installed at the bottom end of the cylindrical body through a flange plate, a partition plate is fixedly installed in the middle of a vacuum cavity in the cylindrical body, a rotatable base material tray is arranged on the partition plate, and the aerosol spraying module is connected to a multi-channel gas distributor. The magnetron sputtering assembly is mounted on the inner side wall of the cylindrical body; the graphene nano composite film deposition device has the characteristics that uniform deposition of the film can be realized in combination with rotation of the base material, the modular design supports preparation of a single-layer or alternate multi-layer composite film, the flexible base material is adaptive, an efficient vacuum system is adopted, energy loss is reduced and the like.

The invention provides a high-energy-storage-density polypropylene-based nano composite film. The high-energy-storage-density polypropylene-based nano composite film is prepared from polypropylene-boron nitride composite particles and PCOE (at) PMMA (at) BaTiO3 double-shell structure nano particles through tape casting, irradiation and stretching. The composite film provided by the invention has high dielectric property and energy storage density. According to the invention, a quantifiable high-performance dielectric solution is provided for high-power application scenarios such as an electric vehicle inverter and pulse power equipment.

The present application relates to a kind of rosin-based coordination polymer film and its preparation method and application.By dissolving hydrolysis maleic rosin in natural turpentine to obtain oil phase solution, it is added to the water phase solution containing metal ions on top, coordination reaction occurs at oil-water interface to form rosin-based coordination polymer film, and combined with porous base film to form composite film.The present application realizes the nanoscale processing of rosin product by interfacial molecular self-assembly, and the obtained nanocomposite film has good performance in organic solvent nanofiltration, can realize the separation of organic molecules and solvent recovery, and has great prospect in the separation and purification of organic mixtures in chemical, pharmaceutical, food and other industries.The present interfacial synthesis method is efficient and convenient, solvent is green and sustainable, reaction condition is mild and easy to scale up.

This invention discloses a core-shell nanocomposite thin film material, its preparation method, and its application. The material is composed of polyvinylidene fluoride (PVDF) and BaTiO3. A first spinning solution is obtained by mixing PVDF, acetone, and N-N-dimethylformamide (DMF); a second spinning solution is obtained by mixing BaTiO3 and DMF. Using the first spinning solution as the outer core layer and the second spinning solution as the inner core layer, PVDF-encapsulated BaTiO3 composite nanofibers are obtained through coaxial electrospinning, successfully preparing a core-shell nanocomposite thin film. This invention achieves optimal piezoelectric performance by encapsulating BaTiO3 particles of different sizes. The preparation method is simple and low-cost, exhibiting excellent piezoelectric properties. Its application in piezoelectric energy harvesters can improve energy harvesting efficiency.

This invention provides a pressure scanning measurement system and method for a nanocomposite material spraying field. It primarily addresses the need for pre-calibration of the manufacturing system before the formal fabrication of nanocomposite films using additive manufacturing technology, thereby eliminating potential production problems. The invention involves arranging a series of tube arrays in the spraying field, connecting these arrays to sensors, using a measurement module to obtain the pressure values ​​at the locations of the tube arrays, and using a scanning module to change the positions of the tube arrays within the spraying field. Finally, based on the measured pressure data, imaging can be performed to obtain the two-dimensional or three-dimensional pressure distribution of the spraying field. The pressure distribution image obtained using the method proposed in this invention can be used to determine whether the spray gun is functioning properly, thus achieving pre-calibration of the spraying manufacturing system. This provides a solution for the stable fabrication of high-quality nanocomposite films.

Disclosed herein is a method for producing a chitosan-based nanocomposite film, the method comprising steps of synthesizing one or more nanoparticles from precursors of one or more metal oxides by utilizing plant-based extracts and agricultural waste, mixing precursors of one or more metal oxide at predetermined concentration and pH level to obtain a nanocomposite mixture, dissolving chitosan in an acetic acid solution, embedding the nanoparticles into a chitosan matrix, cross-linking the nanoparticles with the chitosan matrix and extending the nanocomposite mixture to form a multi-layered film.

This invention provides a highly transparent nanocomposite film for ultraviolet-blue light protection and its preparation method. The aforementioned highly transparent nanocomposite film achieves a transmittance of less than 5% in the 250–500 nm ultraviolet-blue light band by precisely controlling the core-shell structure and energy levels of ZnCdS@Cd-rich nanocrystals through differentiated ligand ratios, coupled with a low filler content design of 0 < x ≤ 5 wt%. This results in highly transparent nanocomposite films that effectively shield high-energy harmful light radiation while maintaining a transmittance of not less than 90% in the long-wavelength visible light band above 520 nm, balancing protective effect and visual clarity. This solves the shortcomings of traditional materials that either provide insufficient protection or suffer from visual distortion due to poor transmittance. Furthermore, the preparation method is simple and controllable, requires no complex equipment, and is compatible with various coating methods such as drop coating, spin coating, and blade coating, making it suitable for large-scale production.