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791results about How to "High visible light transmittance" patented technology

Alicyclic-containing polyimide film and preparation method thereof

The invention relates to an alicyclic-containing polyimide film. The molecular structure general formula of the film is the right formula, wherein, -CA- is a bivalence connection group of an alicyclic dibasic primary amine, -Ar- is a bivalence connection group of an aromatic dibasic primary amine, and -R- is a bivalence connection group of an aromatic dibasic estolide. The preparation thereof includes: the alicyclic dibasic primary amine and the aromatic dibasic primary amine are dissolved in non-proton organic solvent with strong polarity, the aromatic dibasic estolide is added, the non-proton organic solvent with strong polarity is used for regulating the viscosity of the alicyclic-containing polyamic acid resin solution after reaction for 1-3 hours, forming is carried out in a curtain coating machine, and dehydration fever imidization, cooling and demoulding are carried out so as to obtain the film. The preparation method has mild reaction condition and low cost and is environmentally friendly; and meanwhile, the alicyclic-containing polyimide film has excellent mechanic property and heat resistant property and low water absorption, and the visible light transmission thereof is as high as more than 97%. The film has good application prospect in the fields of optical waveguide material, photorefractive material and photoelectric material in optical communication field and direct action membrane material in the liquid crystal display field and the like.
Owner:DONGHUA UNIV

Full aromatic fluorine containing transparent polyimide film and preparation method thereof

The invention relates to a full aromatic fluorine containing transparent polyimide film. Structural formula of molecule thereof is shown above, wherein -R1 is a divalent residue of fluorine containing aromatic binary primary amine, and -R2 is a divalent connecting group of aromatic binary anhydride molecule. The preparation method thereof comprises steps of adding the fluorine containing aromatic binary primary amine and strongly polar non-protonic organic solvent into a polymerizing bottle, stirring at room temperature, after being completely dissolved, adding the aromatic binary anhydride, stirring, after 3 hours reaction, obtaining transparent and thick fluorine containing aromatic polyamide acid resin solution having homogeneous phase; and using the strongly polar non-protonic organic solvent to regulate viscosity of the fluorine containing aromatic polyamide acid resin solution, forming film, heating, carrying out dehydrating hot-imidization reaction, cooling, demoulding, thus obtaining the full aromatic fluorine containing transparent polyimide film. The preparation method has mild reaction condition, simple operation and low cost and is environment friendly. The full aromatic fluorine containing transparent polyimide film has excellent mechanical property and heat tolerance and visible light transmission thereof is up to 95%.
Owner:DONGHUA UNIV

Self-cleaning, antibacterial and anti-fog film

InactiveCN103396634AAntistaticWith anti-electromagnetic radiation performanceUltraviolet lightsHeat sensitive
The invention relates to a self-cleaning, antibacterial and anti-fog film. The self-cleaning, antibacterial and anti-fog film is prepared by acidizing TiO2 nano-particle powder, adding a surfactant, a stabilizer, an acid and the like, preparing, and concentrating to obtain TiO2 nano-particle slurry, adequately mixing the slurry with an organic high-molecular polymer and auxiliaries, and drying to obtain master batches; and commonly plasticizing, extruding and calendaring the master batches to prepare the self-cleaning, antibacterial and anti-fog film, wherein the constituents of the film comprise 72.89-92.34 wt% of the organic high-molecular polymer, 0.5-22.63 wt% of TiO2 nano particles and 3.36-23.45 wt% of auxiliaries. The film has a high visible light transmittance, self-cleaning, antibacterial and anti-fog functions, reflection and control effects on ultraviolet light rays and far-infrared light rays, antistatic property and anti-electromagnetic radiation property; the film is prepared with no need of high vacuum and high-temperature heating, simple and practicable equipment, and low cost; the film can be compounded with pressure-sensitive adhesive and heat-sensitive adhesive, used as the films of building glass, and the windows of vehicles and ships for improving the self-cleaning, antibacterial and anti-fog functions of the building glass and the windows, and used for performing transformation and large-area field construction on the installed glass and windows.
Owner:武汉羿阳科技有限公司

Organic/inorganic hybrid transparent heat-insulating coating material, and preparation method and application thereof

The invention discloses an organic/inorganic hybrid transparent heat-insulating coating material. The coating material comprises the following raw materials by mass: 45 to 85 parts of a UV light-cured resin, 5 to 50 parts of a nanometer heat-insulating particle dispersion liquid and 1 to 4 parts of an auxiliary agent. The invention also discloses a preparation method for the coating material. The preparation method comprises the following steps: (1) preparation of the nanometer heat-insulating particle dispersion liquid; (2) preparation of a nanometer modified sol; (3) preparation of the organic/inorganic hybrid UV-cured resin; and (4) preparation of the hybrid transparent heat-insulating coating material: a step of preparing the raw materials according to above-mentioned mass proportions, adding the raw materials into a reaction vessel and carrying out high speed dispersion so as to obtain the coating material. The invention further discloses application of the coating material. The coating material is applicable to heat insulation and protection in the aspects of energy-saving electric light sources, photoelectric materials, energy-saving windows, solar cells, etc. According to the invention, through addition of a functional heat-insulating particle into an organic/inorganic hybrid resin system, an obtained transparent heat-insulating coating has high visible light transmittance and a substantial effect on obstruction of infrared and near infrared heat radiation.
Owner:上海大学浙江嘉兴新兴产业研究院

Preparation method of core-shell structural high-transparency low-radiation heat-insulating composite nanometer coating

The invention belongs to the technical field of a functional nanometer material, and particularly relates to a preparation method of a core-shell structural high-transparency low-radiation heat-insulating composite nanometer coating. The method comprises the following steps: (1) adding and mixing a surface active agent and inorganic semiconductor particles in a solvent, and preparing core layer inorganic semiconductor nanometer particles by means of high-speed ball milling; (2) dispersing a modified core layer, a shell layer precursor and an ammonia water solution in an alcohol solvent, and performing high-speed ball milling to obtain a core-shell structural nanometer material powder body; (3) roasting to obtain a core-shell structural composite nanometer material; (4) dispersing the core-shell structural composite nanometer material in an organic solvent, and mechanically stirring to obtain a dispersion liquid of the composite nanometer material; (5) mixing the dispersion liquid with organic resin, a flatting agent and a defoaming agent, and mechanically stirring to obtain the high-transparency low-radiation heat-insulating composite nanometer coating. The high-transparency low-radiation heat-insulating composite nanometer coating can be used for coating glass and plastic surfaces by means of spray coating, brush coating, roller coating and the like, and has the effects of high transparency, low radiation and heat insulation.
Owner:BEIHANG UNIV

Method for directly preparing metal oxide/silver nanowire composite conductive network

The invention relates to a method for directly preparing a metal oxide/silver nanowire composite conductive network, belongs to the technical field of transparent conductive thin films and anti-static coating layers, and aims to solve the technical problem that the technology for preparing a silver nanowire/inorganic metal oxide composite conductive thin film by two steps in the prior art is complicated. The method comprises the following steps: preparing a soluble metal oxide precursor solution; mixing the prepared metal oxide precursor solution with dispersion liquid of a silver nanowire to obtain soluble metal oxide/silver nanowire mixing dispersion liquid, and forming a film on the upper surface of a substrate by a wet processing technology; finally performing high-temperature annealing, ultraviolet ozone irradiation or oxygen plasma treatment to obtain the metal oxide/silver nanowire composite conductive network. According to the method, the metal oxide/silver nanowire composite conductive network is prepared in one step, so that the preparation technology is greatly simplified, and the production cost is reduced; the prepared composite conductive network is high in mechanical strength, higher in visible light transmittance and lower in square resistivity.
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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