Lyotropic color response transparent film material and preparation method thereof
A transparent film and color technology, applied in the direction of coating, etc., can solve the problems of difficult large-area preparation of film materials, poor material flexibility, difficult to form, etc., and achieve the effect of fast lyotropic color response, excellent mechanical properties, and easy operation
Inactive Publication Date: 2009-11-04
FUDAN UNIV
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Problems solved by technology
However, most photonic crystal materials with external response functions are composed of hard inorganic microspheres (such as silicon dioxide, titanium dioxide) or hard polymer microspheres (such as polystyrene, polymethyl methacrylate, etc.), and the material is flexible. Poor, difficult to form soft membrane materials and difficult to prepare large areas
Method used
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Embodiment 1
[0045] Mix ethylenic monomers such as methyl methacrylate: 2-hydroxyethyl acrylate: vinyl acetate: methylvinyldimethoxysilane in a ratio of 30:20:20:30, and prepare monodisperse by emulsion polymerization polymer latex.
Embodiment 2
[0047] Mix ethylenic monomers such as butyl acrylate: methacrylic acid: styrene: methacrylamide in a ratio of 60:10:20:10, and prepare monodisperse polymer latex by dispersion polymerization.
Embodiment 3
[0049] Mix ethylenic monomers such as methyl styrene:perfluoropropyl vinyl ether, acrylic acid, and butyl acrylate in a ratio of 40:10:40:10, and prepare polymer latex by suspension polymerization.
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The invention belongs to the technical field of chemical materials, and in particular relates to a lyotropic color response transparent film material and a preparation method thereof. Methods of emulsion polymerization, dispersion polymerization, suspension polymerization, mini-emulsion polymerization and the like are adopted to prepare polymer latex which has hydrophilic groups, average particle size of between 100 and 500 nanometers, narrow particle size distribution, and glass-transition temperature of between 0 and 100 DEG C, the polymer latex is coated on a substrate material and is dried; and when the moisture is volatized, the polymer latex can be automatically assembled into a three-dimensional order colorless transparent film arranged periodically. The transparent film material has the advantages of quick lyotropic color responsibility and wide-range reversible regulation; and when the film contacts with a solvent, the colorless transparent film material can be changed into a colorized film material with beautiful colors which disappear along with the volatilization of the solvent. The material has excellent mechanical properties and lyotropic color response reversibility, simple, environment-friendly and nontoxic production process, and can be prepared in large areas directly. The lyotropic color response transparent film material can be widely applied to film or coating materials for color response, an optical and detection sensor, simulation, decoration, printing, anti-counterfeiting and the like.
Description
technical field [0001] The invention belongs to the technical fields of chemical industry and materials, and in particular relates to a lyotropic color responsive transparent film material and a preparation method thereof. More specifically, the lyotropic color-responsive transparent film material of the present invention can produce a lyotropic color-response phenomenon when the film material is in contact with a solvent, transforming from a colorless transparent film material to a colorful film material. Background technique [0002] Photonic crystals are composed of periodic dielectric structures or their reverse structures ordered in two-dimensional or three-dimensional directions. An interesting application of photonic crystals is its structural color. The structural color has high brightness, high saturation, rainbow color and never fades. It is possible to design photonic crystals to produce different colors for color response materials, photonic inks, Optical sensor...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C08F220/14C08F230/08C08F220/18C08F212/08C08F220/06C08F220/54C08J5/18C09D133/12C09D143/04C09D133/06C09D125/14C09D133/24C08J7/04C03C17/28C04B41/48C04B41/83
Inventor 武利民段玲丽游波周树学
Owner FUDAN UNIV