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Method for manufacturing polymeric membrane with photonic crystal structure

A manufacturing method and polymer film technology, applied in the field of polymer film manufacturing, can solve the problems of increased manufacturing cost and difficulty in practical application, and achieve the goals of increasing polymerization rate, reducing manufacturing cost, strong photonic crystal structure and Bragg reflection characteristics Effect

Inactive Publication Date: 2012-07-04
NAT CHENG KUNG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high cost of cholesteric liquid crystals, the manufacturing cost is greatly increased; therefore, it is still difficult to be widely used in practical applications.

Method used

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  • Method for manufacturing polymeric membrane with photonic crystal structure
  • Method for manufacturing polymeric membrane with photonic crystal structure
  • Method for manufacturing polymeric membrane with photonic crystal structure

Examples

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Embodiment Construction

[0046] A method for manufacturing a polymer film with a photonic crystal structure according to a preferred embodiment of the present invention will be described below with reference to related drawings, wherein the same components will be described with the same component symbols.

[0047] Please refer to Figure 4 As shown, it is a flowchart of a method for manufacturing a polymer film with a photonic crystal structure according to a preferred embodiment of the present invention. The manufacturing method of this embodiment includes step S01 to step S04.

[0048] Step S01: a mixing step, mixing at least one achiral liquid crystal, one optically active additive (chiral dopant), one monomer (monomer) and one photo initiator (photo initiator) to form a Liquid-crystal-monomer mixture, the liquid-crystal-monomer mixture is filled in a light-transmitting container, and the light-transmitting container may, for example, have a light-transmitting portion to allow light to pass throu...

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Abstract

The invention discloses a method for manufacturing a polymeric membrane with a photonic crystal structure. The method comprises a mixing step, at least one irradiation step, at least one dispersion step and a liquid crystal removal step, wherein in the mixing step, a nonchiral liquid crystal, an optical active additive, a monomer and a photo initiator are at least mixed to form a liquid crystal monomer mixture; in at least one irradiation step, the liquid crystal monomer mixture is irradiated through a photomask; in at least one dispersion step, monomers at the periphery of one of irradiated areas of the liquid crystal monomer mixture are dispersed to the irradiated area; and in the liquid crystal removal step, the nonchiral liquid crystal is removed so as to form the polymeric membrane. Through the dispersion step after the irradiation step, the polymerization rate of the monomer can be improved, so a ratio of polymer in the polymeric membrane is improved and a chirality transfer rate is improved; and therefore, the polymeric membrane can display the photonic crystal structure and Bragg reflection characteristics under the condition of not requiring any fluid.

Description

technical field [0001] The invention relates to a method for manufacturing a polymer film, in particular to a method for manufacturing a polymer film with a photonic crystal structure. Background technique [0002] With the development of Flat Panel Display (FPD) technology, and because of its superior features such as light and thin body, low power consumption and no radiation, it has gradually replaced the traditional Cathode Ray Tube (CRT) Display device, and applied to various electronic products. Among them, cholesteric liquid crystal (Cholesteric Liquid Crystal) is also used in display technology, especially in bistable displays, such as electronic paper. [0003] figure 1 It is a schematic diagram of molecular arrangement of cholesteric liquid crystal 11, which can be chiral cholesteric liquid crystal, or non-chiral liquid crystal added with chiral compound. Cholesteric liquid crystals basically have an asymmetric carbon atom (chiral center). The liquid crystals c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08F2/48
Inventor 刘瑞祥
Owner NAT CHENG KUNG UNIV
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