POLYMER/LIQUID CRYSTAL COMPOUND MEMBRANE AND ITS PRODUCTION

• Main Authors: HAMA KAZUO, EBATA MOTOHARU
• Format: Patent
• Language: English
• Published: 28.05.1991
• Subjects: ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DYES; FREQUENCY-CHANGING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PHYSICS; POLISHES; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; THEIR PREPARATION OR CHEMICAL WORKING-UP

PURPOSE:To facilitate the formation of a polymer/liquid crystal composite membrane being capable of low-voltage drive at low frequencies and having rapid response by removing electrolyte ions from a polymer membrane formed by electrolytic polymerization and impregnating the holes freed from the ions with a liquid crystal. CONSTITUTION:A solution 12 comprising a monomer material, an electrolyte and a solvent is put in a container 11 and a transparent conductive film 13 is put in the solution 12 while a counter electrode 16 is provided in opposition to the transparent conductive film 13. A constant-current D.C. electric source 17 is provided between the film 13 and the counter electrode 16 in such a position that the positive electrode of the source 17 is on the side of the film 13. A polymer film 19 is formed on the surface of the film 13 by electrolytic polymerization. After the solution 12 is replaced by an electrolyte solution 21 free of the monomer material, the positive electrode of the source 17 is connected with the counter electrode 16 and a current is applied to remove electrolyte ions from the polymer membrane 19. The holes freed from the ions are impregnated with a liquid crystal to obtain a polymer and liquid crystal composite membrane.