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Study on New Chargeable Photoelectric Conversion Effect in Composite System of Tungstic Acid and Organic Polymer

钨酸与有机聚合物复合体系新型带电光电转换效应研究

基本信息

批准号：
07650820
负责人：
HARA Kazuhiro
金额：
$ 1.41万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650820/
关键词：
Enhancement of Photochromism Water Soluble Polymer PEG PVA Cellulose Dehydration of Gel Domain Structure Atomic Force Microscope (AFM)インピーダンスタングステン酸着色反応 Randlesの等価回路高分子水素イオン

项目摘要

We have found that PVA- and cellulose-added tungstic acid show the photochromic enhancement, as well as PEG-added one of which the phenomenon was revealed by our previous studies. Besides, we have found that the polymer-added film has been flexible, which cannot be realized by other ordinal metods.So far, it seemed that OH base playd an improtant role in the photochromic enhancement at first sight. However, we have found that the leading part is the base which includes OH base and that it can exist more generally in the materials than the OH base from the facts that :1.Degree of the photochromic enhancement has been independent of the degree of polymerization of the added PEG.2.We have found the materials which do not show the photochromic enhancement with the OH base.Besides, we have been able to explain the new mechanism by taking account of the eletronegativity of elements.We have studied dehydration process of gels, which are improtant as a matrix of the photochromic composite, and have found that the feature of the dehydration process has been much affected by the interaction between solven and polymer network in the gels. Besides, we have revealed that the dehydared gels have come neares to the ordinal glass by many experimental results. By developing this method, we shall be able to make the polymeric glass without heat treatment and to realize the new smart materials which had been decomposed by the heat.We have revealed that the atomic force microscope (AFM) is useful for characterizing the surface domains structure (in crystaliine materials) which is expected as an organized substrate of the photochromoc cell. Especially, we have been able to the observed the lenticlar pattern which gives the ferroelectric domain of TGS a distiction for the first time.

我们发现添加PVA和纤维素的钨酸表现出光致变色增强，而添加PEG的钨酸也表现出光致变色增强的现象，其中之一是我们以前的研究所揭示的现象。此外，我们还发现添加聚合物的薄膜具有其他常规方法无法实现的柔性，初步认为OH碱在光致变色增强中起着重要作用。然而，我们已经发现，主要部分是包括OH碱的碱，并且它可以比OH碱更普遍地存在于材料中，这是由于以下事实：1.光致变色增强的程度与PEG的聚合度无关2.我们发现了OH碱对光致变色没有增强作用的材料，并从元素的电负性角度解释了光致变色增强的新机理.我们研究了作为光致变色复合材料基质的凝胶的脱水过程，并发现凝胶中溶剂与聚合物网络之间的相互作用对脱水过程的特征有很大的影响。此外，大量的实验结果表明，脱水后的凝胶已接近普通玻璃。通过发展这种方法，我们将能够使聚合物玻璃没有热处理，并实现新的智能材料已被分解的热量。我们已经发现，原子力显微镜（AFM）是有用的表征表面域结构（在晶体材料），这是预期作为一个有组织的基板的光致变色电池。特别是，我们首次观察到了TGS铁电畴的“锯齿”图案。