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

我们发现，添加PVA和纤维素的钨酸以及添加了聚乙二醇酯的钨酸具有光致变色增强作用，其中一种现象是我们以前的研究揭示的。此外，我们还发现添加聚合物的薄膜具有柔性，这是其他有序方法无法实现的。到目前为止，乍一看，OH碱在光致变色增强中起着重要的作用。1.光致变色增强的程度与所添加的PEG的聚合度无关；2.我们发现材料中不存在光致变色增强的材料，并通过考虑元素的电负性解释了新的机理。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的相互作用对脱水过程的影响很大。此外，我们还通过许多实验结果揭示了脱水凝胶已经接近有序玻璃。通过发展这种方法，我们将能够在不经过热处理的情况下制作聚合物玻璃，并实现被热分解的新型智能材料。我们揭示了原子力显微镜(AFM)对于表征(晶体材料中的)表面域结构是有用的，这有望成为光致变色电池的有机衬底。特别是，我们首次观察到了使TGS的铁电磁畴得以区分的透镜图形。

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.