Structure and Properties of Cellulose Derivatives with Piezoelectricity, Pyroelectricity and Ferroelectricity

压电、热电、铁电纤维素衍生物的结构与性能

• 批准号: 04660181
• 负责人: HIRAI Nobuyuki
• 金额: $ 1.34万
• 依托单位: Shizuoka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04660181/
• 关键词: cellulose derivatives; cyanoethylated cellulose; piezoelectricity; pyroelectricity; ferroelectricity; セルロース誘導体の電気物性; シアノエチル化ヒドロキシエチルセルロース; 圧電緩和; シエノエチルセルロース

The purpose of the present investigation is to develop the high piezoelectric materials of cellulose derivatives. And also the possibility of ferroelectricity of cellulose derivatives has been studied. It is recognized that cyanoethylated cellulose has the highest piezoelectric modulus in the cellulose derivatives.The results obtained are summarized as follows.1. Cellulose derivatives with high piezoelectric modulusThe piezoelectric modulu of cellulose nitrate, cellulose acetate, cyanoethylated cellulose and cyanoethylated hydoroxyethylcellulose have been measured. The value of cyanoethylated hydroxyethylcellulose is about 1-2x10^<-11> C/N at 20ﾟC.The value of it is the highest in the cellulose derivatives and is approaching the value of Polyvinyl fluoride. It may be possible to use it as industrial materials with electric functions by increasing the piezoelectric porlarization.2. Possibility of ferroelectric cellulose derivativesD(electric displasement)-E(electric field) hysteresis loop is measured about the cyanoethylated hidroxyethylcellulose whith high piezoelectric modulus. But we could not experimentally prove the existence of ferroelectricity in cyanoethylated hydroxyethylcellulose. Because of increasement of direct current, high electric field could not be applied to the specimens. It is necessary to remove ionic and other low molecular weight impurities. Measurements of ferroelectricity of cellulose derivatives which are oriented by high drawing, or of which polar side chains are oriented by high electric field or high magnetic field are now under consideration.

本研究的目的是开发纤维素衍生物的高压压电材料。还研究了纤维素衍生物铁电性的可能性。氰乙基化纤维素被认为是纤维素衍生物中压电模量最高的。所得结果总结如下： 1．具有高压电模量的纤维素衍生物测量了硝酸纤维素、醋酸纤维素、氰乙基纤维素和氰乙基羟乙基纤维素的压电模量。氰乙基化羟乙基纤维素在20℃时的值约为1-2x10^<-11>C/N，其值在纤维素衍生物中最高，接近聚氟乙烯的值。通过提高压电极化率，有可能将其用作具有电功能的工业材料。 2．针对具有高压电模量的氰乙基化羟乙基纤维素，测量了铁电纤维素衍生物D（电位移）-E（电场）磁滞回线的可能性。但我们无法通过实验证明氰乙基化羟乙基纤维素中铁电性的存在。由于直流电流的增加，无法对样品施加高电场。有必要去除离子和其他低分子量杂质。现在正在考虑测量通过高拉伸取向的纤维素衍生物的铁电性，或者通过高电场或高磁场取向的极性侧链的纤维素衍生物的铁电性的测量。

项目成果

Nobuyuki Hirai, Shunji Hayamura, Youki Suzuki, Katsuhiro Miyajima and Satoru Matsuyama: "Piezoelectric Relaxation of Wood in High Temperature Region" Mokuzai Gakkaishi. 38(9). 820-824 (1992)

Nobuyuki Hirai、Shunji Hayamura、Youki Suzuki、Katsuhiro Miyajima 和 Satoru Matsuyama：“高温区域木材的压电弛豫”Mokuzai Gakkaishi。

Hirai,N.: "Piezoelectric Relaxation of Wood in High Temperature Region." Mokuzaigakkaishi. 38. 820-824 (1992)

Hirai,N.：“高温区域木材的压电弛豫”。

平井信之・森田光博・鈴木養樹: "シアノエチル化木粉およびシアノエチルセルロースの電気的性質"

Nobuyuki Hirai、Mitsuhiro Morita、Yoki Suzuki：“氰乙基化木粉和氰乙基纤维素的电特性”

Nobuyuki Hirai, Mitsuhiro Morita and Youki Suzuki: "Electrical Properties of Cyanoethylated Wood Meal and Cyanoethylated Cellulose" Mokuzai Gakkaishi. 39(5). 603-609 (1993)

Nobuyuki Hirai、Mitsuhiro Morita 和 Youki Suzuki：“氰乙基化木粉和氰乙基化纤维素的电气特性”Mokuzai Gakkaishi。

Hirai,N.: "Piezoelectric Relaxation of Wood in High Temperature Region" Mokuzai Gakkaishi. 38. 820-824 (1992)

Hirai,N.：“高温区域木材的压电弛豫”Mokuzai Gakkaishi。