高岭石/2-吡嗪羧酸插层化合物的制备及其铁电性质  

Preparation and Ferroelectricity of Kaolinite/2-pyrazinecarboxylic Acid Intercalation Compound

作　　者：赵顺平 郭玉 徐衡 汪婕 冯小亮 朱苗苗 ZHAO Shunping;GUO Yu;XU Heng;WANG Jie;FENG Xiaoliang;ZHU Miaomiao(School of Chemistry and Chemical Engineering,Anqing Normal University,AnHui Province Key Laboratory of Optoelectronic and Magnetism Functional Materials,Key Laboratory of Functional Coordination Compounds of Anhui Higher Education Institutes,Anqing 246011,China)

机构地区：[1]安庆师范大学化学化工学院,光电磁功能材料安徽省重点实验室,光电磁功能配合物和纳米配合物安徽省重点实验室,安徽安庆246011

出　　处：《材料科学与工程学报》2021年第4期605-608,646,共5页Journal of Materials Science and Engineering

基　　金：安徽省教育厅自然科学基金重点资助项目(KJ2020A0496);光电磁功能配合物和纳米配合物安徽省重点实验室开放基金资助项目(ZD2017003)。

摘　　要：本研究试图以高岭石为主体材料,制备一类新的有机-无机杂化铁电材料。具体做法是以杂环化合物2-吡嗪羧酸为客体,在高压釜中制备高岭石/2-吡嗪羧酸插层化合物,该产物经X射线衍射(XRD)、红外光谱(IR)、热分析曲线(TG)表征和铁电性质测试,并通过CASTEP程序计算优化获得可能的插层结构。研究结果表明:依靠体系自增压,2-吡嗪羧酸分子在160℃、10 h条件下可插入高岭石层间,撑大其层间距至1.39 nm,插层率为42.73%;客体分子以几乎垂直方式定向于高岭石层间;该化合物具有室温铁电性和一定的热稳定性(<100℃)。The study of a new organic-inorganic hybrid ferroelectric material based on kaolinite has important theoretical and practical significance.Kaolinite/2-pyrazinecarboxylic acid intercalation compound was prepared in an autoclave with the heterocyclic compound 2-pyrazinecarboxylic acid as the guest.The product was characterized by XRD,IR and TG and its ferroelectric property was tested,and the possible intercalation structure was optimized by CASTEP program calculation.The results show that,depending on the self-pressurization of the system,2-pyrazinecarboxylic acid molecules can be inserted between kaolinite layers at 160℃for 10 h,and the interlayer spacing is enlarged to 1.39 nm,with an intercalation rate of 42.73%.Guest molecules are oriented between kaolinite layers in an almost vertical manner.The intercalation compound exhibits room temperature ferroelectricity and certain thermal stability(<100℃).

关 键 词：高岭石 2-吡嗪羧酸 插层 高压釜 铁电 

分 类 号：TB332[一般工业技术—材料科学与工程]