研究以高岭石为基料的新型有机-无机杂化铁电材料具有重要的理论和现实意义

研究以高岭石为基料的新型有机-无机杂化铁电材料具有重要的理论和现实意义。以杂环化合物2-吡嗪羧酸为客体，在高压釜中制备了高岭石/2-吡嗪羧酸插层化合物。用XRD、IR和TG对产物进行了表征，并对其铁电性能进行了测试，通过CASTEP程序的优化得到了可能的插层结构。结果表明，2-吡嗪羧酸分子在160℃自加压体系中可插层到高岭石层中10h，层间距扩展到1.39nm，插层率达到42.73%。客体分子以几乎垂直的方式定向于高岭石层之间，导致插层化合物在外加电场作用下表现出室温铁电性。此外，该插层化合物具有一定的热稳定性（

研究以高岭石为基料的新型有机-无机杂化铁电材料具有重要的理论和现实意义。 以杂环化合物2-吡嗪羧酸为客体，在高压釜中制备了高岭石/2-吡嗪羧酸插层化合物。 用XRD、IR和TG对产物进行了表征，并对其铁电性能进行了测试，通过CASTEP程序的优化得到了可能的插层结构。 结果表明，2-吡嗪羧酸分子在160℃自加压体系中可插层到高岭石层中10h，层间距扩展到1.39nm，插层率达到42.73%。 客体分子以几乎垂直的方式定向于高岭石层之间，导致插层化合物在外加电场作用下表现出室温铁电性。 此外，该插层化合物具有一定的热稳定性（

It is of great theoretical and practical significance to study new organic-inorganic hybrid ferroelectric materials based on kaolinite. Kaolinite / 2-pyrazine carboxylic acid intercalation compound was prepared in autoclave with 2-pyrazine carboxylic acid as the guest. The product was characterized by XRD, IR and TG, and its ferroelectric properties were tested. The possible intercalation structure was obtained by the optimization of CASTEP program. The results showed that 2-pyrazine carboxylic acid molecules could be intercalated into kaolinite layer for 10 hours in a self pressurized system at 160 ℃, and the intercalation rate reached 42.73%. The guest molecules are oriented almost vertically between the kaolinite layers, resulting in the intercalation compounds showing room temperature ferroelectricity under the action of external electric field. In addition, the intercalation compound has certain thermal stability（<br>