基于电场诱导填料取向排列的复合材料制备技术

电场取向法作为提升复合材料性能的有效方法,已成为在低填充条件下制备具有优良性能复合材料的关键技术,受到国内外众多学者广泛关注。对电场诱导填料取向进行了理论分析,并对不同电场类型诱导不同填料取向制备复合材料的相关研究进行了整理与分析。针对直流电场和交流电场在取向过程中的热击穿现象,重点论述了脉冲电场诱导填料取向制备取向型复合材料的研究现状和优势。最后,分析了利用电场取向法制备复合材料的难点,并对电场取向法制备复合材料的未来发展方向进行了展望。

Phase transitions in two organic salts based on 1,5-naphthalenedisulfonate

Two phase transition compounds,diethylammonium 1,5-naphthalenedisulfonate(1)and cyclohexylammonium 1,5-naphthalenedisulfonate(2),were screened from a series of organic salts based on 1,5-naphthalenedisulfonate.The phase transition behaviors were studied by differential scanning calorimetry,single-crystal X-ray analysis and dielectric measurements.Compounds 1 and 2 undergo phase transitions at about 202 and 148 K,respectively,accompanied by distinct dielectric changes.The origin of the phase transitions was ascribed to motional changes of the cations in the crystal lattices.