甲基氰乙基纤维素/二氯乙酸液晶溶液的红外研究

FTIR Study on the Methyl-Cyanoethyl Cellulose/Dichloroacetic Acid Solution

本文用FTIR研究了甲基氰乙基纤维素/二氯乙酸溶液相转变过程中分子间相互作用的变化。发现溶液中分子之间的相互作用随溶液结构的改变而变化。随着浓度的增大,溶液由各向同性态向各向异性态转变,分子产生有序排列,导致某些氢键被增强或削弱,使基团的红外吸收谱带发生位移。当加热液晶溶液时,各向异性态向各向同性态转变,也使基团的红外吸收谱带位移。

The molecular interactions in the methyl-cyanoethyl cellulose/dichloroacetic acid solution are studied by Fourier transform infrared spectroscopy (FTIR). It is found that the molecular interactions are related to the structures of the solution. The formation and the desturction of the hydrogen bonds during the transition between isotropic and anisotropic phase greatly affect the displacement of the bands. The IR bands change with the anisotropic-isotropic phase transition during heating.