二甲基亚砜防冻机理的拉曼光谱分析

采用拉曼光谱对不同体积比的二甲基亚砜(DMSO)水溶液进行测量, 并利用Origin 7.5对水的光谱带进行分峰, 求得拉曼光谱峰面积比值. 应用混合模型对实验结果进行了分析, 分析结果表明, 防冻剂二甲基亚砜与水混合时, 其SO基团与水分子的OH基团形成氢键(SO…H—O), 有效地阻止了四面体结构冰的生成, 并证实了二甲基亚砜与水的体积比为1∶1时, 防冻效果最佳.

Raman Spectral Analysis of the Anti-freezing Mechanism of Dimethyl Sulfoxide

A series of mixures of dimethyl sulfoxide(DMSO) and water with various volume ratios were measured by Raman spectrum. we also used computer software to seek Raman peak area ratio via peak separation method of spectral band of water. Based on the experimental results and analysis with mixture model, it was known that after mixing antifreezer dimethyl sulfoxide and water, its SO groups and O—H groups of water molecule can form the hydrogen bond to prevent the formation of tetrahedral structure ice. Simultaneously, it was also proved that the effect of antifreezer dimethyl sulfoxide is the best, as volume ratio of dimethyl sulfoxide to water is 1∶1.