摘要
合成了一种新型凝胶因子 ,能在很低的浓度下使水发生凝胶化 ,形成水分子凝胶 .通过原子力显微镜 (AFM)以及透射电子显微镜 (TEM)对水分子凝胶的微观形态进行了表征 ,表明凝胶因子可以在水中聚集、自组装成延伸的螺旋缠绕细纤维结构 ,并且得出了纤维束的平均直径在 10 0nm左右 ,平均孔径在 10 0nm左右 .利用示差扫描量热 (DSC)的数据 ,计算了水分子凝胶体系的平均孔径大小在 5 0～ 10 0nm左右 ,与AFM和TEM观测的结果较吻合 ,从而验证了DSC理论推导计算的正确性 .同时还得到了不同浓度的水分子凝胶的凝胶 -溶胶相转变温度TGS在 5 5～ 72℃之间 ,而且随着凝胶因子浓度的增加 ,水分子凝胶体系的平均孔径呈减小的趋势 ,凝胶
A water molecular gel can be formed by the aggregation and self-assembly of gelator 4, 4'-bisstearylamide diphenyl ether at very low concentration. The microcosmic morphology, thin fiber-like structure, was observed from atomic force microscope (AFM) and TEM of the gels. The average fiber bundle diameter and the average hole diameter of the gel are both about 100 mm. By DSC measurements, the average hole diameter of the gel in different concentrations is calculated to be 50 similar to 100 nm. The gel-sol temperature T-GS of 55 similar to 72 degreesC is obtained. It is shown that the average hole diameter of the gel decreases and the gel-sol temperature T-GS increases with the increase of the concentration of gelator.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2003年第2期213-217,共5页
Acta Chimica Sinica
基金
国家自然科学基金 (No.2 99740 1 2 )资助项目
