Controllable transformation from sensitive and reversible heat-set organogel to stable gel induced by sodium acetate

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• 作者：Feifei Xin ; Huacheng Zhang ; Baoxiang Hao ; Tao Sun ; Li Kong ; Yueming Li ; Yuehui Hou ; Shangyang Li ; Yu Zhang ; Aiyou Hao
• 关键词：Acetates ; ¦Â-Cyclodextrin ; Transformation ; Reversible organogel ; Stable gel
• 刊名：Colloids and Surfaces A: Physicochemical and Engineering Aspects
• 出版年：2012
• 出版时间：20 September, 2012
• 年：2012
• 卷：410
• 期：Complete
• 页码：18-22
• 全文大小：819 K

文摘

This paper describes the first example of controllable transformation from sensitive and reversible heat-set organogel to stable gel induced by sodium acetate. Upon the addition of proper amount of acetate sodium into the reversible heat-set organogel system composed of ¦Â-CD, phenolphthalein (PP) and lithium chloride in N,N-dimethylformamide, the reversible gel could transform to stable gel as the temperature decreased. Further studies showed that other analogous acetates with K⁺ and Mg²⁺ do not possess this property. The gel was characterized by SEM, XRD and FT-IR. This work may pave the way for the design of smart materials with multi-responsiveness.