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中文摘要: 测定了四甲基溴化铵以及表面活性剂十二烷基三甲基溴化铵 （DTAB）、十四烷基三甲基溴化铵 （TTAB） 和十六烷基三甲基溴化铵（CTAB）对甲基纤维素（MC）-邻甲氧基肉桂酸钠盐（OMC-）体系的凝胶化行为的影响。结果表明：含DTAB、TTAB以及CTAB的MC-OMC-溶液的溶胶-凝胶转变温度不随表面活性剂质量分数的变化而变化，但是向MC-OMC-溶液中加入四甲基溴化铵，体系的溶胶-凝胶转变温度会显著下降。在含四甲基溴化铵或不同链长表面活性剂的MC-OMC-溶液中，TTAB等表面活性剂分子更倾向于在水溶液中形成球状胶束；四甲基溴化铵与OMC-有着较强的静电作用，会导致MC和OMC-形成的核-壳结构破裂。
Abstract:The sol-gel transitions of methylcellulose(MC)-ortho-methoxycinnamic acid sodium(OMC-) solution in the presence of tetramethyl ammonium bromide，dodecyl ammonium bromide (DTAB), tetradecyl trimethyl ammonium bromide (TTAB) and cetyl trimethyl ammonium bromide (CTAB) were studied. Results showed that the sol-gel transition temperature of MC-OMC-solution unchanged with the mass fraction of DTAB, TTAB and CTAB. However, when tetramethyl ammonium bromide was added to MC-OMC- solution, the sol-gel transition temperature of the solution decreased significantly. In MC-OMC- solution containing tetramethyl ammonium bromide or different chain length surfactants, surfactants such as TTAB tended to form free hemispherical micelles. Strong electrostatic interaction between OMC- and tetramethyl ammonium bromide would destroy the core-shell structure formed by MC and OMC-.
keywords: sol-gel transition methylcellulose ortho-methoxycinnamic acid surfactants tetramethyl ammonium bromide
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| 作者 | 单位 | |
| 陶俊 | 1． 西安近代化学研究所， 西安 710065； 2． 中国科学技术大学， 合肥 230026 | taojun4712230@126.com |
| 杨海洋 | 中国科学技术大学， 合肥 230026 |
引用本文：
陶俊,杨海洋.四甲基溴化铵及不同链长表面活性剂对甲基纤维素-邻甲氧基肉桂酸溶液凝胶化行为的影响[J].功能高分子学报,2013,26(2):.
TAO Jun,YANG Hai-yang.Effect of Tetramethyl Ammonium Bromide or Surfactants with Different Chain Length on Sol-Gel Transition of Methylcellulose-Ortho-Methoxycinnamic Acid Solution[J].Journal of Functional Polymers,2013,26(2):.
陶俊,杨海洋.四甲基溴化铵及不同链长表面活性剂对甲基纤维素-邻甲氧基肉桂酸溶液凝胶化行为的影响[J].功能高分子学报,2013,26(2):.
TAO Jun,YANG Hai-yang.Effect of Tetramethyl Ammonium Bromide or Surfactants with Different Chain Length on Sol-Gel Transition of Methylcellulose-Ortho-Methoxycinnamic Acid Solution[J].Journal of Functional Polymers,2013,26(2):.
