类似虫的状溶液的粘弹性行为是由以阿斯巴甜为基础的双头离子表面活性剂形成的
Bin Qiu1, Zhao Chen1, Xiaomei Pei1
1The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China. ccfsbl@jiangnan.edu.cn.
Soft matter
|February 4, 2025
概括
一种基于亚斯巴甜的新型表面活性剂,二乙醇-L-亚斯巴甜-氨 (C18-AP-2Na),与CTAB形成高度粘性,耐盐的溶液. 这一突破使各种应用的先进软材料成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
- 体科学 体科学 体科学
背景情况:
- 设计具有长尾的表面活性剂是新型软材料的关键.
- 疏水性表面活性剂的溶解性差,阻碍了聚合和材料的发展.
- 基于阿斯巴甜的表面活性剂提供了一种独特的分子设计方法.
研究的目的:
- 合成和表征一种新的基于阿斯巴甜的双头离子表面活性剂 (C18-AP-2Na).
- 调查C18-AP-2Na的自我组装行为和特性,在与阴离子表面活性剂混合的系统中.
- 探索由此产生的粘弹性溶液的潜在应用.
主要方法:
- 合成二乙醇-L-阿斯巴提尔-氨 (C18-AP-2Na) 的合成.
- 使用 cetyltrimethylammonium bromide (CTAB) 的混合表面活性剂系统的制备和表征.
- 风湿学测量以确定粘弹性特性.
- 低温传导电子显微镜 (Cryo-TEM) 用于可视化微粒结构.
- 耐盐性测试. 耐盐性测试. 耐盐性测试. 耐盐性测试. 耐盐性测试.
主要成果:
- C18-AP-2Na与CTAB表现出极好的兼容性,形成稳定,透明,粘弹性溶液.
- 混合溶液呈现出显著的粘度增加,达到14,000Pa s在13.2%的重量级与等极电荷比率.
- 化TEM揭示了纠的类似虫的微粒 (直径4-5纳米,长度为微米),起源于长的尾.
- 表面活性剂系统表现出了显著的耐盐性,粘度保持稳定,高达5%的NaCl度.
结论:
- 独特的C18-AP-2Na分子结构,具有氨基酸单元,促进水合,防止混合系统中的沉.
- 头组之间强大的静电吸引力通过最大限度地减少无机离子屏蔽来增强盐阻力.
- 开发的粘弹性,耐盐性配方显示出对增强石油回收,化品和智能材料的应用有重大前景.
- 这项研究为设计新型粘弹性系统提供了关于表面活性剂自我组装的宝贵见解.
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