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pH可切换的W/O聚合物乳液:用于快速溶解阻力减速器的有希望的策略

Caifu Zhi¹, Yong Zhang¹, Yun Tian¹

¹College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China.

Langmuir : the ACS journal of surfaces and colloids

|September 20, 2023

概括

一种新型的pH可切换表面活性剂N-(2-morpholinoethyl) oleamide (NMEO) 增强了W/O乳液阻抗减速器的稳定性,并使得聚合物快速释放. 这项创新平衡了储存稳定性和快速溶解,为传统阻力减速器提供了有希望的替代方案.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
表面化学表面化学

背景情况:

传统的W/O乳液阻抗减速器使用水友性表面活性剂来改善聚合物溶解.
水友性表面活性剂可能会损害W/O乳液稳定性,导致存储和运输问题.
需要具有长期稳定性和快速溶解性的阻力减速器.

研究的目的:

设计和合成一个pH值可切换的表面活性剂,N-(2-morpholinoethyl) oleamide (NMEO),用于稳定W/O乳液阻力减速器.
为了研究pH触发的相位逆转和NMEO稳定乳液的快速释放能力.
为了评估新系统的存储稳定性,溶解时间和阻抗减速性能.

主要方法:

合成N-(2-morpholinoethyl) oleamide (NMEO) 作为一个可以切换pH的表面活性剂.
在优化条件下 (油水比为0.429,NMEO 3重%,pH 6.5) 进行聚合 (?? 烯胺-协同-烯酸-协同-2-烯胺-2-甲基硫酸) 的逆乳液聚合.
通过pH刺激评估乳液稳定性,聚合物释放动力学和阻力减轻效率.

主要成果:

NMEO有效地稳定了W/O聚合物乳液,允许在没有水友性表面活性剂的情况下储存超过30天.
pH刺激 (pH < 6) 诱导了快速相位逆转和在2.5分钟内完全溶解聚合物.
基于NMEO的阻力减速器在0.021 wt%度下实现了64.67%的阻力减速.
该系统在长时间的储存稳定性和快速溶解之间取得了平衡.

结论:

NMEO是一种高效的pH可切换表面活性剂,用于稳定W/O乳液阻力减速器.
稳定NMEO系统在储存稳定性和快速的聚合物释放动力学方面提供了显著的优势.
这种pH可切换的方法为传统阻力减速器的局限性提供了可行的解决方案,对实际应用有很大的希望.

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