Clarification of Surface Deswelling of Thermoresponsive Microgels by Electrophoresis
Clarification of Surface Deswelling of Thermoresponsive Microgels by Electrophoresis
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通过电泳澄清热响应性微凝胶的表面消溶胀
DOI：
10.1021/acs.langmuir.2c02742
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发表时间：
2022
期刊：
影响因子：
3.9
通讯作者：
Suzuki Daisuke
中科院分区：
文献类型：
--
作者：
Nishizawa Yuichiro;Inui Takumi;Namioka Ryuji;Uchihashi Takayuki;Watanabe Takumi;Suzuki Daisuke
虽然已经报道了许多温敏微凝胶的研究，但其在胶体科学中至关重要的表面性质仍然没有完全了解。在这项研究中，微凝胶与表面局部带电基团的沉淀聚合合成，并分析其电泳行为使用修改版本的Ohshima的方程，以获得两个软粒子的表面性质：柔软度参数和表面电荷密度。这种系统的评价使我们能够讨论的整体微凝胶和它们的表面分别的热响应性。此外，从电泳获得的表面性质的有效性进行了验证，通过比较它们与种子乳液聚合的结果中存在的微凝胶和通过高速原子力显微镜（HS-AFM）获得的力压痕曲线。
Although many investigations of thermoresponsive microgels have been reported, their surface properties, which are crucial in colloid science, are still not fully understood. In this study, microgels with surface-localized charged groups were synthesized by precipitation polymerization, and their electrophoretic behaviors were analyzed using a modified version of Ohshima’s equation to obtain two surface properties of the soft particles: the softness parameter and the surface charge density. This systematic evaluation allows us to discuss the thermoresponsiveness of the overall microgels and their surfaces separately. Furthermore, the validity of the surface properties obtained from electrophoresis was verified by comparing them with the results of seeded emulsion polymerization in the presence of the microgels and the force–indentation curves obtained via high-speed atomic force microscopy (HS-AFM).