亚胺
共价键
肺表面活性物质
化学
化学工程
乳状液
乳液聚合
动态光散射
表面张力
聚合
傅里叶变换红外光谱
席夫碱
有机化学
高分子化学
聚合物
纳米颗粒
催化作用
工程类
物理
量子力学
生物化学
作者
Xiran He,Bin Chen,Shuai He,Xin Su,Yuanpeng Wu
标识
DOI:10.1016/j.molliq.2023.123792
摘要
Efficient demulsification of emulsions is crucial in heavy oil transportation, interfacial reactions, and emulsion polymerization applications. Surfactants that are responsive to the environment have the ability to alter their surface activity in a dynamic manner. However, these types of surfactants typically require a significant amount of energy and may be less efficient. The present study involved the preparation of a surfactant with dynamic covalent bonding and pH-responsive property. This was achieved through the creation of dynamic imine bonds between decyloxybenzaldehyde (DOBA) and sodium 3-amino-1-propanesulfonate (AP) via a Schiff base reaction to synthesize dynamic covalent surfactant CB. The present study aimed to investigate the impact of various pH environments on the conversion rate and interfacial tension of surfactant CB. To achieve this objective, 1H NMR, FTIR, and IFT tests were conducted. The results confirmed the reversible conversion of the dynamic imine bond with pH. Furthermore, the dynamic imine bonded surfactant demonstrated the ability to complete at least three emulsification-breakage cycles. The present investigation introduces a novel approach for the synthesis of pH-responsive surfactants through the utilization of dynamic covalent bonds.
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