摘要
乳液在许多工业生产和商品制造过程中扮演着极为重要的角色。如何实现乳液的长期稳定性与快速破乳之间的平衡已成为乳液研究的重中之重。环境刺激响应型乳液的出现为这一问题的解决提供了新的思路。在过去的十年中,CO_2作为一种传统pH调节剂的替代者,引起了科研工作者的普遍关注。虽然CO_2本质上就是一种pH调节剂,但其相对于传统的酸碱调节却具有无可比拟的优势。直到最近,以CO_2作为触发手段开关乳液才得以实现。CO_2响应型乳液体系是指在CO_2气体刺激下能够对乳液的"稳定"与"破乳"进行智能调控的分散体系,其在石油生产、乳液聚合、萃取分离、化妆品等领域具有巨大的应用潜力。本文从普通乳液、Pickering乳液和微乳液三个方面详细综述了CO_2气体刺激在分散体系的研究进展,介绍了CO_2响应型乳液体系的智能响应原理、性能及应用,并展望了其发展前景。
Emulsions play an important role in a number of industrial processes and commercial products where immiscible liquid phases coexist. Recently how to balance the long-term stability and quick demulsification has become a key focus in emulsions. The emergence of stimuli-responsive emulsions has brought a ray of daw n.Over the past decade,CO2 as alternative of pH has aroused considerable attention in the fields of surfactants and their aggregates,polymers,solvents,as well as microemulsions,because of its renew ability,low cost and good biocompatibility. Essentially CO2 acts as pH,but the former offers more advantages over the latter. However,the focus until recently shifted to the utilization of CO2 as a trigger for triggering emulsions between ＂on ＂（ stable） or＂off＂（ unstable） states. These CO2-responsive emulsions show considerable application potential in oil recovery,emulsion polymerization,extraction separation,cosmetics and other fields,because they can smartly response to the removal or bubbling of CO2 gas,reflecting in emulsification or demulsification of oil/water mixture. In this review,we highlight the recent advances in this field from general emulsion,Pickering emulsion,and microemulsion,respectively. The principle,performance and applications of the CO2-responsive emulsion system are introduced in details,and their future development and perspectives are also outlooked.
出处
《化学进展》
SCIE
CAS
CSCD
北大核心
2017年第7期695-705,共11页
Progress in Chemistry
基金
国家自然科学基金项目(No.21503094)资助~~
