Enhanced Stability and Catalytic Performance of pH-Responsive Pickering Interface Biocatalysis via Electrostatically Mediated Immobilized Enzymes
文献类型： 外文期刊
作者： Zhong, Huaying;Liu, Run;Liu, Huihui;Zhang, Yi;Liu, Yihan;Zhang, Yufei;Zheng, Mingming
作者机构：
关键词： Pickering interface biocatalysis;electrostaticinteraction;smart response;emulsion reverse;immobilizedenzyme
期刊名称： ACS SUSTAINABLE CHEMISTRY & ENGINEERING
ISSN： 2168-0485
年卷期： 2025 年
页码：
收录情况： SCIE（2025版） ; ; EI（2025版）
摘要： A novel pH-responsive Pickering interfacial biocatalysis (PIB) system has been constructed. The oil-in-water emulsion was stabilized by immobilized enzyme CL@HMSS-DMAEMA, which was obtained through physical adsorption of lipase CL onto hollow mesoporous silicon spheres modified with 2-[dimethylamino]ethyl methacrylate (HMSS-DMAEMA). Within the pH response range of 3.0-11.0, the zeta potentials of the carrier and lipase exhibited opposite charges and almost mirror-symmetrical configuration, thereby ensuring electrostatic attraction throughout the demulsification/emulsification process. This strategy significantly enhanced enzyme loading, thermal stability, enzyme activity, and pH-responsive resilience. The pH-responsive PIB system achieved a 95.0% conversion rate for retinol fatty acid esters, with a catalytic efficiency (CE) 14.8 times higher than that of the PE system (CL@HMSS) and 25.2 times higher than that of free enzymes, while maintaining over an 80.0% conversion rate after 10 cycles. These findings underscore the importance of electrostatic interactions in enzyme immobilization, thereby improving the reliability of pH-responsive PIB platforms. The present study also proposes a novel design concept for the stimulus-response PIB system.
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