皮克林乳液
乳状液
催化作用
化学
脂肪酶
吸附
壳聚糖
化学工程
水解
木质素
纳米颗粒
有机化学
酶
工程类
作者
Chuanmei Tang,Yingying Chai,Chaoxuan Wang,Zixuan Wang,Jiwei Min,Yuefei Wang,Wei Qi,Rongxin Su,Zhimin He
出处
期刊:Langmuir
[American Chemical Society]
日期:2022-10-10
卷期号:38 (42): 12849-12858
被引量:5
标识
DOI:10.1021/acs.langmuir.2c01819
摘要
In this study, we construct a green and high-performance platform using Pickering emulsions for biphasic catalysis. The oil-in-water Pickering emulsions stabilized by the lignin/chitosan nanoparticles (Lig/Chi NPs) have great stability and alkali resistance, showing pH-responsive reversible emulsification and demulsification which can be recycled at least three times. The Pickering emulsion also has fluorescence and wide availability to different oil-to-water volume ratios, types of oil, storage times, temperatures, and ion concentrations. When this system is applied to the lipase-catalyzed reaction for the hydrolysis of p-nitrophenol palmitate, it will provide stable and large oil-water reaction interface areas, and the negatively charged lipase will enrich at the emulsion interface by electrostatic adsorption of the positively charged Lig/Chi NPs to achieve immobilization (lipase-Lig/Chi NPs). The reaction conversion rate can reach nearly 100% in 30 min, which is nearly three times higher than that of the conventional two-phase system. Moreover, the lipases in Pickering emulsion stabilized by Lig/Chi NPs exhibit great recyclability because of the protection of Lig/Chi NPs.
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