W/O Pickering emulsion catalytic system stabilised by acetylated arachin/chitosan nanoparticles as an efficient platform for the preparation of diacylglycerol‐rich soybean oil

Abstract

SummaryPickering emulsions stabilised by nanoparticles are recognised as enzyme carriers, enabling advanced catalysis efficiency. Herein, we immobilised lipase on acetylated arachin nanoparticles/chitosan composites (AAPs/CS) through cross linking with glutaraldehyde (GDA) resulting in the formation of AAPs/CS‐Lipase to stabilise water in oil (W/O) Pickering emulsion catalytic systems (PEC). The specific activity of AAPs/CS‐Lipase was increased to 160% compared with free lipase (1.48 ± 0.02 U mg−1). Increasing the mass of CS led to an increase in the droplet size of W/O PEC from 2.53 ± 0.82 μm to 7.94 ± 1.24 μm. AAPs/CS‐Lipase decreased the interfacial tension and enhanced the interfacial viscosity of W/O PEC. The catalytic efficiency of W/O PEC is 2.75 times of biphasic catalytic system (BCS). The content of DAG exceeded 50% of the total oil. The specific activity of AAPs/CS‐Lipase remained above 70% even after 10 cycles. W/O PEC provided an efficient catalytic platform to prepare DAG‐rich soybean oil.