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.
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