writer：Lei Tian, Panpan Zhao, Xue Li, Zafar Ali, Xiangjie Li, Baoliang Zhang, Hepen
keywords：biocatalysis · enzymes · heterogeneous catalysis · polymers · supported catalysts
source：期刊
specific source：http://onlinelibrary.wiley.com/doi/10.1002/cctc.201600413/full
Issue time：2016年

Raspberry-shaped microparticles with adjustable protrusions and functional groups were synthesized and applied as carriers for the immobilization of lipase. The structural advantages of the raspberry-shaped microcarriers with immobilized lipase (RM-IL) are not only that the protrusions are constructed to play the role of a spacer arm, but the block structure enhances the bioactivity of lipase at the oil–water interface. The activation method used for the carrier has a significant effect on the performance of immobilized lipase. RM-IL prepared by carboxylic acid activation has a 3.5-fold increase of activity compared with that from amine activation and generates a fourfold increase of protein bound to 164?mg?g?1 of carrier. Finally, RM-IL is used as an environmentally friendly and high-efficiency biocatalyst to catalyze the esterification of oleic acid for biodiesel under mild conditions, and the conversion can reach up to 82.1?%. Above all, raspberry-shaped microcarriers prepared by an improved seed emulsion polymerization have prospects for industrialization.