Nanoclays for Lipase Immobilization: Biocatalyst Characterization and Activity in Polyester Synthesis

Polymers (Basel). 2016 Dec 1;8(12):416. doi: 10.3390/polym8120416.


The immobilization of Candida antarctica lipase B (CALB) was performed by physical adsorption on both neat and organo-modified forms of sepiolite and montmorillonite. The influence of different parameters, e.g., solvent, enzyme loading, cross-linking, and type of clay support, on immobilization efficiency and catalyst hydrolytic activity has been investigated. The highest hydrolytic activities were obtained for CALB immobilized on organo-modified clay minerals, highlighting the beneficial effect of organo-modification. The esterification activity of these CALB/organoclay catalysts was also tested in the ring-opening polymerization of ε-caprolactone. The polymerization kinetics observed for clay-immobilized catalysts confirmed that CALB adsorbed on organo-modified montmorillonite (CALB/MMTMOD) was the highest-performing catalytic system.

Keywords: Candida antarctica lipase B; immobilization; montmorillonite; organoclay; sepiolite; ε-caprolactone polymerization.