Decyl esters production from soybean-based oils catalyzed by lipase immobilized on differently functionalized rice husk silica and their characterization as potential biolubricants

Octadecyl and sulfonyl modification of diatomite synergistically improved the immobilization efficiency of lipase and its application in the synthesis of pine sterol esters

“…Mendes et al. immobilized TLL ( Thermomyces lanuginosus lipase) using Octyl‐modified SiO 2 and obtained a final enzyme loading of 21.3 mg·g −1 , [ 31 ] suggesting that OSMD is very efficient as immobilized support for lipase.…”

“…In addition, the ratio of the two modifiers had a significant effect on the immobilization effect, and OSMD had the best immobilization effect with an enzyme loading of 74.40 mg⋅g −1 and an activity recovery of 63.35% at the ratio of -SO 3 H/-C 18 (1:1.5). Mendes et al immobilized TLL (Thermomyces lanuginosus lipase) using Octyl-modified SiO 2 and obtained a final enzyme loading of 21.3 mg⋅g −1 , [31] suggesting that OSMD is very efficient as immobilized support for lipase.…”

“…[30] Mendes et al found that the introduction of octyl groups on the SiO 2 surface is an important step in the preparation of biocatalysts with high operational stability. [31] Basso's research indicated that the octadecyl functional group can change the hydrophobic microenvironment of lipase, which can have a significant effect on the enzyme activity, [32] and Singh modified the surface of silica nanoparticles with carboxylic acids with different numbers of alkyl chains, and found that silica-immobilized lipase modified by stearic acid with more hydrophobicity has a higher activity. [33] Moreover, the production of water during the esterification reactions will drive the reaction toward hydrolysis and lead to enzyme inactivation via promoting the aggregation of enzymes.…”

Alkali Extraction to Detoxify Rice Husk-Derived Silica and Increase Its Biocompatibility

“…Silica nanoparticles (silica NPs) have found applications in a number of fields, such as the catalytic production of hydrogen, 1 biodiesel, 2 and lubricants, 3 as well as use as a substrate for enzyme immobilization 4 and in drug delivery and biomedical applications. 5 Whereas silica NPs can be synthesized using tetraethyl orthosilicate (TEOS) via several different methods, including the Stober method, 6 aerosol-assisted self-assembly, 7 soft-templating, 8 and evaporation-induced self-assembly, 9 researchers have found they are also biogenically produced within rice plants.…”

Magnetic cross-linked enzyme aggregate based on ionic liquid modification as a novel immobilized biocatalyst for phytosterol esterification

“…1). Avoiding organic solvent residues and ensuring food safety, [27][28][29][30][31] CRL-FIL-CLEAs@Fe 3 O 4 was further applied in a solvent-free catalyzed phytosterol esterification reaction. The formation of a hydrophilic layer on the biocatalyst surface due to water molecule accumulation in the esterification reaction reduced the catalytic activity of the lipase; [29][30][31][32][33][34][35] molecular sieves were used to remove water in this study.…”