Esterification of 4-methyloctanoic acid with polyethylene glycol at different aw

Novozym 435? (immobilized Candida antarctica lipase B) was used to esterify 4-methyloctanoic acid with polyethylene glycols (PEGs) of different molecular weights (PEG-600, PEG-3000 and PEG-20000) at different water activities. A system composed of 4-methyloctanoic acid and PEG-600 was monophasic, ex...

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Bibliographic Details
Published in:Biocatalysis and Biotransformation
Main Authors: Heinsman, N.W.J.T., Teixeira, A., van der Weide, P.L.J., Franssen, M.C.R., van der Padt, A., de Groot, A., van 't Riet, K.
Format: Article in Journal/Newspaper
Language:English
Published: 2001
Subjects:
4-methyloctanoic acid
Esterification
Polyethylene glycol
Water activity
Antarc*
Antarctica
Online Access:https://research.wur.nl/en/publications/esterification-of-4-methyloctanoic-acid-with-polyethylene-glycol-
https://doi.org/10.3109/10242420109105263
Description
Summary:Novozym 435? (immobilized Candida antarctica lipase B) was used to esterify 4-methyloctanoic acid with polyethylene glycols (PEGs) of different molecular weights (PEG-600, PEG-3000 and PEG-20000) at different water activities. A system composed of 4-methyloctanoic acid and PEG-600 was monophasic, except at a high water activity. Even at a water activity of 0.8, PEG was still converted to its mono- or diester, which proves the unique character of PEG. The PEG-esters accumulated in the apolar phase.

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