The enzymatic hydrolysis of starch-based PVOH and polyol plasticised blends

Russo, M.A.L., Truss, R.W. and Halley, P.J. (2009) The enzymatic hydrolysis of starch-based PVOH and polyol plasticised blends. CARBOHYDRATE POLYMERS, 77 3: 442-448. doi:10.1016/j.carbpol.2008.12.033

Author Russo, M.A.L.
Truss, R.W.
Halley, P.J.
Title The enzymatic hydrolysis of starch-based PVOH and polyol plasticised blends
Journal name CARBOHYDRATE POLYMERS   Check publisher's open access policy
ISSN 0144-8617
Publication date 2009-07-01
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.carbpol.2008.12.033
Open Access Status Not yet assessed
Volume 77
Issue 3
Start page 442
End page 448
Total pages 7
Editor Kennedy, J.F.
Place of publication U.K.
Publisher Pergamon
Language eng
Subject C1
091209 Polymers and Plastics
860607 Plastic Products (incl. Construction Materials)
Abstract Thermoplastic starch (TPS) materials present several advantages to the plastic industry and when blended with other materials they can exhibit improved mechanical and moisture sensitivity properties compared to pure TPS materials. However, the biodegradability of these blends, through such processes as enzymatic degradation, needs to be characterised to ensure the beneficial properties of TPS are not compromised. The aims of the study were to investigate the effect of varying polyvinyl alcohol (PVOH) content and polyol type within the TPS blends on the rate and extent of starch enzymatic hydrolysis using enzymes alpha-amylase and amyloglucosidase. The results of this study have revealed that TPS:PVOH blends with a PVOH content at 50 wt% exhibited a significantly reduced rate and extent of starch hydrolysis. The results suggest that this may have been attributed to interactions between starch and PVOH that further prevented enzymatic attack on the remaining starch phases within the blend. The extent of starch hydrolysis was not significantly affected by polyol type, however, the rate of starch hydrolysis from the maltitol blend was significantly reduced compared to sorbitol and glycerol substrates. Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved.
Keyword Starch
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

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Created: Thu, 03 Sep 2009, 17:57:41 EST by Mr Andrew Martlew on behalf of School of Chemical Engineering