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Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/43476
Title: Argon Plasma Treatment of Tapioca Starch Using a Semi-continuous Downer Reactor
Authors: Weerawut Chaiwat
Rungtiwa Wongsagonsup
Nutticha Tangpanichyanon
Tanchanok Jariyaporn
Panakamol Deeyai
Manop Suphantharika
Asira Fuongfuchat
Mudtorlep Nisoa
Somsak Dangtip
Mahidol University
King Mongkut's University of Technology North Bangkok
Thailand National Science and Technology Development Agency
Walailak University
Keywords: Agricultural and Biological Sciences;Chemical Engineering;Engineering
Issue Date: 1-Jul-2016
Citation: Food and Bioprocess Technology. Vol.9, No.7 (2016), 1125-1134
Abstract: © 2016, Springer Science+Business Media New York. To develop a novel modification process of tapioca starch using low-pressure argon plasma treatment in a large-scale production, a semi-continuous downer reactor was designed to provide a production rate of 0.1–0.5 kg per cycle. Physicochemical and rheological properties of plasma-treated starch were investigated in order to predict the phenomena occurred during the plasma treatment. Native tapioca starch (NTS) was plasma-treated for 1, 3, or 6 cycles, which were referred to as PTS-1, PTS-3, or PTS-6 samples, respectively. Plasma treatment of the NTS resulted in a significant decrease (P < 0.05) in paste clarity and Rapid Visco Analyzer (RVA) breakdown viscosity, and an increase in gel strength of starch. The PTS-1 had the lowest paste clarity of 39.85 %T at 650 nm and breakdown viscosity of 29.71 Rapid Visco Unit (RVU), and the highest gel strength, e.g., G′ = 5.47ω0.32. With increasing the number of treatment cycles, i.e., the PTS-3 and PTS-6, the paste clarity and breakdown viscosity significantly increased (P < 0.05), while the gel strength decreased. The Fourier transform infrared (FTIR) spectroscopy via relative areas of C–O–C peaks indicated that the PTS-1 had a significant increase (P < 0.05) in the C–O–C cross-linked bonds compared to the NTS, but the effect of depolymerization could further suppress the cross-linking reaction when the number of treatment cycle was increased. Taking an advantage of a very short residence time (less than 0.3 s) in the plasma downer reactor, the semi-continuous process of starch modification could be developed for a commercial production of non-chemically modified starch with a relatively low degree of cross-linking.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84959359116&origin=inward
http://repository.li.mahidol.ac.th/dspace/handle/123456789/43476
ISSN: 19355149
19355130
Appears in Collections:Scopus 2016-2017

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