Modification of tapioca starch by non-chemical route using jet atmospheric argon plasma

Rungtiwa Wongsagonsup; Panakamol Deeyai; Weerawut Chaiwat; Sawanee Horrungsiwat; Kesini Leejariensuk; Manop Suphantharika; Asira Fuongfuchat; Somsak Dangtip

doi:10.1016/j.carbpol.2013.10.089

Modification of tapioca starch by non-chemical route using jet atmospheric argon plasma

Carbohydr Polym. 2014 Feb 15:102:790-8. doi: 10.1016/j.carbpol.2013.10.089. Epub 2013 Nov 6.

Authors

Rungtiwa Wongsagonsup¹, Panakamol Deeyai², Weerawut Chaiwat³, Sawanee Horrungsiwat¹, Kesini Leejariensuk¹, Manop Suphantharika⁴, Asira Fuongfuchat⁵, Somsak Dangtip⁶

Affiliations

¹ Food Technology Program, Mahidol University, Kanchanaburi Campus, Kanchanaburi 71150, Thailand.
² Materials Science and Engineering Program, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
³ Environmental Engineering and Disasters Management Program, Mahidol University, Kanchanaburi Campus, Kanchanaburi 71150, Thailand.
⁴ Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
⁵ National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency (NSTDA), Ministry of Science and Technology, Klong Luang, Pathum Thani 12120, Thailand.
⁶ Department of Physics and NANOTEC CoE at Mahidol University, Faculty of Science, Mahidol University, Bangkok 10400, Thailand; ThEP Center, CHE, Ministry of Education, Bangkok 10400, Thailand. Electronic address: somsak.dan@mahidol.ac.th.

PMID: 24507348
DOI: 10.1016/j.carbpol.2013.10.089

Abstract

Non-chemical modification of tapioca starch was investigated using jet atmospheric argon plasma treatment. Two forms of starch slurry, i.e. granular starch (G) and cooked starch (C), were jet-treated by argon plasma generated by supplying input power of 50 W (denoted as G50 and C50 samples) and 100 W (denoted as G100 and C100 samples) for 5 min. Physical, rheological, and structural characteristics of the modified starch were investigated. The G50 and C100 samples had lower paste clarity but higher thermal stability and performed stronger gels (G50 only) compared to their control counterparts. On the other hand, the analyzed properties of the G100 and C50 samples showed the opposite trend. FTIR and (1)H NMR results revealed that the relative areas of COC and OH peaks were changed after the treatment. Cross-linking reaction seemed to predominantly take place for the G50 and C100 samples, whereas depolymerization predominated for the G100 and C50 samples.

Keywords: Cross-linking; Depolymerization; Jet atmospheric argon plasma; Modified tapioca starch; Rheological properties; Structural characteristics.