title: Modification of tapioca starch by non-chemical route using jet atmospheric argon plasma.
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.
authors: Food Technology Program, Mahidol University, Kanchanaburi Campus, Kanchanaburi 71150, Thailand.
authors: Rungtiwa
authors: R
authors: Wongsagonsup
authors: Materials Science and Engineering Program, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
authors: Panakamol
authors: P
authors: Deeyai
authors: Environmental Engineering and Disasters Management Program, Mahidol University, Kanchanaburi Campus, Kanchanaburi 71150, Thailand.
authors: Weerawut
authors: W
authors: Chaiwat
authors: Food Technology Program, Mahidol University, Kanchanaburi Campus, Kanchanaburi 71150, Thailand.
authors: Sawanee
authors: S
authors: Horrungsiwat
authors: Food Technology Program, Mahidol University, Kanchanaburi Campus, Kanchanaburi 71150, Thailand.
authors: Kesini
authors: K
authors: Leejariensuk
authors: Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
authors: Manop
authors: M
authors: Suphantharika
authors: 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.
authors: Asira
authors: A
authors: Fuongfuchat
authors: 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.
authors: Somsak
authors: S
authors: Dangtip
keywords: Cross-linking; Depolymerization; Jet atmospheric argon plasma; Modified tapioca starch; Rheological properties; Structural characteristics