Research Institute for Applied Physics and Astronomy, University of Tabriz, Tabriz, Iran.
Research Institute for Applied Physics and Astronomy, University of Tabriz, Tabriz, Iran.
Carbohydr Polym. 2015;127:72-8. doi: 10.1016/j.carbpol.2015.03.056. Epub 2015 Mar 30.
The wheat starch was investigated, before and after exposure to the argon and oxygen glow discharge plasma, without any added chemical reagents, using a novel media polarity functions method. The mechanisms of modification of starch in plasma discharge irradiation were explained using some methods such as; NMR, IR spectroscopy, Kamlet-Abboud-Taft polarity functions (specific and nonspecific interaction) of modified starch. The starch modification, by plasma treatment, shows valuable changes with plasma gas and relative ionized or active species. Characterizations indicate that argon glow discharge plasma increases crosslink in C-2 site of starch. Also, oxygen plasma discharge irradiation tends to oxidize the OH group in C-6 site of carbonyl group. Furthermore, the reported mechanisms show the highest efficiency, because of the stereo-chemical orientation of active sites of starch and plasma potential of wall in plasma media.
使用一种新颖的介质极性函数方法，研究了小麦淀粉在未经任何外加化学试剂的氩气和氧气辉光放电等离子体处理前后的情况。利用 NMR、IR 光谱、改性淀粉的 Kamlet-Abboud-Taft 极性函数（特异性和非特异性相互作用）等方法，解释了淀粉在等离子体放电辐照下的修饰机制。通过等离子体处理，淀粉的修饰显示出与等离子体气体和相对电离或活性物质有价值的变化。特性分析表明，氩气辉光放电等离子体增加了淀粉 C-2 位的交联。此外，氧等离子体放电辐照倾向于氧化 C-6 位羰基的 OH 基团。此外，由于淀粉活性位点的立体化学取向和等离子体介质中壁的等离子体势，所报道的机制显示出最高的效率。
