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genhunter

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爱与雨下: 金币+1 2017-11-27 21:45:33
NY_sky: 金币+200, 翻译EPI+1, ★★★★★最佳答案 2017-11-27 22:25:27
The SEC images of acid modified cellulose derivatives show that A has only a slight swelling; B shows a clear swelling, and cracks between fibers are visible, which increases the work surface for ion exchange and chelation; C shows the most extensive swelling, with obviously increased  porosity within fibers(多孔结构存在时载面积可以忽略不计了), which provides the structural basis for the biggest improvement in  ion exchange and chelation capacity. This is because the OA chain is short and has the strongest acidity, while CA is a tri-carboxylic acid with  5 carbon units spacing , which makes the inner channel the weakest degree of ionization.
离成功还差一点
2楼2017-11-27 10:18:44
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