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首页> 外文期刊>Journal of Applied Polymer Science >Crystallinity and surface state of cellulose in wet ball-milling process
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Crystallinity and surface state of cellulose in wet ball-milling process

机译：湿球磨过程中纤维素的结晶度和表面状态

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摘要

We report the effect of wet ball-milling process under mild neutral salt conditions on the alteration of crystallinity and surface state of microcrystalline cellulose (MC). The ball-milling experiments were performed when the MC was immersed in H2O, NaCl aqueous solution, and KCl aqueous solution. Two collation groups, i.e., MC immersed in H2O2 and nonimmersed MC were additionally investigated for comparison. Except when H2O2 was present, the highest decrease in the cellulose crystallinity index (CI) was observed in dilute KCl. On the other hand, the CI of wet-milled MC/NaCl was greater than that of the wet-milled MC/H2O, however, still lower than that of the non-immersed MC. XPS results showed that the carbonization progressed in dry-milled MC and wet-milled MC/NaCl surfaces. Though, the surface oxidization progressed in wet-milled MC/H2O and wet-milled MC/KCl. Lastly, the ball-milling processes in different solutions led to various decreases of the crystallinity and the surface degradation due to carbonization and/or oxidization. (C) 2017 Wiley Periodicals, Inc. J. Appl. Polym.
机译：我们在轻度中性盐条件下报告了湿球磨过程对微晶纤维素（MC）结晶度和表面状态的改变。当MC浸入H 2 O，NaCl水溶液和KCl水溶液中时，进行球磨实验。另外研究了两个污污组，即浸入H 2 O 2和非热MC中的MC进行比较。除了存在H 2 O 2时，在稀释的KCl中观察到纤维素结晶度指数（CI）的最高降低。另一方面，湿磨的MC / NaCl的CI大于湿磨的MC / H 2 O的CI，然而仍然低于非浸没MC的CI。 XPS结果表明，碳化在干磨床MC和湿磨的MC / NaCl表面中进展。然而，表面氧化在湿磨的MC / H 2 O和湿磨的MC / KCl中进行。最后，不同溶液中的球磨过程导致结晶度的各种降低和由于碳化和/或氧化而导致的表面劣化。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。

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