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首页> 外文期刊>Journal of Applied Polymer Science >Carbon nanotubes/chitin nanowhiskers aerogel achieved by quaternization-induced gelation
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Carbon nanotubes/chitin nanowhiskers aerogel achieved by quaternization-induced gelation

机译：碳纳米管/几丁质纳米晶须气凝胶通过季铵化诱导的胶凝作用实现

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摘要

Organic aerogels from polysaccharides such as cellulose and chitin are of particular importance because they utilize renewable feedstocks. In this article, the aerogels were prepared through the self-assembly of chitin nanowhiskers previously modified. The surface of chitin nanowhiskers was rendered cationic through two reactions. A first reaction between hydroxyl groups of chitin and 2-chloroethyl isocyanate and a second reaction between the chloride groups of isocyanate anchored to the surface and 1-methylimidazole. This modification led to stable aqueous suspensions of the chitin nanowhiskers with gelation and rheological properties. Additionally, chitin nanowhiskers aerogels containing modified carbon nanotubes were obtained. The addition of modified carbon nanotubes provoked a change in the morphology of the hydrogels and as a consequence, the rheological properties of the hydrogel are modified as well. In contrast from previous procedures, this method has not required any kind of solvent exchange or high pressure in order to obtain the final materials. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42547.
机译：来自多糖如纤维素和甲壳质的有机气凝胶特别重要，因为它们利用了可再生原料。在本文中，通过预先修饰的几丁质纳米晶须的自组装制备了气凝胶。通过两个反应使几丁质纳米晶须的表面变为阳离子。几丁质的羟基与2-氯乙基异氰酸酯之间的第一反应以及锚定在表面上的异氰酸酯的氯基与1-甲基咪唑之间的第二反应。这种修饰导致了几丁质纳米晶须稳定的水悬浮液，具有凝胶化和流变特性。另外，获得了包含改性碳纳米管的几丁质纳米晶须气凝胶。改性碳纳米管的加入引起水凝胶形态的改变，因此，水凝胶的流变性质也被改性。与以前的程序相反，此方法不需要任何类型的溶剂交换或高压即可获得最终材料。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，42547。

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