Sulfonated syndiotactic polystyrene: sorption of ionic liquid in the amorphous phase and of organic guests in the crystalline phase
Sulfonated syndiotactic polystyrene: sorption of ionic liquid in the amorphous phase and of organic guests in the crystalline phase
复制标题
磺化间同立构聚苯乙烯：在非晶相中吸附离子液体，在结晶相中吸附有机客体
DOI：
10.1002/pat.3049
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发表时间：
2013
影响因子：
3.4
通讯作者：
G. Guerra
中科院分区：
文献类型：
--
作者：
Agata Dembna;V. Venditto;A. Albunia;R. Califano;G. Guerra
傅里叶变换红外光谱（FTIR）和广角x射线衍射（WAXD）测量清楚地证实了磺化聚苯乙烯样品具有双重吸附能力，其表现为纳米多孔δ晶相。事实上，离子液体（IL，如1-乙基-3-甲基咪唑二氰酰胺）的大量吸收（高达20-30 wt%）只发生在亲水的无定形磺化相中，而不会干扰疏水的纳米多孔晶体δ相。另一方面，有机客体（如萘）的大量吸收主要发生在纳米多孔疏水结晶相中，而不依赖于非晶相中IL的存在，最终导致共规聚苯乙烯共晶相的形成。在磺化聚苯乙烯薄膜的非晶相中加入IL，可以大大提高IL的热稳定性。版权所有©2012 John Wiley & Sons， Ltd。
Fourier Transform Infrared spectroscopy (FTIR) and Wide-Angle X-Ray Diffraction (WAXD) measurements have clearly established the occurrence of a dual sorption ability of sulfonated syndiotactic polystyrene samples, which exhibit the nanoporous δ crystalline phase. In fact, large uptake (up to 20–30 wt%) of ionic liquid (IL; e.g. 1-ethyl-3-methylimidazolium dicyanamide) occurs only in the hydrophilic amorphous sulfonated phases and does not disturb the hydrophobic nanoporous crystalline δ phase. On the other hand, a large uptake of organic guests (e.g. naphthalene) occurs prevailingly in the nanoporous hydrophobic crystalline phase, independently of the presence of the IL in the amorphous phase, eventually leading to the formation of syndiotactic polystyrene co-crystalline phases. The thermal stability of IL can be largely increased by their inclusion in the amorphous phase of sulfonated syndiotactic polystyrene films. Copyright © 2012 John Wiley & Sons, Ltd.