Improved reswelling behaviors and thermal stability of polyvinyl alcohol composite gels assisted by salt

被引：6
|
作者：
Zhang, Zhen [1 ]
Lucia, Lucian [1 ,2 ]
机构：
[1] NC State Univ, Dept Forest Biomat, Raleigh, NC 27695 USA
[2] NC State Univ, Dept Chem, Raleigh, NC 27695 USA
来源：
MATERIALS LETTERS | 2020年 / 281卷 / 281期
关键词：
Polyvinyl alcohol; Gel; Thermal stability; Reswelling; Composite; PVA; MEMBRANES;
D O I：
10.1016/j.matlet.2020.128743
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Deswelling and reswelling behaviors of polyvinyl alcohol (PVOH) gel systems were studied in which natural polymers promoted reswelling capacity of PVOH gels, while salt (NaCl) solutions de-swelled the hydrogels but improved the reswelling performance. Thermogravimetric analysis (TGA) results indicated that the salt treatment considerably improved the thermal stability. Differential scanning calorimetry (DSC) results indicated that the salt treatment hindered crystallization of all the systems except the urea system. The improved reswelling capacity might be attributed to changes in the crystalline region caused by the salt. (C) 2020 Elsevier B.V. All rights reserved.
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页数：4
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