自愈水凝胶
肿胀 的
韧性
材料科学
单体
甲基丙烯酸酯
共聚物
聚合物
化学工程
胶束
高分子化学
极限抗拉强度
肺表面活性物质
十二烷基硫酸钠
复合材料
化学
水溶液
有机化学
工程类
作者
Pooria Rahmani,Akbar Shojaei
出处
期刊:Polymer
[Elsevier]
日期:2022-07-01
卷期号:254: 125037-125037
被引量:16
标识
DOI:10.1016/j.polymer.2022.125037
摘要
Hydrogels with remarkable hydrophilicity and tunable toughness are appealing materials to serve as superabsorbent polymers. However, chemically cross-linked hydrogels often suffer from low toughness regardless of their considerable swelling, restricting their widespread applications. In comparison, the network of physically cross-linked hydrogels can be regulated to meet both a high swelling ratio and considerable toughness. Here, we develop superabsorbent and tough hydrophobic associated hydrogels using terpolymerization of poly acrylic acid (PAA), polyacrylamide (PAM), and lauryl methacrylate (LMA) within the micelles formed by sodium dodecyl sulfate (SDS) surfactant. To this end, various parameters such as AA/AM molar ratio, the concentration of hydrophobic and hydrophilic monomers in the hydrogel network were optimized by morphological, mechanical, rheological, and swelling studies. The multiple physical interactions inside the hydrogel endow it with suitable mechanical properties (stretchability 1500–3000%, tensile strength 50–150kPa, and toughness up to 2.4 MJ/m3). On the other hand, the macroporous network of the hydrogels caused by the hydrophobic association is responsible for their outstanding swelling ratio. On this basis, the hydrogels can absorb water up to 1000 g/g while keeping their 3D network noticeably, exceeding the swelling degree of hydrophobic associated hydrogels reported till now. Such a fascinating feature can widen the hydrogels’ applications in various areas.
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