Phase-separation induced extraordinary toughening of magnetic hydrogels
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Phase-separation induced extraordinary toughening of magnetic hydrogels
- 发表刊物：
- Journal of Applied Physics
- 摘要：
- Phase separation markedly influences the physical properties of hydrogels. Here, we find that poly
(N, N-dimethylacrylamide) (PDMA) hydrogels suffer from phase separation in aqueous sodium
hydroxide solutions when the concentration is higher than 2 M. The polymer volume fraction and
mechanical properties show an abrupt change around the transition point. We utilize this phase
separation mechanism to synthesize tough magnetic PDMA hydrogels with the in-situ precipitation
method. For comparison, we also prepared magnetic poly (2-acrylamido-2-methyl-propane sulfonic
acid sodium) (PNaAMPS) magnetic hydrogels, where no phase separation occurs. The phaseseparated
magnetic PDMA hydrogels exhibit an extraordinarily high toughness of 1000 J m2;
while non-phase-separated magnetic PNaAMPS hydrogels only show a toughness of 1 Jm2, three
orders of magnitude lower than that of PDMA hydrogels. This phase separation mechanism may
become a new approach to prepare tough magnetic hydrogels and inspire more applications.
- 合写作者：
- Tang, JD; Li, CH; Li, HM; Lv, ZY; Sheng, H; Lu, TQ; Wang, TJ
- 是否译文：
- 否
- 发表时间：
- 2018-05-09