文章摘要
基于金属离子交联的自修复聚丙烯酸水凝胶
Self-Healing Poly(acrylic acid) Hydrogels Based on Crosslinking of Metallic ion
  
DOI:10.16865/j.cnki.1000-7555.2018.07.003
中文关键词: 自修复水凝胶  聚丙烯酸  铁离子
英文关键词: self-healing hydrogel  poly(acrylic acid)  ferric ion
基金项目:国家自然科学基金资助项目(51304166);四川省青年科技基金(2016JQ0036);四川省教育厅成果转化重大培育项目(16CZ0007);大学生创新训练项目(201610615001,201710615006)
作者单位
薛诗山1,武元鹏1,刘兰芳1,任文豪1,林元华1,郑朝晖2,丁小斌2 1.西南石油大学 材料科学与工程学院,四川 成都 610500
2.中国科学院成都有机化学研究所,四川 成都 610041 
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中文摘要:
      自修复水凝胶在被破坏后,断裂部分能够自发愈合回复到初始状态,其具有重要的应用价值。文中利用Fe3+与聚丙烯酸分子链中羧基之间的相互作用,构筑具有自修复性能的水凝胶。聚合过程中,在丙烯酸单体中加入FeCl3 和过硫酸钾,在室温条件下引发丙烯酸聚合,反应6h后制得水凝胶。Fe3+在体系中同时起到交联剂和引发剂的作用。该方法制备时原料简单、反应条件温和,特别适合于规模化生产。所制备的水凝胶自修复速度快,12min内即可完全修复,修复后水凝胶力学性能基本能回复到修复以前的状态。而且水凝胶透明性好,适合于制备光学性能优异的水凝胶材料。
英文摘要:
      Self-healing hydrogels can autonomously recover to their original state after damage, which possess important potential promising applications. In this work, the interaction between ferric ion (Fe3+) and carboxyl (COOH) in the poly(acrylic acid) (PAA) chains was utilized to prepare the hydrogels with self-healing property. During the polymerization which was induced at the room temperature for 10 h, FeCl3and potassium persulfate (KPS) were added into the acrylic acid (AA) monomer to prepare PAA hydrogel. Fe3+ serves as both initiator and cross linker in the self-healing PAA hydrogels. The approach of fabricating self-healing hydrogels is facile, the reactive materials of the method are simple, and the reactive condition is easily realized. So the approach supported by this work is perfect for scale production of self-healing hydrogels. The self-healing velocity of the prepared hydrogel is rapid and the damaged sample can recover to the original shape in 12 min. Moreover, the hydrogel shows excellent transparency, which is propitious to prepare the hydrogel with unexceptionable optical performance.
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