Nanoclay Reinforced Self-Cross-Linking Poly(N-Hydroxyethyl Acrylamide) Hydrogels with Integrated High Performances

作者：Yu, Xianqiang; Li, Yu; Yang, Jia^*; Chen, Feng; Tang, Ziqing; Zhu, Lin; Qin, Gang; Dai, Yahui; Chen, Qiang^*

来源：Macromolecular Materials and Engineering, 2018, 303(9): 1800295.

DOI：10.1002/mame.201800295

• high strength
• high toughness
• nanocomposite hydrogels
• self-healing
• self-recovery

Despite recent significant progress in fabricating tough hydrogels, it is still a challenge to realize high strength, large stretchability, high toughness, rapid recoverability, and good self-healing simultaneously in a single hydrogel. Herein, Laponite reinforced self-cross-linking poly(N-hydroxyethyl acrylamide) (PHEAA) hydrogels (i.e., PHEAA/Laponite nanocomposite [NC] gels) with dual physically cross-linked network structures, where PHEAA chains can be self-cross-linked by themselves and also cross-linked by Laponite nanoplatelets, demonstrate integrated high performances. At optimal conditions, PHEAA/Laponite NC gels exhibit high tensile strength of 1.31MPa, ultrahigh tensile strain of 52.23mmmm(-1), high toughness of 2238Jm(-2), rapid self-recoverability (toughness recovery of 79% and stiffness recovery of 74% at room temperature for 2min recovery without any external stimuli), and good self-healing properties (strain healing efficiency of 42%). The work provides a promising and simple strategy for the fabrication of dual physically cross-linked NC gels with integrated high performances, and helps to expand the fundamentals and applications of NC gels.

• 出版日期2018-9
• 单位河南理工大学