Facile preparation of agar/polyvinyl alcohol-based triple-network composite hydrogels with excellent mechanical performances
作者： Wei Hong , Na Li , Tifeng Jiao , Jinghong Li , Ran Wang
DOI: 10.1016/J.COLSURFA.2021.126270
关键词:
摘要: Abstract Triple-network hydrogels have different network structures and diversified cross-linking methods, which make it expected to become a widely used soft material. In this work, the freezing method is form hydrogen bond cross-linked physical between Agar molecular chains, then acrylic acid (AAc) chemical agent using free radical polymerization. The polyvinyl alcohol (PVA) molecules in hydrogel can increase winding degree of chain PVA semi-crystalline region. addition, Fe3+ system coordinated with carboxyl group on PAAc chain, addition carbon nanotubes (CNTs) increases mechanical properties stability composite hydrogel. prepared Agar/PAAc-Fe3+/PVA/CNTs shows good through coexistence covalent bonds dynamic reversible bonds. Furthermore, Agar/PAMAAc-Fe3+/PVA/CNTs triple-network based agar/polyacrylamide acid/polyvinyl (Agar/PAMAAc/PVA) was also prepared. Among them, acrylamide (AM) monomer AAc realize rapid self-recovery after 5 consecutive discontinuous compressions, respectively. This work provides new idea for preparation multifunctional thermal stability, self-recovery.
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