Shape Memory Hydrogel based on a Hydrophobically-Modified Polyacrylamide (HMPAM)/α-CD Mixture via a Host-Guest Approach

Macromolecular Rapid Communications
Akram YasinXingyuan Zhang

Abstract

A novel thermally sensitive shape memory (SM) hydrogel is prepared by block copoly-merization of a cationic surfactant monomer, dimethylhexadecyl[2-(dimethylamino)ethylmethacrylate]ammoniumbromide (C(16)DMAEMA), and acrylamide (AM) in the presence of α-cyclodextrin (α-CD) using N,N'-methylenebisacrylamide (MBA) as a crosslinker. XRD, solid state (13)C NMR, and DSC measurements show that the crystalline domains, induced by the hydrogen bonds between α-CDs threaded on the hydrophobic units of the polymer chains through the host-guest approach, can reversibly melt and crystallize at different temperatures. Rheological measurements show that both the elastic modulus G' and viscous modulus G'' drastically change due to the formation and dissolution of the crystalline domains. These thermo-sensitive crystalline domains serve as reversible physical crosslinks, endowing the hydrogel with excellent SM properties. Cyclic experiments show that the hydrogel can recover to almost 100% of the deformation in each cycle and can be reused several times.

References

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Citations

Sep 21, 2016·ACS Applied Materials & Interfaces·Ya-Nan ChenHuiliang Wang
Feb 22, 2017·ACS Applied Materials & Interfaces·Xiaoxia LeTao Chen
May 30, 2017·ACS Applied Materials & Interfaces·Zhi-Chao JiangSheng Zhang
Mar 1, 2017·Angewandte Chemie·Bernhard V K J Schmidt, Christopher Barner-Kowollik
Sep 20, 2019·Macromolecular Rapid Communications·Esteban M EutiCecilia I Alvarez Igarzabal
Jan 7, 2017·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Bing XueEugenia Kharlampieva
Mar 21, 2016·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Wei FengHaiyang Yang
May 26, 2017·Macromolecular Rapid Communications·Zhi-Chao JiangSheng Zhang
Mar 29, 2016·ACS Applied Materials & Interfaces·Benjamin Qi Yu ChanXian Jun Loh

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