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Cited by 331

The DOI matches its Crossref record; 48 of the 48 references it cites were found in a registry or an index.

Self-Healable, Tough, and Ultrastretchable Nanocomposite Hydrogels Based on Reversible Polyacrylamide/Montmorillonite Adsorption

Gao, Guorong, Du, Gaolai, Sun, Yuanna, Fu, Jun·2015·ACS Applied Materials & Interfaces

Abstract

Nanocomposite hydrogels with unprecedented stretchability, toughness, and self-healing have been developed by in situ polymerization of acrylamide with the presence of exfoliated montmorillonite (MMT) layers as noncovalent cross-linkers. The exfoliated MMT clay nanoplatelets with high aspect ratios, as confirmed by transmission electron microscopy (TEM) and X-ray diffraction (XRD) results, are well dispersed in the polyacrylamide matrix. Strong polymer/MMT interaction was confirmed by Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC). The effective cross-link densities of these hydrogels are estimated in the range of 2.2-5.7 mol m(-3). Uniaxial tensile tests showed a very high fracture elongation up to 11 800% and a fracture toughness up to 10.1 MJ m(-3). Cyclic loading-unloading tests showed remarkable hysteresis, which indicates energy dissipation upon deformation. Residual strain after cyclic loadings could be recovered under mild conditions, with the recovery extent depending on clay content. A mechanism based on reversible desorption/adsorption of polymer chains on clay platelets surface is discussed. Finally, these nanocomposite hydrogels are demonstrated to fully heal by dry-reswell treatments.

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Metadata

Authors
Gao, G., Du, G., Sun, Y., & Fu, J.
Venue
ACS Applied Materials & Interfaces
Published
2015-02-18
Volume
7
Issue
8
Pages
5029-5037
ISSN
  • 1944-8244 (ISSN-L)
  • 1944-8252
OpenAlex
W2329807175
Cited by
331
References
48
FWCI
13.02
Type
journal article
Language
en
Open access
closed

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