Journal
MATERIALS LETTERS
Volume 207, Issue -, Pages 53-56Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2017.07.056
Keywords
Hydrogel; Polymers; One-pot; Composite materials; Triple-network; High strength
Funding
- National Natural Science Foundation of China [51662036, 21467024]
- Bingtuan Innovation Team in Key Areas [2015BD003]
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We recently proposed and demonstrated a novel strategy to improve mechanical strength by designing triple-network (TN) structure. The hydrogel composed of polyacrylamide (PAM), gelatin (Gela) and polyvinyl alcohol (PVA) was prepared by a simple one-pot method of copolymerization, cooling and freezing/thawing. The PAM/Gela/PVA hydrogels with 2% Gela and 8% PVA could achieve high mechanical properties, the strain and stress at break were 256% and 500 kPa, respectively, and the compression strength could reach 4.6 MPa under the deformation of 85% which exhibited superior mechanical properties than those of single network (SN) and double network (DN) hydrogels. What's more, the hydrogels exhibited self-healing property. Thus, the TN concept should be applicable to developing tough hydrogels which provided insight into how these polymers played a role as structural components in cartilage and other tissues. (C) 2017 Published by Elsevier B. V.
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