Super-tough and thermo-healable hydrogel - Promising for shape-memory absorbent fiber

Xinkun Lu, Ching Ying Chan, Ka I. Lee, Pui Fai Ng, Bin Fei, John Haozhong Xin, Jun Fu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

82 Citations (Scopus)

Abstract

Recoverable hydrogels with high stretch and toughness have been synthesized by a one-step radical polymerization. They consist of covalently crosslinked polyacrylamide (PAAm) and ionically crosslinked carrageenan. Such double network (DN) hydrogels can be stretched beyond 20 times their initial length, and their fracture energy reached a high value of ∼9500 J m-2. By comparing hydrogel tensile properties at different temperatures, the contribution of ionic network to the toughness was quantitatively determined in percentage for the first time. The stretched hydrogels were completely healed by short treatment at a mild temperature. Through drying at stretch, they were also transformed into stiff absorbent fibers that still preserved their shape memory of wet state.
Original languageEnglish
Pages (from-to)7631-7638
Number of pages8
JournalJournal of Materials Chemistry B
Volume2
Issue number43
DOIs
Publication statusPublished - 21 Nov 2014

ASJC Scopus subject areas

  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)

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