Bacterial cellulose reinforced double-network hydrogels for shape memory strand

Jiachuan Hua, Chang Liu, Pui Fai Ng, Bin Fei

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

Tough hydrogels with shape memory property are highly desirable for actuators and smart engineering materials. Herein, super-tough polyacrylamide/iota-carrageenan double-network hydrogels were synthesized via a one-pot radical polymerization and strengthened by incorporating bacterial cellulose microclusters, through the intermolecular hydrogen bonds and topological interlock between microclusters and polymer network. Such hydrogels were able to withstand over 200 kPa of tensile stress, or be stretched over 27 times of initial length, and reached a high toughness of ∼2000 kJ/m3. By tension-drying and post-annealing treatments on the strongest hydrogel, dry strands were fabricated to withstand over 100 MPa of tensile stress. Moreover, these strands presented water-stimulated shape memory by a recovery ratio of 84.3 % in 4 min. Based on these characteristics, this super-tough hydrogel may serve as smart textile or actuator for a variety of applications.

Original languageEnglish
Article number117737
JournalCarbohydrate Polymers
Volume259
DOIs
Publication statusPublished - 1 May 2021

Keywords

  • Bacterial cellulose
  • Double-network hydrogel
  • Shape memory
  • Strengthening
  • Topological interlock

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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