Cellulose/Chitosan Composite Multifilament Fibers with Two-Switch Shape Memory Performance

Kunkun Zhu, Yang Wang, Ang Lu, Qiang Fu, Jinlian Hu, Lina Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

18 Citations (Scopus)

Abstract

Because of the serious pollution caused by nondegradable plastic waste, environmentally benign materials from sustainable polymers have attracted tremendous research interest. Especially, functional fibers with good mechanical properties, shape memory behavior, and biodegradability have been required in the fields of smart textiles, sensors, and intelligent robots. Here, a new solvent, 4.5 wt % LiOH/7.5 wt % KOH/11.5 wt % urea aqueous solution, was developed to prepare stable cellulose/chitosan composite solution. Subsequently, cellulose/chitosan composite (CLS) fibers were spun successfully from the mixture solution on a lab-scale spinning machine. The CLS fibers exhibited good mechanical properties with tensile strength of 3.2 cN/dtex in the dry state and 2.9 cN/dtex in the wet state, as a result of the combination of good miscibility between two components and their nanofiber self-assembly driven by self-aggregation force through hydrogen bonding interactions. Interestingly, the CLS fibers showed a two-switch shape memory behaviors under water and acid stimulations. By changing the external stimulation, the strong self-aggregation force between cellulose and chitosan could be destroyed partly and then restructured to fix and recover, resulting in a designed shape. This work provided a new method for fabricating high strength and functional fibers for industry, which will promote the development of smart textiles.

Original languageEnglish
Pages (from-to)6981-6990
Number of pages10
JournalACS Sustainable Chemistry and Engineering
Volume7
Issue number7
DOIs
Publication statusPublished - 1 Apr 2019

Keywords

  • Cellulose
  • Chitosan
  • Environmentally benign material
  • Functional fiber
  • Shape memory

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment

Cite this