The shape memory properties of biodegradable chitosan/poly(l-lactide) composites

Qinghao Meng, Jinlian Hu, Kaichiu Ho, Fenglong Ji, Shaojun Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

35 Citations (Scopus)

Abstract

The shape memory behavior of PLLA (poly(l-lactide)) and chitosan/PLLA composites was studied. PLLA and chitosan were compounded to fabricate novel materials which may have biodegradability and biocompatibility. Chitosan does not significantly affect the glass and melting transition temperature of the PLLA. Both the pure PLLA and chitosan/PLLA composites showed shape memory effect arising from the viscoelastic properties of PLLA comprised of semi crystalline structures. The shape recovery ratio of the chitosan/PLLA composites decreased significantly with increasing chitosan contents due to the incompatibility between PLLA and chitosan. Phase separation structures of the composites were observed by using atomic force microscopy. To obtain good shape memory effect, the chitosan content should be below 15 wt%.
Original languageEnglish
Pages (from-to)212-224
Number of pages13
JournalJournal of Polymers and the Environment
Volume17
Issue number3
DOIs
Publication statusPublished - 1 Sep 2009

Keywords

  • Chitosan
  • Poly(l-lactide)
  • Shape memory property

ASJC Scopus subject areas

  • Environmental Engineering
  • Polymers and Plastics
  • Materials Chemistry

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