Reinforcing and toughening effects of bamboo pulp fiber on poly(3-hydroxybutyrate-C0-3-hydroxyvalerate) fiber composites

Long Jiang, Feng Chen, Jun Qian, Jijun Huang, Michael P Wolcott, Linshu Liu, Jinwen Zhang

Research output: Contribution to journalArticle

39 Scopus citations

Abstract

In this work, poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)/bamboo pulp fiber composites were melt-compounded and injection-molded. Tensile, impact and dynamic mechanical properties of the composites were studied. In contrast to many other short natural fiber reinforced biocomposites which demonstrate decreased strain-at-break, impact toughness and tensile strength, the PHBV/bamboo pulp fiber composites displayed increased tensile strength and impact toughness, and maintained/increased strain-at-break. Microscopic study of the fracture surfaces revealed extensive fiber pullout in both tensile and impact tests. The fiber pullout suggests insufficient interfacial adhesion between the fiber and the matrix. The pullout process in the impact testing dissipated a significant amount of energy and hence substantially improved the impact toughness of the composites. With the improved interfacial adhesion provided by coupling agent polymeric diphenylmethane diisocyanate (pMDI), the strength and modulus of the composites were further increased. However, the toughness was decreased due to the inhibition of the fiber pullout. An acoustic emission test revealed a significantly different process of structural change for the composites with/without pMDI during tension test.

Original languageEnglish (US)
Pages (from-to)572-577
Number of pages6
JournalIndustrial and Engineering Chemistry Research
Volume49
Issue number2
DOIs
Publication statusPublished - Jan 20 2010

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this