Fibers and Polymers

, Volume 10, Issue 1, pp 77–82 | Cite as

Nanocellulose reinforced PVA composite films: Effects of acid treatment and filler loading

  • Sun-Young Lee
  • D. Jagan Mohan
  • In-Aeh Kang
  • Geum-Hyun Doh
  • Soo Lee
  • Seong Ok Han
Article

Abstract

Nanocellulose was prepared by acid hydrolysis of microcrystalline cellulose (MCC) at different hydrobromic acid (HBr) concentrations. Polyvinyl alcohol (PVA) composite films were prepared by the reinforcement of nanocellulose into a PVA matrix at different filler loading levels and subsequent film casting. Chemical characterization of nanocelluloses was performed for the analysis of crystallinity (Xc), degree of polymerization (DP), and molecular weight (Mw). The mechanical and thermal properties of the nanocellulose reinforced PVA films were also measured for tensile strength and thermogravimetric analysis (TGA). The acid hydrolysis decreased steadily the DP and Mw of MCC. The crystallinity of MCC with 1.5 M and 2.5 M HBr showed a significant increase due to the degradation of amorphous domains in cellulose. Higher crystalline cellulose showed the higher thermal stability than MCC. From X-ray diffraction (XRD) analysis, nanocellulose samples showed the higher peak intensity than MCC cases. Reduction of MCC particle by acid hydrolysis was clearly observed from scanning electron microscope (SEM) images. The tensile and thermal properties of PVA composite films were significantly improved with the increase of the nanocellulose loading.

Keywords

Nanocellulose PVA Morphology Tensile property TGA 

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Copyright information

© The Korean Fiber Society and Springer-Verlag Berlin Heidelberg GmbH 2009

Authors and Affiliations

  • Sun-Young Lee
    • 3
  • D. Jagan Mohan
    • 3
  • In-Aeh Kang
    • 3
  • Geum-Hyun Doh
    • 3
  • Soo Lee
    • 1
    • 3
  • Seong Ok Han
    • 2
    • 3
  1. 1.Faculty of Chemical EngineeringChangwon National UniversityChangwonKorea
  2. 2.Nano Material Research CenterKorea Institute of Energy Research(KIER)DaejeonKorea
  3. 3.Division of Environmental Material Engineering, Department of Forest ProductsKorea Forest Research Institute(KFRI)SeoulKorea

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