Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Polyvinyl Alcohol (PVA) Films Reinforced with Acid Hydrolyzed Cellulose

  • Lee, Sun-Young (Division of Environmental Material Engineering Department of Forest Products Korea Forest Research Institut) ;
  • Mohan, D.Jagan (Division of Environmental Material Engineering Department of Forest Products Korea Forest Research Institut) ;
  • Chun, Sang-Jin (Division of Environmental Material Engineering Department of Forest Products Korea Forest Research Institut) ;
  • Kang, In-Aeh (Division of Environmental Material Engineering Department of Forest Products Korea Forest Research Institut) ;
  • Lee, Soo (Department of Chemical Engineering, Changwon National University)
  • Published : 2008.09.30
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Abstract

Cellulose nanofibers from microfibril cellulose (MFC) was prepared by hydrobromic acid (HBr) treatment at different concentrations. Polyvinyl alcohol (PVA) composite films at various loading level of nanofibers were manufactured by a film casting method. The analysis of degree of polymerization (DP), crystallinity ($X_c$) and molecular weight ($M_w$) of cellulose after acid treatment was conducted. The mechanical and thermal properties of the cellulose nanofibers reinforced PVA films were characterized using tensile tests and thermogravimetric analysis (TGA). The DP and $M_w$ of MFC by HBr hydrolysis considerably decreased, but $X_c$ showed no significant change. After acid hydrolysis, the diameter of cellulose nanofibers was in the range of 100 to 200 nm. The thermal stability of the films was steadily improved with the increase of nanofiber loading. There was a significant increase in the tensile strength of PVA composite films with the increase in MFC loading. Finally, 5 wt.% nanofiber loading exhibited the highest tensile strength and thermal stability of PVA composite films.

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References

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