6. Hydrolytic Degradation of Nanocomposite Fibers Electrospun from Poly(Lactic Acid)/Cellulose Nanocrystals

  1. Juan P. Hinestroza and
  2. Anil N. Netravali
  1. Chunhui Xiang1 and
  2. Margaret W. Frey2

Published Online: 21 MAR 2014

DOI: 10.1002/9783527649440.ch6

Cellulose Based Composites: Cellulose Based Composites

Cellulose Based Composites: Cellulose Based Composites

How to Cite

Xiang, C. and Frey, M. W. (2014) Hydrolytic Degradation of Nanocomposite Fibers Electrospun from Poly(Lactic Acid)/Cellulose Nanocrystals, in Cellulose Based Composites: Cellulose Based Composites (eds J. P. Hinestroza and A. N. Netravali), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, Germany. doi: 10.1002/9783527649440.ch6

Editor Information

  1. Cornell University, Department of Fiber Science & Apparel Design, 242 MVR Hall, 37 Forest Home Drive, Ithaca, NY 14853, USA

Author Information

  1. 1

    Iowa State University, Department of Apparel, Events and Hospitality Management, 1084B LeBaron Hall, Ames, Iowa 50011, USA

  2. 2

    Cornell University, Department of Fiber Science & Apparel Design, 299 MVR Hall, Ithaca, NY 14853, USA

Publication History

  1. Published Online: 21 MAR 2014
  2. Published Print: 17 MAR 2014

ISBN Information

Print ISBN: 9783527327195

Online ISBN: 9783527649440

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Keywords:

  • nanocomposite fibers;
  • hydrolytic degradation;
  • water contact angle;
  • water absorption;
  • chain scission reaction

Summary

The influence of cellulose nanocrystals on the hydrolytic degradation of electrospun poly(lactic acid) (PLA)/cellulose nanocomposite fibers was investigated. As the cellulose nanocrystal content increased, the electrospun nonwoven fabrics became increasingly hydrophilic. Hydrolytic degradation of the nanocomposite fibers was conducted in phosphate buffer saline (PBS, pH 7.4, 37 °C) with constant shaking. The electrospun PLA/cellulose nanocomposite fibers became rougher and swelled during hydrolytic degradation. The apparent degradation rates based on the molecular weight of PLA were calculated to be 0.0068, 0.0084, and 0.0128 LnM per week for the electrospun PLA/cellulose nanocomposite fibers spun from PLA solutions containing 0, 1, and 10% cellulose nanocrystals, respectively. A linear relationship between LnM and the degradation time suggests that the hydrolytic degradation of the electrospun PLA/cellulose nanocomposite fibers in PBS occurred via a random chain scission reaction. Polydispersity indices of PLA did not change significantly during hydrolytic degradation. The constant polydispersity indices of PLA further confirmed a random chain scission degradation mechanism. No autocatalytic degradation occurred during the hydrolytic degradation of electrospun PLA/cellulose nanocomposite fibers.