"Mechanical properties and in vitro degradation of electrospun bio-nano" by Qingfeng Shi, Chengjun Zhou et al.

Faculty Publications

Title

Mechanical properties and in vitro degradation of electrospun bio-nanocomposite mats from PLA and cellulose nanocrystals

Authors

Qingfeng Shi, School of Material Science & Engineering, East China University of Science & Technology, Shanghai 200237, China; School of Renewable Natural Resource, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA.
Chengjun Zhou, School of Renewable Natural Resource, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA.
Yiying Yue, School of Renewable Natural Resource, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA.
Weihong Guo, School of Material Science & Engineering, East China University of Science & Technology, Shanghai 200237, China.
Yiqiang Wu, College of Material Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.
Qinglin Wu, School of Renewable Natural Resource, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA.

Document Type

Article

Publication Date

9-1-2012

Abstract

Fibrous bio-nanocomposite mats consisting of cellulose nanocrystals (CNCs) and poly(lactic acid) (PLA) were electrospun from a solvent mixture consisting of N,N'-dimethylformamide and chloroform at room temperature. Morphological, mechanical and thermal properties, as well as in vitro degradation of nanocomposite mats were characterized as a function of material composition. Average diameter of the electrospun fibers decreased with increased CNC-loading level. Thermal stability, and tensile strength and modulus of nanocomposite mats were effectively improved by the addition of CNCs up to the 5 wt% level. The reinforcement of CNCs on electrospun mats was illustrated by the observation of SEM-based morphologies on the tensile fracturing process of nanocomposite mats. At the CNC content of 5 wt%, the maximum tensile stress and Young's modulus of the nanocomposite mats increased by 5 and 22 folds than those of neat PLA mats, respectively. Moreover, compared with neat PLA mats, the nanocomposite mats, especially at high CNC-loading levels, degraded more rapidly in phosphate-buffered saline solution.

Publication Source (Journal or Book title)

Carbohydrate polymers

First Page

301

Last Page

Recommended Citation

Shi, Q., Zhou, C., Yue, Y., Guo, W., Wu, Y., & Wu, Q. (2012). Mechanical properties and in vitro degradation of electrospun bio-nanocomposite mats from PLA and cellulose nanocrystals. Carbohydrate polymers, 90 (1), 301-8. https://doi.org/10.1016/j.carbpol.2012.05.042

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