Campus Units

Mechanical Engineering, Biomedical Sciences, Ames Laboratory, Bioeconomy Institute (BEI), Center for Advanced Host Defenses, Immunobiotics and Translational Comparative Medicine

Document Type

Article

Publication Version

Published Version

Publication Date

2016

Journal or Book Title

RSC Advances

Volume

6

Issue

60

First Page

55343

Last Page

55353

DOI

10.1039/C6RA09519D

Abstract

A microfluidic platform was used to fabricate continuous and non-rounded polyvinyl alcohol (PVA) microfibers. We showed that the size and cross-section of the PVA fibers can be controlled by changing the PVA concentration in dimethyl sulfoxide (DMSO) and flow rate ratio between the core and sheath fluids. The PVA concentration was varied from 6% to 12%, and the sheath-to-core flow rate ratio used for this study was in the range of 500:5 to 500:20. The aspect ratio of the fibers became larger when the PVA concentration increased and the flow rate ratio decreased. Additionally, we simulated the microfluidic fiber fabrication process and the results were consistent with the experimental results. The dissolution of the PVA fibers fabricated with different characteristics was also studied. It was shown that increasing the PVA concentration and decreasing the flow rate ratio increased the dissolution time of the fibers in DI water. A tensile test was conducted to obtain the stress–strain curves for different types of fibers. The results showed that a wide range of mechanical properties can be achieved by changing the PVA concentration and the flow rate ratio. The increase of PVA concentration from 6% to 12% enhanced the tensile stress at break and Young's modulus by a factor of 4.9 and 2.02, respectively. The mechanical strength of the fibers was shown to drop when the flow rate ratio decreased.

Comments

This article is published as Sharifi, Farrokh, Zhenhua Bai, Reza Montazami, and Nastaran Hashemi. "Mechanical and physical properties of poly (vinyl alcohol) microfibers fabricated by a microfluidic approach." RSC Advances 6, no. 60 (2016): 55343-55353. doi: 10.1039/C6RA09519D. Posted with permission.

Copyright Owner

The Royal Society of Chemistry

Language

en

File Format

application/pdf

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