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Tailoring crystallinity of electrospun Plla fibres by control of electrospinning parameters

Ero-Phillips, Olubayode and Jenkins, Mike and Stamboulis, Artemis (2012) Tailoring crystallinity of electrospun Plla fibres by control of electrospinning parameters. Polymers, 4 (3). pp. 1331-1348. ISSN 2073-4360

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URL of Published Version: http://dx.doi.org/10.3390/polym4031331

Identification Number/DOI: doi:10.3390/polym4031331

Poly(L-lactic acid) (PLLA) fibers were fabricated by electrospinning. The effects of various electrospinning process parameters on the thermal properties, especially the crystallinity of the electrospun fibers were investigated. Thermal analysis of the fibers revealed that they exhibited degree of crystallinity ranging from 23% to 46% while that for the as-received granules was approximately 37%, suggesting that the crystallinity of electrospun PLLA fibres can be controlled by optimizing the electrospinning process. This finding is very important because crystallinity affects polymer properties such as degradation, stiffness,yield stress, modulus and tensile strength, solubility, optical and electrical properties which will in turn affect the behavior of these materials when they are utilized in energy,environment, defense and security applications. The results presented in this paper show that the degree of crystallinity of the electrospun fibers decreased with increasing the polymer solution concentration. Furthermore, an optimum electrospinning voltage at which maximum degree of crystallinity can be obtained was observed. At voltages higher or lower than the optimum electrospinning voltage, the degree of rystallinity will decrease or increase,respectively. The effect of the needle tip to collector distance (NTCD) on the degree of
crystallinity follows no predictable and consistent pattern.

Type of Work:Article
Date:28 June 2012 (Publication)
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Department:School of Metallurgy & Materials
Subjects:Q Science (General)
TN Mining engineering. Metallurgy
Institution:University of Birmingham
Copyright Holders:MDPI AG, Basel, Switzerland
ID Code:1257
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