Online stretching of directly electrospun nanofiber yarns

Ali, Usman, Niu, Haitao, Abbas, Amir, Shao, Hao and Lin, Tong 2016, Online stretching of directly electrospun nanofiber yarns, RSC advances, vol. 6, no. 36, pp. 30564-30569, doi: 10.1039/c6ra01856d.

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Title Online stretching of directly electrospun nanofiber yarns
Author(s) Ali, Usman
Niu, HaitaoORCID iD for Niu, Haitao
Abbas, Amir
Shao, HaoORCID iD for Shao, Hao
Lin, TongORCID iD for Lin, Tong
Journal name RSC advances
Volume number 6
Issue number 36
Start page 30564
End page 30569
Total pages 6
Publisher Royal Society of Chemistry
Place of publication Cambridge, Eng.
Publication date 2016
ISSN 2046-2069
Keyword(s) Science & Technology
Physical Sciences
Chemistry, Multidisciplinary
Summary Nanofiber yarns are important building blocks for making three-dimensional nanostructures, e.g. through a knitting or weaving process, with better mechanical properties than nanofiber nonwovens and well-controlled fibrous construction. However, it still remains challenging to produce quality nanofiber yarns in a sufficient rate. In this study, we have proven that online stretching during electrospinning of nanofiber yarns can considerably improve fiber alignment and molecular orientation within the yarn and increase yarn tensile strength, but reduce fiber/yarn diameters. By compensating twist during online stretching, the device can prepare nanofiber yarns with different stretch levels, but maintaining the same twist multiplier. This allows us to examine the effect of stretching on fiber and yarn morphology. It was interesting to find that on increasing the stretching ratio from 0% to 95%, the yarn diameter reduced from 135.1 ± 20.3 μm to 46.2 ± 10.2 μm, and the fiber diameter reduced from 998 ± 141 nm to 631 ± 98 nm, whereas the yarn tensile strength increased from 48.2 ± 5.6 MPa to 127.7 ± 5.4 MPa. Such an advanced yarn electrospinning technique can produce nanofiber yarn with an overall yarn production rate as high as 10 m min−1. This may be useful for production of nanofiber yarns for various applications.
Language eng
DOI 10.1039/c6ra01856d
Field of Research 091209 Polymers and Plastics
091205 Functional Materials
Socio Economic Objective 860403 Natural Fibres
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Royal Society of Chemistry
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Document type: Journal Article
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