Electrospinning of Continuous Nanofiber Bundles and Twisted Nanofiber Yarns

Ali, Usman; Zhou, Yaqiong; Wang, Xungai; Lin, Tao

doi:10.5772/25059

Cited by 27 publications

(34 citation statements)

References 80 publications

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“…The complex multiscale structure composing tendons and ligaments suggests researchers investigate different electrospinning setups for mimicking these kind of tissues as closely as possible [ 5 , 6 , 7 ]. Some of these setups, however, were applied in other research fields before being used for tissue engineering [ 9 , 132 , 133 , 134 ]. In this section, the most common setups and configurations are presented to produce electrospun nanofibers for tendon and ligament tissue regeneration.…”

Section: Equipment and Techniques To Produce Electrospun Scaffoldsmentioning

confidence: 99%

“…Electrospun nanofibers are generally collected as nonwoven or randomly arranged structures, due to the “whipping instability” of the electrospinning jet [ 133 ]. By electrospinning on a flat ground plate ( Figure 4 a) or on a drum collector rotating at low speed (peripheral speed lower than 8 m/s) ( Figure 4 b), it is possible to obtain mats made by nanofibers with a random configuration [ 132 , 133 , 134 ]. Early studies concerning fiber deposition and assembly focus on controlling the fibers’ alignment.…”

Section: Equipment and Techniques To Produce Electrospun Scaffoldsmentioning

confidence: 99%

“…Aligned nanofibers can be collected by using a dynamic mechanical collector such as a cylindrical drum [ 135 , 136 , 137 ]. When the collector rotates at a high peripheral speed, on the order of ≥8 m/s, fibers start to align circumferentially ( Figure 4 c) [ 133 ]. It is also possible to align nanofibers by using two split parallel flat plates, also called gap collectors, connected with grounded electrodes ( Figure 4 d) [ 136 , 137 , 138 , 139 , 140 , 141 , 142 , 143 , 144 , 145 , 146 ].…”

Section: Equipment and Techniques To Produce Electrospun Scaffoldsmentioning

confidence: 99%

“…It is also possible to align nanofibers by using two split parallel flat plates, also called gap collectors, connected with grounded electrodes ( Figure 4 d) [ 136 , 137 , 138 , 139 , 140 , 141 , 142 , 143 , 144 , 145 , 146 ]. This final collector setup guarantees a high alignment of the nanofibers but is very limited in the final length and thickness of the mat and fibers [ 9 , 132 , 133 , 134 ].…”

Section: Equipment and Techniques To Produce Electrospun Scaffoldsmentioning

confidence: 99%

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Biofabrication of Electrospun Scaffolds for the Regeneration of Tendons and Ligaments

2018

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Tendon and ligament tissue regeneration and replacement are complex since scaffolds need to guarantee an adequate hierarchical structured morphology, and non-linear mechanical properties. Moreover, to guide the cells’ proliferation and tissue re-growth, scaffolds must provide a fibrous texture mimicking the typical of the arrangement of the collagen in the extracellular matrix of these tissues. Among the different techniques to produce scaffolds, electrospinning is one of the most promising, thanks to its ability to produce fibers of nanometric size. This manuscript aims to provide an overview to researchers approaching the field of repair and regeneration of tendons and ligaments. To clarify the general requirements of electrospun scaffolds, the first part of this manuscript presents a general overview concerning tendons’ and ligaments’ structure and mechanical properties. The different types of polymers, blends and particles most frequently used for tendon and ligament tissue engineering are summarized. Furthermore, the focus of the review is on describing the different possible electrospinning setups and processes to obtain different nanofibrous structures, such as mats, bundles, yarns and more complex hierarchical assemblies. Finally, an overview concerning how these technologies are exploited to produce electrospun scaffolds for tendon and ligament tissue applications is reported together with the main findings and outcomes.

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Section: Equipment and Techniques To Produce Electrospun Scaffoldsmentioning

confidence: 99%

Section: Equipment and Techniques To Produce Electrospun Scaffoldsmentioning

confidence: 99%

Section: Equipment and Techniques To Produce Electrospun Scaffoldsmentioning

confidence: 99%

Section: Equipment and Techniques To Produce Electrospun Scaffoldsmentioning

confidence: 99%

See 2 more Smart Citations

Biofabrication of Electrospun Scaffolds for the Regeneration of Tendons and Ligaments

2018

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“…Directly depositing new-electrospun nanofibres into twisted, continuous nanofibre yarn without using liquid collector is highly promising (Ali, Zhou, Wang, & Lin, 2011;Shuakat & Lin, 2014). Recently, a few groups have reported the preparation of nanofibre yarns using a solid surface collector (Dabirian & Hosseini, 2009;Dabirian et al, 2007Dabirian et al, , 2011Hajiani et al, 2012).…”

Section: Introductionmentioning

confidence: 98%

Direct electrospinning of nanofibre yarns using a rotating ring collector

Shuakat

Lin

2015

The Journal of The Textile Institute

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Nanofibres prepared by electrospinning typically have randomly oriented fibrous structure. They have large surface-tovolume (or weight) ratio and excellent porous characteristic, which have shown enormous potential in diverse applications. However, electrospun nanofibres are often prepared in the form of randomly orientated fibrous web, which are fragile and difficult to be tailored in fibrous structures. Herein, we demonstrate a novel yarn electrospinning method which uses a rotating ring collector to convert newly electrospun nanofibres directly into a continuous yarn. The use of ring collector separates the yarn formation from the electrospinning zone. The deposition of later-spun nanofibres to the inner surface of fibrous cone eliminates hooked or curled nanofibres in the final yarn. The effects of polymer concentration and operating parameters on nanofibre and yarn morphology, diameter and the ring collector on yarn twist feature were examined. The nanofibre yarns had a surface twist angle up to 54.4°, and tensile strength as high as 93.6 MPa (elongation at break 242.6%). Increasing twist levels improves tensile strength and strain values.

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Nanofiber Bundles and Yarns Production by Electrospinning: A Review

Abbasipour

Khajavi

2013

Adv Polym Technol

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Electrospinning is a versatile method for spinning various polymers into nanoscale fibers. Nanofibers produced by electrospinning or other methods show enhanced properties such as high surface area to volume ratio, flexibility in surface functionalities, and mechanical properties. To increase their practical usage and opening new windows for their innovative applications, theses nanofibers can be assembled into an ordered structure like yarn. Besides their intrinsic‐based polymer characteristics, these nanofiber yarns have an exceptional high specific surface area as a heritage of their forming nanofibers. This unique property together with the increased number of fibers in an unit area of cross section will improve their some properties such as water and chemical absorbency and flexibility in comparison with conventional yarns. So far, miscellaneous methods are established for fabricating electrospun nanofibers into yarn and the effects of processing factors on the characteristics of produced nanofiber yarns are studied by many researchers. In this review, the achievements in nanofibers bundles and yarn production and different established methods including twisted, hybrid, and core types are discussed. It also reviews the reinforced yarns by carbon nanotubes and the mechanical properties of nanoyarns. © 2013 Wiley Periodicals, Inc. Adv Polym Technol 2013, 32, 21363; View this article online at wileyonlinelibrary.com. DOI 10.1002/adv.21363

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Electrospinning of Continuous Nanofiber Bundles and Twisted Nanofiber Yarns

Cited by 27 publications

References 80 publications

Biofabrication of Electrospun Scaffolds for the Regeneration of Tendons and Ligaments

Biofabrication of Electrospun Scaffolds for the Regeneration of Tendons and Ligaments

Direct electrospinning of nanofibre yarns using a rotating ring collector

Nanofiber Bundles and Yarns Production by Electrospinning: A Review

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