Application of direct tracking method for measuring electrospun nanofiber diameter

Ziabari, Mohammad; Mottaghitalab, Vahid; Haghi, A. K.

doi:10.1590/s0104-66322009000100006

Cited by 45 publications

(28 citation statements)

References 22 publications

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“…The average diameter of nanofibers increases with increasing polymer concentration because of lower extension of the jet at higher concentration and viscosity. Based on SEM images, the average diameter of nanofibers produced from 13 wt% polymer solutions is about 323 ± 31 nm, which is about 100 nm less than the diameter of those fibers collected from 15 wt% polymer solution (Ziabari et al, 2009). This is probably due to the greater stretching resistance of the solution with increasing solid content (Ramakrishna et al, 2005).…”

Section: Resultsmentioning

confidence: 87%

Development and characterization of highly oriented PAN nanofiber

Sadrjahani

Hoseini

Mottaghitalab

et al. 2010

Braz. J. Chem. Eng.

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-A simple and non-conventional electrospinning technique was employed for producing highly oriented Polyacrylonitrile (PAN) nanofibers. The PAN nanofibers were electrospun from 14 wt% solution of PAN in dimethylformamid (DMF) at 11 kv on a rotating drum with various linear speeds from 22.5 m/min to 67.7 m/min. The influence of take up velocity was investigated on the degree of alignment, internal structure and mechanical properties of collected PAN nanofibers. Using an image processing technique, the best degree of alignment was obtained for those nanofibers collected at a take up velocity of 59.5 m/min. Moreover, Raman spectroscopy was used for measuring molecular orientation of PAN nanofibers. Similarly, a maximum chain orientation parameter of 0.25 was determined for nanofibers collected at a take up velocity of 59.5 m/min.

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Section: Resultsmentioning

confidence: 87%

Development and characterization of highly oriented PAN nanofiber

Sadrjahani

Hoseini

Mottaghitalab

et al. 2010

Braz. J. Chem. Eng.

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“…A feszültség rákapcsolásával szálakra szakadt, ezek a gyűjtőfelülethez vonzódtak. Az elektromos erők több ezerszeres mértékben nyújtják meg a szálakat, amelyek így a textilszálaknál egy-két nagyságrenddel vé-konyabbak lesznek [11], emiatt a felület-tömeg arány nagy lesz. Végül az oldószer elpárolog, és a szálak megszilárdulnak.…”

Section: Az Electrospinning Folyamataunclassified

Új, laparoszkópos beültetésre alkalmas sérvháló állatkísérletes vizsgálata

Guba

2016

Orvosi Hetilap

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Bevezetés: A hálóval történő hasfal-rekonstrukció a sebészetben széles körben alkalmazott eljárás. A nem felszívódó hálók azonban számos komplikációt okozhatnak. Célkitűzés: Felszívódó, polimeralapú háló készítése, amely megfelelő kémiai, mechanikai és biológiai tulajdonságokkal rendelkezik. Módszer: A szerző háromdimenziós biokompatibilis, polivinil-alkoholból, reaktív electrospinninggel készült hálót használt. A toxicitási és sejt-háló kölcsönhatási vizsgála-tok humán tüdőcarcinoma epithelialis sejteken (A-549), az in vivo vizsgálatok pedig 42 hím Wistar patkányon tör-téntek a posztoperatív 1-5., 7. és 14. napon (3 patkány/csoport). Eredmények: Az in vitro kísérletekben a polivinilalkohol biokompatibilisnek bizonyult, az in vivo kísérletekben a belőle készült háló vizsgálata során a hálóval összefüggésbe hozható major komplikáció nem fordult elő. Következtetések: Megállapítható, hogy ez a polimerháló szövetbarát, a környező szöveteket nem károsítja, azokkal jól integrálódik. Orv. Hetil., 2016, 157(5), 180-184. Kulcsszavak: hasfali sérv, sebészeti háló, polivinil-alkohol A novel surgical mesh suitable for laparoscopy studied on animal modelIntroduction: Reconstruction of the abdominal wall with mesh is a widely used surgical procedure. The non-absorbable meshes tend to cause numerous side-effects. Aim: The aim of the author was to produce an absorbable, polymerbased mesh that possesses appropriate chemical, mechanical and biological properties. Method: A three-dimensional, biocompatible mesh was produced from poly-vinyl-alcohol using reactive electrospinning. Toxicity and cell-mesh interactions were tested using human lung carcinoma epithelial cells (A-549), and in vivo tests were conducted in 42 male Wistar rats at the 1-5, 7 and 14 postoperative days (3 rats/groups). Results: In the in vitro tests poly-vinyl-alcohol was biocompatible. In the in vivo tests no major complication was associated with the mesh made of poly-vinylalcohol. Conclusions: The author concludes that this polymer mesh is biocompatible, it does not damage the surrounding tissues and integrates well with them.

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“…Fiber uniformity is one of the Nano fiber properties which were investigated by Chhabra et al [19]. In study by Ziabari et al [20], direct tracking method to measure the Nano fiber diameter was used. Also, this study applied local thresholding method to threshold Nano fiber images.…”

Section: Fig 1: Micrographs Of the Electrospun Nano Fiber Websmentioning

confidence: 99%

Nano Fiber Images Thresholding based on Imperial Competitive Algorithm

Dehghan¹,

Payvandy²,

Tavanaei³

2014

IJCA

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Nano fibers are widely used in various industries, therefor knowing the morphology is important. Thresholding is a simple but effective technique for image segmentation. The goal of image segmentation is to cluster pixels into salient image regions, i.e., regions corresponding to individual surfaces, objects, or natural parts of objects. In this paper a novel method is proposed for performing image segmentation. The purpose of this paper proposed an imperial competitive algorithm with the objective function from Kmeans clustering algorithm for Nano fibers image thresholding. Then algorithm used, with the algorithms such as: global threshold, local threshold, Kmeans clustering algorithm and FCM methods were compared. Finally, a powerful algorithm for image thresholding is found. The comparisons and experimental results show that purposed algorithm is better than other methods particularly global and local thresholding, Kmeans and even FCM. General TermsHeuristic Algorithm, Thresholding Method.

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Application of direct tracking method for measuring electrospun nanofiber diameter

Cited by 45 publications

References 22 publications

Development and characterization of highly oriented PAN nanofiber

Development and characterization of highly oriented PAN nanofiber

Új, laparoszkópos beültetésre alkalmas sérvháló állatkísérletes vizsgálata

Nano Fiber Images Thresholding based on Imperial Competitive Algorithm

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