Characterization on oxidative stabilization of polyacrylonitrile nanofibers prepared by electrospinning

Zhang, Wangxi; Wang, Yanzhi; Sun, Chunfeng

doi:10.1007/s10965-007-9130-x

Cited by 124 publications

(83 citation statements)

References 39 publications

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“…No campo de pesquisas relativo à eletrofiação de nanofibras poliméricas estas técnicas são rotineiramente empregadas para se avaliar o efeito do processamento nas propriedades do material como temperatura de transição vítrea e temperatura de inicio de degradação [53,[92][93][94] . Zong et al [53] compararam a temperatura de transição vítrea e cristalinidade de nanofibras de PLA obtidas por eletrofiação com amostras deste polímero sem qualquer tratamento através de análises de DSC.…”

Section: Outras Técnicasunclassified

Eletrofiação de polímeros em solução: parte II: aplicações e perspectivas

et al. 2012

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Aplicações Aplicações da eletrofiação no processamento de outros materiais a partir de precursores poliméricosA enorme gama de possibilidades abertas pelo processo de eletrofiação permite que diferentes aplicações sejam derivadas destes materiais, desde aplicações objetivas para o polímero em questão até outras, não tão usuais, como o processamento de precursores de outros materiais.Assim, uma das aplicações do processo de eletrofiação é a preparação de nanofibras cerâmicas através do tratamento térmico dos compósitos eletrofiados. Neste caso, a solução precursora contém obrigatoriamente um polímero, o material cerâmico e o solvente [2][3][4][5] . Com este objetivo, Li e Xia [3] prepararam nanofibras de TiO 2 anatase utilizando uma solução precursora contendo poli(vinilpirrolidona) (PVP), tetraisopropóxido de titânio e etanol. As mantas obtidas foram calcinadas em temperatura de 500 °C resultando em nanofibras de TiO 2 anatase com diâmetros na faixa de 20 a 200 nm. Azad [5] fabricou nanofibras transparentes de alumina (Al 2 O 3 ) utilizando uma solução precursora de 2,4 -pentanodionato de alumínio em acetona misturada com uma , o processo de eletrofiação foi discutido, incluindo suas bases teóricas e experimentais, e a obtenção de diferentes nanofibras de materiais poliméricos. Neste segundo artigo de revisão, são abordados os aspectos relacionados à aplicação de materiais eletrofiados em diferentes áreas, como médica, agrícola, sensores, processamento de outros materiais, entre outras. São também discutidas as técnicas de caracterização utilizadas mais frequentemente nestes materiais, e suas potencialidades. Esta segunda revisão é complementar à anterior e segue, em seus aspectos gerais, a mesma terminologia. Palavras-chave: Eletrofiação, nanocompósitos, catálise, sensores, blendas, microscopia, espalhamento de raio X. Electrospinning of Polymers in Solution. Part II: Applications and PerspectivesAbstract: In our previous review [1] , the process of electrospinning was discussed on the basis of theoretical and experimental aspects toward preparation of different polymeric nanofibers. In this second review, we focus on the aspects related to the application of electrospun materials in various fields such as medicine, agriculture, sensors, and processing of other materials. We discuss the most often characterization techniques used for these materials and their potential. This review complements the previous one and uses the same terminology.

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Section: Outras Técnicasunclassified

Eletrofiação de polímeros em solução: parte II: aplicações e perspectivas

et al. 2012

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“…Electrospun fibers, however, are often collected in the form of randomly oriented, nonwoven fabrics. 21,22 In the recent years electrospinning has been widely used to produce various polymer nanofibers mats functionalized with inorganic nanoparticles. Bai et al 23 have synthesized AgCl/PAN composite nanofibers by electrospinning method.…”

Section: Introductionmentioning

confidence: 99%

Studies on the synthesis of electrospun PAN‐Ag composite nanofibers for antibacterial application

Mahapatra

Garg

Nayak

et al. 2011

J of Applied Polymer Sci

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ABSTRACT:We have successfully synthesized polyacrylonitrile (PAN) nanofibers impregnated with Ag nanoparticles by electrospinning method at room temperature. Briefly, the PAN-Ag composite nanofibers were prepared by electrospinning PAN (10% w/v) in dimethyl formamide (DMF) solvent containing silver nitrate (AgNO 3 ) in the amounts of 8% by weight of PAN. The silver ions were reduced into silver particles in three different methods i.e., by refluxing the solution before electrospinning, treating with sodium borohydride (NaBH 4 ), as reducing agent, and heating the prepared composite nanofibers at 160 C. The prepared PAN nanofibers functionalized with Ag nanoparticles were characterized by field emission scanning electron microscopy (FESEM), SEM elemental detection X-ray analysis (SEM-EDAX), transmission electron microscopy (TEM), and ultraviolet-visible spectroscopy (UV-VIS) analytical techniques. UV-VIS spectra analysis showed distinct absorption band at 410 nm, suggesting the formation of Ag nanoparticles. TEM micrographs confirmed homogeneous dispersion of Ag nanoparticles on the surface of PAN nanofibers, and particle diameter was found to be 5-15 nm. It was found that all the three electrospun PAN-Ag composite nanofibers showed strong antibacterial activity toward both gram positive and gram negative bacteria. However, the antibacterial activity of PAN-Ag composite nanofibers membrane prepared by refluxed method was most prominent against S. aureus bacteria.

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“…2 are due to the vibrations of the S-C bonds of the PEDOT chains. 7,[17][18][19][20] With the presence of typical signals for both EDOT and PEDOT we could conclude that the chemical vapor polymerization of EDOT was achieved and that PEDOT was successfully coated on the surface of the PAN nanobers.…”

Section: Resultsmentioning

confidence: 89%

An amperometric glucose biosensor based on PEDOT nanofibers

Çetin

Çamurlu

2018

RSC Adv.

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Here we present a simple, low cost approach for the production of PEDOT nanofiber biosensors using simple techniques. Firstly, nanofibers of PEDOT were produced by the chemical vapor polymerization of EDOT on FeCl 3 containing electrospun PAN nanofiber mats. The nanofibers were characterized by SEM, FTIR, CV and conductivity studies, which indicated the formation of homogeneous, porous, electroactive PEDOT nanofibers. The fabrication of biosensors was achieved through the loading of various amounts of GOx on the nanofibers. To uncover their capability, the biosensors were operated under both hydrogen peroxide production and oxygen consumption conditions. For each biosensor current response versus glucose concentration calibration curves were plotted. The sensitivity, linear range, LOD, K m and I max values of the biosensors were determined and the stabilities of all the sensors were investigated. The biosensor operating at 0.6 V revealed a lower LOD with a wider linear range, higher stability, good sensitivity and selectivity. For example, the PEDOT-NFs/GOx-3 nanofiber biosensor showed good sensitivity (74.22 mA mM À1 cm À2 ) and LOD (2.9 mM) with a response time of 2-3 s without any interference effects. The PEDOT-NFs/GOx-2 biosensor operating at À0.6 V exhibited extreme sensitivity of 272.58 mA mM À1 cm À2. Our studies have shown that having good sensitivity, LOD and stability makes these interference-free, easy to construct sensors viable candidates for commercialization.

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Characterization on oxidative stabilization of polyacrylonitrile nanofibers prepared by electrospinning

Cited by 124 publications

References 39 publications

Eletrofiação de polímeros em solução: parte II: aplicações e perspectivas

Eletrofiação de polímeros em solução: parte II: aplicações e perspectivas

Studies on the synthesis of electrospun PAN‐Ag composite nanofibers for antibacterial application

An amperometric glucose biosensor based on PEDOT nanofibers

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