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首页> 外文期刊>Journal of Macromolecular Science, Part B: Physics >Effects of Stabilization Temperature on Structures and Properties of Polyacrylonitrile (PAN)-Based Stabilized Electrospun Nanofiber Mats
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Effects of Stabilization Temperature on Structures and Properties of Polyacrylonitrile (PAN)-Based Stabilized Electrospun Nanofiber Mats

机译：稳定温度对聚丙烯腈基稳定电纺纳米纤维毡结构和性能的影响

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An improved heat treatment strategy for electrospun polyacrylonitrile (PAN)-based nanofiber mats is developed. Polyacrylonitrile nanofiber mats were fabricated by electrospining and then were stabilized at different temperatures. Scanning electron microscopy (SEM), differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and mechanical testing were used to study the effects of temperature (for times of 1 h) on the structures and properties of PAN-based heat stabilized electrospun nanofiber mats. Results showed that at temperature below 250°C, the structure conversion of PAN nanofibers was not obvious. However, when the stabilization temperature was above 260°C, PAN nanofibers became thermally stable and the aromatization indices increased rapidly to 55.8%, which is preferable for stabilized PAN nanofiber mats. After thermal treatment up to 270°C, most of the C≡N groups in PAN macromolecules change to C˭N groups, implying that the cycling reaction was almost complete at 270°C. The tensile strength of the nanofiber mats revealed that for the highest mechanical properties of the nanofiber mats, the stabilization temperature should be around 260°C.View full textDownload full textKeywordsFTIR, mechanical properties, nanofiber mats, Polyacrylonitrile (PAN), stabilization, thermal propertiesRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/00222348.2012.676415
机译：开发了一种改进的静电纺聚丙烯腈（PAN）纳米纤维毡的热处理策略。聚丙烯腈纳米纤维垫通过静电纺丝制成，然后在不同温度下稳定。使用扫描电子显微镜（SEM），差示扫描量热法（DSC），傅里叶变换红外光谱（FTIR），热重分析（TGA），X射线衍射（XRD）和机械测试来研究温度的影响1 h）对基于PAN的热稳定电纺纳米纤维垫的结构和性能。结果表明，在低于250°C的温度下，PAN纳米纤维的结构转化并不明显。但是，当稳定温度高于260°C时，PAN纳米纤维变得热稳定，并且芳构化指数迅速增加至55.8％，这对于稳定的PAN纳米纤维垫来说是优选的。热处理到270°C之后，PAN大分子中的大多数C组均变为CËN组，这表明循环反应在270°C时几乎完成。纳米纤维垫的抗张强度表明，要获得纳米纤维垫的最高机械性能，稳定温度应在260°C左右。 var addthis_config = {ui_cobrand：“泰勒和弗朗西斯在线”，servicescompact：“ citeulike，netvibes，twitter，technorati，delicious，linkedin，facebook，stumbleupon，digg，google，更多”，发布号：“ ra-4dff56cd6bb1830b”}；添加到候选列表链接永久链接http://dx.doi.org/10.1080/00222348.2012.676415

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