A Study on Effect of Oxidized Stabilization Process on The Physical Properties And The Microstructure of Polyacrylonitrile(PAN)-based Electrospinning Non-woven
| Autor: | TZONG-YIING CHIANG, 江宗穎 |
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| Rok vydání: | 2005 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 93 In this study we utilized an Electrospinner (ES) to produce precursor of PAN-based oxidized nanofibers non-woven fabrics from Polyacrylonitrile (PAN) fiber solution. The parameters of oxidized process used in this experiment chosen by the thermal analysis results of DSC and TGA were: oxidized temperature of 270, 300, and 330 ℃ and heating time of 30, 50, and 70 min, and three kinds of tension. The variation in yield rate, breaking strength, shrinkage and stiffness of PAN-based oxidized Electrospinning non-woven fabrics (ESNF) were examined in this article. The results indicated that the physical properties of ESNF were determined by oxidized conditions. In addition, the limit oxygen index (LOI) increased as these thermal conditions of temperature and time increased. As to the color-change of the oxidized ESNF, the black-colored ESNF showed the stabilized aromatic structure with higher Aromatization Index (AI). The experimental results showed that the optimum oxidized condition were 300℃ thermal temperature and 70 min heat time resulting in steady production and better properties of the PAN-based oxidized ESNF of 62% AI and 43 LOI, ultimately yielding a good precursor of after-finishing process of carbonization. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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