本研究採用聚丙烯腈為原料，利用靜電紡絲機製造奈米纖維布，以差式掃描熱量分析儀(DSC)與熱重量分析儀(TGA)熱分析結果，選取氧化條件參數，分別設定溫度為270、300與330℃三種，加熱時間為30、50、70 min與在有、無張力下進行氧化工程，探討不同的氧化條件，對聚丙烯腈系電紡布表觀與微細構造的影響。實驗結果得知，經氧化穩定加工後，電紡布隨氧化的溫度、時間與張力之增加，其強度與產率有逐漸下降的趨勢。織物重量損失率與收縮率隨著張力之增加，氧化溫度的提高，以及加熱時間的增長，亦隨之增大。氧化布之柔軟度隨氧化溫度的增高與時間的增長，而隨之降低，亦即挺硬度增大。且氧指數(LOI) 隨著氧化時間及溫度的提高而增加。氧化織物之顏色變化，在熱處理溫度300℃，加熱70分鐘時，呈現之黑色表觀，具有較穩定的結構，且環化指數值達62\%，經由SEM觀察，為均齊的非織物形態，當氧化溫度達到330℃，70 min時，氧化布產生脆化現象。綜合以上分析，氧化溫度在300℃，加熱時間為70min時，其環化已達氧化完全程度，且氧指數(LOI)值達43，顯示其為不燃纖維，而其他物性亦適合於後道加工之處理，此為本研究之最佳氧化處理條件。

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.

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