本研究以聚丙烯腈為原料，利用靜電紡絲法（Electro-spinning）製作奈米纖維不織布，探討其碳化、活化後的孔洞性質，本實驗利用箱型式高溫爐製成氧化纖維布為前驅體，再利用直立連續半開放式高溫爐，通以水蒸氣為活化源，經碳化、活化加工，製作出碳奈米纖維吸附材；實驗中藉由不同的加工條件，包括三種喂布速率（10 cm/min、20 cm/min、30 cm/min）及四種活化源供給量（80 ml/min、120 ml/min、160 ml/min），以製備出各種條件的碳奈米纖維吸附材。由氮氣等溫吸附測試得知，當喂布速率越慢時，氮氣等溫吸附曲線愈高，遲滯圈現象愈明顯。
實驗樣品的孔洞大多以微孔和中孔為主，平均孔洞在20Å以下，在BJH分析法中，測得中孔孔徑分佈在20Å到50Å之間居多，隨著喂布速率放慢，碳奈米纖維吸附材的孔洞體積也隨著增大；由有機氣體吸附試驗得知，碳奈米纖維吸附材隨著比表面積和孔洞體積的增加，樣品對四氯化碳的吸附能力越好。
實驗結果顯示，碳奈米纖維吸附材的產率隨著喂布速率放慢而減少，當喂布速率為10 cm/min、活化源120 ml/min時其比表面積可達1114(m2/g)。

This study examines the pore characteristics of carbon nanofiber adsorbents prepared from polyacrylonitrile (PAN) by electro-spinning. Oxidized PAN fiber is used as the precursor to produce carbon nanofiber adsorbents in a continuous semi-open high-temperature furnace through carbonization and activation with steam. Different production rate (10, 20 and 30 cm/min) and different flow rate of steam activator (80, 120 and 160 ml/min) are used to produce carbon nanofiber adsorbents with different adsorption properties. Experimental results show that the slower the production rate, the higher the adsorption isotherms of nitrogen at 77k and the more prominent the hysterisis loop. Moreover, slower production rate results in less carbon nanofiber absorbents produced. At production rate of 10 cm/min and steam activator flow rate of 120 ml/min, the BET specific surface area can reach 1114 m2/g.

Examining the microstructure of carbon nanofiber absorbents reveals that they contain mainly micropores and mesopores with mean radius below 20Å. BJH analysis also shows that the mean radius of mesopores range between 20Å and 50Å. It is also found that the total pore volume in carbon nanofiber absorbents increases with decreasing production rate. In addition, carbon nanofiber absorbent with higher total pore volume and BET specific surface area has better adsorption of CCL4.

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