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研究生: 曾梓倫
Zih-Lun Zeng
論文名稱: 溫度與活化源對活性碳纖維之微細結構與化學性質之影響
A Study of the Effect of Temperature and Activator on the Chemical Properties and Microstructure of Activated Carbon Fabrics
指導教授: 蘇清淵
Ching-Iuan Su
口試委員: 楊銘乾
Ming-Chien Yang
王英靖
Ying-Jing Wang
學位類別: 碩士
Master
系所名稱: 工程學院 - 材料科學與工程系
Department of Materials Science and Engineering
論文出版年: 2009
畢業學年度: 97
語文別: 中文
論文頁數: 127
中文關鍵詞: 嫘縈系活性碳纖維布比表面積
外文關鍵詞: viscose rayon-based, activated carbon fiber, BET
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  • 本研究以嫘縈(Viscose Rayon) 針織物為原料,經95%的硫酸銨(AS)及5%磷酸氫二銨(AP),濃度為30%之複合式耐燃劑前處理後,做為前驅體(Precursor)。利用一連續之直立式半開放高溫爐,經過氧化、碳化及活化工程,製作活性碳纖維布。實驗中利用不同碳化溫度600℃、700℃、800℃、900℃及1000℃,並改變活化源,來探討活性碳纖維布的微細結構與化學性質。
    當碳化溫度越高,產率下降,而真密度與結晶厚度越大,其導電度亦隨之增加。當加入水與空氣為活化源時,比表面積增加,有機氣體吸附率上升。
    結果顯示,所製備出的活性碳纖維以微孔結構為主,在水蒸氣加空氣當活化源所製備出之活性碳纖維,其比表面積達1411.6 m²/g,而其結構較緻密,結晶厚度為3.84,真實密度值2.59 g/cm³,對四氯化碳氣體吸附量為97.5%。


    This study used viscose rayon-based knitted fabrics as raw materials and pretreated with composite flame retardant concentration of 30% of 95% AS and 5% AP to prepare the precursor. This nonstop vertical row semi-open high temperature furnace was employed to produce activated carbon fiber cloth after oxidation, carbonization, and activation. During the experiment, the micro structure and chemical properties of the activated carbon fiber cloth were explored and discussed by using different carbonization temperatures at 600℃, 700℃, 800℃, 900℃ and 1000℃ and changing activation sources.
    When the carbonization temperature becomes higher, the production rate drops while the true density and crystallization thickness become greater with increasing electrical conductivity. When water or air was added as the source of activation, the specific surface area increased and the absorption rate of organic gases also rose.
    The results showed that the produced activated carbon fiber was mainly of micro-porous structure. The activated carbon fiber prepared by using water vapor and air as the activation source had a specific surface area up to 1411.6 m²/g, and its structure was relatively dense with crystallization thickness at 3.84. The true density value was 2.59 g/cm³, and absorption rate of carbon tetrachloride was 97.5%.

    目錄 摘要 I Abstract II 致謝 III 目錄 IV 圖目錄 VI 表目錄 IX 第一章 緒論 1 1.1 前言 1 1.2 活性碳與活性碳纖維之發展 2 1.3 活性碳與活性碳纖維之功能性差異 4 1.4 研究動機及目的 8 第二章 文獻回顧與基本理論 9 2.1 嫘縈系原料 9 2.2 原布整備 11 2.3 前處理工程 12 2.3.1 燃燒理論 12 2.3.2 耐燃理論 13 2.3.3 耐燃劑耐燃理論 14 2.3.4 耐燃劑之作用 15 2.3.5 磷化物的防燃理論 17 2.3.6 硫酸鹽耐燃理論 18 2.4 熱處理工程 18 2.4.1 氧化工程 19 2.4.2 碳化工程 22 2.4.3 芳香化過程 23 2.4.4 活化工程 25 2.4.4.1 化學活化與物理活化 25 2.5 活性碳孔洞之形成及其微細結構 29 2.5.1 孔洞結構的形成 29 2.5.2 碳纖維吸附材之微細構造 34 2.6 活性碳之表面化學構造 37 2.7 吸附理論 39 2.7.1 物理吸附 40 2.7.2 化學吸附 40 2.7.3 交換吸附 43 2.7.4 吸附機構 43 2.8 孔洞分析及理論 46 2.8.1 等溫吸附曲線 47 2.8.2 遲滯圈 50 2.8.3 藍牟爾吸附理論 52 2.8.4 BET等溫吸附 55 2.9 真實密度測試 57 第三章 實驗 59 3.1 實驗材料 59 3.1.1 實驗基材 59 3.1.2 實驗藥品 59 3.1.3 實驗氣體 60 3.2 實驗設備 61 3.3 測試儀器 64 3.4 實驗流程 65 3.5 實驗方法 66 3.5.1 原布整備 66 3.5.2 前處理工程 66 3.5.3 氧化、碳化及活化工程 67 3.5.4 後處理工程 69 3.6 基本物性測試 70 3.6.1 產率 70 3.6.2 拉伸強度 70 3.6.3 挺性試驗 72 3.6.4 pH值 73 3.6.5 真實密度測試 73 3.6.6 表面形態觀察 74 3.6.7 比表面積及孔洞性質分析 74 3.7 活性碳纖維布在水中殘留物質測試 75 3.8 有機氣體吸附 76 3.9 化學性質分析 77 3.9.1 X射線繞射分析 77 3.9.2 元素分析儀 77 3.10 表面電性質 78 第四章 結果與討論 79 4.1 活性碳纖維之基本物性 80 4.1.1 產率 80 4.1.2 拉伸強度 81 4.1.3 抗彎剛性 82 4.2 活性碳纖維在水中之殘留物質測試 83 4.2.1 活性碳纖維pH值測試 83 4.2.2 活性碳纖維在水中之離子殘留物測試 84 4.3 微細構造分析 86 4.4 元素分析 88 4.5 氮氣等溫吸附 90 4.6 BET比表面積與孔洞性質分析 92 4.7 孔徑分析 95 4.8 真實密度分析 96 4.9 SEM微結構及表面形態觀察 98 4.10 氣相吸附 104 第五章 結論 108 參考文獻 110

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