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| 膨胀石墨的制备及反应动力学探讨 | |
| 引用本文： | 庞秀言,封永强,张进国,王若云,李萍.膨胀石墨的制备及反应动力学探讨[J].河北大学学报(自然科学版),2006,26(6):619-624. |
| 作者姓名： | 庞秀言 封永强 张进国 王若云 李萍 |
| 作者单位： | 1. 河北大学,化学与环境科学学院,河北,保定,071002 2. 保定市联星碳化物有限公司,河北,保定,071000 3. 济南大学,化学化工学院,山东,济南,202700 |
| 基金项目： | 河北省教育厅博士基金资助项目(2004402)，河北大学博士基金资助项目 |
| 摘 要： | 研究了膨胀石墨制备中KMnO4,FeCl3及混酸的用量、混酸中H2SO4与HNO3比例、反应温度等因素对石墨膨胀容积的影响;根据L25(56)和L9(34)正交实验结果筛选出了获得最大膨胀容积实验方案:各原料质量比C∶FeCl3∶KMnO4∶混酸=1.0∶0.1∶1.0∶3.0,H2SO4与HNO3的质量比为2∶1;在15℃下反应30 min,900℃下获得最大膨胀容积240 mL/g.分别对原料石墨和制得的可膨胀石墨进行X_ray衍射扫描分析,证实了插层反应的存在及插层反应的不完全性;同时对膨胀容积受各种因素的影响结果从反应动力学角度进行了讨论. |
| 关 键 词： | 膨胀石墨 膨胀容积 正交实验 X-ray衍射 |
| 文章编号： | 1000-1565(2006)06-0619-06 |
| 修稿时间： | 2006年3月20日 |
Preparation of Expanded Graphite and the Discussion of Reaction Kinetics |
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| PANG Xiu-yan,FENG Yong-qiang,ZHANG Jin-guo,WANG Ruo-yun,LI Ping.Preparation of Expanded Graphite and the Discussion of Reaction Kinetics[J].Journal of Hebei University (Natural Science Edition),2006,26(6):619-624. | |
| Authors: | PANG Xiu-yan FENG Yong-qiang ZHANG Jin-guo WANG Ruo-yun LI Ping |
| Abstract: | Influence of various factors on expanded volume of expandable graphite was studied including the amount of KMnO-4,FeCl-3,mix-acid,reaction temperature and ratio of H-2SO-4 to HNO-3.Optimum preparation conditions were obtained according to the result of L-(25)(5~6) and L-9(3~4) experiment.Maximum expanded volume of 240 mL/g was obtained under the condition of 15 ℃,reaction 30 min,C∶FeCl-3∶KMnO-4∶mix-acid equal to 1.0∶0.1∶1.0∶3.0,and 2∶1 of H-2SO-4 to HNO-3(the ratio was calculated as mass ratio).X-ray analysis of graphite material and expandable graphite was carried out,and the results testified the creation of intercalation compound and its' inadequacy.Meanwhile,a kinetic discussion was carried out according to the influence of the above factors on expanded volume. |
| Keywords: | expanded graphite expanded volume orthogonal test X-ray diffraction |
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