| Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences | Host |
| Citation: |
PENG Chenglong, HUANG Jing, SHEN Yi, LI Yunguo, ZHANG Jidan, LIU Xueqin, WANG Yang, LI Zhen. Discussion on the Mechanism of the Influence of Graphite Scale Size on Expansion Volume[J]. Conservation and Utilization of Mineral Resources, 2018, (5): 62-66. doi: 10.13779/j.cnki.issn1001-0076.2018.05.008
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Discussion on the Mechanism of the Influence of Graphite Scale Size on Expansion Volume
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Abstract
Few research has been carried out on the influence rules and mechanism of graphite scale size on expanded volume. In this paper, different scale graphite was selected and expanded under the same process conditions. The structure and morphology of graphite concentrate, interlayer compound and expanded graphite were characterized by XRD and SEM, and the reaction kinetics model and expanded graphite packing model were established. The results showed that the larger the graphite scale, the higher the expanded volume of expanded graphite. Microscopically, pyrolysis of graphite intercalation compounds produces a gas that acts on large scale flake graphite for a long time, resulting in a large interlayer spacing; Macroscopically, the expanded volume is different due to different packing methods of expanded graphite.
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References
[1] Gu Wentian, Zhang Wei, Li Xinming, et al. Graphene sheets from worm-like exfoliated graphite[J]. Journal of materials chemistry, 2009, 19(21):3367-3369. doi: 10.1039/b904093p [2] Wang Peng, Zhang Jiajia, Dong Lei, et al. Interlayer polymerization in chemically expanded graphite for preparation of highly conductive, mechanically strong polymer composites[J]. Chemistry of materials, 2017, 29(8):3412-3422. doi: 10.1021/acs.chemmater.6b04734 [3] 李珍, 杨剑波, 刘学琴, 等.石墨烯的制备及其在光催化材料中的应用[J].矿产保护与利用, 2017(3):84-89. [4] 吴雪艳.超大体积可膨胀石墨的制备及其催化性能的研究[D].石家庄: 河北师范大学, 2005. http://cdmd.cnki.com.cn/article/cdmd-10094-2005103988.htm [5] 田占军, 岳学庆, 张瑞军, 等.影响膨胀石墨膨胀容积因素的研究[J].中国材料科技与设备, 2006(3):86-88. [6] 伏渭娜, 施翔宇, 王付同, 等.无硫膨胀石墨的制备及吸油性能[J].环境工程学报, 2012, 6(5):1518-1524. [7] 吕广超, 冯晓彤, 周国江, 等.以高氯酸和磷酸为插层剂制备无硫可膨胀石墨的研究[J].黑龙江科学, 2015, 6(5):18-19, 25. doi: 10.3969/j.issn.1674-8646.2015.05.007 [8] Olsen L C, Seeman S E, Scott H W. Expanded pyrolytic graphite structural and transport properties[J]. Carbon, 1970, 8(1):85-93. doi: 10.1016/0008-6223(70)90131-4 [9] Anderson S H, Chung D D L. Exfoliation of intercalated graphite[J]. Carbon, 1984, 22(3):253-263. doi: 10.1016/0008-6223(84)90169-6 [10] Kamada K, Higashida Y. Mechanism of flaking in pyrolytic graphite on ion bombardments-ii. numerical discussions in relation to the flaking[J]. Journal of nuclear materials, 1978, 73(1):41-49. doi: 10.1016/0022-3115(78)90477-4 [11] Peng Tiefeng, Liu Bin, Cao Xuechao, et al. Preparation, quantitative surface analysis, intercalation characteristics and industrial implications of low temperature expandable graphite[J]. Applied surface science, 2018, 444:800-810. doi: 10.1016/j.apsusc.2018.03.089 -
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PENG Chenglong, HUANG Jing, SHEN Yi, LI Yunguo, ZHANG Jidan, LIU Xueqin, WANG Yang, LI Zhen. Discussion on the Mechanism of the Influence of Graphite Scale Size on Expansion Volume[J]. Conservation and Utilization of Mineral Resources, 2018, (5): 62-66. doi: 10.13779/j.cnki.issn1001-0076.2018.05.008
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Figure 1.
The process flow charts of the expanded graphite
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Figure 2.
Graph of the relationship between the size of flake and the expanded volume of graphite
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Figure 3.
XRD patterns of graphite concentrate, graphite intercalation compounds and expanded graphite for -200 and 100~200 mesh
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Figure 4.
SEM images of flake graphite, GICs and EG
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Figure 5.
Graphite expansion diagram and its EG integral model
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Figure 6.
Macrostructural model of EG