改进水性中间相沥青的制备
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摘要
以针状焦为原料,通过低温—高温分步混酸氧化法改进制备水性中间相沥青(AMP),对AMP的产率和氧化条件之间的关系进行了研究。利用热重分析仪、红外光谱仪、动态光散射粒度仪和透射电镜等对不同氧化条件下得到的AMP碳收率、粒度及其微晶结构进行研究。结果表明:改进法制备的AMP最高产率达150%左右,通过引入低温插层效应能够将AMP的溶胶粒径尺寸减小至3.1 nm。
Preparation of aqueous mesophase pitch(AMP) was improved by mixed acid oxidizing green needle coke at low-high temperature in sequence. The relationship between the yield of AMP and the oxidation conditions was studied. The carbon yield, particle size and microcrystalline structure of AMP were studied by thermogravimetry, infrared, dynamic light scattering and transmission electron microscope. Results indicate that the highest yield of AMP prepared by the improved method is about 150%. By introducing a low temperature intercalation effect, the sol particle size of AMP can be reduced to 3.1 nm.
Preparation of aqueous mesophase pitch(AMP) was improved by mixed acid oxidizing green needle coke at low-high temperature in sequence. The relationship between the yield of AMP and the oxidation conditions was studied. The carbon yield, particle size and microcrystalline structure of AMP were studied by thermogravimetry, infrared, dynamic light scattering and transmission electron microscope. Results indicate that the highest yield of AMP prepared by the improved method is about 150%. By introducing a low temperature intercalation effect, the sol particle size of AMP can be reduced to 3.1 nm.
引文
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[2]孟秀英.纳米炭粉的制备及结构性能的表征[D].大连:大连理工大学,2006.
[3]程有亮,李铁虎,李凤娟,等.沥青基纳米球状炭的制备与表征[J].煤炭学报,2010(3):490-493.
[4]ANTOLINI E.Carbon supports for low-temperature fuel cell catalysts[J].Applied Catalysis B:Environmental,2009,88(1):1-24.
[5]程有亮,李铁虎.溶胶-凝胶法介孔沥青炭微球的制备及电化学性能研究[J].炭素技术,2013(2):1-5.
[6]施啸奔.沥青包覆人造石墨用作锂离子电池负极材料的研究[D].天津:天津大学,2009.
[7]王九洲.水溶性炭质中间体的制备及其在电化学领域的应用研究[D].天津:天津大学,2012.
[8]LI X K,LIU L,SHEN S D.Structure of ultrafine carbon powders prepared using a carbonaceous gel[J].Carbon,2001,39(9):1431-1433.
[9]TATEISHI D,ESUMI K,HONDA H,et al.Preparation of carbonaceous gel beads[J].Carbon,1992,30(6):942-944.
[10]武征男,孙祝林,罗含,等.水性中间相沥青溶液的可纺性研究[J].合成纤维,2018,47(6):17-22.
[11]李元祥.日本针状焦性能研究[J].炭素技术,1993(4):7-12.
[12]HUMMERS W S,OFFEMAN R E.Preparation of graphitic oxide[J].JAm Chem Soc,1958,80:1339.