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热处理温度对类球形磺化石墨烯微结构的影响
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作者 邹泽玉 涂川俊 +3 位作者 鲜勇 洪莉睿 刘田华 蒋永华 《新型炭材料》 SCIE EI CAS CSCD 北大核心 2020年第2期148-154,共7页
以非晶态高分子聚合物为碳源,在特定温度的苯磺酸溶液中,一次性脱氢及同步自缩聚制备磺化石墨烯悬浊液,再经喷雾式干燥制得类球形磺化石墨烯颗粒。采用SEM、TEM、BET、FT-IR、Raman和XRD等表征手段对不同热处理温度下的磺化石墨烯颗粒... 以非晶态高分子聚合物为碳源,在特定温度的苯磺酸溶液中,一次性脱氢及同步自缩聚制备磺化石墨烯悬浊液,再经喷雾式干燥制得类球形磺化石墨烯颗粒。采用SEM、TEM、BET、FT-IR、Raman和XRD等表征手段对不同热处理温度下的磺化石墨烯颗粒进行表征;研究类球形磺化石墨烯在750、1 500和2 500℃热处理后的形貌及结构变化;考察不同热处理温度对其表面特性和结晶程度的影响。结果表明,球形磺化石墨烯颗粒的直径尺寸随着热处理温度的升高而逐渐减小,ID/IG值先升高后降低,Lc值由1.55 nm(未热处理)升高到8.08 nm(2 500℃),微晶堆叠厚度增加,结晶程度提高,结构由无序向有序化转变。 展开更多
关键词 磺化石墨烯 热处理 球形结构 喷雾干燥 结晶程度
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Synergistic regulation of current-carrying wear performance of resin matrix carbon brush composites with tungsten copper composite powder 被引量:1
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作者 TU Chuan-jun GONG Pei +4 位作者 REN Gai-mei CHEN Gang CHEN Jian hong li-rui LIU Ping 《Journal of Central South University》 SCIE EI CAS CSCD 2021年第10期2973-2987,共15页
Resin matrix carbon brush composites(RMCBCs)are critical materials for high-powered electric tools.However,effectively improving their wear resistance and heat dissipation remains a challenge.RMCBCs prepared with flak... Resin matrix carbon brush composites(RMCBCs)are critical materials for high-powered electric tools.However,effectively improving their wear resistance and heat dissipation remains a challenge.RMCBCs prepared with flake graphite powders that were evenly loaded with tungsten copper composite powder(RMCBCs-W@Cu)exhibited a low wear rate of 1.63 mm^(3)/h,exhibiting 48.6%reduction in the wear rate relative to RCMBCs without additives(RMCBCs-0).In addition,RMCBCs-W@Cu achieved a low friction coefficient of 0.243 and low electric spark grade.These findings indicate that tungsten copper composite powders provide particle reinforcement and generate a gradation effect for the epoxy resin(i.e.,connecting phase)in RMCBCs,which weakens the wear of RMCBCs caused by fatigue under a cyclic current-carrying wear. 展开更多
关键词 resin matrix carbon brush composite tungsten copper composite powder current-carrying wear particle reinforcement
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