新型炭材料2008，Vol.23Issue(1)：75-80,6.
石油沥青对乳化法煤沥青基炭微球的改性机理
Modification mechanism of coal-tar pitch-based carbon microspheres by an emulsion method with petroleum pitch
薛运伟 1杨常玲 2吕永根 1荣海琴 1王鹏 1潘鼎1
作者信息
- 1. 东华大学,纤维材料改性国家重点实验室,上海,200051
- 2. 东华大学,化学化工与生物工程学院,上海,200051
- 折叠
摘要
Abstract
Coal-tar pitch-based carbon microspheres were prepared by adding petroleum pitch using emulsifying pitch-toluene colloidal solution in polyvinyl alcohol (PVA) glycerol solution. To clarify the influence of pitch solubility in to￣luene and its affinity with the hydrophobic methylene groups of PVA on the sphere formation, petroleum pitch ha￣ving a high affinity with methylene groups was added to the coal tar pitch in different proportions. A model was proposed to tentatively elucidate the sphere formation mechanism. It was found that petroleum pitch addition could improve the sphericity of pitch spheres by stabilizing the surfactant orientation on the interface between pitch molecules and dispersant. Adding petroleum pitch lowered the softening point of mixed pitch and an appropriate amount of addition was needed to ensure a high softening point of mixed pitch spheres above the reaction threshold temperature for air-oxidative stabilization.关键词
煤焦油沥青/石油沥青/溶解性/亲水性/亲油性/微球Key words
Coal-tar pitch/ Petroleum pitch/ Solubility/ Hydrophilicity/ Hydrophobicity/ Microspheres分类
化学化工引用本文复制引用
薛运伟,杨常玲,吕永根,荣海琴,王鹏,潘鼎..石油沥青对乳化法煤沥青基炭微球的改性机理[J].新型炭材料,2008,23(1):75-80,6.
