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  • 段严,袁兴中,曾光明,黄华军,冷立健,王雪丽.基于生物表面活性剂的柴油微乳体系构建与性能研究[J].环境工程学报,2013,7(11):4586-4592.DOI:    [点击复制]
  • Duan Yan,Yuan Xingzhong,Zeng Guangming,Huang Huajun,Leng Lijian,Wang Xueli.Study on properties and construction of diesel microemulsions based on biosurfactant[J].,2013,7(11):4586-4592.DOI:   [点击复制]
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基于生物表面活性剂的柴油微乳体系构建与性能研究
段严1,2, 袁兴中1,2, 曾光明1,2, 黄华军1,2, 冷立健1,2, 王雪丽1,2
0
(1. 湖南大学环境科学与工程学院, 长沙 410082;2. 环境生物与控制教育部重点实验室(湖南大学), 长沙 410082)
摘要:
以生物表面活性剂鼠李糖脂(RL)为表面活性剂,中长碳链正构醇(正丁醇、正戊醇、正己醇、正庚醇及正辛醇)为助表面活性剂,采用滴定法制备RL/柴油/正构醇/水柴油微乳体系,并考察了表面活性剂用量(Km)、助表面活性剂醇的种类及用量(δas)及离子强度对柴油微乳体系最大增溶水量(Wo)的影响,并对不同条件下获得的柴油微乳体系的运动粘度(μ)和表面张力(γ)进行了表征。通过荧光法测得RL在柴油中的临界胶束浓度CMC为7 g/L。当生物表面活性剂与柴油的质量比Km为0.02,助表面活性剂选用正庚醇且醇与表面活性剂的质量比δas为0.1,NaOH溶液质量分数为0.06%时,柴油微乳体系的μγ较低,Wo最大,性能较佳。
关键词:  生物表面活性剂  柴油微乳液体系  助表面活性剂  正构醇
DOI:
投稿时间:2012-09-25修订日期:2012-10-18
基金项目:国家自然科学基金资助项目(21276069);高等学校博士学科点专项科研基金项目(20120161130002)
Study on properties and construction of diesel microemulsions based on biosurfactant
Duan Yan1,2, Yuan Xingzhong1,2, Zeng Guangming1,2, Huang Huajun1,2, Leng Lijian1,2, Wang Xueli1,2
(1. College of Environmental Science and Engineering, Hunan University, Changsha 410082, China;2. Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China)
Abstract:
Diesel microemulsions were formed by tration with rhamnolipid (RL, a biosurfactant) as surfactant and five normal alcohols (butanol, pentanol, hexanol, heptanol and octanol) as cosurfactants. The effects of several parameters on the content of solubilization water (Wo) of diesel microemulsions were investigated, including the mass ratio of surfactant to diesel(Km), the type of cosurfactant and the mass ratio of cosurfactant to surfactant(δas) and ionic strength. Moreover, the kinematic viscosity (μ) and interfacial tention(γ) of diesel microemulsions formed under different conditions were characterized. With the method of fluorescence, the critical micelle concentration (CMC) of RL in diesel was detected at 7 g/L. When Km and δas (heptanol as cosurfactant) were set at 0.02 and 0.1, respectively and the mass fraction of NaOH solution was 0.06%, the γ and μ of diesel microemulsions were smaller and the Wo was the highest, which suggested that the obtained diesel microemulsions had superior performance under above conditions
Key words:  biosurfactant  diesel microemulsions  cosurfactant  n-alcohols