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机构地区:[1]天津大学理学院,天津300072 [2]天津力神电池股份有限公司,天津300384
出 处:《化学工业与工程》2006年第6期516-519,共4页Chemical Industry and Engineering
摘 要:采用测定电导的方法,确定了30℃时正庚烷/正丁醇/Span80+Tween80/水体系,κm(质量比,正丁醇/Span80+Tween80)=0.5、1.0和2.0的微乳形成的范围,并绘制成微乳液拟三元系统的相图。基于此,用气泡柱法分别测定了κm=0.5、1.0;ωe(质量比,乳化剂/正庚烷)=0.1~0.9不同条件下刚形成微乳和增溶水量最大时微乳之过热极限。实验表明,微乳液的过热极限几乎不随增溶水量而变,这与乳状液过热极限随增溶水量增大而升高存在明显的不同。本文还测定了在ωe=0.4,κm=0.5时,辅助乳化剂(醇类)分别为正丁醇~正辛醇微乳的过热极限,发现随着直链醇的碳原子数增加而微乳液的过热极限也随之升高。Pseudo-ternary phase diagrams in four-component systems of n-C7 H16/n-C4 H10/Span80 + Tween80/ H2O are presented at 30℃ with k. = 0.5,1.0,2.0 (con-surfactant/surfactant, mass ratio) by electrical conductivity respectively. On the basis of these phase diagrams, the superheat limit temperatures of these systems with κm = 0.5, 1.0 and ω e= 0.1--0.9 have been measured by using the column method at two points where the micro-emulsion is just formed and water content is largest. The test results show that the superheat limit temperature hardly varies with the increase of water content. In addition, at ωe = 0.4 and κm= 0.5, the superheat limit temperature of the micro-emulsion was explored respectively with the consurfactant from n-C4H9OH to n-C8H17OH. The test result shows that the ~, superheat limit temperature rises with the increase of the carbon number of con-surfactant (alcohol).
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