含非离子表面活性剂吐温-80的微乳液结构研究

摘要

We selected tween-80,petroleum ether,and n-butanol as nonionic surfactant,oil phase and cosurfactant,repectively,and prepared the microemulsions.The structural parameters of O/W microemulsion system of tween-80/petroleum ether-butanol/water were measured by dilution method and calculated based on the sphere model.The pH and conductance of the system were also measured during the temperature from 15 to 30 ℃.The effects of the temperature on the microemulsions were discussed in detail.On the second hand,we added the water-soluble polymer,poly（vinyl pyrrolidone）（PVP） into the system.At the same time,the effects of water-soluble polymer on the microemulsion were conducted by measuring the electric conductance and contact angle.The results showed that the electric conductance increases along with the temperature rise,the electric conductance increased but the contact angle reduces by the adding of PVP at room temperature.%采用非离子表面活性剂吐温-80,以石油醚为油相,正丁醇为助表面活性剂来制备微乳液。用稀释法测定并计算了Tween-80/石油醚/正丁醇/水体系O/W型微乳的结构参数。测量微乳液体系在15~30℃温度范围内的pH及电导,考察温度对微乳液体系的影响。向微乳液体系中加入PVP,测量体系的电导和接触角,考察水溶性高分子对微乳液体系的影响。结果表明微乳液体系的电导随温度的上升而变大,相同温度时,加入PVP会使体系的电导变大,接触角变小。