摘要
采用相转化乳化法,以Tween80+Span80为复配乳化剂,通过优化复配乳化剂的比例以及优选不同的助乳化剂(稳定剂),制备了固含量高达40%的石蜡相变乳状液。分别采用NDJ-1黏度仪和DSC-Q10热流式差示扫描量热仪测试了石蜡相变乳状液的黏度和潜热。结果表明:当复配乳化剂的HLB值在10附近时,即Span80占46.8%(质量分数)、Tween80占53.2%(质量分数),以正丁醇为助乳化剂,可制得分散均匀稳定、流动性好的石蜡相变乳状液,该相变乳状液的黏度随石蜡含量的增加而急剧增大,而潜热则在油相/水相共存时达到最大。当乳状液为油相时,潜热随含水量的增加而增大;当乳状液为水相时,潜热随含水量的增加而减小。
Paraffin-water emulsions were prepared by using a phase transformation emulsification method. SpanS0 and Tween80 were used as the emulsifiers. Paraffin content up to 40% could be obtained by using such a method. The emulsions were characterized for their viscosity and latent heat by using the NDJ-1 viscometer and the Q10 differential scanning calorimeter （DSC）, respectively. The results showed that uniform and stable paraffin wax emulsions could be obtained when the HLB of emulsifiers was about 10 （i.e. the weight ratio of Span80 to Tween80 was round 46.8 ~ 53.2）. The viscosity of the emulsions increased sharply with increasing wax content, whereas the latent heat was at maximum when the oil and water phases coexisted. When the emulsion contains the oil phase only, the latent heat increased with increasing water content, while the latent heat of the emulsions decreased with increasing water content when the emulsion contains the water phase.
出处
《储能科学与技术》
CAS
2014年第2期128-132,共5页
Energy Storage Science and Technology
基金
中国博士后科学基金(2011M501095)
2013年大学生创新创业训练计划(1184513239)项目
关键词
石蜡乳状液
相变
黏度
潜热
paraffin wax emulsion
phase change
viscosity
latent heat
