综合评分法优化石蜡乳化工艺
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摘要
采用机械搅拌的方法制备石蜡乳液。选用Span-80、Tween-80、平平加O-25和聚乙二醇为工业石蜡复配乳化剂,考察了乳化石蜡的亲水亲油平衡值(HLB)、乳化剂用量对乳液的分散性、稳定性、表面张力、色泽及外观的影响。结果表明,乳化最佳工艺条件:HLB值9.99,乳化剂与石蜡的质量比0.32,乳化时间25 min,乳化温度80℃,搅拌速度600 r/min,乳化水用量为乳液质量的68%。在此最佳条件下,可制得表面张力低、分散性和稳定性好,均匀细腻的石蜡乳液,乳化颗粒的粒径分布较窄。
Paraffin emulsion was prepared by the mechanical stirring. Span-80,Tween-80,Peregal O-25 and polyethylene glycol were used as compound emulsifier for paraffin emulsification. The influence of the hydrophilic-lipophilic balance( HLB) and emulsifier dosage on the colligation score of the emulsion( i.e.,dispersion,stability,surface tension,color and appearance) were investigated. The optimum results were as follows:HLB was 9. 99,the mass ratio of compound emulsifier to wax was 0. 32,emulsifying time was 25 min,emulsifying temperature was 80 ℃,stirring speed was 600 r/min,and emulsifying water was68% by gross. The homogeneous and delicate paraffin emulsion samples had low surface tension,good dispersion and stability,and narrow size distribution.
Paraffin emulsion was prepared by the mechanical stirring. Span-80,Tween-80,Peregal O-25 and polyethylene glycol were used as compound emulsifier for paraffin emulsification. The influence of the hydrophilic-lipophilic balance( HLB) and emulsifier dosage on the colligation score of the emulsion( i.e.,dispersion,stability,surface tension,color and appearance) were investigated. The optimum results were as follows:HLB was 9. 99,the mass ratio of compound emulsifier to wax was 0. 32,emulsifying time was 25 min,emulsifying temperature was 80 ℃,stirring speed was 600 r/min,and emulsifying water was68% by gross. The homogeneous and delicate paraffin emulsion samples had low surface tension,good dispersion and stability,and narrow size distribution.
引文
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[3]Virginia Vasile,Horia Necula,Adrian Badea,et al.Experimental study of the heat transfer characteristics of a paraffin-in-water emulsion used as a secondary refrigerant[J].International Journal of Refrigeration,2018,88:1-7.
[4]陆威,吴永卫.石蜡微乳液在板式换热器内的流动和传热特性研究[J].上海理工大学学报,2017,39(2):127-131.
[5]黄莉.石蜡/水相变乳液的稳定性能和储能容量[J].材料研究学报,2017,31(10):789-795.
[6]Li Yuanyuan,Yu Shun,Chen Pan,et al.Cellulose nanofibers enable paraffin encapsulation and the formation of stable thermal regulation nanocomposites[J].Nano Energy,2017,34:541-548.
[7]曹同玉,刘庆普,胡金生.聚合物乳液合成原理及应用[M].北京:化学工业出版社,1997.
[8]候长军,刘勇,霍丹群,等.具有良好稳定性的石蜡乳液的制备及改进[J].应用化工,2010,39(2):175-181.
[9]付雪,诸林,刘娟,等.无助乳化剂的非离子型石蜡乳液的制备影响高固含量石蜡乳液颗粒度因素的考察[J].石油化工,2013,42(9):967-972.
[10]陈惠芳,蒋新元,罗建阳,等.超细石蜡乳液的制备及性能研究[J].化工技术与开发,2017,46(10):15-19.