综合评分法优化石蜡乳化工艺

Optimization of process technique in paraffin emulsification by colligation score

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.