相反转工艺制备巴西棕榈蜡乳液的粒径调控  

Particle Size Control of Carnauba Wax Emulsion Prepared by Phase Inversion Processing

作　　者：李芳芳[1] 段玉丰[1] 

机构地区：[1]河北科技大学材料科学与工程学院,河北省材料近净成型技术重点实验室,石家庄050018

出　　处：《涂料工业》2015年第2期35-40,共6页Paint & Coatings Industry

基　　金：河北省高等学校科学技术研究重点项目(项目编号:ZD2014102)

摘　　要：分别采用经过相反转过程的水入蜡乳化法和直接将蜡加入水中进行乳化的蜡入水乳化法2种工艺制备蜡乳液,测试所得蜡乳液粒径及分布等性能,分析乳化剂选择及复配、乳化剂用量、蜡水质量比、搅拌速度、乳化温度和时间等因素对蜡乳液粒径及其分布的影响。试验结果显示:采用相反转工艺,以乳化剂Span-80、Tween-80和助乳化剂十二烷基硫酸钠组成乳化剂体系,在乳化剂的用量为蜡质量的20%、蜡水质量比为1∶5、乳化温度为90℃、搅拌速度大于1 500 r/min,乳化时间为40 min条件下,能够得到平均粒径小于100 nm的蜡乳液。透射电镜照片显示蜡乳液粒子形状为球形。The preparation technology and morphology of carnauba wax emulsion prepared by phase inversion processing were investigated. Two kinds of wax emulsion preparation technologies such as water into wax emulsification method based on phase inversion processing and wax into water emulsification method were applied to prepare wax emulsions respectively. Particle size and size distribution of the prepared wax emulsion were determined. The effect of dispersion by high speed homogenizer on particle size was also discussed. In addition, the effects of selection and synergy of emulsifiers, concentration of emulsifier, mass ratio of carnauba wax to water, stirring speed, emulsifying temperature and time on the particle size and size distribution of wax emulsions were ana- lyzed. The results indicated that wax emulsion with average particle size less than 100 nm could be obtained via phase inversion processing by using span-80, tween-80 and sodium dodecyl sulfate as synergized emulsifiers, satisfying the conditions including the mass ratio of emulsifier to carnauba wax 20%, mass ratio of wax to water less than 1：5, stirring speed higher than 1 500 r/min, emulsifying temperature 90 ℃ and emulsifying time 30 min. The shape of wax particle in emulsion was spherical observed by transmission electron microscopy（TEM）.

关 键 词：相反转工艺 蜡乳液 粒径及分布 巴西棕榈蜡 

分 类 号：TQ637.81[化学工程—精细化工]