發(fā)布時間：2018-12-30 18:29

【摘要】：以司盤80、吐溫80和油酸鈉為乳化劑,采用高剪切乳化法制備仲辛醇乳液,通過單因素試驗和響應面優(yōu)化試驗探索了制備仲辛醇乳液的最佳工藝條件,并研究了電解質(zhì)對乳液穩(wěn)定性的影響,依據(jù)DLVO理論分析了電解質(zhì)對乳液穩(wěn)定性的作用機理。試驗結(jié)果表明:制備乳液的最佳工藝為剪切時間8 min,剪切速率4 530 r/min,乳化劑用量4.9%,仲辛醇含量34.8%,所得乳液平均粒徑為(208±1)nm。電解質(zhì)具有破乳作用,隨電解質(zhì)濃度增加,乳化油珠間靜電排斥作用減小,位能曲線勢壘降低甚至消失,油珠聚并,粒徑增大,乳液趨于不穩(wěn)定甚至破乳;陽離子價態(tài)越高,破乳作用越強。
[Abstract]:The secondary octanol emulsion was prepared by high shear emulsification with Span 80, Tween 80 and sodium oleate as emulsifiers. The optimum process conditions for the preparation of secondary octanol emulsion were investigated by single factor test and response surface optimization test. The effect of electrolyte on emulsion stability was studied, and the mechanism of electrolyte action on emulsion stability was analyzed based on DLVO theory. The results showed that the optimum conditions were as follows: shear time 8 min, shear rate 4 530 r / min, emulsifier dosage 4. 9%, secondary octanol content 34. 8%, and the average particle size of the emulsion was (208 鹵1) nm.. The electrolyte has demulsification effect. With the increase of electrolyte concentration, the electrostatic repulsion between emulsified oil beads decreases, the potential energy curve barrier decreases or even disappears, the oil beads coalesce, the particle size increases, and the emulsion tends to be unstable or even demulsified. The higher the cationic valence, the stronger the demulsification effect.
【作者單位】： 中國礦業(yè)大學(北京)化學與環(huán)境工程學院;
【基金】：國家重點基礎(chǔ)研究發(fā)展計劃(973)資助項目(2012CB214901) 國家自然科學基金青年基金資助項目(51404274)
【分類號】：TD923.12;TD94

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