中华医学超声杂志

应用化学 ›› 2010, Vol. 27 ›› Issue (10): 1133-1137.DOI: 10.3724/SP.J.1095.2010.90682

• 研究论文 • 上一篇    下一篇

离心系数表征丙烯酰胺反相乳液的稳定性

孟勇,赵飞平,尹笃林*   

  1. (湖南师范大学化学化工学院，资源精细化及先进材料湖南省高校重点实验室 长沙 410081)
  • 收稿日期:2009-10-19 修回日期:2010-04-29 出版日期:2010-10-10 发布日期:2010-10-10
  • 通讯作者: 尹笃林,博士生导师; E-mail:dulinyin@126.com; 研究方向：有机合成应用
  • 作者简介:
  • 基金资助:
    国家自然科学基金（20572021）资助项目

Evaluating the Stability of Acrylamide Inverse Emulsion by Centrifugal Coefficient

MENG Yong, ZHAO Fei-Ping, YIN Du-Lin*   

  1. (Key Laboratory of Resource FineProcessing and Advanced Materials,Universities of Hunan Province,
    College of Chemistry and Chemical Engineering,Hunan Normal University,Changsha 410081)
  • Received:2009-10-19 Revised:2010-04-29 Published:2010-10-10 Online:2010-10-10

PDF

1583

被引次数

9 | 1

摘要：

用丙烯酰胺反相乳液经离心处理后保留的乳液体积与原乳液体积之比（离心系数Vr）考察了丙烯酰胺及其衍生物反相乳液的稳定性。 结果表明，离心系数Vr越大，其乳液的稳定性越好。 在高速离心条件下，由Span80/Span85和Tween80构成的丙烯酰胺及其衍生物反相乳液的Vr与油相质量分数存在正相关的关系。 在油相质量分数确定的情况下，离心系数Vr不仅与3种表面活性剂构成的亲水亲油平衡值（HLB）有关，而且与丙烯酰胺及其衍生物的浓度和类型有关。 HLB值在4.20左右时，乳液是稳定的；随丙烯酸氧乙基三甲基氯化铵（DAC）在水相中质量分数的提高，反相乳液稳定性增强，w(DAC)＞24%时可得到稳定乳液。 在15000 r/min离心3 min，Vr=0.95以上的丙烯酰胺及其衍生物反相乳液很稳定，静置半年仍未出现分层现象。

关键词: 丙烯酰胺, 乳液, 稳定性, 离心系数

Abstract:

The volume ratio of the emulsion before and after centrifugation is defined as centrifugal coefficient Vr, and the stability of the acrylamide and its derivatives inverse emulsion are evaluated by Vr. The results indicated that when Vr is larger, the inverse emulsion system is more stability. The stability of acrylamide and its derivatives inverse emulsions, prepared with surfactants consisting of lipophilic Span80/Span85 and hydrophilic tween80, was characterized by Vr. It is found that a positive correlation relationship exists between Vr and the mass fraction of oil phase. At a fixed mass fraction of oil phase, Vr is related not only to the hydrophilic-lipophilic balance(HLB) value of the three surfactants composite, but also to the concentration and type of acrylamide and its derivatives. When HLB value is about 4.20, the emulsion is stable; When the mass fraction of acryloyloxyethyl trimethyl ammonium chloride(DAC) in the aqueous phase is higher than 24%, the stable emulsion exist; When the mass fraction of DAC is lower than 24%, with the increase of DAC mass fraction in the aqueous phase, the inverse emulsion stability is improved too. It is observed that when Vr is greater than 0.95 by centrifuging for 3 min at 15000 r/min, the inverse emulsion of acrylamide and its derivatives is extremely stable, and the separation of emulsion phase did not occur in reserve even after half a year.

Key words: acrylamide, emulsion, stability, centrifugal coefficient

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