首页> 外文期刊>Journal of Oleo Science >Stable Surfactant-Free Toluene-Polyethylene-in- Water Emulsion Prepared by Ultrasonication at High Temperature
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Stable Surfactant-Free Toluene-Polyethylene-in- Water Emulsion Prepared by Ultrasonication at High Temperature

机译:高温超声稳定制备无表面活性剂的无水甲苯-聚乙烯水乳液

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摘要

Abstract: A toluene-polyethylene (PE) mixture, only partially miscible at room temperature (RT), was ultrasonically dispersed in hot water, followed by immediate cooling to give a highly stable surfactant-free oil-in-water (O/W) emulsion. This temperature effect was correlated with physical gelation of the bulk mixture. Prolonged stabilization was achieved only through dispersion at a temperature (T_d) above the gelation temperature (T_(gel)) of the toluene-low-density PE (LDPE) mixture and subsequent rapid cooling. These stabilized emulsions exhibited characteristics such as a small droplet size with a narrow size distribution, low ^-potential, and round-shaped droplets, which were not observed for the emulsions prepared at T_d < T_(gel) or those at T_d > T_(gel) that had been subjected to slow cooling. From these results, physical gelation through crystallization and modification of the droplet surface by PE were concluded to be essential for the prolonged stability of a surfactant-free toluene emulsion.
机译:摘要:将甲苯-聚乙烯(PE)混合物在室温(RT)下仅部分混溶,将其超声分散在热水中,然后立即冷却以得到高度稳定的无表面活性剂的水包油(O / W)乳液。该温度效应与本体混合物的物理胶凝相关。仅通过在高于甲苯-低密度PE(LDPE)混合物的胶凝温度(T_(gel))的温度(T_d)进行分散并随后进行快速冷却,才能实现长时间的稳定。这些稳定化的乳液表现出诸如小液滴尺寸,窄粒度分布,低^电位和圆形液滴的特性,而在T_d T_(凝胶)进行缓慢冷却。从这些结果可以得出结论,通过结晶和用PE修饰液滴表面进行物理胶凝对于延长不含表面活性剂的甲苯乳液的稳定性至关重要。

著录项

  • 来源
    《Journal of Oleo Science》 |2012年第2期|p.57-63|共7页
  • 作者单位

    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science (2641 Yamazaki, Noda, Chiba 278-8510, JAPAN), Research Institute of Science and Technology, Tokyo University of Science (1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, JAPAN);

    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science (2641 Yamazaki, Noda, Chiba 278-8510, JAPAN);

    International Young Researchers Empowerment Center, Shinshu University;

    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science (2641 Yamazaki, Noda, Chiba 278-8510, JAPAN);

    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science (2641 Yamazaki, Noda, Chiba 278-8510, JAPAN);

    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science (2641 Yamazaki, Noda, Chiba 278-8510, JAPAN), Research Institute of Science and Technology, Tokyo University of Science (1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, JAPAN);

    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science (2641 Yamazaki, Noda, Chiba 278-8510, JAPAN), Research Institute of Science and Technology, Tokyo University of Science (1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, JAPAN);

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    hydrophobic polymer; oil; surfactant-free emulsion; gelation; rapid cooling;

    机译:疏水聚合物油;无表面活性剂的乳液;胶凝快速冷却;

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