聚乙烯醇/脂肪醇聚氧乙烯醚/水双水相体系:双节点曲线图研究

摘要水溶性聚合物与非离子表面活性剂组成的双水相体系因其可生物降解性和无毒性而受到人们的广泛关注。研究了由聚乙烯醇（BP-05、BP-17和BP-24）、脂肪醇聚氧乙烯醚（AE7）和水组成的双水相体系在25、35和45℃下的液-液平衡数据和双节点曲线图。结果表明：由聚乙烯醇（BP-05、BP-17或BP-24）、AE7和水组成的体系，由于空间位阻效应，极易出现相分离现象，形成双水相体系；BP-24/AE7/H₂O体系（25、35和45℃）的双节曲线图中单相区的面积随温度的升高而减小；35℃下的BP-05/AE7/H₂O体系和BP-24/AE7/H₂O体系双节点曲线图比较相似，而35℃下的BP-17/AE7/H₂O体系的双节点曲线不对称性显著增大。

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	陶皓月
	党乐平
	郝琳
	王占忠

关键词：聚乙烯醇脂肪醇聚氧乙烯醚双水相体系双节点曲线图

Abstract： The study of aqueous two-phase systems (ATPSs) formed by water-soluble polymer and nonionic surfactant has received attention in recent years because of the biodegradability and nontoxicity of their components. In this work, liquid-liquid equilibrium data and binodal curves were obtained for the ATPSs composed of PVA (BP-05, BP-17 and BP-24), alcohol ethoxylate (AE7) and water at 25℃, 35℃ and 45℃. The results show that in terms of the systems made up of PVA (BP-05, BP-17 or BP-24), AE7 and water, the mixtures are very easy to appear phase separation due to the steric effect. The areas of homogeneous region in binodal curves gradually diminish with the temperature increasing for the systems constituted by BP-24, AE7 and water at 25℃, 35℃ and 45℃. The binodal curves of BP-05/AE7/H₂O systems and BP-24/AE7/H₂O systems at 35℃ are very similar,the asymmetry of the binodal curve obviously increases for BP-17/AE7/H₂O systems at 35℃.

Keywords： poly(vinyl alcohol)(PVA)； alcohol ethoxylate (AE7)； aqueous two-phase systems； binodal curve

Received 2021-02-25;

Fund:国家自然科学基金（21978206）。

Corresponding Authors: 党乐平,副教授,E-mail:dangleping@tju.edu.cn。 Email: dangleping@tju.edu.cn

About author: 陶皓月(1995-),女,硕士研究生。现从事聚合物和表面活性剂双水相体系的研究。

引用本文:

陶皓月, 党乐平, 郝琳, 王占忠.聚乙烯醇/脂肪醇聚氧乙烯醚/水双水相体系:双节点曲线图研究[J]. 化学工业与工程, 2022,39(2): 69-75

TAO Haoyue, DANG Leping, HAO Lin, WANG Zhanzhong.Aqueous two-phase systems of poly(vinyl alcohol)/alcohol ethoxylate/H₂O: Binodal curve study[J]. Chemcial Industry and Engineering, 2022,39(2): 69-75

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