Aqueous two-phase systems of poly(vinyl alcohol)/alcohol ethoxylate/H<sub>2</sub>O: Binodal curve study

化学工业与工程

Chemcial Industry and Engineering

2022, Vol. 39

Issue (2) :69-75 DOI: 10.13353/j.issn.1004.9533.20210122

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Aqueous two-phase systems of poly(vinyl alcohol)/alcohol ethoxylate/H₂O: Binodal curve study

TAO Haoyue, DANG Leping, HAO Lin, WANG Zhanzhong

School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

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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℃.

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	TAO Haoyue
	DANG Leping
	HAO Lin
	WANG Zhanzhong

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

Received 2021-02-25;

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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,V39(2): 69-75

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