Cloud point behavior of thermosensitive triblock copolymer L61 in the presence of electrolytes. Issue 4 (3rd April 2017)

• Record Type: Journal Article
• Authors: Xie, Xueqiao; Han, Juan; Zhang, Qianqian; Rao, Wenwei; Wang, Yun; Wu, Jiacong; Ni, Liang
• Is Part Of: Journal of dispersion science and technology. Volume 38:Issue 4(2017)
• Page Start: 494
• Page End: 497
• Publication Date: 2017-04-03
• Subjects: Cloud point -- electrolytes -- L61 -- thermosensitive copolymer; Emulsions -- Periodicals; Suspensions (Chemistry) -- Periodicals; Emulsions; Suspensions; 541.34
• DOI: 10.1080/01932691.2016.1180626
• Languages: English
• ISSNs: 0193-2691

Abstract

ABSTRACT: Herein the effect of additives on the cloud point of thermosensitive copolymer Poly (ethylene oxide)–Poly (propylene oxide)–Poly (ethylene oxide) (PEO–PPO–PEO, L61) was investigated, including NaCl, NaOH, NaBr, Na2 CO3, Na3 PO4, Na2 SO4, Na2 HPO4, ZnSO4, FeSO4 and MnSO4 at different concentrations. It was found that the cloud point of L61 was lowered by adding the electrolytes and decreased linearly with increasing electrolytes concentration. In these systems, the addition of polyvalent anions resulted in a more pronounced salting-out effect than monovalent anions. A depression in the cloud point of L61 in the presence of multivalent electrolytes was observed in a trend of > >Cl − . Meanwhile, the ability of divalent anion lower cloud point evaluated by Gibbs free energy was appropriated, and the order as follows: > > . The capacity of divalent cation to reduce the cloud point followed the order Zn 2+ >Fe 2+ >Mn 2+. GRAPHICAL ABSTRACT: