Interaction of sodium and potassium ions with PEO-PPO copolymer investigated by FTIR, Raman and NMR

被引：24

作者：

Li, Xiaopei ^{[1
,2
,3
]}

Huang, Kun ^{[1
]}

Xu, Yizhuang ^{[3
]}

Liu, Huizhou ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Being Natl Lab Mol Sci, Beijing 100871, Peoples R China

来源：

VIBRATIONAL SPECTROSCOPY | 2014年 / 75卷

基金：

中国国家自然科学基金;

关键词：

PEO-PPO copolymer; Self-assembly; Interactions; Cations; Vibrational band shift; BLOCK-COPOLYMER; AQUEOUS-SOLUTIONS; POLY(ETHYLENE OXIDE); TRIBLOCK COPOLYMERS; PHASE-SEPARATION; AGGREGATION BEHAVIOR; MICELLIZATION; SALT; WATER; MICELLES;

D O I：

10.1016/j.vibspec.2014.10.001

中图分类号：

O65 [分析化学];

学科分类号：

070302 [分析化学];

摘要：

Many papers have reported that salt ions can exert a great influence on the self-assembly behavior of PEO-PPO copolymers in the aqueous solution. Whereas the mechanism through which salt ions influence the self-assembly behavior of PEO-PPO copolymers is unclear and the dispute is mainly focused on whether the salt ions have a direct interaction with PEO-PPO copolymers. In this paper, the interaction of sodium and potassium ions with PEO-PPO copolymer was investigated by using FTIR, Raman and Na-23 NMR spectroscopy. Experimental results reveal that direct interactions between salt cations and PEO-PPO macromolecular chains indeed occur in appropriate conditions. The present work highlights the role of cations in the self-assembly process of PEO-PPO copolymer. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：59 / 64

页数：6

共 49 条

[1]

Differential scanning calorimetry investigation of the effect of salts on aqueous solution properties of an amphiphilic block copolymer (Poloxamer) [J].