Rheological Behavior of Ferrocene-modified Polyacrylamide in Aqueous Solutions

Zhi-ping Jiang; Yong-gang Shangguan; Qiang Zheng

doi:10.11777/j.issn1000-3304.2015.14219

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Rheological Behavior of Ferrocene-modified Polyacrylamide in Aqueous Solutions

Research Article | 更新时间：2021-03-19

- Rheological Behavior of Ferrocene-modified Polyacrylamide in Aqueous Solutions
- Acta Polymerica Sinica Issue 1, Pages: 120-126(2015)
- 作者机构：
  
  高分子合成与功能构造教育部重点实验室浙江大学高分子科学与工程学系,杭州,310027
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2015.14219
  CLC：
- Published：20 January 2015，
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Zhi-ping Jiang, Yong-gang Shangguan, Qiang Zheng. Rheological Behavior of Ferrocene-modified Polyacrylamide in Aqueous Solutions. [J]. Acta Polymerica Sinica (1):120-126(2015)
DOI：

Zhi-ping Jiang, Yong-gang Shangguan, Qiang Zheng. Rheological Behavior of Ferrocene-modified Polyacrylamide in Aqueous Solutions. [J]. Acta Polymerica Sinica (1):120-126(2015) DOI： 10.11777/j.issn1000-3304.2015.14219.

摘要

采用Post-Modification技术在二甲基亚砜中直接对聚丙烯酰胺进行烷基化反应

接枝二茂铁官能团(Fc)

制备出一种具有氧化还原性质的二茂铁改性聚丙烯酰胺(PAM-Fc). 通过红外光谱(FTIR)、核磁氢谱(1H-NMR)、热失重(TGA)、电化学、动态流变测试等方法对PAM-Fc的化学结构、电化学活性和流变特性进行了表征. 研究结果表明

PAM-Fc具有氧化还原性

相比PAM呈现更好的热稳定性

这主要源于 Fc基团稳定了PAM分子链的自由基. Fc基团在水溶液中的疏水缔合作用会导致体系黏度显著增大. 通过添加NaCl、-环糊精或H2O2等可以对PAM-Fc水溶液的黏度进行有效调控. 其中

NaCl可以屏蔽PAM-Fc分子链上的电荷

-环糊精能够包合Fc基团

H2O2则可将疏水的还原态Fc基团氧化成亲水的氧化态Fc

从而实现PAM-Fc水溶液流变行为的调节.

Abstract

A redox polymer ferrocene-modified polyacrylamide (PAM-Fc) was prepared by using post-modification technology to modify polyacrylamide with grafted ferrocene functional groups in alkylation reaction in dimethyl sulfoxide directly.Chemical structure

electrochemical activity and rheological properties of PAM-Fc in aqueous solutions were investigated respectively.It was found that the thermal stability and redox property were improved significantly and the viscosity of PAM-Fc aqueous solutions increased obviously compared with pure PAM due to the hydrophobic association of Fc groups.Fc groups can stabilize the free radical of PAM polymer chains to improve the thermal stability of PAM-Fc.Furthermore

the viscosity of PAM-Fc aqueous solutions can be adjusted by adding NaCl which can shield the charge on the PAM-Fc molecule chains

-cyclodextrins being a host material which can entrap Fc groups and H2O2 which can oxidize Fc from reduction state to oxidation state and turn hydrophobic Fc to hydrophilic Fc.

关键词

聚丙烯酰胺二茂铁流变行为氧化还原聚合物

Keywords

PolyacrylamideFerroceneRheological behaviorRedox polymer

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Related Institution

College of Materials Science and Engineering, Qingdao University

Department of Polymer Science and Engineering, Zhejiang University

College of Chemistry and Materials Engineering, Zhejiang Agriculture & Forest University

International Research Center for X Polymers, Zhejiang University, Haining

MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University

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