文献类型：期刊文献

英文题名：Coacervation of Spherical Polyelectrolyte Brushes with Additional Polyelectrolytes Bearing Positive or Negative Charges

作者：Wang, Yunwei[1,2];Li, Li[1,2];Wang, Yiming[1,2];Yang, Qingsong[1,2];Ye, Zhishuang[1,2];Fu, Zhinan[1,2];Sun, Liang[3];Guo, Xuhong[1,2,3]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Engn Res Ctr Large Scale Reactor Engn & Technol, Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Int Joint Res Ctr Green Energy Chem Engn, Shanghai 200237, Peoples R China;[3]Shihezi Univ, Engn Res Ctr Xinjiang Bingtuan Mat Chem Engn, Shihezi 832000, Xinjiang, Peoples R China

年份：2021

卷号：37

期号：21

起止页码：6388

外文期刊名：LANGMUIR

收录：;EI(收录号：20212510541200);WOS:【SCI-EXPANDED(收录号:WOS:000659381500005)】；

基金：We are very grateful for financial support from the NSFC Grants (51773061 and 51761135128) and the Key Scientific and Technological Project of Xinjiang Bingtuan (2018AB025). We especially thank the Shanghai Synchrotron Radiation Facility (SSRF) for experimental support.

语种：英文

外文关键词：Chlorine compounds - Emulsification - Polyelectrolytes

摘要：By combining small-angle X-ray scattering, wide-angle X-ray scattering, and rheology, the effect of additional polyelectrolyte chains on interactions among spherical polyelectrolyte brushes (SPB) was systematically investigated both on microscopic and macroscopic levels. The negatively charged poly(acrylic acid) (PAA) chains and positively charged poly(dimethyl diallyl ammonium chloride) (PDDA) chains were used as additional polyelectrolyte chains to investigate the local ordered structure and the "polyelectrolyte peak" among SPB. Interestingly, coacervation appeared in the SPB emulsion while introducing additional free polyelectrolyte chains. The addition of excess positively charged PDDA chains would lead to the transformation of the SPB emulsion from the coacervation to the aggregation, while it has not been observed in the case of PAA chains. Moreover, it was further confirmed that the specific local ordered structure was caused by the electrostatic interaction among polyelectrolyte chains of adjacent SPB. This work could enrich our understanding of polyelectrolyte assembly in concentrated SPB, thereby greatly broadening the application fields of SPB.