Analysis of spherical polyelectrolyte brushes by small angle X-ray scattering

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• 作者：Xuan-ji Yu (1)
  Wei-hua Wang (1)
  Li Li (1)
  Xu-hong Guo (1)
  Zhi-min Zhou (1)
  Fu-chen Wang (1)
  
• 关键词：SPB ; SAXS ; Nanoparticles
• 刊名：Chinese Journal of Polymer Science
• 出版年：2014
• 出版时间：June 2014
• 年：2014
• 卷：32
• 期：6
• 页码：778-785
• 全文大小：
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• 作者单位：Xuan-ji Yu (1)
  Wei-hua Wang (1)
  Li Li (1)
  Xu-hong Guo (1)
  Zhi-min Zhou (1)
  Fu-chen Wang (1)
  
  1. School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China
  
• ISSN：1439-6203

文摘

Spherical polyelectrolyte brushes (SPBs) with PS core and poly(acrylic acid) (PAA) brushes were prepared and analyzed by SAXS in this article. A radial electron density profile of SPB was brought up, which fits well with the SAXS result and shows a core-shell structure. The effect of pH on SPB form was represented by SAXS and it proves that the chains of SPB will stretch in response to increased pH owning to the increased electrostatic repulsion. SPBs immobilized with magnetic nanoparticles or bovine serum albumin (BSA) were prepared and analyzed by SAXS as well. SAXS could characterize the changes of electron density inside brushes of SPBs due to the immobilization of magnetic nanoparticles or BSA. This provides significant supports for further application of immobilized metal nanoparticles or proteins.