Citation: Xuan-ji Yu, Wei-hua Wang, Li Li, Xu-hong Guo, Zhi-min Zhou, Fu-chen Wang. Analysis of Spherical Polyelectrolyte Brushes by Small Angle X-ray Scattering[J]. Chinese Journal of Polymer Science, ;2014, 32(6): 778-785. doi: 10.1007/s10118-014-1456-3 shu

Analysis of Spherical Polyelectrolyte Brushes by Small Angle X-ray Scattering

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School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

Corresponding author: Li Li,
Received Date: 22 September 2013
Revised Date: 25 November 2013

Fund Project: This work was financially supported by the National Natural Science Foundation of China (No. 20774028), the Fundamental Research Funds for the Central Universities, the Higher School Specialized Research Fund for the doctoral program (20110074110003), and Shanghai Synchrotron Radiation Facility.

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.
- SPB,
- SAXS,
- Nanoparticles
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