Electrostatic-assembly Behavior Between Cationically Modified Silica and End-functionalized Polystyrene

Chem. J. Chinese Universities

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Electrostatic-assembly Behavior Between Cationically Modified Silica and End-functionalized Polystyrene

SHI Bo¹, ZHANG Yong-Hua¹*, SHI Yao-Gang², WANG Jian-Hua²

1. Department of Polymer Science, South China University of Technology, Guangzhou 510640, China;
2. China Academy of Engineering Physics, Mianyang 621900, China

Received:2007-12-18 Revised:1900-01-01 Online:2008-04-10 Published:2008-04-10
Contact: ZHANG Yong-Hua

Abstract

Abstract: Polystyrene brushes were constructed on cationically modified silica nanoparticles(SiO₂-CBAFS) by electrostatic-assembly. TGA, TEM, AFM and contact angle were used to characterize the mass loss, microscopic images, topology, surface property of the products, respectively. The results show that PS-NH-SO₃Na can be successfully attached to the surface of SiO₂-CBAFS nanoparticles by electrostatic-assembly with high grafting density, which is much higher than that from the reports; the aggregation of silica can be prevented efficiently by being assembled a monolayer of PS-NH-SO₃Na; the water contact angles of the Si/SiO₂-CBAFS/PS-NH-SO₃Na decrease with the increase of molecular weight and the mass concentration of PS-NH-SO₃Na under different environments.

Key words: Cationical modification, Silica nanoparticles, End-functionalization, Polystyrene, Electrostatic-assembly

CLC Number:

O631
O641.3

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SHI Bo¹, ZHANG Yong-Hua¹*, SHI Yao-Gang², WANG Jian-Hua². Electrostatic-assembly Behavior Between Cationically Modified Silica and End-functionalized Polystyrene[J]. Chem. J. Chinese Universities, doi: .

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Electrostatic-assembly Behavior Between Cationically Modified Silica and End-functionalized Polystyrene

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