A Facile Strategy for Controlling the Self-Assembly of Nanocomposite Particles Based on Colloidal Steric Stabilization Theory

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• 作者：Qian Wu ; Zhaoqun Wang ; Xuanfeng Kong ; Xiaodan Gu ; Gi Xue
• 刊名：Langmuir
• 出版年：2008
• 出版时间：August 5, 2008
• 年：2008
• 卷：24
• 期：15
• 页码：7778-7784
• 全文大小：310K
• 年卷期：v.24,no.15(August 5, 2008)
• ISSN：1520-5827

文摘

A heterocoagulation strategy based on colloidal steric stabilization theory has been developed, through which polystyrene (PS) and silica (SiO₂) particles without any surface modification or functionalization self-assembled rapidly via solution to afford nanocomposite particles with raspberry-like morphology. The formation mechanism is fully studied on the basis of a thermodynamic analysis. The soluble stabilizer and the solvent quality are the main determining factors, which have a significant influence on this self-assembly process and the silica coverage of resultant composites. The relative size of PS to SiO₂ candidates also has the effect of control on the extent of self-assembly. Furthermore, this strategy can be applied to fabricate a broad range of composite materials, including PS/TiO₂, PS/AgI, as well as PS/PS composites.