Construction of Dendritic-Linear Brushes on Silica Nanoparticles by Electrostatic Assembly

Bo Shi; Liang Liang; Bo Lin; Min Hua Qi

doi:10.4028/www.scientific.net/AMR.652-654.490

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 652-654Construction of Dendritic-Linear Brushes on Silica...

Construction of Dendritic-Linear Brushes on Silica Nanoparticles by Electrostatic Assembly

Abstract:

Using dendritic bromide poly (benzyl ether), G₂-Br, as macroinitiator, dendritic-linear polymer (G₂-PS-NHSO₃Na) was obtained via atom transfer radical polymerization and nucleophilic substitution of G₂-PS-Br. G₂-PS-NHSO₃Na was constructed on cationic silica by both electrostatic attraction and steric effort coming from dendritic block of G₂-PS-NHSO₃Na. ¹H-NMR and differential scanning calorimetry were used to characterize the structure and thermal behavior of G₂-PS-NHSO₃Na; thermo-gravimetric analysis and TEM were applied to analysis the assembly amount of G₂-PS-NHSO₃Na and the dispersibility of silica before and after assembly. The results show that G₂-PS-NHSO₃Na can be synthesized successfully and has exact structure; it can be constructed on cationic silica with 27% assembly amount; the aggregation of silica can be prevented effectively by the dendritic-linear brushes, but the molecular weight of linear segment and the generation of dendritic block will influence the assembly behavior and the amount of the dendritic-linear brushes.

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Periodical:

Advanced Materials Research (Volumes 652-654)

Pages:

490-494

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.652-654.490

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Online since:

January 2013

Authors:

Bo Shi, Liang Liang, Bo Lin, Min Hua Qi

Keywords:

Brushes, Dendritic-Linear, Electrostatic Assembly, Silica

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