Paper Title:
Synthesis of Novel Raspberrylike Silica/Polypyrrole Hybrids Based on Single Silica Particle
  Abstract

Novel raspberrylike organic-inorganic hybrids consisting of spherical silica supporting smaller conductive polypyrrole particles were prepared through a self-assembly polymerization process by choosing chitosan as a modifying agent of silica surface. TEM shows the raspberrylike morphology of resulted hybrids. Hydrogen-bonding interaction between the acetylamino of chitosan and hydrogen atom on nitrogen of polypyrrole is a determining parameter to get the raspberrylike morphology. The raspberrylike silica-polypyrrole hybrids exhibited high conductivity of 8 s.cm-1 and its suspensions possessed good stability because of the special surface morphology. In the past few years, organic-inorganic nanocomposite particles have become the subject of rapidly growing interest for their superior properties (optical, mechanical, rheological, electrical, catalytic);1-2 In this field, silica is the most commonly used inorganic support. On the other hand, polypyrrrole(Ppy) is also commonly used organic shell.3 If Ppy nanocomposite systems can be prepared in stable colloidal form, the poor processibility of Ppy can be overcome, at lest partly, so that its applications can extended to wide areas. However, since silica is initially hydrophilic, hydrophobic Ppy shell is very difficult to get by direct surface polymerization. Only “raspberry” like composite was got. A high-resolution TEM picture obtained by Gill et. al. was the first report to reveal this unusual “raspberry” morphology where the composite particles were aggregates of the original small silica particles held together by the conducting polymer component which

  Info
Periodical
Solid State Phenomena (Volume 111)
Edited by
Cheng-Jun Sun, Jun Ding, Manoj Gupta, Gan-Moog Chow, Lynn Kurihara and Lawrence Kabacoff
Pages
83-86
DOI
10.4028/www.scientific.net/SSP.111.83
Citation
X.M. Yang, T. Y. Dai, Y. Lu, "Synthesis of Novel Raspberrylike Silica/Polypyrrole Hybrids Based on Single Silica Particle", Solid State Phenomena, Vol. 111, pp. 83-86, 2006
Online since
April 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Bao Qiang Li, De Chang Jia, Yu Zhou, Qiao Ling Hu, Wei Cai
Abstract:Magnetic hydroxyapatite/chitosan nanocomposites were prepared via in situ hybridization strategy in the ambient condition. Magnetic...
357
Authors: Xiao Liang Wang, Xu Dong Li, Xiao Min Wang, Jian Lu, Hui Chuan Zhao, Xing Dong Zhang, Zhong Wei Gu
Abstract:Collagen (Col) and chitosan (Chi) are both natural polymers and have received extensive investigation in recent years in the field of tissue...
415
Authors: Juan Fco Luna Martínez, E. Reyes-Melo, Virgilio González-González, A. Torres-Castro, Carlos Guerrero-Salazar, Selene Sepúlveda-Guzmán
Abstract:In this work, iron oxide nanoparticles (~5 nm) embedded in a chitosan polymer film, were synthesized. In order to obtain this nanostructured...
51
Authors: Anna Theocharidou, K. Tsoptsias, Eleana Kontonasaki, Lambrini Papadopoulou, C. Panayiotou, Konstantinos M. Paraskevopoulos, Petros Koidis
Abstract: Chitin is a polysaccharide abundant in nature. Its’ deacetylation product-chitosan- in combination with gelatin (collagen product) is...
866
Authors: Song Chen, Nobutaka Hanagata
Chapter 1: Advanced Bio-, Medical-Material Technology and Application
Abstract:Silica-chitosan hybrid was synthesized from a mixture of chitosan and glycidyloxypropyltrimethoxysilane and then coated on a microgrooved...
165