Third Day Poster Session, 17 June 2010 - NanoTR-VI

Poster Session, Thursday, June 17
Theme F686 - N1123
Synthesis and Characterization of Polyimide-silver Nanocomposite Containing Chalcone Moieties in
The Main Chain by UV-radiation
Khalil Faghihi 1 *, Meisam Shabanian 1
1 Organic Polymer Research Laboratory, Department of Chemistry, Faculty of Science, Arak University, Arak, 38156, Iran,
Abstract-The soluble polyimide (PI)-silver nanocomposite (PISN) 6a containing chalcone moieties as a photosensitive group was synthesized
successfully by a convenient ultraviolet irradiation technique. A precursor such as AgNO 3 was used as the source of the silver particles.
Polyimide 6 as a source of polymer was synthesized by the one-step synthesis of polyimide from polycondensation reaction of 4,4'-diamino
chalcone 4 with pyromellitic anhydride 5 in the presence of iso-quinoline solution. The resulting composite film was characterized by FTIR
spectoscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetry (TGA) and diffrantial scanning calorimetry
(DSC).
There is intense interest in the synthesis and properties of
metal clusters and nanoparticles prepared in both aqueous and
organic solutions and prepared in condensed state, for
instance, polymers, zeolites and glasses. Clusters,
nanoparticles and its containing materials are potentially
useful in a wide range of application, including highly active
catalysts [1], magnetic materials, quantum dots and
miniaturization of electronic devices and nonlinear optical
materials [2-5]. In this work, we investigated the preparation
of new polyimide (PI)-silver nanocomposite by convenient
ultraviolet irradiation technique at room temperature. The
silver nanoparticles were homogeneously dispersed in the PI
matrix and the PI–silver nanocomposites exhibited an
ultraviolet–visible (UV-vis) absorption peak, corresponding to
the characteristic surface plasmon resonance of silver
particles.
Polyimide 6 as a source of polymer was synthesized by the
one-step synthesis of polyimide from polycondensation
reaction of 4,4'-diamino chalcone 4 with pyromellitic
anhydride 5 in m-cresol solution and in the presence of isoquinoline
as a base (Figure 1).
Figure 2. SEM image of polyimide-silver nanocomposite 6a
In summery in this work, a polyimide-silver nanocomposite
containing chalcone moieties was successfully prepared by a
convenient reduction of silver by ultraviolet irradiation
technique. From the SEM and XRD investigations, the silver
nanopaticles homogeneously dispersed in the PI matrix. In the
UV–vis absorption spectra of the PI-silver nanocomposite, the
absorption peak due to the surface plasmon resonance of silver
particles was observed at 418 nm. Because of the good
thermal properties and Due to presence chalcone moieties in
polymer backbone, these silver/PI nanocomposites can be
photosensitive and has the potential for use in
microfabrication of conductive components in microelectronic
industry.
*Corresponding author: k-faghihi@araku.ac.ir
Figure 1. Synthetic route of PI 6
The soluble PI–silver nanocomposite was prepared by using
ultraviolet irradiation is presented. A precursor of the silver
particles AgNO3 was used. The XRD pattern of the soluble
PI-silver nanocomposite 6a. shows five diffraction peaks in
the XRD patterns of samples 6a widen greatly, indicating the
formation of the nanometer scale of silver particles in the PIsilver
nanocomposite. Figure 1 containing diffraction signals
at 2h values of 38.2 º, 45.3 º, 66.1 º, 75.5 º and 83.7 attributed
to the diffraction planes (1 1 1), (2 0 0), (2 2 0), (3 1 1) and (2
2 2) of fcc silver nanoparticles confirming the presence of
silver nanoparticles in the nanocomposites. The SEM
micrograph of the PI-silver nanocomposite 6a in figure 1
shows that the silver nanoparticles were homogeneously
dispersed in polyimide matrix (Figure 1).
0B[1] Lewis, L.N. Chemical Review 93: 2693-2730 (1993).
[2] Huang, J.C., Qian, X.F., Yin, J., Zhu, Z.K. and Xu, H.J.
Materials Chemistry and Physics 69: 172-175 (2001).
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[4] Henglein, A. Chemical Review 89: 1861-1873 (1989)
[5] Kobayashi, T. and Iwaki, M. Surface and Coatings
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6th Nanoscience and Nanotechnology Conference, zmir, 2010 721