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

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P P Poster Session, Thursday, June 17 Theme F686 - N1123 Synthesis and Properties of Photosensitive Polyimide–Titania Nanocomposite Thin Films 1 2 1 Süleyman KöytepeP P, H. brahim AdgüzelP P, UTurgay SeçkinUP P* 1 PDepartment of Chemistry, University of Inonu, Malatya, TR Türkiye 44280 2 PDepartment of TPhysicsT, University of Inonu, Malatya, TR Türkiye 44280 Abstract-In this study, synthesis, morphology, and properties of high refractive index photosensitive polyimide–titania hybrid materials are reported. Soluble polyimides with acyridine orange groups (PI 1-5) was first synthesized from 3,6-bis(dimethylamino)acridine and five various dianhydride. The titania domain size in the hybrid materials analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD) was around 40–100 nm. The prepared optically transparent films had tunable refractive index (1.583
Poster Session, Thursday, June 17 Theme F686 - N1123 Synthesis of Noncarbon Nanotubes/ conductive Polymer nanocomposite in free solvent media G.R. Kiani 1* and A. Rostami 2 1 Department of Applied Chemistry, Faculty of Science, University of Maragheh, Maragheh, Iran 2 School of engineering, emerging technologies, University of Tabriz, Tabriz, Iran Abstract- Conducting polymer/ halloysite nanotubes composite were obtained by a mechanochemical reaction in the solid state by milling system. The halloysite nanotubes(HNT) were coated with 2, 5- dithienyl pyrrole(SNS) via the in situ chemical oxidation polymerization. The characterization by transmission electron microscopy showed that the nanotubes were completely covered with conducting polymer. The nanocomposite was characterized using FTIR, X-ray diffraction, TGA and transmission electron microscopy. The conductivity of the nanocomposite was found to be 0.0066 (cm) -1 . (HNT) provide a new avenue for the preparation of nanocomposites. Conducting polymer nanotubes have recently become the object of numerous investigations because of their great potential in device applications, such as transistors [1], sensors [2], actuators and batteries [3], and so on. Holloysite has a wide variety of biological and non-biological applications. It has been used for storing molecular hydrogen [4], for catalyst conversions and processing of hydrocarbons [5] and for removing environmental hazardous species [6]. HNT and SNS in the presence of ammonium presulphate were placed in the ball milling apparatus and the mixture was milled for 30 minute at room temperature (25 Hz). The black powder of HNT-SNS nanocomposite was washed with water, and ethanol, then the dried in vacuum. TEM images of halloysite nanotubes (HNT) and HNT-SNS show that the halloysite nanotubes were coated with 2, 5- dithienyl pyrrole(SNS) via the in situ chemical oxidation polymerization. Also it is obvious that the poly SNS layer with the thickness of about 40 nm was only coated onto the outer surfaces of the HNTs. Figure2: FT-IR spectras of a) HNT b) HNT-SNS nanocomposite The conductivity of the HNT-SNS nanocomposite was found to be 0.0066 (cm) -1 and the conductivity value was acceptable. Figure1: TEM images of a) HNT b) HNT-SNS nanocomposite. Figure 2 shows the IR spectra of HNT, HNT-SNS product. The bands at 790 and 750 cm 1 in the HNT spectrum are assigned to the translational vibrations of the external OH groups as well as the out-of-plane OH bending according to the literature. Also the bands in 1600 and 3500 cm -1 for SNS in Fig 2b shows C=C and N-H respectively. Fig. 3 shows the XRD for the HNT and nanocomposite. It is obvious that the SNS has an amorphous structure so that it appears in 15-35 (2) in the nanocomposite structure. Figure 3: X-ray diffractograms of HNT and HNT-SNS. In summary, HNT/ conducting polymer nanocomposite were synthesized first time using milling system and its characteristics were determined. The halloysite nanotubes offer an alternative to carbon nanotubes due to their viability and low cost. *Corresponding author: kiani1348@gmail.com and kiani_gholamreza@yahoo.com [1] A.N. Aleshin, Adv. Mater. 18, 17 (2006). [2] M. Kanungo, A. Kumar and A.Q. Contractor, Anal. Chem. 758, 5673 (2003). [3] R.H. Baughman, Science 308, 63 (2005). [4] X. Wang and M. L. Weiner US Patent Specification 0233199 (2005) [5] R. Klimkiewicz and B. D. Edwarda J. Phys. Chem. Solids 65 459 (2004). [6] Z. Lin and R. W. Puls Environ. Geol. 39 753(2000). 6th Nanoscience and Nanotechnology Conference, zmir, 2010 720
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Third Day Poster Session, 17 June 2010 - NanoTR-VI

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