Imaging Science and Photochemistry ›› 2005, Vol. 23 ›› Issue (2): 136-143.DOI: 10.7517/j.issn.1674-0475.2005.02.136

Previous Articles     Next Articles

Structural Design and Synthesis of PMDA-6FHP-DR1/SiO2 Hybrid Nanomaterial

QIU Feng-xian1,2, ZHOU Yu-ming1, LIU Ju-zheng1, ZHANG Xu-ping3   

  1. 1.Department of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096, Jiangsu, P.R.China;
    2. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, P.R.China;
    3. Institute of Optical Communication Engineering, Nanjing University, Nanjing 210093, Jiangsu, P.R.China
  • Received:2004-09-10 Revised:2004-12-27 Online:2005-03-23 Published:2005-03-23

Abstract: The fluorine-containing monomers 2,2-bis (3-amino-4-hydroxy phenyl) hexafluoropropane (6FHP) and pyromellitic dianhydride (PMDA) were used. It is a first-step preparation of a preimided hydroxy-containing polyimide, followed by the covalent bonding of an active chromophore dispered red 1 (DR1) onto the backbone of the polyimide via the Mitsunobu reaction. The fluorine-containing polyimide was synthesized. Then, Sol-Gel technique was adopted, utilizing 3-aminopropyltriethoxysilane (APTES) as a coupling agent, poly (amide acid), containing chromophore and alkoxysilane monomers, was synthesized. Si (OR)3 group was hydrolyzed and condensated. It reacted with Tetraethoxysilane (TEOS) in presence of catalyst, via hybridization and gelation. The hybrid material was obtained with optics transparent, nonlinear optical, high thermal stability. Fluorine-containing polyimides/silica hybrid material was characterized by the methods of FT-IR spectra, Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM), X-Ray Diffraction (XRD), Differential Scanning Calorimetry (DSC) measuring apparatus to get their surface structure, morphology, thermal performance.

Key words: polyimide, Sol-Gel process, pyromellitic dianhydride (PMDA), coupling agent

CLC Number: