title: L-cysteine-induced fabrication of spherical titania nanoparticles within poly(ether-imide) matrix.
abstract: In the presented study, a new L-cysteine-containing diamine is synthesized and fully characterized and its application for the in situ sol-gel fabrication of poly(ether-imide)/titania nano hybrid materials is investigated. The electron microscopic photographs (TEM, FE-SEM and AFM) of the resulted materials confirm the production of spherical nanoparticles with well dispersion and narrow particle size distribution which is a usual challenge in the sol-gel methods. In addition to the positive effects on the particles morphology, the existence of amino acid containing pendant groups in the structure of polymer chains led to the comprehensive interaction with titania phase. As a result, the improvement in the flexibility of polymer backbone (as one of the most serious difficulties in polyimides processing) is obtained while its thermal stability dose is not sacrificed (confirmed by TGA and DSC techniques).
authors.affiliation: Department of Environmental Engineering, University of Environment, 31746-74761, Karaj, Islamic Republic of Iran, seyedjamali@yahoo.com.
authors.forename: Hojjat
authors.initials: H
authors.lastname: Seyedjamali
authors.forename: Azadeh
authors.initials: A
authors.lastname: Pirisedigh
mesh_terms: D003545:Cysteine / Q000737:chemistry*; D004986:Ether / Q000737:chemistry*; D007094:Imides / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry
chemical_list: D007094:Imides; D011108:Polymers; D004986:Ether; C009495:titanium dioxide; D014025:Titanium; D003545:Cysteine