Novel poly(imide-ether)s based on xanthene and a corresponding composite reinforced with a GO grafted hyperbranched polymer: fabrication, characterization, and thermal, photophysical, antibacterial and chromium adsorption properties

• Published in: New journal of chemistry 2020-10, Vol.44 (4), p.17346-17359
• Main Authors: Khaki, Diyari, Amininasab, S. Mojtaba, Namazi, Hassan
• Format: Article
• Language: English
• Subjects: Ambient temperature; Aqueous solutions; Aramid fibers; Chemical analysis; Chromium; Diamines; Dianhydrides; Fluorescence; Glass transition temperature; Infrared analysis; Nanocomposites; Nanoparticles; NMR; Nuclear magnetic resonance; Photoluminescence; Polyamide resins; Polycondensation reactions; Polyimide resins; Temperature; Thermal stability; Thermodynamic properties; Weight loss
• ISSN: 1144-0546; 1369-9261
• DOI: 10.1039/d0nj03126g

High-performance polyimides (PIs) with ether linkages and trifluoromethyl (-CF 3 ) groups based on xanthene were designed and synthesized via a polycondensation reaction of novel diamine monomers with available aromatic dianhydrides. The structure of the synthesized compounds was confirmed by the 1 H-NMR, FT-IR and elemental analysis techniques, and their photophysical attributes were studied by UV-vis and fluorescence spectroscopy. All the PIs demonstrated excellent thermal stability, glass transition temperatures ( T g ) from 249 to 263 °C, char yields of greater than 37.9%, and 10% weight loss temperatures in a nitrogen atmosphere from 430 to 508 °C. Also, the inherent viscosities of the resulting polymers were in the range of 0.49-0.66 dL g −1 . The PIs were completely soluble in polar amide-type organic solvents (NMP, DMAc, DMSO, and DMF) at ambient temperature. A polymeric nanocomposite ( PI-a2/GO-HBP NC) was prepared by linking a polyimide ( PI-a2 ) and hyperbranched aromatic polyamide-coated GO nanoparticles ( GO-HBP NPs). The thermal stability, photoluminescence intensity, and antibacterial properties of the nanocomposite are higher than the neat polyimide due to powerful chemical links between the GO-HBP and PI-a2 chains. Also, all components were applied as efficient adsorbents for the elimination of chromium metal ions from aqueous solutions. High-performance polyimides (PIs) with ether linkages and trifluoromethyl (-CF 3 ) groups based on xanthene were designed and synthesized via a polycondensation reaction of novel diamine monomers with available aromatic dianhydrides.