Esmaeilzade, B and Esmaielzadeh, S and Ahmadizadegan, H (2018) Ultrasonic irradiation to modify the functionalized bionanocomposite in sulfonated polybenzimidazole membrane for fuel cells applications and antibacterial activity. Ultrasonics Sonochemistry, 42. pp. 260-270.
Full text not available from this repository.Abstract
In this article the new proton exchange membranes were prepared from sulfonated polybenzimidazole (s-PBI) and various amounts of sulfonated titania/cellulose nanohybrids (titania/cellulose-SO3H) via ultrasonic waves. The ultrasonic irradiation effectively changes the rheology and the glass transition temperature and the crystallinity of the composite polymer. Ultrasonic irradiation has a very strong mixing and dispersion effect, much stronger than conventional stirring, which can improve the dispersion of titania/cellulose-SO3H nanoparticles in the polymer matrix. The strong –SO3H/–SO3H interaction between s-PBI chains and titania/cellulose-SO3H hybrids leads to ionic cross-linking in the membrane structure, which increases both the thermal stability and methanol resistance of the membranes. After acid doping with phosphoric acid, s-PBI/titania/cellulose-SO3H nanocomposite membranes exhibit depressions on methanol permeability and enhancements on proton conductivity comparing to the pristine s-PBI membrane. The chemical structure of the functionlized titania was characterized with FTIR, and energy-dispersive X-ray. Imidazole and sulfonated groups on the surface of modified nanoparticles forming linkages with s-PBI chains, improved the compatibility between s-PBI and nanoparticles, and enhanced the mechanical strength of the prepared nanocomposite membranes. From SEM and TEM analysis could explain the homogeneous dispersion of titania/cellulose-SO3H in nanocomposite membranes. Moreover, the membranes exhibited excellent antibacterial activities against S. aureus and E. coli
| Item Type: | Article |
|---|---|
| Subjects: | QS Human Anatomy |
| Divisions: | Faculty of Medicin > Department of Anatomy |
| Depositing User: | محسن زارعی |
| Date Deposited: | 04 Jul 2018 05:26 |
| Last Modified: | 04 Jul 2018 05:26 |
| URI: | http://eprints.bpums.ac.ir/id/eprint/6985 |
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