کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4989351 | 1455977 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Degradation reduction of polybenzimidazole membrane blended with CeO2 as a regenerative free radical scavenger
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Degradation reduction of polybenzimidazole membrane blended with CeO2 as a regenerative free radical scavenger Degradation reduction of polybenzimidazole membrane blended with CeO2 as a regenerative free radical scavenger](/preview/png/4989351.png)
چکیده انگلیسی
Ceria nanoparticles were added to PBI membranes as free-radical scavengers to minimize the degradation of the polymer bulk. The 7 nm Ceria nanoparticles were synthesized by combustion synthesis and the crystal structure was characterized by X-ray powder diffraction (XRD) and TEM. The oxidative degradation of PBI and PBI-CeO2 membranes was studied under the Fenton test conditions by the weight loss, FTIR and XPS. It was revealed that adding CeO2 as free-radical scavengers greatly improved the chemical stability of the membrane and the degradation occurred at the carbon atom of the benzene ring resulting in the hydrolysis of the C-N/CN bonds. Besides, ex-situ membrane characterization and in-situ durability test revealed that PBI-CeO2-2% membrane exhibited excellent mechanical properties and high proton conductivity of 0.048 S cmâ1 at 150 °C and the MEA remained stable during 250 h stability test under a constant current discharge of 200 mA cmâ2. A conclusion is made that PBI membranes blended with a free radical scavenger is a promising approach to enhance the chemical stability for high temperature PEMFC application.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 522, 15 January 2017, Pages 23-30
Journal: Journal of Membrane Science - Volume 522, 15 January 2017, Pages 23-30
نویسندگان
Jinkai Hao, Yongyi Jiang, Xueqiang Gao, Feng Xie, Zhigang Shao, Baolian Yi,