کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4988584 | 1455954 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
1,2,4-Triazole functionalized poly(arylene ether ketone) for high temperature proton exchange membrane with enhanced oxidative stability
ترجمه فارسی عنوان
1،2،4-تریازول عامل پلی (آریلن اتر کتون) برای غلظت تبادل پروتون با درجه حرارت بالا با پایداری اکسیداتیو
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کلمات کلیدی
غشاء تبادل پروتون با درجه حرارت بالا، تریازول، پلی (آرویلن اتر کتون)، اسید فسفریک،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
چکیده انگلیسی
A series of novel 1,2,4-triazole grafted poly(arylene ether ketone) membranes were prepared to absorb phosphoric acid and used as high temperature proton exchange membranes. Poly(arylene ether ketone) is firstly bromomethylated, followed by nucleophilic substitution of bromomethylated poly(arylene ether ketone) with 3-mercapto-1,2,4-triazole. The structure and the degree of substitution were confirmed by their 1H NMR spectra. 1,2,4-Triazole functionalized poly(arylene ether ketone) membranes exhibited high thermal decomposition temperature (Td(5%) higher than 271 °C) and tensile strengths (higher than 78 MPa). After doping with phosphoric acid, these membranes showed enhanced abilities to phosphoric acid absorption with increasing the amount of triazole groups on the side chains. Phosphoric acid doped MTZPAEK(2.15) showed the highest Wdoping value of 142% and the proton conductivity of 51 mS cmâ1 at 190 °C. Remarkably, all the membranes exhibited great oxidative stabilities and could retain their shapes for more than 50 h in Fenton's reagent (3 wt% H2O2, 4 ppm Fe2+) at 80 °C. This advantage could be ascribed to the unique sulfide groups, which were introduced by nucleophilic substitution reaction and acted as free radical scavengers. The supposed mechanism of enhancing oxidative stability by sulfide groups was confirmed via FT-IR.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 545, 1 January 2018, Pages 167-175
Journal: Journal of Membrane Science - Volume 545, 1 January 2018, Pages 167-175
نویسندگان
Fanzhe Bu, Yurong Zhang, Lihua Hong, Wanchen Zhao, Di Li, Jialin Li, Hui Na, Chengji Zhao,