کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5201720 1502904 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Degradation of silicone rubbers with different hardness in various aqueous solutions
ترجمه فارسی عنوان
تجزیه رب های سیلیکونی با سختی متفاوت در محلول های مختلف آب
کلمات کلیدی
سلول سوختی غشای تبادل پروتون، لاستیک سیلیکون، واشر، تنزل، تجزیه شیمیایی،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی

Durability is one of the remaining challenges for practical application of proton exchange membrane fuel cells. Seals or gaskets around perimeters of each cell in a fuel cell stack are important to prevent leakage of reactant gases, avoiding the decay in utilization of gases and in overall cell performance. In this study, degradation of silicone rubbers, often used as sealing material in fuel cells, with different hardness in various aqueous solutions is investigated. Although the weight loss increases with the increase in hardness, the durability seems enhanced with the increase in hardness, as revealed by the variation of surface morphology and mechanical properties of silicone rubbers before and after exposure to acidic aqueous solutions. It also turns out that the degradation of silicone rubbers can be catalyzed by protons, leading to severe corrosion of materials in strong acidic environment. The results described in this study may provide guidance to evaluation or selection of silicone rubbers as seals for PEMFC applications.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 109, November 2014, Pages 122-128
نویسندگان
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