کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1284255 1497986 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Improving proton conductivity of sulfonated poly (ether ether ketone) proton exchange membranes at low humidity by semi-interpenetrating polymer networks preparation
ترجمه فارسی عنوان
بهبود رسانایی پروتون از غشاهای تبادل پروتون های سولفونیک شده پلی (اتر اتر کتون) در رطوبت کم با تهیه شبکه های نیمه متقاطع پلیمر
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی


• Proton conductivity at low RH is improved by interpenetrating CrPSSA into SPEEK PEM.
• At RH 25% proton conductivity of SPEEK/CrPSSA 40 reaches 10−3 S cm−1.
• Percolation thresholds of around 0.2 indicate elongated clusters in sIPN membranes.
• It is easy for elongated clusters to swell and interconnect at low RH.
• The sIPN membranes exhibit good miscibility and can be stable up to 250 °C in N2.

Crosslinked poly (styrene sulfonic acid) (CrPSSA) is incorporated into sulfonated poly (ether ether ketone) (SPEEK) through the semi-interpenetrating polymer networks (sIPNs) method to improve proton conductivity of SPEEK proton exchange membranes (PEMs) at low relative humidity (RH). Thermogravimetric analysis indicates that the SPEEK/CrPSSA sIPN membrane can be stable up to 250 °C in N2. A single glass transition temperature (Tg) of the sIPN measured by differential scanning calorimetric measurements suggests good miscibility of the CrPSSA and SPEEK. At fixed RH the proton conductivity of the sIPN membranes increases as more CrPSSA is incorporated into SPEEK membranes. The sIPN membrane with 40 wt. % CrPSSA has a proton conductivity of 10−3 S cm−1 at 25% RH, which comparable to that of Nafion115 and is 2 orders of magnitude higher than that of the pristine SPEEK membranes (10−5 S cm−1 at RH 50%). The percolation threshold for proton conduction occurs at lower hydrophilic volume fractions with the increasing content of CrPSSA, suggesting different packing behavior of –SO3H groups in the SPEEK/CrPSSA sIPN membranes as compared with SPEEK and Nafion® membranes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 246, 15 January 2014, Pages 482–490
نویسندگان
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