کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
636524 | 1456128 | 2010 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of polyethersulfone/polyimide blend membranes prepared by a dry/wet phase inversion: Precipitation kinetics, morphology and gas separation
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کلمات کلیدی
DMFN-methyl-2-pyrrolidinoneMatrimidNMPTGAPESP/L - P / LSTP - PTSstandard temperature and pressure - دما و فشار استانداردdimethylformamide - دی متیل فرمالیدCompatibility - سازگاریDiffusion coefficient - ضریب انتشارDense layer - لایه انبوهSEM - مدل معادلات ساختاری / میکروسکوپ الکترونی روبشیMacrovoid - مکرووییدscanning electron microscope - میکروسکوپ الکترونی اسکنPermeance - نفوذپذیریGPU - واحد پردازش گرافیکیPES, Polyethersulfone - پلی اتر سولفونPolyimide - پلی ایمید
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Flat sheet gas separation membranes of polyethersulfone (PES), polyimide (Matrimid, MI) and their blends were fabricated by a spin casting method followed by a dry/wet induced phase inversion process. The mixing compatibility and thermal stability of the blend membrane were studied by Fourier transform infrared spectroscopy (FTIR) and thermal gravimetric analysis (TGA) respectively. The forming behavior was investigated by the ternary phase diagram and an optical microscope with PES, MI and PES/MI blend (5:5). In this ternary system, the average of diffusion coefficient, De, of PES, MI and EM5050 were respectively 8.35 Ã 10â5, 10.22 Ã 10â5 and 3.09 Ã 10â5 cm2/s. The morphology of membranes was studied by a scanning electron microscope (SEM). All prepared membranes had an ultrathin dense skin layer (<1 μm) on the top of the membrane. The blend membrane with MI composition from 40 to 80 wt.% showed sponge-like sub-layer whereas pristine membrane as well as the rest of the composition showed the finger-like sub-layer (macrovoids). Gas permeance of N2, increased with increase in feed pressure irrespective of blend composition. The permselectivity of PES/MI (30/70 wt.%) decreased from 5.4 to 4.9 with increase in the feed pressure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 351, Issues 1â2, 1 April 2010, Pages 141-148
Journal: Journal of Membrane Science - Volume 351, Issues 1â2, 1 April 2010, Pages 141-148
نویسندگان
Junyoung Han, Wonseok Lee, Jae Min Choi, Rajkumar Patel, Byoung-Ryul Min,