کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
637938 1456155 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of precursor properties on the preparation of polyethylene hollow fiber membranes by stretching
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Effects of precursor properties on the preparation of polyethylene hollow fiber membranes by stretching
چکیده انگلیسی

High-density polyethylene (HDPE) hollow fiber membranes were prepared by stretching the melt spun hollow fiber precursors. Slit-shaped pores were successfully developed by cold and hot stretching processes. Annealing before stretching had a great influence on the precursor properties such as orientation, crystallite size and crystallinity. These property changes directly affected the membrane structure, and stretching without annealing failed to make a microporous structure. Take-up speed affected the lamellar thickness and interlamellar amorphous domain size, which in turn determined the pore size. Installation of an air-cooling unit determined the cooling time for crystallization for various take-up speeds. A decrease of cooling time prohibited an increase in orientation, and caused the decrease of crystallite size and crystallinity of the precursor. Take-up speed and annealing conditions were optimized for proper structure formation by stretching.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 318, Issues 1–2, 20 June 2008, Pages 201–209
نویسندگان
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