کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
633191 1456024 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Towards integrated anti-microbial capabilities: Novel bio-fouling resistant membranes by high velocity embedment of silver particles
ترجمه فارسی عنوان
به سوی قابلیت های یکپارچه ضد میکروبی: غشاهای مقاوم در برابر زیستی جدید با جابجایی سریع ذرات نقره
کلمات کلیدی
سطح ضد فساد، ذرات اسپری ذرات، فعالیت ضد میکروبی، غشاهای هیبرید
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
چکیده انگلیسی


• The cold-spray technology system used to embed silver particles across membranes.
• Amount of silver controlled by adjusting the pass speed and feeding spray density.
• The particle embedment across the membranes is shown to be mechanically stable.
• The membranes offer excellent anti-biofouling properties.

Biofilm formation on membranes during water desalination operation and pre-treatments limits performance and causes premature membrane degradation. Here, we apply a novel surface modification technique to incorporate anti-microbial metal particles into the outer layer of four types of commercial polymeric membranes by cold spray. The particles are anchored on the membrane surface by partial embedment within the polymer matrix. Although clear differences in particle surface loadings and response to the cold spray were shown by SEM, the hybrid micro-filtration and ultra-filtration membranes were found to exhibit excellent anti-bacterial properties. Poly(sulfone) ultra-filtration membranes were used as for cross-flow filtration of Escherichia coli bacteria solutions to investigate the impact of the cold spray on the material׳s integrity. The membranes were characterized by SEM–EDS, FT-IR and TGA and challenged in filtration tests. No bacteria passed through the membrane and filtrate water quality was good, indicating the membranes remained intact. No intact bacteria were found on hybrid membranes, loaded with up to 15 wt% silver, indicating the treatment was lysing bacteria on contact. However, permeation of the hybrid membranes was found to be reduced compared to control non-modified poly(sulfone) membranes due to the presence of the particles across the membrane material. The implementation of cold spray technology for the modification of commercial membrane products could lead to significant operational savings in the field of desalination and water pre-treatments.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 475, 1 February 2015, Pages 552–561
نویسندگان
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