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Mixed matrix membranes (MMMs) comprising polysulfone (PSF) Udel® P-1700 and 30 wt% carbon molecular sieve (CMS) particles (<25 μm) have been fabricated and characterized. CMS particles were treated in poly(vinyl pyrrolidone) kollidone 15 (PVP K-15) sizing bath solution (1–10 wt% in isopropanol) prior to embedment into the matrix solution to improve matrix–sieve interfacial adhesion. This study investigated the effects of CMS sizing with PVP K-15 on the morphology and the gas separation performance of PSF–CMS MMMs. The fabricated MMMs were characterized using TGA, DSC, FESEM, ATR-FTIR and single gas permeation test using high purity O2 and N2. A dramatic improvement in CMS–PSF adhesion was observed using FESEM micrographs upon incorporation of PVP K-15-sized CMS particles. ATR-FTIR results suggest the occurrence of intermolecular interaction between PVP K-15 sizing layer on the outer surface of CMS particles and PSF matrix. A substantial recovery of separation performance was achieved whereby the PSF–PVP-sized CMS MMM exhibited 1.7 times higher O2/N2 selectivity compared to that of unmodified MMM. 相似文献
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Wan Mohamad Ikhmal Wan Mohamad Kamaruzzaman Maria Fazira Mohd Fekeri Nursabrina Amirah Mohd Nasir Nur Aiman Syafiq Mohd Hamidi Mohamad Zahid Baharom Azila Adnan Muhamad Syaizwadi Shaifudin Wan Rafizah Wan Abdullah Wan Mohd Norsani Wan Nik Fariza Hanim Suhailin Khamirul Amin Matori Chen Soo Kien Mohd Hafiz Mohd Zaid Mohd Sabri Mohd Ghazali 《Molecules (Basel, Switzerland)》2021,26(11)
With the trend for green technology, the study focused on utilizing a forgotten herb to produce an eco-friendly coating. Andrographis paniculata or the kalmegh leaves extract (KLE) has been investigated for its abilities in retarding the corrosion process due to its excellent anti-oxidative and antimicrobial properties. Here, KLE was employed as a novel additive in coatings and formulations were made by varying its wt%: 0, 3, 6, 9, and 12. These were applied to stainless steel 316L immersed in seawater for up to 50 days. The samples were characterized and analyzed to measure effectiveness of inhibition of corrosion and microbial growth. The best concentration was revealed to be 6 wt% KLE; it exhibited the highest performance in improving the ionic resistance of the coating and reducing the growth of bacteria. 相似文献
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