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        Effect of nanofillers on selectivity of high performance mixed matrix membranes for separating gas mixtures

        Suchhanda Srabanee Swain,Lakshmi Unnikrishnan,Smita Mohanty,Sanjay Kumar Nayak 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.8

        Techniques for separation of gas mixtures obtained from various sources, such as effluents from industries, and biogas, have always fascinated researchers. The advent of mixed matrix membranes (MMMs) has opened up a new window of opportunity for developing membranes coupled with flexibility, processability, and permeability of polymers and selectivity of inorganic nanomaterials. This review is a detailed overview of the effect of various nanofillers on the separation performance of MMMs including the major factors affecting the perm-selectivity and possible solutions for overcoming the emerging challenges. The paper also presents contemporary approaches for cost-effective implementation of MMMs. Methodologies for designing MMMs with improved interfacial morphology to exploit their full potential in tailoring the selectivity efficiency are also discussed in detail. This review can act be a guideline for the future development of high-performance MMMs for industrial applications without compromising long-term separation performance, durability, and stability to processing conditions.

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        Insight into mechanical, thermal, and chemical stability of polysulfone-based membranes for the separation of O2/N2

        Suchhanda Srabanee Swain,Lakshmi Unnikrishnan,Smita Mohanty,Sanjay Kumar Nayak 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.3

        MMMs have opened up a new window in gas separation and purification applications, but the actual viability can be reckoned on the basis of performance achieved in realistic feed conditions. This research highlights the selection of silica-decorated graphene for the first time to prepare nanocomposite membranes. XRD, Raman, and UV validated the existence of different fillers within the host Polysulfone (PSf), while TEM authenticated their distribution. The burst strength and thermal properties were also investigated for the prepared samples. This study also covered a prudent step towards resolving the dominant ingredients, which routinely appraise the stability and durability of the membranes. These indexes are long-term gas permeation stability up to 120 hours coupled with sustainability against hydrothermal and chemical resistance under various conditions similar to real-life gas separation applications. Finally, the report demonstrates that the nanohybrid integrated membrane systems display optimum performance and stability in all the aspects as compared to their parent counterparts: PSf/mSiO2 and PSf/GO.

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