Polyimide based super-wettable membranes/materials for high performance oil/water mixture and emulsion separation: A review

This article reviews the application of highly heat and pressure resistant polyimide material for the development of membranes/materials that exhibit unique super-wettability, the characteristics pivotal for the efficient separation of oil-water mixture and emulsion. The polymerization of imide monomer in polyimide brings about the required porosity in the material, which in turn renders the crucial surface roughness, which is instrumental for establishing the desired super-wettability on the polyimide based membrane materials, in addition to the mechanical and thermal robustness. The membrane as the oil-water filtering medium can be either oil passing or water passing depends on the individual wettability of the membrane surface for oil and water, which in turn depend on the respective solid-liquid interfacial energy and the hierarchical surface roughness. Superhydrophobic/superoleophobic wetting characteristic of the surface repels water and allows oil to pass through the membrane medium, and the major disadvantage of this kind of oil/water separation is the rapid oil fouling of the membrane pores and the consequent less efficiency for oil water separation. On the other hand, the membrane surface engineered to have the Superhydrophilic/underwater superoleophobic wetting characteristics can be water passing, and the easy fouling of the membrane surface can be minimized. In the case of polyimide materials, there are lot of scopes to engineer the physical properties like surfa...
Source: Advances in Colloid and Interface Science - Category: Chemistry Authors: Source Type: research

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ConclusionThis pilot study establishes short-term efficacy and safety of mirabegron in valve bladder with overactivity. Further larger long-term studies are warranted.
Source: Pediatric Surgery International - Category: Surgery Source Type: research
In this study, the authors synthesize a triphenylamine-based anionic CPE (TPAFS-TMA) as an HTL for p-i-n-type PeSCs. TPAFS-TMA has appropriate frontier molecular orbital (FMO) levels similar to those of the commonly used poly(bis(4-phenyl)-2,4,6-trimethy lphenylamine) (PTAA) HTL. The ionic and semiconducting TPAFS-TMA shows high compatibility, high transmittance, appropriate FMO energy levels for hole extraction and electron blocking, as well as defect passivating properties, which are confirmed using various optical and electrical analyses. Thus, t he PeSC with the TPAFS-TMA HTL exhibits the best power conversion efficien...
Source: Small - Category: Nanotechnology Authors: Tags: Research Article Source Type: research
ACS NanoDOI: 10.1021/acsnano.1c07512
Source: ACS Nano - Category: Nanotechnology Authors: Source Type: research
During metamorphosis, the wings of a butterfly sprout hundreds of thousands of scales with intricate microstructures and nano-structures that determine the wings’ optical appearance, wetting characteristics, thermodynamic properties, and aerodynamic behavior. Although the functional characteristics of scales are well known and prove desirable in various applications, the dynamic processes and...
Source: Proceedings of the National Academy of Sciences - Category: Science Authors: Tags: Applied Biological Sciences Source Type: research
Cryobiology. 2021 Nov 25:S0011-2240(21)00354-0. doi: 10.1016/j.cryobiol.2021.11.179. Online ahead of print.ABSTRACTCryopreservation is a widely used long-term preservation method to ensure the quality and vitality of microbes in laboratories and biological resource facilities. However, freeze-thaw damage and osmotic pressure changes during cryopreservation adversely impacts microbial survival. Significant expenditure of resources and expertise are required to select the right cryoprotectant and optimize its concentration for maximum survival of diverse microorganisms. This work describes a cryopreservation method that obvi...
Source: Cryobiology - Category: Biology Authors: Source Type: research
Haematologica. 2021 Nov 25. doi: 10.3324/haematol.2021.279948. Online ahead of print.ABSTRACTVon Willebrand Factor (VWF) and Factor VIII (FVIII) circulate in a noncovalent complex in blood and promote primary haemostasis and clotting respectively. A new VWF A1-domain binding aptamer, BT200, demonstrated good subcutaneous bioavailability and a long half-life in non-human primates. This first-in-human, randomised, placebo-controlled, double-blind trial tested the hypothesis that BT200 is well tolerated and has favourable pharmacokinetic and pharmacodynamic effects in 112 volunteers. Participants received one of the following...
Source: Haematologica - Category: Hematology Authors: Source Type: research
Conclusion: OSA is the main reason for women visiting sleep unit. Their symptoms are differentiated when asked by the doctor compared to self -report and also according to age and OSA severity.
Source: European Respiratory Journal - Category: Respiratory Medicine Authors: Tags: Sleep and control of breathing Source Type: research
Soft Matter, 2021, Advance Article DOI: 10.1039/D1SM01334C, PaperP. V. Dolganov, A. S. Zverev, K. D. Baklanova, V. K. Dolganov Different coalescence regimes are observed for isotropic droplets in a nematic environment and nematic droplets in an isotropic environment in flat cells. Wetting conditions on the cell surfaces play a key role in the development of instabilities. To cite this article before page numbers are assigned, use the DOI form of citation above. The content of this RSS Feed (c) The Royal Society of Chemistry
Source: RSC - Soft Matter latest articles - Category: Chemistry Authors: Source Type: research
CONCLUSIONS: Release of VWF from endothelial cells opens the platelet-binding site, irrespective of the presence of flow. However, not all available platelet-binding sites are being occupied, suggesting some extent of regulation. Part of this regulation involves endothelial proteins that are co-secreted with VWF, like osteoprotegerin. This regulatory mechanism may be of more relevance under inflammatory conditions.PMID:34816579 | DOI:10.1111/jth.15598
Source: Thrombosis and Haemostasis - Category: Hematology Authors: Source Type: research
Conclusion: Our study revealed definite and significant presence of sleep problems in the children of South Kanara. Strong associations were observed between certain sleep practices and problems.
Source: Journal of Indian Society of Pedodontics and Preventive Dentistry - Category: Dentistry Authors: Source Type: research
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