Faculty Publications
Permanent URI for this communityhttps://idr.nitk.ac.in/handle/123456789/18736
Publications by NITK Faculty
Browse
237 results
Search Results
Item Green sustainable process for chemical and environmental engineering and science: Supercritical carbon dioxide as green solvent(Elsevier, 2019) Siddique, I.; Asiri, A.M.; Isloor, A.M.Green Sustainable Processes for Chemical and Environmental Engineering and Science: Supercritical Carbon Dioxide as Green Solvent provides an in-depth review on the area of green processes for the industry, focusing on the separation, purification and extraction of medicinal, biological and bioactive compounds utilizing supercritical carbon dioxide as a green solvent and their applications in pharmaceuticals, polymers, leather, paper, water filtration, textiles and more. Chapters explore polymerization, polymer composite production, polymer blending, particle production, microcellular foaming, polymer processing using supercritical carbon dioxide, and a method for the production of micro- and nano-scale particles using supercritical carbon dioxide that focuses on the pharmaceutical industry. A brief introduction and limitations to the practical use of supercritical carbon dioxide as a reaction medium are also discussed, as are the applications of supercritical carbon dioxide in the semiconductor processing industry for wafer processing and its advantages and obstacles. © 2020 Elsevier Inc. All rights reserved.Item Chitosan and its derivatives as potential materials for membrane technology(CRC Press, 2015) Kumar, R.; Isloor, A.M.Chitosan (CS), a biomaterial obtained via alkaline N-deacetylation of chitin, has recently attracted much attention from scientists across the globe. After cellulose, it is the second highest naturally occurring polymer on earth. It shows many excellent biological properties such as nontoxicity, biodegradability, antimicrobial activity, and immunological activity. As a membrane material, it has got excellent film-forming nature and hydrophilic in nature. Although the polymer backbone consists of hydrophilic functional groups, CS is normally insoluble in water and most of the common organic solvents. Chemical modification of CS is the best method to enhance its solubility at neutral pH or in organic solvents. So the obtained derivatives have got vast applications in the biomedical field as well as membrane technology. © 2015 by Taylor & Francis Group, LLC.Item Polysaccharides: A Membrane Material(CRC Press, 2015) Shenvi, S.S.; Isloor, A.M.; A.F., A.F.Natural polysaccharides form a major class of the most extensively used biopolymers for different applications, one of which includes membrane-based separation. The major advantages offered by these materials for membrane-based separation include the following: Hydrophilicity of the polymer owing to the presence of hydroxyl groups present in the glucose units that comprise them Presence of large numbers of other functional groups such as carboxyl, amine, and hydroxyl groups © 2015 by Taylor & Francis Group, LLC.Item Contact Angle Measurements(Elsevier Inc., 2017) Hebbar, R.S.; Isloor, A.M.; A.F., A.F.Contact angle has been an important parameter to determine the wetting ability of the polymer membrane surface. Contact angle has gained interest in surface science in regards to its fundamental aspects and application point of view. This chapter will give an insight into fundamentals of contact angle including the theoretical backgrounds, brief history, and importance of contact angle. The various factors that affect the contact angle measurement will also be discussed. The chapter will also present contact angle hysteresis phenomena, comprising of advancing and receding contact angles along with the manifestations of contact angle hysteresis. The chapter will highlight the various methods and techniques available for the measurement of contact angle along with the comprehensive description of the methods. The chapter also covers the application contact angle on surface characterization, permeation, and antifouling nature of the membrane. © 2017 Elsevier B.V. All rights reserved.Item A review: Desalination by forward osmosis(Elsevier, 2018) Gnani Peer Mohamed, S.I.; Isloor, A.M.; Yuliwati, E.Rapid population growth increases the demand for freshwater. Membrane technology is playing a dynamic role in the production of clean water from seawater and wastewater. The desalination of seawater using forward osmosis (FO) is an emerging technology to produce freshwater, as it is energy efficient than the conventional processes. In recent days, a significant amount of work has been carried out to produce high-performance FO membrane for desalination. In this chapter, usage of different types of membranes for FO desalination application and their performances enhancement by suitable modification has been discussed. © 2019 Elsevier Inc. All rights reserved.Item Carbon-based nanocomposite membranes for water and wastewater purification(Elsevier, 2018) Gnani Peer Mohamed, G.P.S.; Isloor, A.M.; Yuliwati, E.; A.F., A.F.The carbon-based nanocomposite membranes are developing core technology for water and wastewater purification. These materials are broadly used in the fabrication of ultrafiltration (UF), nanofiltration (NF), reverse osmosis (RO) and evolving forward osmosis (FO) nanocomposite membranes as an additive. In this chapter, performance enhancement of nanocomposite membranes using carbon nanotubes (CNTs) and graphene oxide (GO), especially in the field of desalination, dye removal, oil/water separation and natural organic matter removal, is discussed. © 2019 Elsevier Inc. All rights reserved..Item Fundamentals and basics of reverse osmosis(Elsevier Inc., 2019) Gnani Peer Mohamed, G.P.S.; Isloor, A.M.; Farnood, R.This chapter endows an inclusive introduction to the fundamentals and basics of the reverse osmosis (RO) process. It starts from the short history, plants, and theoretical contextual of RO. A concise summary of the recent advances in RO membranes and materials then follows. Lastly, the usage of different types of modules such as spiral wound prepared from flat sheet membranes and hollow fiber membranes used in RO desalination is discussed. © 2020 Elsevier Inc. All rights reserved.Item Reverse osmosis pretreatment techniques, fouling, and control strategies(Elsevier Inc., 2019) Gnani Peer Mohamed, G.P.S.; Isloor, A.M.; Farnood, R.In recent times, many commercial-scale seawater desalination plants have been constructed in water-stressed countries, which are expected to increase in the near future to increase the availability of potable water. In spite of many developments in the desalination technologies, seawater desalination using reverse osmosis (RO) membrane is being considered as the state-of-the-art technology. However, there are also some limitations to the RO membrane desalination such as the unavoidable membrane fouling, which increase the operating cost and transmembrane pressure. Here, we review the potential way to the RO membrane fouling control strategies, which includes the role of advanced materials, surface modification and feed water pretreatment that are emphasized based on the extensive up-to-date literature. © 2020 Elsevier Inc. All rights reserved.Item Investigation of the photoalignment effect of 1, 3, 4-oxadiazoles bearing 2-fluoro-4-methoxy phenyl moiety(2010) Alla, R.A.; Hegde, G.; Isloor, A.M.; Chandrakantha, B.; Shetty, P.; Komitov, L.A new series of 1,3,4-oxadiazole derivatives containing 2-fluoro-4-methoxy moiety were synthesized by refluxing mixture of acid hydrazide 3 with different aromatic carboxylic acid in phosphorous oxychloride. Photoalignment studies were performed on these materials indicating that the position of fluorine plays vital role in promoting planar alignment either parallel or perpendicular to the light polarization direction. © 2010 ITE and SID.Item Blue light emitting materials for organic light emitting diodes: Experimental and simulation study(2012) Ulla, H.; Garudachari, B.; Satyanarayan, M.N.; Umesh, G.; Isloor, A.M.Novel blue light-emitting materials were designed by the substitution at the 4-position of 1,8-naphthalimide with electron-donating phenoxy group. The effect of molecular structure on the photophysical, electronic structure properties of the derivatives was explored by UV-visible absorption spectroscopy, photoluminescence spectroscopy, cyclic voltammetry and quantum chemical calculations. Both UV-visible absorption and emission spectra of derivatives indicate that the emission is in blue region. Electrochemical studies of the molecules revealed that they have low-lying energy levels of the lowest unoccupied molecular orbital (LUMO) and energy levels of the highest occupied molecular orbital (HOMO) indicating that the derivatives possess good electron-transporting or hole-blocking properties. To further reveal the electronic structure and the optical properties, the structural and electronic properties of the synthesized derivatives were calculated. These results indicate that molecules may offer potential as dopants as well as non-doping light-emitting materials with good electron injection capabilities for fabrication of blue organic light-emitting diodes. © 2012 IEEE.