Browsing by Author "Krupa, Igor"
Now showing items 41-60 of 68
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Influence of surface modification of carbon nanotubes on interactions with polystyrene-b-polyisoprene-b-polystyrene matrix and its photo-actuation properties
Ilčíková, Markéta; Mosnáček, Jaroslav; Mrlík, Miroslav; Sedláček, Tomáš; Csomorová, Katarína; Czaniková, Klaudia; Krupa, Igor... more authors ... less authors ( John Wiley & Sons, Ltd. , 2014 , Article)The influence of various surface modification of multiwalled carbon nanotubes (MWCNT) on preferential interactions with individual phases of the linear triblock copolymer polystyrene-b-polyisoprene-b-polystyrene (SIS) and ... -
The mechanical and adhesive properties of electrically and thermally conductive polymeric composites based on high density polyethylene filled with nickel powder
Krupa, Igor; Cecen, Volkan; Boudenne, Abderrahim; Prokeš, Jan; Novák, Igor ( Elsevier, Ltd , 2013 , Article)Electrically and thermally conductive composites made using high density polyethylene (HDPE) matrix blended with a special grade of branch-structured nickel particles were studied. Composites with high filler content were ... -
Modification of polyethylene by RF plasma in different/mixture gases
Abusrafa, Aya E.; Habib, Salma; Krupa, Igor; Ouederni, Mabrouk; Popelka, Anton ( MDPI AG , 2019 , Article)Herein, low-density polyethylene (LDPE) films were treated using radio-frequency plasma discharge in the presence of air, nitrogen, oxygen, argon, and their mixtures to introduce new chemical functionalities. The surface ... -
Modified os sepiae of Sepiella inermis as a low cost, sustainable, bio-based adsorbent for the effective remediation of boron from aqueous solution
Bhagyaraj, Sneha; Al-Ghouti, Mohammad A.; Khan, Mariam; Kasak, Peter; Krupa, Igor ( Springer Science and Business Media Deutschland GmbH , 2022 , Article)The occurrence of boron in low concentration is essential; however, a higher concentration of boron source in water has a toxic effect on humans as well as have retard effect on agricultural plant growth. Thus, the affordable ... -
Natural aging of shape stabilized phase change materials based on paraffin wax
Krupa, Igor; Sobolčiak, Patrik; Abdelrazeq, Haneen; Ouederni, Mabrouk; Al-Maadeed, Mariam ( Elsevier Ltd , 2017 , Article)Natural aging of shape-stabilized phase change materials containing linear low density polyethylene (LLDPE), paraffin wax and expanded graphite (EG) in Qatari climate has been studied. It was found that expanded graphite ... -
Novel flexible piezoresistive sensor based on 2D Ti3C2Tx MXene
Sobolciak, Patrik; Sadasivuni, Kishor Kumar; Tanvir, Aisha; Krupa, Igor ( Qatar University Press , 2020 , Poster)Stretchable and wearable strain-sensing devices are appropriate for motion detection, biomedical monitoring, human-machine interaction. These pressure sensors are working based on numerous electrophysical phenomena's such ... -
Perfluoroctylsilane grafted Ti3C2X-based hydrogel liquid marble for controlled movement, self-assembly, light-induced release, and water evaporation system
Popelka, Anton; Padmanabhan, Anjali Cheeramthodi; Elgendy, Ahmed Sedeek; Sobolciak, Patrik; Krupa, Igor; Bin Yousaf, Ammar; Šebesta, Martin; Tkac, Jan; Kasak, Peter... more authors ... less authors ( Elsevier , 2023 , Article)In this study, a stable and highly hydrophobic perfluoroctylsilane grafted Ti3C2X (PFMXene) possessing repeatable and stable photothermal behavior was applied for fabrication of liquid marble (LM) and hydrogel-based LM. ... -
Phase change materials based on high-density polyethylene filled with microencapsulated paraffin wax
Krupa, Igor; Nogellova, Zuzana; Spitalsky, Zdenko; Janigova, Ivica; Boh, Bojana; Sumiga, Bostjan; Kleinova, Angela; Karkri, Mustapha; Almaadeed, Mariam A.... more authors ... less authors ( Elsevier Ltd , 2014 , Article)A modified in situ polymerization microencapsulation procedure for the preparation of microcapsules with paraffin wax cores (43 wt.%) and melamine–formaldehyde resin shells having a uniform size distribution and a spherical ... -
Phase change materials designed from Tetra Pak waste and paraffin wax as unique thermal energy storage systems
Al-Gunaid, Taghreed; Sobolčiak, Patrik; Chriaa, Ibtissem; Karkri, Mustapha; Mrlik, Miroslav; Ilčíková, Markéta; Sedláček, Tomáš; Popelka, Anton; Krupa, Igor... more authors ... less authors ( Elsevier , 2023 , Article)Thermal energy storage systems (TES) based on shape-stabilized phase change materials (SSPCM) designed from recycled Tetra Pak (TP) waste, paraffin wax (PW), and expanded graphite (EG) were investigated in this study. This ... -
Photoimmobilization of zwitterionic polymers on surfaces to reduce cell adhesion
Sobolčiak, Patrik; Popelka, Anton; Mičušík, Matej; Sláviková, Monika; Krupa, Igor; Mosnáček, Jaroslav; Tkáč, Ján; Lacík, Igor; Kasák, Peter... more authors ... less authors ( Academic Press Inc. , 2017 , Article)Simple and robust methods for modifying hydrophobic polymer surfaces with zwitterionic polymers using UV irradiation were developed. Two random zwitterionic copolymers consisting of either carboxybetaine or sulfobetaine ... -
Polymer-Matrix Nanocomposite Membranes For Water Treatment
Moghaddasi, AbdolAli (2019 , Master Thesis)A new generation of advanced fibrous materials with high surface area, large number of pores, high flexibility and adjustable wettability were manufactured from different materials which are viable for many applications ... -
Polymers in optics
Bhagyaraj, Sneha; Oluwafemi, Oluwatobi Samuel; Krupa, Igor ( Elsevier , 2020 , Book chapter)The unique and tunable properties of polymers open up the possibilities for using these materials in numerous applications. Among various peculiar features, the optical properties of polymers and their novel composites, ... -
Preparation and characterization of new electrically conductive composites based on expanded graphite with potential use as remote environmental detectors
Prostredný, Martin; Krupa, Igor; Špitalský , Zdenko ( MDPI AG , 2020 , Article)The presented paper is focused on studying electrically conductive composites based on an elastomeric matrix and expanded graphite as the filler. A potential application as an environmental remote detector was studied. The ... -
Purification of emulsified oily polluted waters with modified melamine foams
Hailan, Sarah; Sobolciak, Patrik; Kasak, Peter; Popelka, Anton; Tong, Yongfeng; Adham, Samer; Krupa, Igor... more authors ... less authors ( Elsevier , 2023 , Article)Oil and gas industry operations produce tremendous amounts of wastewater (produced water; PW). Tertiary treatment of the PW in the final treatment stage is challenging due to the presence of colloids with sizes < 500 nm ... -
Quantifying and reducing concentration polarization in reverse osmosis systems
Bai, Weiliang; Samineni, Laxmicharan; Chirontoni, Progga; Krupa, Igor; Kasak, Peter; Popelka, Anton; Saleh, Navid B.; Kumar, Manish... more authors ... less authors ( Elsevier , 2023 , Article Review)Reverse osmosis (RO) is an efficient water purification technique because of its high selectivity and permeability. During RO operation, rejection of solutes at the membrane surface leads to generation of a concentration ... -
Rational synthesis, characterization, and application of environmentally friendly (polymer–carbon dot) hybrid composite film for fast and efficient UV-assisted Cd2+ removal from water
Jlassi, Khouloud; Eid, Kamel; Sliem, Mostafa H.; Abdullah, Aboubakr M.; Chehimi, Mohamed M.; Krupa, Igor... more authors ... less authors ( Springer , 2020 , Article)Background: Carbon dots (CDs) are of particular interest in numerous applications. However, their efficiency for heavy metal removal from wastewater was not yet reported. Herein, we rationally synthesized CDs from petroleum ... -
Recycling of Tetra Pak for Space and Water Heating by Blending with Phase Change Materials
Nishad, Safna; Krupa, Igor ( Qatar University Press , 2023 , Conference Paper)A rapid rise in demands for thermal comfort in the building sector necessitates higher energy consumption for air conditioning, ventilation, space, and water heating systems. Recently, phase change materials (PCMs) have ... -
Reinforcement of copolyamide membranes for water treatment applications
Sobolciak, Patrik; Tanvir, Aisha; Popelka, Anton; Hassan, Mohamed; Mahmoud, Khaled; Krupa, Igor... more authors ... less authors ( Hamad bin Khalifa University Press (HBKU Press) , 2018 , Conference Paper)Clean water is the key element for all living organisms to sustain life. However, due to the rapid industrialization and large increase in the population, the contamination of water resources is important issue occurred ... -
Relationship between structure, properties and UV/Heat protection behavior of two different types of polyethylene manufactured in Qatar
Gasmi, Soumia (2021 , Professional Masters Project)Accelerated (artificial) weathering and thermal ageing tests were performed to investigate the effectiveness of different UV/HALS formulations in reducing the UV/heat degradation effect for two different low-density ... -
Separation of water/oil emulsions by an electrospun copolyamide mat covered with a 2D Ti3C2Tx MXene
Moghaddasi, AbdolAli; Sobolčiak, Patrik; Popelka, Anton; Krupa, Igor ( MDPI AG , 2020 , Article)Purpose: Copolyamide 6,10 (coPA) electrospun mats were covered with multilayered (ML) and single-layered (SL) MXene (Ti3C2Tx) as a membrane for the separation of water/vegetable oil emulsions. Methods: Prepared membranes ...