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Orczykowski W, Bieliński DM, Anyszka R, Gozdek T, Klajn K, Celichowski G, Pędzich Z, Wojteczko A. Fly Ash from Lignite Combustion as a Filler for Rubber Mixes-Part II: Chemical Valorisation of Fly Ash. MATERIALS (BASEL, SWITZERLAND) 2022; 15:5979. [PMID: 36079361 PMCID: PMC9456590 DOI: 10.3390/ma15175979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 08/23/2022] [Accepted: 08/24/2022] [Indexed: 06/15/2023]
Abstract
Fly ash (FA) fractions with a particle size of 63 µm < FA < 250 µm obtained by sieve fractionation were used as a partial carbon black (CB) replacement in a rubber mixture based on styrene-butadiene rubber (SBR). In order to improve the interactions at the interface between rubber and fractionated ash, at the stage of preparing the rubber mixtures, two different vinyl silanes were added to the system: Vinyltrimethoxysilane (U-611) or Vinyl-tris (2-methoxy-ethoxy) silane (LUVOMAXX VTMOEO DL50), silane with epoxy groups: 3-(glycidoxypropyl)trimethoxysilane (U-50) or sulfur functionalized silanes: containing sulfide bridges: Bis(triethoxysilylpropyl)polysulfide silane (Si-266) or mercapto groups: Mercaptopropyltrimethoxysilane (Dynaslan MTMO). The conducted research confirmed the effectiveness of silanization with selected functional silanes, from the point of view of improving the processing and operational properties of vulcanizates, in which CB is partially replaced with the finest fractions of fly ash. The silanization generally increased the interaction at the rubber−ash interface, while improving the degree of filler dispersion in the rubber mixture. The results of TGA and FTIR analyses confirmed the presence of silanes chemically bonded to the surface of fly ash particles. SEM tests and determination of the bound rubber (BdR) content show that the introduction of the silanes to the mixture increases the degree of ash dispersion (DI) and the Payne effect, which is the greatest when mercaptosilane was used for modification. The highest increase in torque, which was recorded in the case of rubber mixtures containing sulfur silanes and silane with epoxy groups, may be due to their participation in the vulcanization process, which is confirmed by the results of vulcametric studies. The lowest values of mechanical strength, elongation at break, and the highest hardness of vulcanizates obtained in this case may be the result of the over-crosslinking of the rubber. The addition of sulfur-containing silanes significantly slowed down the vulcanization process, which is particularly visible (up to three times extension of the t90 parameter, compared to mixtures without silane) in the case of Si-266. The addition of silanes, except for Si-266 (with a polysulfide fragment), generally improved the abrasion resistance of vulcanizates. The Dynaslan MTMO silane (with mercapto groups) performs best in this respect. Proper selection of silane for the finest fraction of fly ash in the rubber mixtures tested allows for an increase in the mechanical strength of their vulcanizates from 9.1 to 17 MPa, elongation at break from 290 to 500%, hardness from 68 to 74 °ShA, and reduction in abrasion from 171 to 147 mm3.
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Affiliation(s)
- Wojciech Orczykowski
- BESTGUM POLSKA Ltd., Św. Barbary 3, 97-427 Rogowiec, Poland
- Institute of Polymer & Dye Technology, Lodz University of Technology, Stefanowskiego 16, 90-537 Lodz, Poland
| | - Dariusz M. Bieliński
- Institute of Polymer & Dye Technology, Lodz University of Technology, Stefanowskiego 16, 90-537 Lodz, Poland
| | - Rafał Anyszka
- Institute of Polymer & Dye Technology, Lodz University of Technology, Stefanowskiego 16, 90-537 Lodz, Poland
| | - Tomasz Gozdek
- Institute of Polymer & Dye Technology, Lodz University of Technology, Stefanowskiego 16, 90-537 Lodz, Poland
| | - Katarzyna Klajn
- Institute of Polymer & Dye Technology, Lodz University of Technology, Stefanowskiego 16, 90-537 Lodz, Poland
| | - Grzegorz Celichowski
- Department of Materials Technology and Chemistry, Faculty of Chemistry, University of Lodz, Pomorska 163, 90-236 Lodz, Poland
| | - Zbigniew Pędzich
- Department of Ceramics and Refractories, AGH University of Science and Technology, Mickiewicza 30, 30-059 Cracow, Poland
| | - Agnieszka Wojteczko
- Department of Ceramics and Refractories, AGH University of Science and Technology, Mickiewicza 30, 30-059 Cracow, Poland
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Dowari P, Roy S, Das S, Chowdhuri S, Kushwaha R, Das BK, Ukil A, Das D. Mannose‐decorated composite peptide hydrogel with thixotropic and syneresis properties and its application in treatment of Leishmaniasis. Chem Asian J 2022; 17:e202200550. [DOI: 10.1002/asia.202200550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 07/14/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Payel Dowari
- IIT Guwahati: Indian Institute of Technology Guwahati Chemistry Department of Chemistry, IIT Guwahati, Kamrup 781039 Guwahati INDIA
| | - Shalini Roy
- University of Calcutta Biochemistry 35, Ballygunge Circular Road 700019 Kolkata INDIA
| | - Saurav Das
- IIT Guwahati: Indian Institute of Technology Guwahati Chemistry IIT GUWAHATI 781039 KAMRUP INDIA
| | - Sumit Chowdhuri
- IIT Guwahati: Indian Institute of Technology Guwahati Chemistry Department of Chemistry, IIT Guwahati, Kamrup 781039 Guwahati INDIA
| | - Ritvika Kushwaha
- IIT Guwahati: Indian Institute of Technology Guwahati Chemistry Department of Chemistry, IIT Guwahati, Kamrup 781039 Guwahati INDIA
| | - Basab Kanti Das
- IIT Guwahati: Indian Institute of Technology Guwahati Chemistry Department of Chemistry, IIT Guwahati, Kamrup 781039 Guwahati INDIA
| | - Anindita Ukil
- University of Calcutta Biochemistry 35, Ballygunge Circular Road 700019 Kolkata INDIA
| | - Debapratim Das
- Indian Institute of Technology Guwahati Department of Chemistry IIT Guwahati 781039 Guwahati INDIA
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Filopoulou A, Vlachou S, Boyatzis SC. Fatty Acids and Their Metal Salts: A Review of Their Infrared Spectra in Light of Their Presence in Cultural Heritage. Molecules 2021; 26:6005. [PMID: 34641549 PMCID: PMC8512802 DOI: 10.3390/molecules26196005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 09/27/2021] [Accepted: 09/28/2021] [Indexed: 11/24/2022] Open
Abstract
In a cultural heritage context, fatty acids are usually found as breakdown products of lipid-containing organic remains in archaeological findings, binders in aged oil paintings, and additives in modern art-related materials. They may further interact with the ionic environment transforming into metal soaps, a process that has been recognized as a threat in aged paintings but has received less attention in archaeological objects. The investigation of the above related categories of materials with infrared spectroscopy can provide an overall picture of the organic components' identity and demonstrate their condition and prehistory. The capability of investigating and distinguishing fatty acids and their metal soaps through their rich infrared features, such as the acidic carbonyl, the carboxylate shifts, the variable splits of alkyl chain stretching, bending, twisting, wagging, and rocking vibrations, as well as the hydroxyl peak envelopes and acid dimer bands, allows for their direct detailed characterization. This paper reviews the infrared spectra of selected saturated fatty monoacids and diacids, and their corresponding sodium, calcium, and zinc salts and, supported by newly recorded data, highlights the significance of their spectroscopic features.
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Affiliation(s)
| | | | - Stamatis C. Boyatzis
- Department of Conservation of Antiquities and Works of Art, University of West Attica, 12243 Egaleo, Greece; (A.F.); (S.V.)
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Shukla M, Barick K, Salunke H, Chandra S. Chiral salen - Ni (II) based spherical porous silica as platform for asymmetric transfer hydrogenation reaction and synthesis of potent drug intermediate montekulast. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2020.111367] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Misztalewska-Turkowicz I, Coutelier O, Destarac M. Two Pathways of Thiolactone Incorporation into Polyurethanes and Their One-Pot Double Postfunctionalization. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01779] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Iwona Misztalewska-Turkowicz
- Department of Chemistry, University of Bialystok, K. Ciolkowskiego 1K, 15-245 Bialystok, Poland
- IMRCP, UMR 5623, Université de Toulouse, 118, route de Narbonne, F-31062 Cedex 9 Toulouse, France
| | - Olivier Coutelier
- IMRCP, UMR 5623, Université de Toulouse, 118, route de Narbonne, F-31062 Cedex 9 Toulouse, France
| | - Mathias Destarac
- IMRCP, UMR 5623, Université de Toulouse, 118, route de Narbonne, F-31062 Cedex 9 Toulouse, France
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Bossion A, Olazabal I, Aguirresarobe RH, Marina S, Martín J, Irusta L, Taton D, Sardon H. Synthesis of self-healable waterborne isocyanate-free poly(hydroxyurethane)-based supramolecular networks by ionic interactions. Polym Chem 2019. [DOI: 10.1039/c9py00439d] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A novel synthetic strategy to isocyanate-free supramolecular polyhydroxyurethanes based on ionic interactions is described.
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Affiliation(s)
- Amaury Bossion
- POLYMAT
- University of the Basque Country UPV/EHU
- Joxe Mari Korta Center
- 20018 Donostia-San Sebastian
- Spain
| | - Ion Olazabal
- POLYMAT
- University of the Basque Country UPV/EHU
- Joxe Mari Korta Center
- 20018 Donostia-San Sebastian
- Spain
| | - Robert H. Aguirresarobe
- POLYMAT
- University of the Basque Country UPV/EHU
- Joxe Mari Korta Center
- 20018 Donostia-San Sebastian
- Spain
| | - Sara Marina
- POLYMAT
- University of the Basque Country UPV/EHU
- Joxe Mari Korta Center
- 20018 Donostia-San Sebastian
- Spain
| | - Jaime Martín
- POLYMAT
- University of the Basque Country UPV/EHU
- Joxe Mari Korta Center
- 20018 Donostia-San Sebastian
- Spain
| | - Lourdes Irusta
- POLYMAT
- University of the Basque Country UPV/EHU
- Joxe Mari Korta Center
- 20018 Donostia-San Sebastian
- Spain
| | - Daniel Taton
- Laboratoire de Chimie des Polymères Organiques (LCPO)
- UMR 5629-CNRS-Université de Bordeaux – Institut National Polytechnique de Bordeaux
- 33607 Pessac
- France
| | - Haritz Sardon
- POLYMAT
- University of the Basque Country UPV/EHU
- Joxe Mari Korta Center
- 20018 Donostia-San Sebastian
- Spain
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