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Alhazime AA, Barakat MME, Bahareth RA, Mahrous EM, Aldawood S, El Aal SA, Nouh SA. Gamma induced changes in Makrofol/CdSe nanocomposite films. CHINESE PHYSICS B 2022; 31:097802. [DOI: 10.1088/1674-1056/ac4909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
We applied an ex-situ casting procedure to prepare a nanocomposite (NCP) from Makrofol polycarbonate (PC) and CdSe nanoparticles. The CdSe nanoparticles were prepared by a thermolysis procedure in the presence of N2 gas flow. Rietveld refinement of x-ray data illustrated that the CdSe adopts a cubic zinc blend structure of 6.057 Å lattice parameter and 2 nm typical grain size. Samples from the prepared NCP were exposed to γ dosages (20 kGy–250 kGy). The modifications induced in the NCP films owing to γ dosages have been studied. The γ irradiation (50 kGy–250 kGy) causes crosslinks that reduce the optical bandgap from 4.15 eV to 3.81 eV, associated with an increase in dielectric parameters and refractive index. This is attributed to an increase in the mass fraction of the disordered regions as specified by x-ray diffraction. The PC–CdSe NCP was found to have a reaction to color modification which makes it suitable for saleable reproduction on a printing press.
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Gharbi F, Benthami K, Alsheddi TH, Barakat MME, Alnaim N, Alshoaibi A, Nouh SA. Structural, Thermal, and Optical Studies of Gamma Irradiated Polyvinyl Alcohol-, Lignosulfonate-, and Palladium Nanocomposite Film. Polymers (Basel) 2022; 14:polym14132613. [PMID: 35808659 PMCID: PMC9269231 DOI: 10.3390/polym14132613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/08/2022] [Accepted: 06/14/2022] [Indexed: 11/16/2022] Open
Abstract
Nanocomposite (NC) films of polyvinyl alcohol (PVA), lignosulfonate (Lg), and nanosized palladium (Pd) were synthesized by ex-situ casting method. Samples from the synthesized PVA-Lg/Pd NC films were irradiated with 5–100 kGy γ doses. The effect of γ doses on the structural, thermal, and optical characteristics of the NC films were studied using different characterization techniques. The results indicated that the γ irradiation improves the decomposition temperature from 227 to 239 °C, signifying an increase in the thermal stability of the NC films. This was accompanied by a reduction of the melting temperature due to the increase of the amorphous phase. This can be attributed to the dominance of crosslinking. On the other hand, the refractive index increased from 2.21 to 2.32 while increasing the γ dose up to 100 kGy. This was associated with a reduction of the optical bandgap from 3.49 to 3.30 eV, which could be attributed to the increase in the amorphous phase as a result of crosslinking. This indicates an enhancement of the spreading of the NPs inside the blend matrix due to γ irradiation. This results in a more compacted construction of the PVA-Lg/Pd NC films. Furthermore, we used the Commission Internationale de E’Claire (CIE) method to estimate the change in color among the irradiated NC films and the pristine film. The PVA-Lg/Pd NC attained a significant color difference value greater than five, meaning permanent color changes.
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Affiliation(s)
- Foued Gharbi
- Department of Physics, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi Arabia; (T.H.A.); (N.A.); (A.A.)
- Unité de Radioanalyse, Centre National des Sciences et Technologies Nucléaires, Technopôle de Sidi Thabet, Sidi Thabet 2020, Tunisia
- Correspondence:
| | - Kaoutar Benthami
- Physics Department, Facult’e des Sciences, Universit´e Moulay Ismail, B.P. 11201, Meknes 50050, Morocco;
| | - Tarfa. H. Alsheddi
- Department of Physics, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi Arabia; (T.H.A.); (N.A.); (A.A.)
| | - Mai M. E. Barakat
- Physics Department, Faculty of Science Yanbu, Taibah University, Yanbu 41912, Saudi Arabia;
- Physics Department, Faculty of Science, Alexandria University, Alexandria 21500, Egypt
| | - Nisrin Alnaim
- Department of Physics, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi Arabia; (T.H.A.); (N.A.); (A.A.)
| | - Adil Alshoaibi
- Department of Physics, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi Arabia; (T.H.A.); (N.A.); (A.A.)
| | - Samir A. Nouh
- Physics Department, Faculty of Science, Taibah University, Medina 44256, Saudi Arabia;
- Physics Department, Faculty of Science, Ain Shams University, Cairo 11865, Egypt
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Tommalieh MJ, Barakat MME, Bahareth RA, Mahrous EM, Aldawood S, Nouh SA. Thermal, Optical, and Color Modification in Makrofol VLG 7-1 Nuclear Track Detector Due to Gamma Irradiation. J MACROMOL SCI B 2022. [DOI: 10.1080/00222348.2022.2052456] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- M. J. Tommalieh
- Department of Physics, Faculty of Science, Taibah University, Al-Madina al Munawarah, Saudi Arabia
| | - M. M. E. Barakat
- Department of Physics, Faculty of Science, Taibah University, Yanbu, Saudi Arabia
- Department of Physics, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Radiyah A. Bahareth
- Department of Physics, College of Science, Jeddah University, Jeddah, Saudi Arabia
| | - E. M. Mahrous
- Department of Physics, Faculty of Science, Taibah University, Al-Madina al Munawarah, Saudi Arabia
| | - Saad Aldawood
- Department of Physics and Astronomy, College of Science, King Saud University, Saudi Arabia
| | - S. A. Nouh
- Department of Physics, Faculty of Science, Taibah University, Al-Madina al Munawarah, Saudi Arabia
- Department of Physics, Faculty of Science, Ain Shams University, Cairo, Egypt
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Qu Y, Zheng Z, Yu Z, Song M, Zhang Y, Zhao Y, Yu J. Chain-like PtPd nanoparticles with a long-time stability as an efficient electrocatalyst for alcohols oxidation reaction. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127756] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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