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Электронный каталог: Abdelhameed, D. - Radiation-Induced Tunable Response from Chain Scission to Crosslinking and Dielectric Enhancement...
Abdelhameed, D. - Radiation-Induced Tunable Response from Chain Scission to Crosslinking and Dielectric Enhancement...
Статья
Автор: Abdelhameed, D.
Surfaces and Interfaces: Radiation-Induced Tunable Response from Chain Scission to Crosslinking and Dielectric Enhancement...
б.г.
ISBN отсутствует
Автор: Abdelhameed, D.
Surfaces and Interfaces: Radiation-Induced Tunable Response from Chain Scission to Crosslinking and Dielectric Enhancement...
б.г.
ISBN отсутствует
На полку
Статья
Abdelhameed, D.
Radiation-Induced Tunable Response from Chain Scission to Crosslinking and Dielectric Enhancement in BaAl&sub()O&sub(4)/PVA-PVP-CMC Polymer Nanocomposites / D.Abdelhameed, O.M.Kotb, [a.o.]. – Text : electronic // Surfaces and Interfaces. – 2026. – Vol. 98. – P. 110431. – URL: https://doi.org/10.1016/j.surfin.2026.110431. – Bibliogr.: 59.
The demand for lightweight, flexible materials capable of withstanding radiation while maintaining electrical functionality is rapidly growing in nuclear, medical, and aerospace sectors. To address this challenge, barium aluminate (BaAl&sub(2)O&sub(4)) nanoparticles were synthesized via sol-gel and dispersed at 0-6 wt.% into a polyvinyl alcohol-polyvinyl pyrrolidone-carboxymethyl cellulose (PVA-PVP-CMC) blend using solution casting. Gamma irradiation (0-100 kGy) was applied, and dielectric properties were evaluated across temperatures (303-403 K) and frequencies (100 Hz-1 MHz). Structural analysis by X-ray diffraction first confirmed successful nanoparticle integration with optimal dispersion at 3 wt.%, while quantitative Fourier transform infrared spectroscopy revealed a dose-dependent transition from chain scission at low doses to crosslinking at high doses. This transition manifests dramatically in the dielectric response, where the 3 wt.% nanocomposite exhibited a peak-shaped dielectric response with optimal performance at 50 kGy, achieving at 403 K a dielectric strength of 249.55 (a 100% enhancement) and maximum DC conductivity of 1.77 × 10&sup(-8) S/cm (a 46.7-fold enhancement) over the unirradiated sample. Correlated barrier hopping was confirmed as the dominant conduction mechanism, with the s-exponent decreasing from 0.935 to 0.608 at 50 kGy. Extending our investigation to radiation shielding, NGCal software calculations (30 keV-15 MeV) revealed that increasing BaAl2O4 content systematically enhances gamma-ray attenuation, with the 6 wt.% sample achieving the highest linear attenuation coefficient (0.045 cm⁻¹ at 5 MeV). These findings establish the 50 kGy-optimized BaAl&sub(2)O&sub(4)/PVA-PVP-CMC nanocomposite as a versatile platform for lightweight, flexible applications from gamma dosimetry and sterilization verification to radiation-hardened electronics and high-temperature energy storage in extreme environments.
Спец.(статьи,препринты) = С 349.1 - Действие излучения на материалы$
Спец.(статьи,препринты) = С 33 а - Нанофизика. Нанотехнология$
Abdelhameed, D.
Radiation-Induced Tunable Response from Chain Scission to Crosslinking and Dielectric Enhancement in BaAl&sub()O&sub(4)/PVA-PVP-CMC Polymer Nanocomposites / D.Abdelhameed, O.M.Kotb, [a.o.]. – Text : electronic // Surfaces and Interfaces. – 2026. – Vol. 98. – P. 110431. – URL: https://doi.org/10.1016/j.surfin.2026.110431. – Bibliogr.: 59.
The demand for lightweight, flexible materials capable of withstanding radiation while maintaining electrical functionality is rapidly growing in nuclear, medical, and aerospace sectors. To address this challenge, barium aluminate (BaAl&sub(2)O&sub(4)) nanoparticles were synthesized via sol-gel and dispersed at 0-6 wt.% into a polyvinyl alcohol-polyvinyl pyrrolidone-carboxymethyl cellulose (PVA-PVP-CMC) blend using solution casting. Gamma irradiation (0-100 kGy) was applied, and dielectric properties were evaluated across temperatures (303-403 K) and frequencies (100 Hz-1 MHz). Structural analysis by X-ray diffraction first confirmed successful nanoparticle integration with optimal dispersion at 3 wt.%, while quantitative Fourier transform infrared spectroscopy revealed a dose-dependent transition from chain scission at low doses to crosslinking at high doses. This transition manifests dramatically in the dielectric response, where the 3 wt.% nanocomposite exhibited a peak-shaped dielectric response with optimal performance at 50 kGy, achieving at 403 K a dielectric strength of 249.55 (a 100% enhancement) and maximum DC conductivity of 1.77 × 10&sup(-8) S/cm (a 46.7-fold enhancement) over the unirradiated sample. Correlated barrier hopping was confirmed as the dominant conduction mechanism, with the s-exponent decreasing from 0.935 to 0.608 at 50 kGy. Extending our investigation to radiation shielding, NGCal software calculations (30 keV-15 MeV) revealed that increasing BaAl2O4 content systematically enhances gamma-ray attenuation, with the 6 wt.% sample achieving the highest linear attenuation coefficient (0.045 cm⁻¹ at 5 MeV). These findings establish the 50 kGy-optimized BaAl&sub(2)O&sub(4)/PVA-PVP-CMC nanocomposite as a versatile platform for lightweight, flexible applications from gamma dosimetry and sterilization verification to radiation-hardened electronics and high-temperature energy storage in extreme environments.
Спец.(статьи,препринты) = С 349.1 - Действие излучения на материалы$
Спец.(статьи,препринты) = С 33 а - Нанофизика. Нанотехнология$
