a.Materials Testing and Surface Chemical Analysis Lab, National Institute of Standards (NIS), Giza 12211, Egypt
b.Radiation Protection and Safety Department, Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority (EAEA), Cairo 11787, Egypt
c.Radiation Chemistry Department, National Centre for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo 11787, Egypt
soma.elmogy@yahoo.com, soma.elmogy@nis.sci.eg (S.A.E)
memo.faraway2@gmail.com (M.M.E.)
收稿:2025-10-23,
修回:2026-01-09,
录用:2026-02-04,
网络首发:2026-04-16,
纸质出版:2026-06-05
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El Mogy, S. A.; Ramadan, W.; EL-Zayat, M. M. Tailoring the surface morphology, mechanical, thermal, and radiation shielding properties of polyethylene nanocomposites via nano-magnesium ferrite and gamma radiation. Chinese J. Polym. Sci. 2026, 44, 1855–1867
Soma A. El Mogy, Wageeh Ramadan, M. M. EL-Zayat. Tailoring the Surface Morphology, Mechanical, Thermal, and Radiation Shielding Properties of Polyethylene Nanocomposites
El Mogy, S. A.; Ramadan, W.; EL-Zayat, M. M. Tailoring the surface morphology, mechanical, thermal, and radiation shielding properties of polyethylene nanocomposites via nano-magnesium ferrite and gamma radiation. Chinese J. Polym. Sci. 2026, 44, 1855–1867 DOI: 10.1007/s10118-026-3613-x.
Soma A. El Mogy, Wageeh Ramadan, M. M. EL-Zayat. Tailoring the Surface Morphology, Mechanical, Thermal, and Radiation Shielding Properties of Polyethylene Nanocomposites
This study develops lead-free low-density polyethylene (LDPE) nanocomposites reinforced with MgFe
2
O
4
nanoparticles
offering promising eco-friendly solutions for gamma-ray shielding
especially under irradiation conditions.
Eco-friendly nanocomposites designed for gamma-ray shielding were developed by incorporating nano-magnesium ferrite (MgFe
2
O
4
NPs) within low-density polyethylene (LDPE). This approach aims to create a lead-free
cost-effective
and environmentally sustainable shielding material. The LDPE nanocomposite was prepared using a melt blending technique. The incorporation of MgFe
2
O
4
nanoparticles improved the radiation attenuation capabilities of the polymer matrix
offering a safer alternative to the traditional lead-based shields. The influence of MgFe
2
O
4
NPs integration and gamma irradiation on the mechanical and thermal characteristics of LDPE/MgFe
2
O
4
nanocomposites was systematically investigated. MgFe
2
O
4
NPs were synthesized using the co-precipitation method and c
onfirmed to have single-phase nanocrystalline spinel structures by scanning electron microscopy (SEM)
energy-dispersive X-ray spectroscopy (EDX)
Fourier transform infrared spectroscopy (FTIR)
and X-ray diffraction (XRD) analyses. The results revealed that the optimal filler content was 15 wt% MgFe
2
O
4
NPs
which improved the tensile strength (TS) from 7.55 MPa to 10.42 MPa (about 38% enhancement). The LDPE nanocomposite containing 15 wt% of NPs that was exposed to 100 kGy had the highest TS value (11.8 MPa)
with an improvement of 56% compared with that of the unirradiated LDPE nanocomposite. The addition of MgFe
2
O
4
enhanced the shielding performance of LDPE against gamma radiation
as indicated by the higher attenuation coefficients
lower half-value layer (HVL)
and minimum mean free path (MFP). Increasing MgFe
2
O
4
content
decreasing photon energy
and applying irradiation all contribute to enhancing the attenuation performance of LDPE nanocomposites. Furthermore
the incorporation of MgFe
2
O
4
improved the thermal properties of the nanocomposites. TGA analysis showed that both gamma irradiation and MgFe
2
O
4
addition enhanced the thermal stability of the LDPE. Among all samples
LDPE15-r100 exhibited the best performance
showing the highest degradation onset temperature (415.16 °C)
the highest T50 (465.30 °C)
and the largest residual mass at 600 °C (11.81%). These findings confirm that LDPE/MgFe
2
O
4
nanocomposites are promising candidates for eco-friendly gamma-ray shielding applications
particularly when irradiated.
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