Scholarlink

<p>This study investigates the structural, optical, fluorescence, and radiation shielding properties of novel polymer composites based on a PMMA/PEO blend incorporating Mn<sub>0.9</sub>Mg<sub>0.1</sub>WO<sub>4</sub>, TBAI, and varying MoS<sub>2</sub> concentrations (0–4 wt.%). Composites were fabricated via solution casting. Structural analysis (XRD/SEM) confirmed successful integration of crystalline fillers into the semicrystalline polymer matrix. Optical properties (UV–Vis) revealed tunable direct band gaps ranging from 3.24 to 4.99 eV and indirect band gaps ranging from 1.58 to 4.73 eV, adjustable by filler composition. Fluorescence characteristics (CIE 1931) demonstrated that emission color and purity depend strongly on excitation wavelength and MoS<sub>2</sub> content; notably, under 435 nm excitation, 1–2 wt.% MoS<sub>2</sub> enhanced color purity from ~ 11% to ~ 23.5%, demonstrating tunable emission properties. Radiation shielding performance (Phy-X/PSD) showed that the fully loaded composite achieved enhanced gamma-ray attenuation (linear attenuation coefficient = 3.56 cm<sup>-1</sup> at 15 keV, ~ 2.7 times that of the pristine blend), competitive performance at 0.5 MeV (0.229 cm<sup>-1</sup>, comparable to concrete), and the lowest half-value layer, tenth-value layer, mean free path, and buildup factors. It also exhibited the highest effective atomic number, effective electron density, and fast neutron removal cross section. These lightweight, lead-free composites integrate tunable optical properties with theoretically predicted enhanced gamma and neutron shielding, offering a promising alternative that requires experimental validation for advanced radiation protection applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Structural, Optical, Fluorescence, and Radiation Shielding Properties of Polymer Composites Based on PMMA/PEO Blend Doped with Mn0.9Mg0.1WO4, TBAI, and xwt.% MoS2

  • 期刊论文

  • 发表日期：

    2026年5月4日

查看全文
  • A. M. El-Naggar,
  • A. M. Kamal

摘要

This study investigates the structural, optical, fluorescence, and radiation shielding properties of novel polymer composites based on a PMMA/PEO blend incorporating Mn0.9Mg0.1WO4, TBAI, and varying MoS2 concentrations (0–4 wt.%). Composites were fabricated via solution casting. Structural analysis (XRD/SEM) confirmed successful integration of crystalline fillers into the semicrystalline polymer matrix. Optical properties (UV–Vis) revealed tunable direct band gaps ranging from 3.24 to 4.99 eV and indirect band gaps ranging from 1.58 to 4.73 eV, adjustable by filler composition. Fluorescence characteristics (CIE 1931) demonstrated that emission color and purity depend strongly on excitation wavelength and MoS2 content; notably, under 435 nm excitation, 1–2 wt.% MoS2 enhanced color purity from ~ 11% to ~ 23.5%, demonstrating tunable emission properties. Radiation shielding performance (Phy-X/PSD) showed that the fully loaded composite achieved enhanced gamma-ray attenuation (linear attenuation coefficient = 3.56 cm-1 at 15 keV, ~ 2.7 times that of the pristine blend), competitive performance at 0.5 MeV (0.229 cm-1, comparable to concrete), and the lowest half-value layer, tenth-value layer, mean free path, and buildup factors. It also exhibited the highest effective atomic number, effective electron density, and fast neutron removal cross section. These lightweight, lead-free composites integrate tunable optical properties with theoretically predicted enhanced gamma and neutron shielding, offering a promising alternative that requires experimental validation for advanced radiation protection applications.