Information from the abstract
This study valorized silicone waste powder (SWP) reclaimed from discarded silicone molds as a silica-rich secondary filler in ethylene–propylene–diene monomer (EPDM) composites containing nano-sized bismuth oxide (nano-Bi 2 O 3 ) for lead-free diagnostic X-ray shielding applications. To enhance filler–matrix compatibility, SWP was surface-treated with silane coupling agent (Bis-[3-(triethoxysilyl)propyl]tetrasulfide; TESPT), and the optimum treatment condition was determined through mechanical-property evaluation. Subsequently, nano-Bi 2 O 3 /SWP/EPDM composites containing 0 – 500 parts per hundred rubbers by weight (phr) nano-Bi 2 O 3 were fabricated and systematically characterized for their morphology, density, thermal stability, mechanical properties, and X-ray attenuation abilities at tube voltages of 60, 100, and 150 kVp. The results revealed that TESPT treatment improved interfacial adhesion between SWP and EPDM, with 1 g TESPT per 100 g SWP providing the highest tensile strength. Incorporation of nano-Bi 2 O 3 was found to substantially enhance the X-ray shielding properties of the composites, as evidenced by progressive increases in attenuation capability with increasing filler content. Particularly, a nano-Bi 2 O 3 content of 425 phr was sufficient to achieve the commonly required shielding level of 0.35 mmPb for diagnostic X-ray protection. In addition to improved shielding properties, increasing nano-Bi 2 O 3 content also enhanced thermal stability, tensile modulus, tensile strength, and hardness, while reducing solvent swelling. Based on the overall findings, the nano-Bi 2 O 3 /SWP/EPDM composites demonstrated a practical approach for converting SWP into value-added products while providing flexible and lead-free radiation-shielding materials suitable for diagnostic X-ray applications, including wearable protective devices, protective garments, and other radiation-shielding components for medical imaging facilities.
Why this record is monitored
This record has an Impact Signal of 76/100 based on recency, source, collaboration, and bibliographic signals. It prioritizes monitoring and is not a judgment of research quality.
Related topics: Radiation Shielding Materials Analysis · Polymer Nanocomposites and Properties · Nuclear materials and radiation effects
Thai researcher and institutional participation
Thiwaporn Chumphon · Ariya Khamnuandet · Ekachai Wimolmala · Worawat Poltabtim · Thitaphat Ngernsutivorakul · Kiadtisak Saenboonruang · Kasetsart University · Joint Graduate School of Energy and Environment · King Mongkut's University of Technology Thonburi · Chiang Mai University · Thailand Center of Excellence in Physics
Data limitations
This page is a bibliographic record based on abstract-level information, not a full analysis or quality assessment. Verify the DOI and original article before citation.