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UV & Thermal Resistant Biodegradable Polymer Blend for Smartphone Casing
Summary
Researchers synthesized a biodegradable polymer blend of starch-PVA cross-linked with SiO2, ZnO, and TiO2 nanoparticles for use as smartphone casings, achieving 92% UV-B blocking, a 40-degree improvement in thermal stability onset, and balanced mechanical properties.
Abstract. For smartphone casings, the study synthesized a biodegradable polymer blend of starch-PVA cross-linked with SiO₂, ZnO, and TiO₂ nanoparticles. The optimized composite shows 92% UV-B blocking, with a 40°C enhancement in thermal stability (onset at 290°C) and balanced mechanical properties (18 MPa tensile strength, 45% elongation). Crosslinking with acetic acid and using dual plasticizers (glycerin/Vaseline) improved water resistance while preserving 80% biodegradability in 60 days. These findings portray a sustainable option as compared to the ABS and PC casings for resolving background problems with e-waste, without compromising performance. Keywords: Biodegradable polymer, smartphone casing, UV resistance, nanocomposite, thermal stability, starch-PVA blend.
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