Preparation and Characterization of Thermal Conductivity of Novel Cellulose Acetate/Nano-SiO۲ Composites for Energysaving, using Electrospinning Technique and Oxygen enrichedMethod

In this work, the SiO۲ nanoparticles were applied to amplify the thermal insulator's cellulose acetate(CA) nanofibers via electrospinning and the oxygen-enriched method. Hence, solutions of CA and CA/ SiO۲were made by acetone/ dimethylacetamide (۲:۱) with oxygen enriching and Helium gas.The morphology and chemical structures of nanofibers were screened by SEM and FTIR. Finally,the thermal conductivity of media was calculated by the two-plate Togmeter device test method based on BS۴۷۴۵:۲۰۰۵, and the tensile strength features were evaluated under the ASTM D۶۳۸-۱۰ standard.According to SEM images, SiO۲ nanoparticles incredibly covered the whole surface of CAnanofibers in CA/ SiO۲ media in cloud shape. FTIR vibration spectrums confirmed the siloxane bandsvibrated at ۴۷۵/۷۵ cm-۱ in the CA/ SiO۲ mat. Moreover, the thermal conductivity of the CA/ SiO۲ sheet was at۰.۰۴۴ (W.m-۱. K-۱) with ۰.۴۶۱ ±۲.۸۸ mm thickness. Additionally, the tensile stress of the CA/ SiO۲ membranehad ۰.۴۶۱ MPa tensile stress at ۳.۰۵% tensile strain. Hence, the CA/ SiO۲ composite mat has super lowthermal conductivity with good mechanical properties. Therefore, the production of cellulose acetate/nano-SiO۲ composite for thermal conductivity improvement with energy-saving approaches, using theelectrospinning technique and oxygen-enriched method has excellent potential to be applied as super lowthermal conductivity for energy-saving.

کلیدواژه ها:

Thermal Conductivity ، Tensile strength ، Cellulose Acetate ، SiO۲ ، Nanofibers ، Biodegradable polymer ، Energy-saving