Investigating Surgical Mask Thermal Degradation via X-Ray Techniques for Efficient Reuse

The Covid-19 crisis has led to a massive surge in the use of surgical masks worldwide, causing risks of shortages and high pollution. Reusing the masks may be promising to reduce such risks, especially since various decontamination techniques are being investigated. In this study, the thermal degradation of surgical masks was investigated using X-ray-based techniques such as XRD and XPS. Additional characterization was performed using scanning electron microscopy and contact angle measurements. XRD experiments reveal an increase in both crystal size and crystallinity of the mask with temperature until it is destroyed at 160 degrees C. However, XPS results show that there was no significant change in the surface chemistry of the mask, as no other chemical element has been detected in the mask heated up. Breathability has been proven compliant with standards until 150 degrees C. This study explores the thermal degradation of surgical masks. Utilizing X-ray techniques such as XRD and XPS, alongside scanning electron microscopy and contact angle measurements, we observe an increase in crystal size and crystallinity until the mask's destruction at 160 degrees C. Despite thermal stress, surface chemistry remains unchanged according to XPS analysis. Breathability complies with standards up to 150 degrees C, suggesting potential for mask reuse. image