AP0950 Structural, Morphological and Electrical Properties of SiC:PVA:PEDOT:PSS Paper-Based Materials for Flexible Strain Sensors

Abstract

In this study, we investigated the impact of acidic composite solutions on cellulose structures and evaluated the morphology, structural properties, and electrical performance of SiC:PVA:PEDOT:PSS composites. Optical microscopy revealed that acidic solutions significantly damage cellulose, whereas incorporating PVA prevents such damage, creating a rod-like structure beneficial for sensor applications. X-ray diffraction (XRD) analysis showed a transition from amorphous to crystalline phases in samples treated with H₂SO₄, highlighting improved crystallinity. Fourier-transform infrared (FTIR) spectroscopy indicated enhanced intermolecular hydrogen bonding and conformational changes within the polymer matrix, contributing to increased electrical conductivity. Scanning electron microscope (SEM) images illustrated varying morphologies influenced by acid treatments, with PEDOT:PSS and PVA forming smooth, compact structures. Electrical measurements demonstrated a substantial rise in conductivity and decreased sheet resistance, with the highest conductivity observed in samples treated with H₂SO₄. The composites were successfully tested as strain sensors, showing promising performance in response to human actions, underscoring their potential for practical applications.