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<p>This work presents the design, fabrication, and performance evaluation of resistive pressure sensors using a PDMS matrix integrated with graphene as a conductive filler. The sensors exhibit high electrical conductivity and mechanical flexibility, making them suitable for flexible, wearable applications. Comprehensive simulations, supported by SEM analysis, reveal a uniform dispersion of graphene within the PDMS matrix, forming a continuous conductive network essential for sensor functionality. The sensors demonstrated high sensitivity (0.58&#xa0;kPa⁻¹) and a predictable logarithmic relationship between pressure and resistance, making them ideal for precise pressure measurements across a broad range (0.5&#xa0;kPa to 100&#xa0;kPa). Mechanical testing confirmed the sensor’s durability and flexibility over 10,000 bending cycles, showcasing its resilience under repeated deformation. The sensors’ ability to detect finger pressure, pulse signals, and handwriting patterns underscores their versatility for use in wearable devices, health monitoring systems, and human-machine interfaces. The optimization of graphene content (2 wt%) was found to balance conductivity and flexibility, ensuring optimal performance. This work highlights the potential of 3D printing and graphene-based composites for developing high-performance, flexible sensors, with promising applications in next-generation wearable electronics and healthcare monitoring systems.</p>

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Fabrication of Flexible Resistive Pressure Sensors Using Graphene/Polydimethylsiloxane Composites

  • 期刊论文

  • 发表日期：

    2025年4月4日

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  • Zine Ghemari,
  • Abdelmalik Bendaikha,
  • Salah Belkhiri,
  • Salah Saad

摘要

This work presents the design, fabrication, and performance evaluation of resistive pressure sensors using a PDMS matrix integrated with graphene as a conductive filler. The sensors exhibit high electrical conductivity and mechanical flexibility, making them suitable for flexible, wearable applications. Comprehensive simulations, supported by SEM analysis, reveal a uniform dispersion of graphene within the PDMS matrix, forming a continuous conductive network essential for sensor functionality. The sensors demonstrated high sensitivity (0.58 kPa⁻¹) and a predictable logarithmic relationship between pressure and resistance, making them ideal for precise pressure measurements across a broad range (0.5 kPa to 100 kPa). Mechanical testing confirmed the sensor’s durability and flexibility over 10,000 bending cycles, showcasing its resilience under repeated deformation. The sensors’ ability to detect finger pressure, pulse signals, and handwriting patterns underscores their versatility for use in wearable devices, health monitoring systems, and human-machine interfaces. The optimization of graphene content (2 wt%) was found to balance conductivity and flexibility, ensuring optimal performance. This work highlights the potential of 3D printing and graphene-based composites for developing high-performance, flexible sensors, with promising applications in next-generation wearable electronics and healthcare monitoring systems.