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<p>Flexible resistance pressure sensors (fRPSs) will find many applications in robotic and healthcare industries. Conductive elastomer composites (CECs)-based fRPSs are widely researched for their flexibility, high sensitivity, and wide working range. In this study, a novel 2D Ti<sub>2</sub>C material was synthesized from Ti<sub>2</sub>AlC by selective etching of the Al layer using HF etchant. Crystal structure, surface purity, morphology, lattice fringe profiles, and thermal properties of the Ti<sub>2</sub>C were analyzed. CECs were prepared by blending Ti<sub>2</sub>C (60, 70, and 80m%) fillers with PDMS matrix. The elastic modulus of the composite was evaluated under tensile strain. fRPSs were fabricated with silver interdigital electrodes on PET substrates and CECs pressure sensing layer. The compression force was applied on the fRPS by low force stand. The sensor made of PDMS-60 mass% Ti<sub>2</sub>C composite exhibited highest absolute sensitivity of 29.14&#xa0;MΩ/kPa within a 0–3.5&#xa0;kPa range, whereas the PDMS-70 mass% Ti<sub>2</sub>C composite-based sensor shows highest normalized sensitivity of 0.68&#xa0;kPa⁻<sup>1</sup> in the pressure range of 0–1.5&#xa0;kPa. The sensor demonstrated good performance in real-life applications such as radial artery pulse profile, finger and wrist bending monitoring, and touch sensing. This indicates that the sensor has great potential application in healthcare and human–machine interface (HMI) industries.</p>

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Fabrication and characterization of PDMS-Ti2C composites-based flexible resistance pressure sensors

  • 期刊论文

  • 发表日期：

    2026年5月5日

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  • Mullapudi Vijayababu,
  • Vembakam Vijayakanth,
  • Suresh Kumar Vandrangi,
  • Krishnamoorthi Chintagumpala

摘要

Flexible resistance pressure sensors (fRPSs) will find many applications in robotic and healthcare industries. Conductive elastomer composites (CECs)-based fRPSs are widely researched for their flexibility, high sensitivity, and wide working range. In this study, a novel 2D Ti2C material was synthesized from Ti2AlC by selective etching of the Al layer using HF etchant. Crystal structure, surface purity, morphology, lattice fringe profiles, and thermal properties of the Ti2C were analyzed. CECs were prepared by blending Ti2C (60, 70, and 80m%) fillers with PDMS matrix. The elastic modulus of the composite was evaluated under tensile strain. fRPSs were fabricated with silver interdigital electrodes on PET substrates and CECs pressure sensing layer. The compression force was applied on the fRPS by low force stand. The sensor made of PDMS-60 mass% Ti2C composite exhibited highest absolute sensitivity of 29.14 MΩ/kPa within a 0–3.5 kPa range, whereas the PDMS-70 mass% Ti2C composite-based sensor shows highest normalized sensitivity of 0.68 kPa⁻1 in the pressure range of 0–1.5 kPa. The sensor demonstrated good performance in real-life applications such as radial artery pulse profile, finger and wrist bending monitoring, and touch sensing. This indicates that the sensor has great potential application in healthcare and human–machine interface (HMI) industries.