Flexible and strain conductive cotton yarn enabled by low-temperature sintering of silver paste with multifunctional sensing capability in human motion detection and wearable applications

Flexible Mechanical Sensors Fabricated with Graphene Oxide-Coated Commercial Silk

“…The GF is defined by (ΔRL0)/(R0ΔL). The GF of the strain sensor was small (GF = 0.307) compared with previous studies[25,29,33,35] but it was larger than the cotton yarn with Ag-paste[22] and Ag-coated nylon[42]. Hence, we found that the twisted rGOC yarn could be used as a motion sensor.…”

“…Cotton fabric has been decorated with Ag nanowires, Ag flowers, and Ag thread [17][18][19][20], and coatings of electrochemically exfoliated graphene film on cotton fabric [21], and coatings of Ag on cotton yarn using Ag paste followed by sintering [22] have been used to provide electrical conductivity. Likewise, electronic textiles for sensors fabricated with nylon and polyester have been achieved using conducting polymer [23], Au and MoS2-coating [24], graphite-polyurethane (PU) coating on crochet knitted elastic [25], screen-printing of elastic conductive carbon ink on polyester fabric [26], wet-spinning of CNT/thermoplastic PU on silver-plated nylon electrodes [27], coating of CNT/carbon black-PU on the fabric with Ag-coated conductive nylon fiber [28], and spraying of multiwall CNT/TiO2 conductive suspension on nylon textiles [29].…”

A Scalable and Robust Personal Health Management Textile with Multiple Desired Thermal Functions and Electromagnetic Shielding

“…The conductive network based on the silver paste and cotton fibers endows the AgPA/CF with the sensing performance. [ 40 ] The sensing sensitivity of the AgPA/CF sensor was measured. The sensitivity ( S ) is defined as S = (Δ I / I 0 )/ΔP, where Δ I is the current variation under pressure, I 0 is the initial current, and Δ P is the applied pressure.…”

“…This is because the force generated by the finger induces the increase of charge conduction paths and the integrity of the conductive network during the process of gradual bending and reduces the resistance, leading to the increase of current. [ 40 , 41 ] In the process of the finger unbending, the charge conduction paths of the AgPA/CF‐based sensor are reduced and thus the current reduces to the initial state. Figure 7d clearly describes the current changes caused by wrist bending and unbending.…”

Superior Instant Heating and Electrothermal Performances of Interconnected Graphene-Expanded Graphite-Based Electric Heating Composite

“…According to the type of conductive properties, the electric heating materials can be divided into intrinsic electric heating materials and electric heating composites. − The intrinsic electric heating materials consist of metal and metal oxide electric heating materials. Metal electric heating materials are mainly made of metals and precious metals, which show superior electrical conductivity but suffer from easy oxidation, short lifespan, fragility, low efficiency, and high cost. − Metal oxide electric heating materials, mainly composed of indium tin oxide (ITO), possess good electrical conductivity and transparency . However, disadvantages such as brittleness, high price, and irreversible rise in resistance at high temperatures restrict its large-scale application. , Electric heating composite, also known as filled electric heating material, is a kind of multicomponent composite material with polymer as substrate and conductive materials as filler with a certain conductive function and good mechanical properties. , Electric heating composites show the advantages of good processability, simple preparation process, corrosion resistance, large adjustable range of resistivity, and low price, which is a kind of widely used functional polymer material. − …”