Abstract
Polyethylene terephthalate (PET) woven fabrics are gradually becoming the main substrate for breathable multifunctional wearable electronic textiles owing to their lightweight, high strength, good chemical resistance, and low cost. The coating process of MXene was modeled and optimized by the response surface methodology (RSM). Simultaneous effects of cycles and time on the performance of MXene-coated PET fabric were studied. Noticeably, the optimized flexible, breathable, and washable PET heater with the RSM approach exhibited exceptional multifunctional performances with a low loading amount and maintained its inherent properties. The lightweight wearable heater demonstrated superior electrical conductivity and excellent photothermal properties with a wide temperature range. Furthermore, the excellent relative electromagnetic shielding (up to 59.5 dB/mm in X-band) and antibacterial activity of the multifunctional heater against Escherichia coli (E. Coli) within a short time of 20 min reached over 98% without the addition of disinfecting agents. More significantly, MXene created the flame retardancy of PET fabrics and anti-dripping performance, representing safety in service. These multifunctional wearable MXene-based heaters are outstanding candidates for heating management and health protection in the future with high sensitivity, fast response, easy processability, and suitable durability.
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