▎ 摘　　要

An isophorone-based quaternary compound with two positively charged polymer chains has been synthesized to modify charge-neutral graphene without affecting its unique intrinsic properties. A highly scalable dip and dry coating method is employed to coat the textile-based substrates without subsequent post-treatment. The resultant electronic textiles exhibit remarkably low sheet resistance approximate to 140 ohm sq(-1)) after 10 washing cycles, which is considerably better compared to any reported graphene-based e-textiles without post-treatment. Graphene-based nonwoven piezoresistive sensors developed for wearable e-textiles use this approach to exhibit an impressive piezoresistive sensitivity in the low-pressure range of 0 to 40 Pa and display good repeatability after washing cycles. Hence this novel modification strategy is envisaged to have strong potential for multifunctional applications in next-generation graphene-based wearable e-textiles.