Thermo-Conductive, Air-Permeable, and Hydrophobic Sulfonated Poly(Styrene-Ethylene/Butylene-Styrene)/Boron Nitride Nanosheet Nanofiber Membranes for Wearables via One-Step Electrospinning

Polymermaterials based on highly thermal conductivefillers haveemerged as an effective way to achieve wearable thermal managementsuch as personal cooling, thermal management of wearable devices,and so on. Highly thermal conductive fillers, such as boron nitridenanosheets (BNNSs), integrated with fibrous materials are a promisingway to construct highly thermal conductive polymer materials. However,many fabrication processes are complex and time consuming. Also, alarge amount of BNNSs was loaded into the resultant materials to enhancethermal conductivity. Here, we first prepared hydrophobics sulfonatedpoly(styrene-ethylene/butylene-styrene) (S-SEBS)/BNNS nanofiber membraneswith high thermal conductivity and air permeability for efficientthermal management via facile one-step electrospinning. This strategymade BNNSs uniformly disperse along the nanofibers. Meanwhile, theporous structure remained, enhancing thermal conductivity withoutsacrificing air permeability. Therefore, the resultant air-permeabletextiles demonstrated outstanding thermal management performance withultrahigh in-plane thermal conductivity of 16.37 W center dot m(-1)center dot K-1 and out-plane thermal conductivity of0.1037 W center dot m(-1)center dot K-1 atBNNS loading of 15 wt % as well as a hydrophobic surface which couldresist stain adhesion, indicating promising utility for wearable thermalmanagement applications.