Environmentally Friendly Pressure-Resistant Superhydrophobic Fabrics and Application in Soil Alkali Return Prevention

Superhydrophobic fabrics hold promise for soil salinization control, yet their practical application is hindered by insufficient durability under prolonged mechanical pressure and chemical exposure, coupled with reliance on fluorinated chemistries. Here, we report a robust, nonfluorinated superhydrophobic fabric engineered via a simple dip-coating process that integrates a polyolefin (POF) adhesive layer with alkylsiloxane-modified silica nanoparticles (HD-POS@SiO2) on a polyester substrate. The POF binder creates a unique “semiembedded” anchoring structure that locks nanoparticles onto fibers while preserving essential micro/nanoroughness, ensuring both strong adhesion and sustained superhydrophobicity. The resulting fabric exhibits exceptional durability: it retains superhydrophobicity (WSA < 7°) after 200 days under 33.3 kPa sand pressure and 64 days immersion in saline-alkali solutions. In simulated soil column tests, it suppresses topsoil salt accumulation by 84.8% (reducing surface salinity from 3.23% to 0.49%), while maintaining breathability and a favorable moisture-temperature balance. This work presents a scalable, eco-friendly strategy for fabricating pressure-resistant superhydrophobic textiles, offering a promising solution for sustainable agriculture and soil management.