Construction of a durable superhydrophobic flame-retardant coating on the PET fabrics

In order to meet the increasing demand for fire prevention and pollution prevention of polyester fiber fabrics (PET) in different scenes, it is imperative to develop surface coatings with superhydrophobic and flame retardant properties. However, how to realize all these functions at the same time is still a big challenge. In this work, fluorinated PDMS was obtained through the cross-linking reaction between fluorosilane and PDMS, which was evenly mixed with the combustion product of silicone rubber (mainly composed of SiO2) and ammonium polyphosphate (APP), and the mixed coating was deposited on the surface of PET fabrics by spraying method to construct a superhydrophobic flame-retardant coating. The coated fabrics shows good superhydrophobicity (water contact angle is 155.61 ± 1.42°, sliding angle is 3.2 ± 0.4°) and self-cleaning performance. In particular, the prepared coated fabrics also has excellent mechanical durability, and it still does not lose its superhydrophobicity after 10 abrasive paper rubbing cycles, 60 minutes washing and even 300 bending and twisting cycles. In addition, compared with the original fabrics, the coating shows excellent flame retardant performance, which can realize self-extinguishing within 10s in vertical combustion experiment.