In this study, 2-(2-hydroxy-4-acryloyl)-2H-benzotriazole (BTHA), a benzotriazole ultraviolet absorber monomer, was synthesized from 2-(2,4-dihydroxyphenyl)-benzotriazole (BTDP) and acryloyl chloride. The synthesized BTHA was characterized by 1 H-NMR, FTIR, and ultraviolet spectroscopy, and grafted onto polyester fabrics by the traditional pad-dry-cure (PDC) process. The effects of monomer concentration and initiator concentration on the UPF values of the grafted PET fabrics were studied. The grafted fabrics were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). The breaking strength of the grafted PET fabrics was comparable with the original PET fabrics in warp and weft directions. The UV protection factors improved significantly after grafting. The modified PET fabrics exhibited good durability to washing. The grafting of BTHA onto PET fabrics protected the damage of UV light to PET fabrics and decreased the strength loss of PET fabrics after UVA light exposure.
Superhydrophobic textiles are important superhydrophobic materials because of their low cost and high demand. In this work, low surface energy substance, dodecyltrimethoxysilane (DTM), was used to modify the hydrolyzed tetrabutyl titanate (Ti(OH) 4 ) to obtain DTM@Ti(OH) 4 particles and realize the surface organic modification of Ti(OH) 4 particles. Then, functional cotton fabric was prepared by loading DTM@Ti(OH) 4 particles onto the fabric based on the adhesion of natural polyphenols. The static contact angle of finished cotton fabric was up to 169.9°, the rolling contact angle was less than 8°, and the UPF value was generally greater than 70. Due to the excellent adhesion of polyphenols, the superhydrophobic cotton fabric showed great stability and durability under harsh environmental conditions. By various treatments, the water contact angles (CA) of the finished fabrics can still be greater than 155° and the UPF value was still greater than 50. The preparation process is simple, efficient and low-cost, which is suitable for large-scale industrial production. Encouragingly, this modification method is universal and can be applied to other kinds of fabrics. It has broad application prospects in outdoor textiles, oil and water separation, metal corrosion prevention and other fields. Graphic abstract
危险品化学品经营许可证（带存储）