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Duchao Feng,Luyang Qiao,Guangdong Sun,Kangjing Hong,Mingyue Wu,Chenglong Wang,Jinhuan Zheng 한국섬유공학회 2023 Fibers and polymers Vol.24 No.10
A magnetic field-driven photocurable superhydrophobic fabric coating technology was developed in this study. The coating, consisting of photoreactive carbonyl iron powder (CIP) assembled hydrophobic micro-nano structures, was constructed on the surface of polyester fabric by combining the magnetic field-driven assembly technology and blue light photocuring technology. Camphorquinone (CQ), ethyl 4-dimethylaminobenzoate (EDB) and diphenyliodonium hexafluorophosphate (DPI) were served as the photoinitiator formulation, while polyurethane diacrylate and hydroxyethyl acrylate (HEA) were used as the polymerization-cross-linking matrix for photocurable coating. Photo-differential scanning calorimetry (Photo-DSC) and rheometry were used to characterize the performance of coating formulations. Optical contact angle meter and scanning electron microscope (SEM) were used in combination with tensile performance test to explore the construction of superhydrophobic structure on coating surface induced by magnetic field. The optimal formulation of photoinitiators for coatings with excellent photopolymerization performance has been definitively established. Photocured coating film displayed a distinct hydrophobicity (the water contact angle is approx. 152.7°, and the sliding angle is approx. 7.2°) when the mass ratio of CIP to polymeric components was 1:1. The coated fabric eventually exhibited a satisfactory hydrophobicity (the water contact angle is approx. 153.3°) and mechanical properties.
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