Journal
APPLIED SURFACE SCIENCE
Volume 607, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2022.155026
Keywords
Photo-crosslinkable fluorinated polymer; Nepenthes pitcher mimetic coating; Solubility parameter theory; Durability; Self -healing
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An azidophenyl-containing fluorinated polymer and fluoroalkylsilane are used to create a durable water-repellent coating on fabric, mimicking the Nepenthes pitcher plant. The coating shows good durability and self-healing capacity. By adjusting the polymer ratio and structure, the water-repellent durability of the coating can be improved.
An azidophenyl-containing fluorinated polymer (PFAz) together with fluoroalkylsilane (FAS) are used as model substances to form an FAS-infused polymer coating on the outermost fabric surface based on solubility parameter theory. It creates a Nepenthes pitcher mimetic water-repellent coating with good durability and self-healing capacity. The results show that lower Ra,FAS-PFAz (3.7-4.3 MPa1/2) tends to drive the formation of FAS-PFAz aggregates in the mixed PFAz-FAS solution firstly. It plays an important role in design of FAS-infused PFAz polymer coating and regulation of water-repellent durability. The appropriate of FAS/PFAz ratio and chemical structure of PFAz are beneficial to avoid the formation of FAS cage in the solution and over-crosslinking upon UV exposure. The resultant PFAz22-FAS-SiO2@fabric could resist 240 min of ultrasonication in THF, 700 cycles of Martindale abrasion, 175 cycles of standard laundering tests and 11 cycles of oxygen plasma and heating. It provides a new way to design durable Nepenthes pitcher mimetic coating based on Hansen solubility parameter principle.
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