Abstract
A novel method for preparing durable superamphiphobic fabrics is reported, which involves preapplying a solution consisting of perfluoroalkyl acrylate, epoxide-containing silane, and silica nanoparticles onto fabric and subsequent argon-plasma treatment. The coated fabrics show superphobic to both water and oil fluids (surface tension >21.5 mN m-1 ). The coating is durable to withstand repeated laundries and multicycles of abrasion without apparently altering the superamphiphobicity. The coating is also very stable in boiling water, strong acid, and base, but has little effect on the fabric handle and air permeability. The argon-plasma-enhanced coating may offer a facile way to prepare durable superamphiphobic fabrics.
Highlights
Previous papers have reported on the preparation of superamphiphobic surfaces based on either high-power plasma to form a hierarchical structure followed by plasma-enhanced chemical vapor deposition (PECVD), [15,16] or in-situ polymerization of fluoro-containing chemicals through PECVD. [20, 21] The two-step plasma is suitable for treatment of dense substrates such as silicon wafer, glass and polymer films, while the single-step PECVD is normally used to obtain superamphiphobic fabrics
We have for the first time proved that durable superamphiphobic fabrics can be prepared by pre-applying a solution consisting of fluoroalkyl acrylate, epoxide-containing silane and silica nanoparticles onto fabric substrate and by subsequently argon-plasma treatment in vacuum
Using 1H,1H,2H,2H-perfluorodecyl acrylate (PFDA), (3-glycidyloxypropyl) trimethoxysilane (GPTMS) and commercial silica nanoparticles as models, we showed that the treated fabrics had excellent superamphiphobicity and the coating was highly durable against repeated laundries, multicycle abrasion, and boiling in acid and base solutions
Summary
Superamphiphobic surfaces possess strong repellency to both water and oil fluids. [1] They are prepared mainly by forming hierarchically rough surface with very low surface free energy. [2, 3] The hierarchical surfaces can be prepared by a few methods such as nano-particulate coating, [4, 5] etching, [6,7,8] and lithography, [9, 10] while the low surface free energy is typically attained by fluorocontaining chemicals. [11] Most of superamphiphobic surfaces are fabricated by wet-chemical coating, [12, 13] lithography plus fluorinating, [14] nano-texturing plus fluorinating, [15, 16] or electrospinning. [17]. [2, 3] The hierarchical surfaces can be prepared by a few methods such as nano-particulate coating, [4, 5] etching, [6,7,8] and lithography, [9, 10] while the low surface free energy is typically attained by fluorocontaining chemicals. [29] We found that argon plasma could significantly stabilize silane coating and form durable superhydrophobic layer on substrates Using this method to prepare superamphiphobic fabrics has not been proven. We have for the first time proved that durable superamphiphobic fabrics can be prepared by pre-applying a solution consisting of fluoroalkyl acrylate, epoxide-containing silane and silica nanoparticles onto fabric substrate and by subsequently argon-plasma treatment in vacuum. Argon plasma treatment of small molecules may form a novel method to prepare durable, highly air-permeable, superamphiphobic fabrics for various applications
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