Abstract
Novel and intelligent plasma copolymers based on hydrophilic/hydrophobic monomers with tunable wettability and pH‐responsiveness are demonstrated. A series of plasma copolymer coatings with various carboxylic acid and fluorocarbon group ratio are prepared on the low‐density polyethylene (LDPE) surfaces via capacitively coupled radio frequency plasma (CCP). The static water contact angles (SWCA) of C4F8‐co‐AA plasma polymer coatings on nanotextured LDPE surfaces tuned from 163 to 4°. These C4F8‐co‐AA plasma polymer coatings showed different pH‐responsiveness by the combined effect of the carboxylic acid to fluorocarbon group ratios and surface nanotexture. The increase of carboxylic acid groups of C4F8‐co‐AA plasma polymers shifted the reversibly switchable wettability of pH‐responsiveness towards low SWCA range. The magnifying effect of surface nanotexture on pH‐responsiveness was also observed.
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