Study on hydrophobicity of surface texture of PE-UHMW
Aiming at the problems in the high surface adhesion of ultrahigh-molecular-weight polyethylene(PE-UHMW)with viscous materials as well as its poor cleaning performance,the surface of PE-UHMW was modified with microstruc-ture by using a laser marking machine,and then its hydrophobicity was characterized by using a contact angle tester.The results indicated that the surface modification increased the hydrophobicity of PE-UHMW by 50％,resulting in its anti-adhesion performance with a self-cleaning ability.The hydrophobicity of PE-UHMW was investigated through forming different types of microstructures on the modified surface,and the results showed that the bionic hogweed texture-modi-fied surface had the best hydrophobicity.Based on this rule,the optimal processing parameters of the microstructural hy-drophobicity could be achieved by an optimized combination of processing parameters for the hydrophobicity of the hog-weed bionic microstructure.This combination was determined to be a fabric size of 400 μm,a transverse spacing of 100μm,and a vertical spacing of 100 μm.Through varying the size of the texture,a relationship between the hydrophobicity of the texture and area ratio could be derived.The hydrophobicity increased and then decreased with an increase in the texture area ratio,and the maximum was achieved at a weaving area ratio of approximately 18.5％.
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