Scalable technologies to control liquid wetting and adhesion on fiber based substrates
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In this thesis, we explored how wetting properties change with surface chemistry and the topology of the fiber network through controlled plasma etching with combined coating techniques and pulp pretreatment. The approach we reported to fabricate superamphiphobic paper minimizes the cost and material waste, improves mechanical, and has yielded the best liquid repellency on paper surfaces that has ever been reported to date. Applying the same fundamental knowledge gained from studies of wetting control on paper, stainless steel mesh with unique wetting properties and high efficiency for oil-water separation has also been created. For liquid repellent surfaces generated with coatings, direct comparison between some major types of coatings with standardized methods is important to understand the weakness of each method and tailor future applications for these functional surfaces. In the final chapter, paper and glass slides were used as substrates, and liquid repellent coatings were applied to the surfaces through various modification processes. Wetting properties were compared under tape peeling, dynamic impact, pressing, rotary abrasion and bending tests.