Facile preparation of superhydrophobic and high oleophobic polymer composite coatings with self-cleaning, heat-resistance and wear-resistance

摘要

Superhydrophobic and high oleophobic PPS-matrix composite coatings with excellent self-cleaning, bending/heat/wear-resistance have been successfully prepared by a simple spray method through designing hierarchical structures and modifying with low surface energy groups in this work. The test results showed that the polyphenylene sulfide (PPS)/43 wt.% fluorinated ethylene propylene (FEP)/polyetheretherketone (PEEK)/1 wt.% polydimethylsiloxane (PDMS) composite coatings exhibited superhydrophobic and high oleophobic simultaneously, with the highest contact angles of water, glycerine, ethylene glycol, crude oil and oil-water mixture up to 173 +/- 1.5 degrees, 156 +/- 1.3 degrees, 153 +/- 1.3 degrees, 151 +/- 1.3 degrees and 155 +/- 1.3 degrees, respectively. The wear life of the coating was recorded to be the longest reaching about 30 h without any surface damage until the wear test is terminated, which was 10 times of the PPS/PEEK coating. The intrinsic brittleness of PPS/PEEK coating can be avoided by the addition of FEP. Moreover, the coating can also keep superhydrophobic after immersing in strong acid and base solutions for 15 days. Under the condition of 200 degrees C for 1 h, the weight losses of the coatings were less than 3 % of the coating, showing outstanding heat-resistance. Under the condition of dirty, the coating also demonstrated the excellent self-cleaning effect, protecting substrates from pollution in practical applications. It is believed that our research provides a new approach to extending the life span of superhydrophobic coatings for petroleum pipeline.