Soil Adhesion and Abrasive Wear of PTFE-Matrix Composites

Behaviour of soil adhesion and wettability of water to PTFE-and PTFE - PPS -Al₂O₃ particle composites and their abrasive wear are studied. Dispersion of Al₂O₃ particles with proper content and size in PTFE and PTFE-50%(wt) PPS can increase the advancing contact angle of water and maintains excellent property of anti-adhesion of soil to the surfaces. The surface of the composites is similar to the cuticle of some soil animals in bydrophobicity and unsmoothed nature. Composites dispersed with Al₂O₃ particles in suitable content possess excellent abrasive resistance and PPS(50%wt) can further improve abrasive resistance of the composites.