PMC

Abrasion resistance test of hydrophobic surface on wood. (a) Illustration of the sandpaper abrasion test; (b) cross section of wood before abrasion test; (c) cross section of wood after abrasion test; (d) tangential section of wood before test; (e) tangential section of wood after abrasion test; (f) the water contact angle as a function of number of abrasion cycles for hydrophobic wood surface.

(a) The average coated area as a function of abrasion cycles. (b) Diffuse reflectance (DR) evaluated at 400 nm as a function of number of abrasion cycles. The inset displays the development of DR for a coating with SiO₂/K₂O = 4 at higher numbers of abrasion cycles.

a) CA value versus the abrasion cycles of the Cotton-g-PHMA (DG = 37.0%) and the Cotton-g-PLMA (DG = 21.8%); Inserted images: the image of a water droplet on the Cotton-g-PLMA (DG = 21.8%) before (left) and after (right) an abrasion test of 9,000 cycles; b) SEM image of the Cotton-g-PHMA (DG = 37.0%) after an abrasion test of 8,000 cycles; c) SEM image of the Cotton-g-PLMA (DG = 21.8%) after an abrasion test of 9,000 cycles; d) The temperature measuring of the iron. e) CA value before and after the steam ironing versus the abrasion cycles of the Cotton-g-PHMA (DG = 37.0%); f) CA value before and after the steam ironing versus the abrasion cycles of the Cotton-g-PLMA (DG = 21.8%).