posted on 2019-04-18, 00:00authored byXiaotao Zhu, Jingwei Lu, Xiangming Li, Bo Wang, Yuanming Song, Xiao Miao, Zhijuan Wang, Guina Ren
Traditionally.
slippery lubricant infused surfaces, inspired by Nepenthes, suffer from low durability, owing to the
migrating, evaporating, and leaking of the infused lubricants. Herein,
to address this challenge, a lubricant-impregnated coating with long-term
stable slipperiness and self-replenishment properties is presented.
By simple immersion in silicone oil, substrates coving with PDMS coating
gain a slippery, long-lasting lubricated surface. The slippery coating
repels water and corrosive liquids, resists ice and ketchup adhesion,
and exhibits enhanced optical transparency. The resulting coating
maintains its water repellency and slipperiness after mechanical bending,
water jetting, tissue wiping, and knife scratching. The obtained slippery
coating also repels hot liquids such as boiling water, and it also
can be tolerant to thermal treatment at 125 °C for 1 d. More
importantly, the slippery coating can self-lubricate upon lubricated
liquid overlayer depletion through simple diffusion of the lubricant
from the oil absorbed in the cross-linked PDMS network.