Preparation and Properties of Superhydrophobic Materials for Ecological Restoration

Abstract:

In order to improve the water-holding capacity of sandy soil， and produce the super-hydrophobic material for ecological restoration ， this paper discusses the influence of raw materials， in which sandy soil is chosen as the core material， on impermeability and air permeability by adjusting the types and content of film covering material， changing the gradation of the core material and constructing nano rough structure on the surface of the core material. The results show that when selecting the film covering material， the surface energy should be less than 30mN·m^-1. To improve the impermeability of the material， the standard deviation α of the core material distribution should be greater than 0.35. In the case of material with low surface energy， adding nano material to increase the roughness is the key to further improve the impermeability of the super-hydrophobic material for ecological restoration. After filming the desert sand with 1% fluorosilicone resin and adding 0.3% nano-silica to construct nano rough structure， the super-hydrophobic material for ecological restoration obtained can withstand hydrostatic pressure up to 48cm.