Preparation method of super-hydrophobic nanoscale white carbon black membrane and super-hydrophobic nanoscale white carbon black powder

The invention provides a preparation method of a super-hydrophobic nanoscale white carbon black membrane and super-hydrophobic nanoscale white carbon black powder. The preparation method provided by the invention is characterized by comprising the following steps of 1, preparing nanoscale rice husk ash by a self-propagating combustion method, 2, adding the nanoscale rice husk ash into a NaOH solution having concentration of 1M in a way that each 1g of the nanoscale rice husk ash is added into 10ml of the NaOH solution, carrying out boiling, cooling, removing precipitated impurities, and adjusting a pH value to 3 by a HCl solution to obtain a sodium-silicon solution, and 3, preparing the super-hydrophobic nanoscale white carbon black membrane and the super-hydrophobic nanoscale white carbon black powder by an improved sol-gel method, wherein a used modifier is hydroxyl silicone oil or hexamethyldisilazane. The super-hydrophobic nanoscale white carbon black powder obtained by the preparation method has SiO2 content of 99.64%. The super-hydrophobic nanoscale white carbon black membrane has a wetting contact angle of 166.32 degrees. The super-hydrophobic nanoscale white carbon black membrane and the super-hydrophobic nanoscale white carbon black powder belong to the field of hydrophobic surfaces and can be utilized as water resistance agents, catalysts, catalyst carriers, raw materials of a petrochemical industry, decolorants, delustering agents, rubber strengthening agents, plastic fillers, printing ink thickening agents, metal soft polishing agents, insulative heat-insulation fillers, high-grade daily cosmetic fillers and spraying materials.