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

Abstract

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.

Description

technical field [0001] The invention provides a superhydrophobic nanometer white carbon black film and a preparation method of white carbon black powder, belonging to the technical field of inorganic materials. Background technique [0002] China is the largest rice producer in the world. The annual output of rice in 2011 was about 228.14 million tons. As the main by-product of rice processing, rice husk accounts for 20%-30% of the weight of rice. It is a cheap and easy-to-collect renewable resource. However, the vast majority of rice processing enterprises still do not have a reasonable and effective method for utilizing rice husks, so a large amount of rice husks are discarded as agricultural waste or used as primary fuels, and the comprehensive utilization rate is less than 10%, and most of the burned rice husk ash has no Disposal is a waste of resources and pollutes the environment. White carbon black is a kind of ultrafine and active silica particles, which is a white...

AI Technical Summary

Problems solved by technology

However, the vast majority of rice processing enterprises still do not have a reasonable and effective method for utilizing rice husks, so a large amount of rice husks are discarded as agricultural waste or used as primary fuels, and the comprehensive utilization rate is less than 10%, and most of the burned rice husk ash has no processing, which wastes resources and pollutes the environment

The preparation of white carbon black is mostly produced by relatively expensive chemical raw materials, with high cost and low output