Method for producing self-cleaning glass-ceramic by using waste glass

Abstract

The present invention provides a method for producing self-cleaning glass-ceramic by using waste glass. The method comprises the following steps: (1) adopting waste glass as a raw material to produce glass-ceramic; (2) mixing an organic silicide, ethanol and water to prepare a silica sol coating fluid, adopting a dipping-pulling method to coat a silicon film on the glass-ceramic surface; (3) hydrolyzing a titanium dioxide precursor sol to prepare a titanium dioxide coating liquid, adopting the dipping-pulling method to coat a titanium dioxide film on the silicon film. With the present invention, adverse effects on the environment due to the waste glass can be reduced or eliminated; the waste can be changed into the treasure; the waste glass is effectively utilized to produce the glass-ceramic product with comprehensive self-cleaning ability and good effect; significant economic benefits and social benefits are provided.

Description

technical field [0001] The invention relates to the treatment of industrial waste, in particular to a method for producing self-cleaning glass-ceramic from waste glass. Background technique [0002] Due to different uses, waste glass usually contains oxides such as aluminum, calcium, sodium, and boron in addition to silicon dioxide, and it is difficult to purify. Therefore, the general mode of treatment is to make low-grade, low-value glass products. What's more, waste glass is directly stacked in the open air or landfilled, occupying a large amount of cultivated land, which not only seriously pollutes the environment, but also wastes precious resources. [0003] The Chinese patent with the publication number CN 1919765A discloses a glass-ceramic plate made of waste glass. The waste glass is selected, cleaned and crushed into glass powder and mixed with other components to prepare raw materials, and then melted, water quenched, Molding, crystallization, and kiln to make gl...

AI Technical Summary

Problems solved by technology

The cleaning and cleaning of these building materials, especially the cleaning of the exterior finishes of high-rise buildings, is a costly, poorly effective, time-consuming and labor-intensive task.

In particular, there are pores on the surface of the glass-ceramic plate products produced by the aforementioned patents, which are easy to hide dirt and are difficult to clean. Therefore, after long-term use of the main body of the building (especially exposed to wind, sun and air pollution) environment) full of stains, affecting the decorative effect

[0005] At present, the common methods of producing self-cleaning glass are mainly the following two categories: one is to use organic polymers such as organosilicon compounds, fluorosilanes and fluorine-containing compounds to improve the chemical properties of the film surface materials, because they contain a large number of atomic groups with low surface energy group, which can greatly reduce the surface energy of the material and enhance its hydrophobicity, but this method cannot resist oil stains, and the one-sided self-cleaning function is still not conducive to the cleaning and cleaning of the glass; the second is to plate / coat a layer of titanium dioxide film on the glass Improve the surface structure of the film. Because titanium dioxide can produce good photocatalytic properties under the action of (ultraviolet) light energy and has superhydrophilicity, it can endow the glass with self-cleaning ability, but this method only forms a layer of titanium dioxide on the surface of the material. Films cannot fill the inherent pores and other defects on the surface of glass-ceramic, resulting in greatly reduced self-cleaning effect