Preparation method of titanium dioxide and zinc oxide composite modified polymethyl methacrylate antibacterial coating

Abstract

The invention discloses a preparation method of a titanium dioxide and zinc oxide composite modified polymethyl methacrylate antibacterial coating. The antibacterial coating is prepared from the following raw materials: acrylate emulsion, titanium dioxide, dicyclopentadiene, styrene, paraffin, coloring pigment, organic bentonite, ethyl acetate, nano-zinc oxide, a silane coupling agent KH-570, polymethyl methacrylate, 2,2-azodiisobutyronitrile, lithium hydroxide monohydrate and the like. According to the preparation method disclosed by the invention, the titanium dioxide is introduced into modified polyester resin, so that the formed hybrid material has an original photocatalytic antibacterial effect of titanium dioxide; on the basis, surface modification of the nano zinc oxide is carried out by using the silane coupling agent, and the insertion of the nano-zinc oxide is realized through simple controllable conditions at lower temperature, so that the antibacterial unicity of the titanium dioxide material is filled up and a composite multi-level adsorption antibacterial effect is achieved. The obtained coating has excellent properties of high stability, bacteriostatic and antibacterial effects, convenience in use, greenness, environment friendliness and better use value.

Description

technical field [0001] The invention relates to the technical field of architectural coatings, in particular to a preparation method of titanium dioxide and zinc oxide composite modified polymethyl methacrylate antibacterial coatings. Background technique [0002] With the development of modern science and technology, the increase in the number of urban buildings has increased the demand for architectural coatings. Coatings have the effect of covering various defects on the surface of buildings, and can also prevent or delay oxygen, moisture, ultraviolet rays and others in the air. Hazardous substances damage buildings, thereby prolonging the service life of buildings. In this context, the demand for functional architectural coatings has also increased substantially, and the antibacterial and antibacterial properties against microbial pathogens have become a research hotspot in the coatings industry. [0003] When the temperature of the wall is 23-38°C and the relative humi...

AI Technical Summary

Problems solved by technology

[0005] Nano-zinc oxide has excellent chemical stability and is a cheap multifunctional inorganic filler. It has many properties such as anti-ultraviolet radiation, photoluminescence, near-infrared reflection, photocatalysis, and antibacterial. The energy is relatively high, the surface tension is enhanced, and it is easy to agglomerate. It is difficult to disperse evenly when directly added to the polymer matrix, and the expected use effect cannot be achieved.

Polymethyl methacrylate has high transparency and good comprehensive mechanical properties. It can be used as a coating to reflect the multifunctional advantages, but the polarity of nano-zinc oxide and polymethyl methacrylate is different, the compatibility is poor, and phase separation is easy to occur. The materials obtained by combining nano-zinc oxide and polymethyl methacrylate by blending method often have low transparency, which affects practicability