Core-shell structural organic/ inorganic composite hollow porous microsphere and preparation method thereof

Abstract

The invention relates to a core-shell structural organic / inorganic composite hollow porous microsphere and a preparation method thereof. The method comprises the following steps: dissolving styrene,a bifunctionality dimethacrylate organic monomer, a photoinitiator and an organic UV absorbent into a solvent to obtain an electronic injection solution; adding modified titanium dioxide containing two bonds in the surface to the electronic injection solution to disperse uniformly; and performing electrostatic spraying in a visible light condition to obtain the hollow porous microsphere comprisinga crosslinking sphere, titanium dioxide particles and the organic UV absorbent; the crosslinking spheres are hollowed out, the surfaces are porous, and the crosslinking spheres are provided with crosslinking structures; the titanium dioxide particles are wrapped with the crosslinking spheres are in a covalent bond connection manner; the organic UV absorbent is doped in the crosslinking structuresand / or attached to the inner walls of the crosslinking spheres. The method is simple and convenient in processes; the prepared hollow porous microspheres have the advantages of being good in extinction effect, high in UV resistance, high in smelting temperature, and high in thermal decomposition temperature.

Description

technical field [0001] The invention belongs to the field of polymer nanomaterials, and in particular relates to a core-shell structure organic / inorganic composite hollow porous microsphere and a preparation method thereof. Background technique [0002] In recent years, people have increasingly discovered the dangers of ultraviolet radiation. Excessive exposure to ultraviolet rays can lead to skin cancer. Ultraviolet rays can not only degrade the polymer chains in plastics, synthetic resins and rubbers, leading to the aging of materials, but also make the weather resistance of paints and coatings worse, causing paints and coatings to be easily powdered, cracked, or even peeled off. In addition, the paper’s Yellowing, brittleness, etc. are all related to ultraviolet rays. Therefore, the research on UV shielding materials has attracted more and more attention. [0003] Titanium dioxide has outstanding coloring power, hiding power and extinction ability. It is a white pigmen...

AI Technical Summary

Problems solved by technology

Compared with other methods of preparing polymer particles such as precipitation method, reverse suspension cross-linking method, spray drying method, etc., the preparation of microspheres by electrostatic spraying has simple process, strong controllability, environmental protection and no need to use a large amount of emulsifier. The electrostatic spray method is easy to prepare monodisperse particles and the final particles can have a variety of shapes, such as hollow and porous, such as existing literature (Zhan Naiqian. Preparation of polystyrene functional materials by electrospinning[D]. Jilin University, 2010.) reported that polystyrene solution can prepare porous hollow microspheres by electrostatic spray molding, and the prepared polystyrene (PS) hollow microspheres are chemically stable at room temperature and have good processability. However, since the glass transition temperature of polystyrene (PS) is only 100°C, the three-dimensional structure will be destroyed under high temperature conditions, so it cannot be applied to melt processing.

This greatly affects the application of PS hollow microspheres

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