Preparation method of waterborne nano slurry

Abstract

The invention discloses a preparation method of waterborne nano slurry. The method takes polyol as bridge group to firstly modify the surface of the nano particle, increases hydroxyl groups on the surface of the nano particle, improves the dispersity of the nano particle in water medium, and then adopts ball milling technology in the water medium to implement modification of silane coupling agentto directly prepare dispersed and stable waterborne nano concentrated slurry with the concentration of 80-100g / L. The slurry after dilution can be directly used for after finishing process of textiles, thereby endowing the textiles with firm nano function. The preparation method solves the dispersion problem and the binding problem with fabric of nano powder in textile field application at present, thereby expanding the application of nano materials in textile field.

Description

Technical field [0001] The invention relates to a method for preparing an aqueous nano-concentrated slurry, which belongs to the field of functional nano-material preparation. Background technique [0002] Nano-oxide is one of the most researched nano-inorganic functional materials. It has strong photocatalysis, antibacterial and ultraviolet shielding properties, and is widely used in sunscreen cosmetics, fabrics, coatings, plastics, rubber, wastewater treatment and other fields . However, nano-particles have a large specific surface area and high surface energy, and are in a thermodynamically unstable state. They are prone to agglomeration under the action of van der Waals forces in the liquid medium, which will seriously affect the application and performance of nano-materials, thus restricting their popularization. As we all know, the dispersion of nanomaterials often cannot do without chemical modification, that is, the surface of nanoparticles is modified by reactive organi...

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Problems solved by technology

Carrying out surface modification in organic solvent mainly has the following deficiencies: the first is to adopt silane coupling agent to carry out organic surface modification to inorganic material in organic solvent such as toluene, acetone or ethanol, and its cost is high, pollutes big, is not easy to industrialization Production, and because the surface of inorganic materials is polar, it is difficult to disperse in organic solvents. In fact, most of the organic surface modifiers react or attach to the aggregates of nanoparticles, which seriously affects the modification effect; the second is because the inorganic particles The adsorbed hydroxyl group is unstable, so the modification effect is not very ideal, which is not conducive to long-term storage; the third is that the surface of the modified nanoparticles is hydrophobic, which is not suitable for dispersion in water, especially in the field of textile applications. heavily restricted

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