Preparation method for casein-based nanometer TiO2 hybrid composite emulsion and coating material
A hybrid composite, casein technology, applied in coatings, antifouling/underwater coatings, paints containing biocides, etc., to achieve the effect of imparting anti-ultraviolet self-cleaning performance and good application prospects
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[0026] Casein-based nano-TiO of the present invention 2 The preparation method of hybrid composite emulsion specifically comprises the following steps:
[0027] Step 1: Caprolactam-modified casein / nano-TiO 2 Preparation of two-component Pickering emulsifier
[0028] casein-based nano-TiO 2 The parts by weight of the hybrid composite emulsion is 100 parts. According to the parts by weight, 6.6 to 8.6 parts of casein, 1.4 to 2.2 parts of triethanolamine, and 55.0 to 63.0 parts of deionized water are added to the reactor. Dissolve casein at 65°C; then raise the temperature to 72-80°C, add 12.5-15.7 parts of caprolactam aqueous solution with a mass concentration of 0.3g / mL-0.8g / mL dropwise within 20-30min, and keep stirring for 90 ~130min, naturally cool to 10~30℃; then adjust the pH value to 4.0~8.0, then add 1.2~2.0 parts of the mixture of coupling agent and precursor to the reaction system, keep the reaction for 10~30min, and then heat up to 72 ~80℃, heat preservation react...
Embodiment 1
[0036] 1) Caprolactam modified casein / nano-TiO 2 Preparation of two-component Pickering emulsifier
[0037] casein-based nano-TiO 2 The parts by weight of the hybrid composite emulsion is 100 parts by weight, 6.6 parts of casein, 1.4 parts of triethanolamine, and 63.0 parts of deionized water are added to the reactor, and the casein is dissolved at 60 ° C; then Raise the temperature to 72°C, add 12.5 parts of a caprolactam aqueous solution with a concentration of 0.5g / mL dropwise to the above solution within 30 minutes, stir for 90 minutes, then cool naturally to 10°C; then adjust the pH value of the emulsion to 4.0, and add 1.2 A mixture of 3-(methacryloyloxy)propyltrimethoxysilane and tetrabutyl titanate with a mass ratio of 5:1 was incubated for 10 minutes, then heated to 72°C for 90 minutes to obtain caprolactam Modified casein / nano-TiO 2 Two-component Pickering emulsifier;
[0038] 2) Casein-based nano-TiO 2 Preparation of Hybrid Composite Emulsion
[0039] At 72°C,...
Embodiment 2
[0042] 1) Caprolactam modified casein / nano-TiO 2 Preparation of two-component Pickering emulsifier
[0043] casein-based nano-TiO 2 The parts by weight of the hybrid composite emulsion is 100 parts by weight, 7.1 parts of casein, 1.6 parts of triethanolamine, and 61.0 parts of deionized water are added to the reactor, and the casein is dissolved at 62 ° C; then Raise the temperature to 74°C, add 13.3 parts of caprolactam aqueous solution with a concentration of 0.4g / mL dropwise to the above solution within 20min, stir for 100min, then cool naturally to 15°C; then adjust the pH value of the emulsion to 5.0, and add 1.4 A mixture of 3-aminopropyltriethoxysilane and isopropyl titanate with a mass ratio of 5:2 was incubated for 15 minutes, then heated to 74°C, and incubated for 100 minutes to obtain caprolactam-modified casein / Nano-TiO 2 Two-component Pickering emulsifier;
[0044] 2) Casein-based nano-TiO 2 Preparation of Hybrid Composite Emulsion
[0045] At 74°C, the cap...
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