Titanium dioxide powder and indoor air purification type multifunctional inorganic ecological coating including same
A titanium dioxide, multi-functional technology, applied in the field of inorganic compounds, can solve the problems of short shelf life of highly reactive diluents, insufficient effectiveness of low-reactivity diluents, difficult coating compositions, etc., to achieve good film formation and polymer diffusion rate, inhibit The generation and release of VOC, and the effect of improving photocatalytic activity
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Embodiment 1
[0086] Titanium dioxide particles coated with a porous silica layer were prepared by the following method: (1) oleic acid was dissolved in methanol at a concentration of 0.2 M, and 0.10 g of TiO 2 The powder (purchased from Sinopharm Chemical Reagent, with an average particle size of about 30 nm) was dispersed in 20 mL of this solution, then sonicated for 10 min, and then stirred at 80 °C until the methanol was completely evaporated to make the TiO 2 (2) Add 80 mL of deionized water containing 80 mg of bovine serum albumin (BSA) to the solution, and then sonicate for 20 minutes to form a uniform O / W microemulsion; (3) Mix 14.0 mmol TEOS A mixture of APTES and 2 mmol APTES was added to the solution and vigorously stirred for 15 minutes to prepare a silica shell around the O / W microemulsion, which was then aged at room temperature for 2 hours, and then aged at about 80 ° C for 24 hours to form Rigid silica network; (4) The resulting solid was washed several times with deionized ...
Embodiment 2
[0088] Protect the reaction vessel with nitrogen, then add the initial charge to the reaction vessel, wherein the initial charge contains 250 parts by weight of water and 0.0001 parts by weight of HEDTA-3NA; then use a water bath to heat the flask to 90 ° C, continuously A monomer feed and an aqueous feed were added, and the continuous feed was completed within 4 hours, wherein the monomer feed contained 110 parts by weight of methyl acrylate, 60 parts by weight of methyl methacrylate, 10 parts by weight of methacrylic acid Glycidyl ester, 6 parts by weight of γ-methacryloxypropyl trimethoxysilane, the aqueous feed contains 60 parts by weight of deionized water, 2.0 parts by weight of dodecyl diphenyl ether disulfonic acid Sodium surfactant, 0.3 parts by weight of sodium persulfate, and 0.2 parts by weight of sodium bicarbonate were added. After the addition, the latex was kept at 90° C. for 1 hour to complete the polymerization, and then filtered to obtain a latex polymer.
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Embodiment 3
[0092] In a 500 mL flask equipped with a mechanical stirrer, a thermometer and a condenser, 130 g of 2-hydroxyethyl methacrylate and 0.2 g of monomethyl ether hydroquinone were placed to bring the reactor to about 50 ° C, and then 59.16 g, phosphorus pentoxide is slowly added to the reactor, the temperature is kept below 50°C, the reaction is carried out under nitrogen atmosphere for 3 hours, cooled to room temperature, filtered, the pH value of the system is adjusted to about 8.0 with sodium hydroxide solution, filtered, and then Adjust the pH value of the filtrate to 3-6, let it stand, filter out the precipitate, wash, and dry to obtain the surfactant represented by formula (I).
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