Denitration ceramic fiber filter tube and preparation method thereof
A ceramic fiber and filter tube technology, which is applied in separation methods, chemical instruments and methods, filtration separation, etc., can solve the problems of low solid content of titanium dioxide, difficult to guarantee safety, high viscosity, etc., and achieve easy physical adsorption or chemical bonding, sticking High firmness and uniform coating effect
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[0166] The preparation method of the nano titanium dioxide microcapsule provided by the invention comprises the following steps:
[0167] 1) In a protective atmosphere, after dispersing water, emulsifier, wetting agent, emulsifying dispersant, pH regulator and silane coupling agent modified nano-titanium dioxide powder, an aqueous phase is obtained;
[0168] After mixing the propylene-based mixed monomer, crosslinking agent, antioxidant and redox initiator, an oil phase is obtained;
[0169] 2) Under a protective atmosphere, the water phase and the oil phase obtained in the above steps are mixed again, after the reaction, the temperature is raised and matured to obtain a microemulsion containing nano-titanium dioxide microcapsules.
[0170] The present invention first disperses water, emulsifier, wetting agent, emulsifying dispersant, pH regulator and silane coupling agent modified nano-titanium dioxide powder under a protective atmosphere to obtain an aqueous phase;
[0171]...
Embodiment 1
[0257] Nano-titanium dioxide microcapsule mini-emulsion prepared by mini-emulsion polymerization process:
[0258] (1) 100 parts by weight of deionized water, 2.0 parts by weight of emulsifier NP-10 (nonylphenol polyoxyethylene ether 10), 0.1 parts by weight of wetting agent sodium diisobutylnaphthalene sulfonate, 5 parts by weight of emulsified Dispersant polyvinyl alcohol, 2.0 parts by weight of pH regulator 20-25wt.% hydrochloric acid and 40 parts by weight of silane coupling agent modified nano-titanium dioxide powder [1 part by weight of vinyltriethoxysilane+99 parts by weight of sulfuric acid method production Anatase-type nano-titanium dioxide] added to the high-speed shear emulsification pressure reactor in order, nitrogen exhausted oxygen, nitrogen pressurized to 1.0Mpa, started stirring, controlled the speed of 3000r / min, raised the temperature to 40°C, stirred for 60min, and formed the water phase;
[0259] (2) 100 parts by weight of acrylic mixed monomers (5 parts ...
Embodiment 2
[0263] Nano-titanium dioxide microcapsule mini-emulsion prepared by mini-emulsion polymerization process:
[0264] (1) 70 parts by weight of deionized water, 0.25 parts by weight of emulsifier Tween-80, 0.05 parts by weight of wetting agent sodium dialkylsuccinate sulfonate, 1 part by weight of emulsifying and dispersing agent sodium pyrophosphate, 0.002 parts by weight Parts by weight of pH regulator succinic acid and 1 part by weight of silane coupling agent modified nano-titanium dioxide powder [1 part by weight of vinyltriethoxysilane + 100 parts by weight of gas-phase method to produce nano-titanium dioxide] Add high-speed shear emulsification pressure in order Reactor, nitrogen exhaust oxygen, nitrogen pressurized to 0.5Mpa, start stirring, control the speed of 1000r / min, raise the temperature to 25°C, stir for 30minmin, to form the water phase;
[0265] (2) 80 parts by weight of acrylic mixed monomers (5 parts by weight of glycidyl methacrylate, 35 parts by weight of ac...
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