Activated composite adsorption type indoor formaldehyde purification filter screen and preparation method thereof
A formaldehyde purification and composite adsorption technology, which is applied in chemical instruments and methods, separation methods, filtration and separation, etc., can solve the problems of formaldehyde desorption, inability to remove formaldehyde, and secondary pollution, so as to improve purification efficiency and avoid secondary pollution , The effect of high specific surface area
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[0013] The invention provides a method for preparing the activated composite adsorption type indoor formaldehyde purification filter, comprising the following steps:
[0014] (1) soluble silver salt and polyvinylpyrrolidone are ultrasonically dispersed in a solvent to obtain a silver precursor salt solution;
[0015] (2) Mix the phenol raw material, the aldehyde raw material and the catalyst in a solvent evenly, then ripen at 70-120° C. for 1-3 hours, then add foaming agent and foam stabilizer and carry out electrospinning to obtain phenolic resin fibers; Calcining the phenolic resin fibers at 180-230°C for 30-50 minutes in an inert gas atmosphere to obtain porous fibers;
[0016] (3) Add porous fibers and plant powder to the silver precursor salt solution in step (1), react at 80-120°C for 0.5-6h under ultrasonic conditions, and then calcinate for 1-3h under vacuum conditions to obtain Formaldehyde purification fiber;
[0017] (4) The formaldehyde purification fiber is warp...
Embodiment 1
[0028] (1) 6g of silver nitrate and 30g of polyvinylpyrrolidone are dispersed uniformly by ultrasonic in 2LN, N-dimethylformamide, the power of the ultrasonic wave is 300W, and the ultrasonic frequency is 20KHz; the ultrasonic time is 30min to obtain the silver precursor salt solution ;
[0029] (2) Spread 100g Polygonatum Polygonatum, 100g Evergreen, and 100g Agave evenly on a breathable support, and at a temperature of 45°C, air-dry the plants until the water content is 5%, collect the volatilized water of the plants through condensation, and obtain air-dried Plants and plant extracts; crushing and grinding air-dried plants to obtain plant powder with a particle size of 120 mesh;
[0030] Mix 260g resorcinol, 250g benzaldehyde, 20g zinc acetate, and 200mL of the above-mentioned plant extract in 3L N,N-dimethylformamide, then mature at 100°C for 1.5h, then add 4.2g of azobis Carry out electrospinning after formamide and 0.8g silicone oil foam stabilizer (Shanghai Baiang Chem...
Embodiment 2
[0034] (1) Ultrasonic dispersion of 10g silver nitrate and 40g polyvinylpyrrolidone in 2L tetrahydrofuran is uniform, the power of the ultrasound is 300W, and the ultrasound frequency is 20KHz; the ultrasound time is 30min to obtain a silver precursor salt solution;
[0035] (2) Spread 100g of lilies, 150g of tulips, 150g of oleifera, 100g of cactus, and 50g of begonias evenly in a ventilated support. At a temperature of 45°C, air-dry the plants to a water content of 8%, and collect the volatilized water from the plants by condensation water, respectively to obtain air-dried plants and plant extracts; the air-dried plants are pulverized and ground to obtain plant powders with a particle size of 200 mesh;
[0036] Mix 220g of hydroquinone, 220g of paraformaldehyde, 30g of sulfuric acid, and 300mL of the above-mentioned plant extract in 3L of tetrahydrofuran, then mature at 90°C for 2h, then add 6g of azodicarbonamide and 1g of silicone oil foam stabilizer ( Shanghai Baiang Chem...
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