Preparation method of anticorrosive paint of polyaniline modified mesoporous molecular sieve
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A technology of mesoporous molecular sieve and anti-corrosion coating, applied in anti-corrosion coatings, epoxy resin coatings, coatings and other directions, can solve problems such as mechanical properties disadvantage, environmental hazards, etc. improved effect
Inactive Publication Date: 2012-08-22
蓬莱禄源漆业有限公司
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However, since these products are basically solvent-based, they are not only ha...
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Embodiment 1
[0050] (1) Preparation of polyaniline-modified mesoporous molecular sieves:
[0051] 1) Add 20 parts of aniline monomer and 50 parts of nanometer mesoporous silica (MCM-41) to 900 parts of 25% acid aqueous solution while stirring at room temperature, and shake in the ultrasonic reactor for 5 Hour;
[0052] 2) Under uniform mechanical stirring, gradually add 20 parts of ferrous sulfate with a mass fraction of 2% and 50 parts of potassium dichromate acidic solution with a concentration of 8% in order, continue to react for 8 hours after adding, filter and wash;
[0053] 3) The obtained product was dried in a vacuum drying oven at 60°C for 24 hours to obtain a mesoporous molecular sieve MCM-41 packing whose surface and channels were covered with intrinsic polyaniline.
[0054] (2) Preparation of anti-corrosion coating:
[0055] 1) Take 100 parts of water-based epoxy resin and 100 parts of water, add 0.6 parts of ethylene oxide oligomer, 70 parts of dibutyl phthalate, and stir e...
Embodiment 2
[0058] (1) Preparation of polyaniline-modified mesoporous molecular sieves:
[0059] 1) Add 10 parts of aniline monomer and 30 parts of nanometer mesoporous silica (SBA-15) into 500 parts of 25% acid aqueous solution while stirring at room temperature, and shake in an ultrasonic reactor for 3 Hour;
[0060] 2) Under uniform mechanical stirring, gradually add 10 parts of ferrous sulfate with a mass fraction of 2% and 30 parts of ammonium persulfate acidic solution with a concentration of 5% in order, continue to react for 8 hours after adding, filter and wash;
[0061] 3) The obtained product was dried in a vacuum drying oven at 60°C for 24 hours to obtain a mesoporous molecular sieve SBA-15 packing whose surface and channels were covered with intrinsic polyaniline.
[0062] (2) Preparation of anti-corrosion coating:
[0063] 1) Take 150 parts of water-based epoxy resin and 150 parts of water, add 0.3 parts of methyl silicone oil, 60 parts of octyl phthalate, and stir evenly;...
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Abstract
The invention provides a preparation method of an anticorrosive paint of a polyaniline modified mesoporous molecular sieve and relates to the anticorrosive paint. The preparation method comprises the following steps of: firstly, polymerizing polyaniline in a pore channel of a filler of a mesoporous molecular sieve with a pore channel structure and on the outer surface of a mesoporous molecular sieve grain in situ to obtain a polyaniline coated and modified inorganic filler; then, mixing the polyaniline coated and modified inorganic filler with aqueous epoxy resin and curing to obtain the anticorrosive paint; forming the polyaniline on the outer surface of the mesoporous molecular sieve grain in situ; extending the polyaniline which is polymerized in the pore channel of the mesoporous molecular sieve grain in situ to a pore opening of a mesopore to generate a stronger interface interactive effect with an epoxy resin matrix, so as to increase the compatibility and prevent the nano grains from being clustered in the resin matrix, and also increase the cross-linking density of the coating. The polyaniline has the anticorrosive performance so that the anticorrosive performance of the coating is improved. The content of the polyaniline in the filler is very low, the synthesis process is simple and the anticorrosive paint does not need to be dissolved and can be directly used, so that the use is convenient and the cost is low.
Description
technical field [0001] The invention relates to an anti-corrosion coating, in particular to a preparation method of a polyaniline-modified mesoporous molecular sieve anti-corrosion coating. Background technique [0002] Metal corrosion involves almost all sectors and fields of the national economy on a large scale, which brings immeasurable losses to the national economy. Our country's annual corrosion loss accounts for 6% of GDP. Strengthening anti-corrosion work not only has obvious economic benefits, but also has significant social benefits. According to Japanese statistics, among all kinds of anti-corrosion countermeasures, surface coating accounts for 62.55%, and heavy-corrosion coatings and special coatings occupy a particularly important position, which are the types of coatings that are mainly developed in the world. After the 18th century, coatings developed rapidly and formed an industrial system, which was mainly based on the preparation of paints. In the 20th ce...
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