Silicon dioxide nanowire composite material as well as preparation method and application thereof
A technology of silicon dioxide and composite materials, applied in textiles, papermaking, coatings, etc., can solve the problems of non-uniform dispersion, complicated preparation process and high reaction temperature, and achieve the effects of low cost, simple process and mild reaction conditions
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Embodiment 1
[0035] Fully dissolve 20.0g polyvinylpyrrolidone in 200ml n-amyl alcohol, add 20.0ml ethanol, 6.94ml sodium citrate aqueous solution (0.18mol / L), 4.0ml ammonia water, 2.0ml tetraethyl orthosilicate, 0.2ml octadecyl Alkyltrimethoxysilane, 0.2ml γ-aminopropyltriethoxysilane, each addition of the above-mentioned reagents should be fully mixed to obtain a dispersion of silica nanowire precursor, and left at room temperature for 24h to form Precipitate, separate the precipitate to obtain superhydrophobic silica nanowires; put superhydrophobic silica nanowires into the reactor after centrifugal drying, add 70ml N,N-dimethylformamide to fully dissolve, then add 0.5 ml of 2-bromoisobutyryl bromide and 0.5 ml of triethylamine were mechanically stirred for 24 hours, centrifuged, and dried to obtain bromine-containing silicon dioxide nanowire powder. Add the dried silica nanowires containing bromine on the surface into a Schlenk bottle, add 20ml of anisole, 13.75ml of styrene, 5.75ml of ...
Embodiment 2
[0044] Fully dissolve 15.0g polyvinylpyrrolidone in 200ml n-amyl alcohol, then add 10.0ml ethanol, 6ml potassium citrate aqueous solution (0.18mol / L), 1.0ml ammonia water, 2.0ml tetraethyl orthosilicate, 0.25ml ten Trifluorooctyltrimethoxysilane, 0.25ml γ-aminopropyltriethoxysilane, each addition of the above-mentioned reagents should be fully mixed to obtain a silica nanowire precursor dispersion, and stand at room temperature After 24 hours, a precipitate was formed, and the precipitate was separated to obtain superhydrophobic silica nanowires; after the superhydrophobic silica nanowires were centrifuged and dried, they were placed in a reactor, and 50 ml of anisole was added to fully dissolve them, and then 0.6 ml of 2-Bromoisobutyryl bromide and 0.6ml of pyridine were mechanically stirred for 24 hours, centrifuged and dried to obtain bromine-containing silicon dioxide nanowire powder. Add the dried silica nanowires containing bromine on the surface into a Schlenk bottle, a...
Embodiment 3
[0047] Fully dissolve 20.0g polyvinylpyrrolidone in 200ml n-amyl alcohol, then add 30.0ml ethanol, 4.5ml sodium citrate aqueous solution (0.18mol / L), 4.0ml ammonia water, 5.0ml tetraethyl orthosilicate, 1.0ml Tridecafluorooctyltriethoxysilane, 1.0ml γ-aminopropyltriethoxysilane, each addition of the above-mentioned reagents should be fully mixed to obtain a dispersion of silica nanowire precursor, statically After leaving for 24 hours, a precipitate was formed, and the precipitate was separated to obtain superhydrophobic silica nanowires; after the superhydrophobic silica nanowires were centrifuged and dried, they were placed in a reactor, and 120 ml of tetrahydrofuran was added to fully dissolve them, and then 1.2ml of 2 -Bromoisobutyryl bromide and 1.2ml of tetraethylenepentamine were mechanically stirred for 24 hours, the dispersion was purified by centrifugation, and dried to obtain bromine-containing silicon dioxide nanowire powder. The dried silica nanowires containing b...
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