A kind of nano silicon dioxide coated quaternary ammonium salt chitosan composite antibacterial agent and preparation method thereof
A quaternary ammonium salt chitosan, nano-silica technology, applied in the directions of botanical equipment and methods, biocides, disinfectants, etc., can solve the problems of antibacterial application limitation, insufficient thermal performance, difficult to add, etc., to achieve antibacterial properties, inhibiting bacterial growth, reducing the effect of degradation
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Embodiment 1
[0026] The raw material ratio (parts by weight) of the nano-silica coated quaternary ammonium chitosan composite antibacterial agent of the present embodiment is as follows: 1 part of quaternary ammonium chitosan aqueous solution, 1 part of liquid paraffin, Span-80 emulsification 0.3 parts of agent, 5 parts of polyvinyl alcohol aqueous solution, and 5 parts of tetraethyl orthosilicate solution. Among them, the degree of substitution of quaternary ammonium chitosan is 50-90%, the relative molecular mass is 100,000-800,000, and the solid content of the quaternary ammonium chitosan solution is 2%; The solid content of the vinyl alcohol aqueous solution is 3%; the ratio by weight of tetraethyl orthosilicate, ethanol and deionized water in the tetraethyl orthosilicate solution is 3:10:10.
[0027] The nano silicon dioxide coated quaternary ammonium chitosan composite antibacterial agent of the present embodiment is prepared according to the following steps:
[0028] Step 1. Disper...
Embodiment 2
[0038] The raw material ratio (parts by weight) of the nano-silica coated quaternary ammonium chitosan composite antibacterial agent of the present embodiment is as follows: 1 part of quaternary ammonium chitosan aqueous solution, 2 parts of liquid paraffin, emulsified by Span-60 0.3 parts of agent, 5 parts of polyvinyl alcohol aqueous solution, and 5 parts of tetraethyl orthosilicate solution. Among them, the degree of substitution of quaternary ammonium chitosan is 50-90%, the relative molecular mass is 100,000-800,000, and the solid content of the quaternary ammonium chitosan solution is 5%; the relative molecular mass of polyvinyl alcohol is 100,000, and the polyvinyl alcohol The solid content of the vinyl alcohol aqueous solution is 5%; the ratio by weight of tetraethyl orthosilicate, ethanol and deionized water in the tetraethyl orthosilicate solution is 3:10:10.
[0039] The nano silicon dioxide coated quaternary ammonium chitosan composite antibacterial agent of the pr...
Embodiment 3
[0050] The raw material ratio (parts by weight) of the nano-silica coated quaternary ammonium chitosan composite antibacterial agent of the present embodiment is as follows: 1 part of quaternary ammonium chitosan aqueous solution, 2 parts of liquid paraffin, Span-80 emulsification 0.6 parts of agent, 10 parts of polyvinyl alcohol aqueous solution, and 8 parts of tetraethyl orthosilicate solution. Among them, the degree of substitution of quaternary ammonium chitosan is 50-90%, the relative molecular mass is 100,000-800,000, and the solid content of the quaternary ammonium chitosan solution is 10%; The solid content of the vinyl alcohol aqueous solution is 6%; the ratio by weight of tetraethyl orthosilicate, ethanol and deionized water in the tetraethyl orthosilicate solution is 3:10:10.
[0051] The nano silicon dioxide coated quaternary ammonium chitosan composite antibacterial agent of the present embodiment is prepared according to the following steps:
[0052] Step 1. Dis...
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Abstract
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