A kind of tannic acid pyridine quaternary ammonium salt and its preparation method and application
A tannic acid pyridine, quaternary ammonium salt technology, applied in the directions of botanical equipment and methods, application, sugar derivative preparation, etc., can solve problems such as allergic reactions, toxic reactions, bacterial resistance, etc., and achieve biocompatibility The effect of improving property, good stability and antibacterial effect
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Embodiment 1
[0022] A kind of preparation method of tannic acid pyridine class quaternary ammonium salt, comprises the following steps:
[0023] (1) Prepare tannic acid aqueous solution (0.05mol / L) and 4-dimethylaminopyridine (DMAP) aqueous solution (0.2mol / L);
[0024] (2) Take 10mL of tannic acid aqueous solution in a container, slowly add 10mL of 4-dimethylaminopyridine aqueous solution dropwise under stirring conditions, the solution changes from yellow transparent to yellow-green particles in suspension, and after the reaction is completed, perform suction filtration to obtain The filter residue was washed three times with pure water, and treated in a vacuum oven at room temperature of 0.085Mpa for 12 hours. The product turned dark green. After taking it out, it was ground into powder and stored in a desiccator.
Embodiment 2
[0026] A kind of preparation method of tannic acid pyridine class quaternary ammonium salt, comprises the following steps:
[0027] (1) Prepare tannic acid aqueous solution (0.05mol / L) and 4-aminopyridine (4-NH 2 Py) aqueous solution (0.2mol / L);
[0028] (2) Take 10mL of tannic acid aqueous solution in a container, slowly add 10mL of 4-aminopyridine aqueous solution dropwise under stirring conditions, the solution changes from yellow transparent to white particles in suspension, after the reaction is completed, carry out suction filtration to obtain the filter residue, use Wash it with pure water three times, and treat it in a vacuum drying oven at 0.085Mpa for 12 hours at room temperature. The product is off-white. Take it out and grind it into powder, and store it in a desiccator.
Embodiment 3
[0030] A kind of preparation method of tannic acid pyridine class quaternary ammonium salt, comprises the following steps:
[0031] (1) Prepare tannic acid aqueous solution (0.05mol / L) and 2-aminopyridine (2-NH 2 Py) aqueous solution (0.2mol / L);
[0032] (2) Take 10mL of tannic acid aqueous solution in a container, and slowly add 10mL of 2-aminopyridine aqueous solution dropwise under stirring conditions, the solution changes from yellow transparent to white particles suspended, after the reaction is completed, carry out suction filtration to obtain the filter residue, use Wash it with pure water three times, and treat it in a vacuum drying oven at 0.085Mpa for 12 hours at room temperature. The product changes from white to dark green. Take it out and grind it into powder, and store it in a desiccator.
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