Application of O-chlorotriazine-type chitosan quaternary ammonium salt to antibacterial finishing of natural fabrics
A chitosan quaternary ammonium salt, chlorotriazine type technology, applied in the direction of resisting vector-borne diseases, animal fibers, plant fibers, etc., can solve the problems of low fastness, high cost, high finishing temperature, and achieve antibacterial properties. The effect of lasting effect, improving bonding fastness and saving production cost
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[0028] 1. Preparation of O-chlorotriazine chitosan quaternary ammonium salt
[0029] Synthesis of N,N,N-trimethyl chitosan: Dissolve 5g chitosan in 15mL formic acid, add 30mL 37% formaldehyde solution and 45mL water, react at 70°C for 118h, then use 40% NaOH solution Adjust the pH to 12, filter with suction, wash with water until neutral, and dry in vacuum to obtain N,N-dimethyl chitosan (DMC). Dissolve 2 g of DMC in 100 mL of N-methyl-2-pyrrolidone, add 16 mL of methyl iodide , reacted at 40°C for 120h, then poured into ethanol / ether (V / V=1:1) mixed solvent to precipitate, washed, dialyzed with 1% NaCl solution and water respectively, and freeze-dried to obtain N,N,N-trimethyl Chitosan.
[0030] Preparation of O-chlorotriazine chitosan quaternary ammonium salt: Accurately weigh 0.2 g of NaOH, and dissolve it in a 50 mL flask with 10 ml of distilled water under an ice bath at 0-5° C. to obtain a NaOH solution. Accurately weigh 0.45 g of cyanuric chloride, add it to the NaOH ...
Embodiment 1
[0037] The application of O-chlorotriazine type chitosan quaternary ammonium salt in the antibacterial finishing of cotton fabrics comprises the following steps:
[0038] Bath ratio: 1:10, put the cotton fabric in an aqueous solution containing 4% (owf) O-chlorotriazine chitosan quaternary ammonium salt, keep it warm at 60°C for 1h, add 15g / L Na 2 CO 3 , then raise the temperature to 95°C-100°C, keep it warm for 30 minutes, pour off the finishing liquid, wash the cotton fabric with cold water-hot water-cold water, and then dry it.
[0039] The reaction of cotton fabric of the present invention and O-chlorotriazine type chitosan quaternary ammonium salt is as follows:
[0040]
[0041] Table 1 Properties of cotton fabrics after antibacterial finishing
[0042]
[0043] The performance test of the cotton fabric after the antibacterial finishing is as shown in Table 1, and the bacteriostatic rate of the cotton fabric obtained is high to E.coli (escherichia coli) and S.aur...
Embodiment 2
[0045] The application of O-chlorotriazine type chitosan quaternary ammonium salt in wool fabric antibacterial finishing comprises the steps:
[0046] Bath ratio 1:10, soak the wool fabric in 50°C water for 15min, add 2% (owf) O-chlorotriazine type chitosan quaternary ammonium salt, keep warm at 60°C for 1h, then heat up to 95°C-100°C , keep warm for 30 minutes, pour off the finishing liquid, wash the woolen fabric in cold water-hot water-cold water, and then dry it.
[0047] The reaction of wool fabric and O-chlorotriazine type chitosan quaternary ammonium salt among the present invention is as follows:
[0048]
[0049] Table 2 Properties of wool fabric after antibacterial finishing
[0050]
[0051] The performance test of the wool fabric after antibacterial finishing is as shown in Table 2, and the bacteriostatic rate of the wool fabric obtained is high to E.coli (escherichia coli) and S.aureus (staphylococcus aureus), according to GB / T 3921-2008 After soaping, the a...
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