Antibacterial non-woven fabric and preparation method thereof
A technology of non-woven fabrics and antibacterial agents, which is applied in the field of antibacterial non-woven fabrics and its preparation, can solve the problems of not improving the mechanical properties of non-woven fabrics, unsustainable antibacterial effects, and a large number of raw materials for preparation, and achieve excellent broad-spectrum antibacterial properties, Excellent antibacterial performance and chemical stability, mechanical performance and hydrophilic performance improvement effect
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[0032] See figure 1 As shown, the present invention provides a method for preparing an antibacterial non-woven fabric, which includes the following steps:
[0033] S1. Dissolve a predetermined amount of polyvinylidene fluoride and hydrophilic polyurethane in N,N-dimethylformamide solvent and mix them evenly to prepare a spinning solution; adopt electrostatic spinning method or wet spinning method to The spinning solution is spun and then dried to prepare a composite fiber non-woven fabric;
[0034] S2. Place the composite fiber non-woven fabric described in step S1 in a sealed bag, replace the air in the sealed bag with nitrogen, and use an electron beam to irradiate the composite fiber non-woven fabric at room temperature;
[0035] Then the irradiated composite fiber non-woven fabric is immersed in the antibacterial agent ionic liquid, sealed and placed in a constant temperature water bath, and the grafting reaction is performed at a predetermined temperature;
[0036] S3. Extract wi...
Example Embodiment
[0044] Example 1
[0045] A preparation method of antibacterial non-woven fabric includes the following steps:
[0046] S1. Dissolve polyvinylidene fluoride and hydrophilic polyurethane in N,N-dimethylformamide solvent and mix uniformly to prepare a spinning solution; in the spinning solution, the mass fraction of polyvinylidene fluoride is 15wt%, the mass ratio of hydrophilic polyurethane to polyvinylidene fluoride is 10:90;
[0047] Then the wet spinning method is used to spin the spinning solution, and then washed with ethanol and dried to prepare a composite fiber non-woven fabric; wherein the process parameters of the wet spinning method are set as follows: the inner diameter of the spinning needle is 0.61 mm, the liquid supply rate is 15 mL / h; the predetermined winding speed is 15 mm / s.
[0048] S2. Place the composite fiber non-woven fabric of step S1 in a polyethylene sealed bag, use nitrogen to replace the air in the polyethylene sealed bag, and then use an electron beam to ...
Example Embodiment
[0069] Example 2-3
[0070] The difference from Example 1 is that the mass ratio of waterborne polyurethane to polyvinylidene fluoride is different, as shown in Table 2, and the other steps are the same as those of Example 1, which will not be repeated here.
[0071] Table 2 is the setting of the mass ratio of hydrophilic polyurethane to polyvinylidene fluoride in Examples 1-3 (the antibacterial test sample is Staphylococcus aureus)
[0072]
[0073] Please refer to Table 2. As the amount of polyurethane increases, the mechanical properties of the composite fiber non-woven fabric increase. With the increase of hydrophilic polyurethane, the breaking strength of composite fibers gradually increases, and the elongation at break also increases. The addition of hydrophilic polyurethane also improves the hydrophilic properties of the antibacterial non-woven fabric to a certain extent. The surface of the pure polyvinylidene fluoride material presents extremely strong hydrophobicity. When ...
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