阅读说明：本技术 一种无纺布面料加工用纳米抗菌复合纤维及其制备方法 (Nano antibacterial composite fiber for processing non-woven fabric and preparation method thereof ) 是由 孙大伟 于 2021-09-24 设计创作，主要内容包括：本发明公开了一种无纺布面料加工用纳米抗菌复合纤维的制备方法,包括如下步骤：将纳米二氧化钛加入水中,超声分散5-10min,调节体系pH值为2.5-4,加入马来酸酐,氮气保护下60-80℃搅拌2-5h,抽滤,洗涤,40-50℃干燥,粉碎得到接枝纳米粉体；将壳聚糖加入至醋酸溶液中搅拌均匀,氮气保护下,向其中加入丙烯酸、接枝纳米粉体搅拌均匀,加入引发剂,40-60℃反应5-10h,得到共混溶液；将共混溶液经变频步进器以8-10mm/min速率从孔径为0.65-0.75mm的喷丝孔挤出,进入草酸溶液中凝固成型,再依次经过水洗、牵伸、室温干燥至恒重,得到无纺布面料加工用纳米抗菌复合纤维。(The invention discloses a preparation method of nano antibacterial composite fiber for processing non-woven fabrics, which comprises the following steps: adding nano titanium dioxide into water, performing ultrasonic dispersion for 5-10min, adjusting the pH value of the system to 2.5-4, adding maleic anhydride, stirring for 2-5h at 60-80 ℃ under the protection of nitrogen, performing suction filtration, washing, drying at 40-50 ℃, and crushing to obtain grafted nano powder; adding chitosan into an acetic acid solution, stirring uniformly, adding acrylic acid and the grafted nano powder into the acetic acid solution under the protection of nitrogen, stirring uniformly, adding an initiator, and reacting for 5-10 hours at 40-60 ℃ to obtain a blending solution; extruding the blending solution from a spinneret orifice with the aperture of 0.65-0.75mm at the speed of 8-10mm/min by a variable frequency stepper, entering oxalic acid solution for solidification and forming, and then sequentially washing, drafting and drying at room temperature to constant weight to obtain the nano antibacterial composite fiber for processing the non-woven fabric.)

1. A preparation method of nano antibacterial composite fiber for processing non-woven fabrics is characterized by comprising the following steps:

s1, adding nano titanium dioxide into water, performing ultrasonic dispersion for 5-10min, adjusting the pH value of the system to 2.5-4, adding maleic anhydride, stirring for 2-5h at 60-80 ℃ under the protection of nitrogen, performing suction filtration, washing, drying at 40-50 ℃, and crushing to obtain grafted nano powder;

s2, adding chitosan into an acetic acid solution, stirring uniformly, adding acrylic acid and the grafted nano powder into the acetic acid solution, stirring uniformly under the protection of nitrogen, adding an initiator, and reacting for 5-10 hours at 40-60 ℃ to obtain a blending solution;

and S3, extruding the blending solution from a spinneret orifice with the aperture of 0.65-0.75mm at the speed of 8-10mm/min through a variable frequency stepper, entering oxalic acid solution for solidification and forming, and then sequentially washing, drafting and drying at room temperature to constant weight to obtain the nano antibacterial composite fiber for processing the non-woven fabric.

2. The method for preparing the nano antibacterial composite fiber for processing the non-woven fabric according to claim 1, wherein in S1, the mass ratio of the nano titanium dioxide to the maleic anhydride is 2-6: 1-3.

3. The method for preparing nano antibacterial composite fiber for processing nonwoven fabric according to claim 1, wherein in S1, concentrated sulfuric acid is used to adjust the pH value of the system to 2.5-4.

4. The method for preparing the nano antibacterial composite fiber for processing the non-woven fabric according to claim 1, wherein in S1, methanol is adopted for washing 1-4 times after suction filtration.

5. The method for preparing the nano antibacterial composite fiber for processing the non-woven fabric according to claim 1, wherein in S2, the mass ratio of chitosan, acrylic acid, grafted nano powder and an initiator is 5-15: 1-4: 3-6: 0.1-1.

6. The method for preparing nano antibacterial composite fiber for processing nonwoven fabric according to claim 1, wherein in S2, the initiator is hydrogen peroxide or persulfate.

7. The method of claim 1, wherein in S2, the initiator is at least one of ammonium persulfate, potassium persulfate, sodium persulfate, and hydrogen peroxide.

8. The method for preparing nano antibacterial composite fiber for processing nonwoven fabric according to claim 1, wherein in S2, the concentration of acetic acid solution is 0.5-1.2 mol/L.

9. The method for preparing nano antibacterial composite fiber for processing nonwoven fabric according to claim 1, wherein in S3, the mass fraction of oxalic acid solution is 2.5-3.5%.

10. A nano antibacterial composite fiber for processing a non-woven fabric, which is characterized by being prepared by the preparation method of the nano antibacterial composite fiber for processing the non-woven fabric according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of non-woven fabrics, in particular to a nano antibacterial composite fiber for processing a non-woven fabric and a preparation method thereof.

Background

Chitosan is a deacetylated product of chitin, and is the most basic and important derivative of chitin. Chitin, also called chitin and chitin, is chemically (1,4) -2-acetamide-2-deoxy-beta-D-glucan and mainly exists in shells of animals such as shrimps, crabs, pupas and insects and cell walls of fungi and algae. The chitosan has the advantages of no toxicity, biodegradability, good biocompatibility and the like, so that the chitosan has wide research and application prospects in the fields of textiles, biological materials, drug carriers, medical, environmental protection, health care products and the like, and particularly has wide application in non-woven fabrics.

The non-woven fabric which is in close contact with a human body is inevitably contaminated with microorganisms in the using process, the non-woven fabric can be a place for the propagation of the microorganisms, but the antibacterial property of the chitosan non-woven fabric is general, so that the microbial balance on the surface of the skin of the human body is damaged, the microorganisms are propagated on the surface of the skin in large quantity, bacteria on the textile are propagated by taking skin scraps and textile fibers on the surface of the skin as nutrition, various low-grade fatty acids, ammonia and other volatile matters with pungent odor are metabolized, and the secretion of the microorganisms and the secretion of the human body are added, so that the textile generates malodor, and the sanitation is influenced.

Although the nonwoven fabric on the market can enable the fabric to have an antibacterial effect by mixing the antibacterial finishing agent with the nonwoven fabric fibers, the antibacterial effect of the conventional antibacterial nonwoven fabric is gradually poor due to the fact that the antibacterial agent is easily dissolved out of the surface of the fabric, particularly the antibacterial effect of the fabric is rapidly reduced or lost along with the increase of washing times, and meanwhile, the surface of the nonwoven fabric fibers can form a groove structure along with the precipitation of the antibacterial finishing agent, so that the fibers are easy to break in a stress process. At present, the main reason for restricting the development of the chitosan antibacterial fiber is that the mechanical strength of the chitosan fiber is not high, the breaking strength of the chitosan fiber obtained by conventional spinning is only 1.4-2.0cN/dtex, and the breaking strength of the chitosan fiber is seriously reduced by the precipitation of the antibacterial finishing agent.

Therefore, a preparation method of an antibacterial chitosan fiber, which has the advantages of simple process, low production cost, low energy consumption, improved mechanical properties of the fiber and excellent antibacterial effect, is urgently needed.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a nano antibacterial composite fiber for processing a non-woven fabric and a preparation method thereof.

A preparation method of nano antibacterial composite fiber for processing non-woven fabrics comprises the following steps:

s1, adding nano titanium dioxide into water, performing ultrasonic dispersion for 5-10min, adjusting the pH value of the system to 2.5-4, adding maleic anhydride, stirring for 2-5h at 60-80 ℃ under the protection of nitrogen, performing suction filtration, washing, drying at 40-50 ℃, and crushing to obtain grafted nano powder;

s2, adding chitosan into an acetic acid solution, stirring uniformly, adding acrylic acid and the grafted nano powder into the acetic acid solution, stirring uniformly under the protection of nitrogen, adding an initiator, and reacting for 5-10 hours at 40-60 ℃ to obtain a blending solution;

and S3, extruding the blending solution from a spinneret orifice with the aperture of 0.65-0.75mm at the speed of 8-10mm/min through a variable frequency stepper, entering oxalic acid solution for solidification and forming, and then sequentially washing, drafting and drying at room temperature to constant weight to obtain the nano antibacterial composite fiber for processing the non-woven fabric.

Preferably, in S1, the mass ratio of the nano titanium dioxide to the maleic anhydride is 2-6: 1-3.

Preferably, in S1, concentrated sulfuric acid is used to adjust the pH value of the system to 2.5-4.

Preferably, in S1, after suction filtration, washing with methanol is carried out 1 to 4 times.

Preferably, in S2, the mass ratio of chitosan, acrylic acid, grafted nano powder and initiator is 5-15: 1-4: 3-6: 0.1-1.

Preferably, in S2, the initiator is hydrogen peroxide or persulfate.

Preferably, in S2, the initiator is at least one of ammonium persulfate, potassium persulfate, sodium persulfate, and hydrogen peroxide.

Preferably, in S2, the concentration of the acetic acid solution is 0.5-1.2 mol/L.

Preferably, in S3, the mass fraction of the oxalic acid solution is 2.5-3.5%.

A nano antibacterial composite fiber for processing non-woven fabrics is prepared by the preparation method of the nano antibacterial composite fiber for processing non-woven fabrics.

The technical effects of the invention are as follows:

(1) the invention dissolves chitosan in acetic acid solution, then adds acrylic acid, carries out heating polymerization under the protection of nitrogen, the chitosan and acrylic acid free radical polymerization, the obtained macromolecular polymer forms interpenetrating structure, and the size stability and mechanical property of the polymer can be effectively enhanced;

(2) the nano titanium dioxide is dispersed in water, and reacts with maleic anhydride under an acidic condition, the maleic anhydride is grafted on the surface of the nano titanium dioxide, the grafted nano powder is added into a polymer, a double-network structure is taken as a core in the interpenetrating process, the grafted nano powder is fixed in the double-network structure through a surface hydrogen bond, and a cross-linking point is formed in the double-network structure, so that interpenetrating macromolecules are forced to be compatible, the hybridization degree is improved, then double bonds on the grafted nano powder are polymerized in the double-network structure, the energy loss can be realized when the double bonds are stressed, the size stability is enhanced, meanwhile, the nano antibacterial particles are combined in the interpenetrating network structure, the immobilization effect is excellent, the nano antibacterial particles are not easy to slip, and the antibacterial aging is long;

(3) according to the invention, maleic anhydride is grafted on nano titanium dioxide, and then the nano titanium dioxide is fixed in a double-network structure, the formed blending solution is solidified by oxalic acid solution, the nano titanium dioxide can be tightly and firmly filled in fibers, and the separation and dissolution of the nano titanium dioxide from the fiber structure are effectively reduced, so that the antibacterial effect and the antibacterial life of the fiber fabric are effectively enhanced when the fiber fabric is used; meanwhile, the nano titanium dioxide has poor dispersibility and can be more uniformly distributed in the fiber by grafting with the maleic anhydride, so that the antibacterial effect of the antibacterial fiber fabric is further improved.

(4) Even if the fabric is washed for multiple times, the nano antibacterial particles are not easy to separate out, and meanwhile, the nano antibacterial particles are combined in a network structure, so that the mechanical strength of the fiber can be effectively enhanced, the fiber is not easy to break in a stress process, and the using effect and the service life of the antibacterial fiber fabric are effectively enhanced.

Detailed Description

The present invention will be further illustrated with reference to the following specific examples.

Example 1

A preparation method of nano antibacterial composite fiber for processing non-woven fabrics comprises the following steps:

s1, adding 2kg of nano titanium dioxide into 40kg of water, performing ultrasonic dispersion for 5min, adjusting the pH value of the system to 2.5-4 by adopting concentrated sulfuric acid, adding 3kg of maleic anhydride, stirring for 5h at 60 ℃ under the protection of nitrogen, performing suction filtration, washing for 1 time by adopting methanol, drying in a 50 ℃ oven, and crushing to obtain grafted nano powder;

s2, adding 5kg of chitosan into 70kg of acetic acid solution with the concentration of 0.5mol/L, stirring uniformly, adding 4kg of acrylic acid and 3kg of grafted nano powder under the protection of nitrogen, stirring uniformly, adding 1kg of hydrogen peroxide, and reacting for 10 hours at 40 ℃ to obtain a blending solution;

and S3, extruding the blending solution from a spinneret orifice with the aperture of 0.75mm at the speed of 8mm/min through a variable frequency stepper, entering an oxalic acid solution with the mass fraction of 2.5% for solidification and forming, and after solidification for 8min, sequentially washing, drafting and drying at room temperature to constant weight to obtain the nano antibacterial composite fiber for processing the non-woven fabric.

Example 2

A preparation method of nano antibacterial composite fiber for processing non-woven fabrics comprises the following steps:

s1, adding 6kg of nano titanium dioxide into 20kg of water, performing ultrasonic dispersion for 10min, adjusting the pH value of the system to 2.5-4 by adopting concentrated sulfuric acid, adding 1kg of maleic anhydride, stirring for 2h at 80 ℃ under the protection of nitrogen, performing suction filtration, washing for 4 times by adopting methanol, drying in an oven at 40 ℃, and crushing to obtain grafted nano powder;

s2, adding 15kg of chitosan into 50kg of acetic acid solution with the concentration of 1.2mol/L, stirring uniformly, adding 1kg of acrylic acid and 6kg of grafted nano powder into the solution under the protection of nitrogen, stirring uniformly, adding 0.1kg of ammonium persulfate, and reacting for 5 hours at 60 ℃ to obtain a blended solution;

and S3, extruding the blending solution from a spinneret orifice with the aperture of 0.65mm at the speed of 10mm/min through a variable frequency stepper, entering an oxalic acid solution with the mass fraction of 3.5% for solidification and forming, and after solidification for 4min, sequentially washing, drafting and drying at room temperature to constant weight to obtain the nano antibacterial composite fiber for processing the non-woven fabric.

Example 3

A preparation method of nano antibacterial composite fiber for processing non-woven fabrics comprises the following steps:

s1, adding 3kg of nano titanium dioxide into 35kg of water, performing ultrasonic dispersion for 6min, adjusting the pH value of the system to 2.5-4 by adopting concentrated sulfuric acid, adding 2.5kg of maleic anhydride, stirring for 4h at 65 ℃ under the protection of nitrogen, performing suction filtration, washing for 2 times by adopting methanol, drying in an oven at 47 ℃, and crushing to obtain grafted nano powder;

s2, adding 8kg of chitosan into 65kg of acetic acid solution with the concentration of 0.8mol/L, stirring uniformly, adding 3kg of acrylic acid and 4kg of grafted nano powder under the protection of nitrogen, stirring uniformly, adding 0.8kg of potassium persulfate, and reacting for 8 hours at 45 ℃ to obtain a blended solution;

and S3, extruding the blending solution from a spinneret orifice with the aperture of 0.7mm at the speed of 8.5mm/min through a variable frequency stepper, entering oxalic acid solution with the mass fraction of 3.2% for solidification and forming, and after solidification for 5min, sequentially washing, drafting and drying at room temperature to constant weight to obtain the nano antibacterial composite fiber for processing the non-woven fabric.

Example 4

A preparation method of nano antibacterial composite fiber for processing non-woven fabrics comprises the following steps:

s1, adding 5kg of nano titanium dioxide into 25kg of water, performing ultrasonic dispersion for 8min, adjusting the pH value of the system to 2.5-4 by adopting concentrated sulfuric acid, adding 1.5kg of maleic anhydride, stirring for 3h at 75 ℃ under the protection of nitrogen, performing suction filtration, washing for 3 times by adopting methanol, drying in a baking oven at 43 ℃, and crushing to obtain grafted nano powder;

s2, adding 12kg of chitosan into 55kg of acetic acid solution with the concentration of 1mol/L, stirring uniformly, adding 2kg of acrylic acid and 5kg of grafted nano powder under the protection of nitrogen, stirring uniformly, adding 0.2kg of sodium persulfate, and reacting for 6 hours at 55 ℃ to obtain a blended solution;

and S3, extruding the blending solution from a spinneret orifice with the aperture of 0.7mm at the speed of 9.5mm/min through a variable frequency stepper, entering an oxalic acid solution with the mass fraction of 2.8% for solidification and forming, and after solidification for 7min, sequentially washing, drafting and drying at room temperature to constant weight to obtain the nano antibacterial composite fiber for processing the non-woven fabric.

Example 5

A preparation method of nano antibacterial composite fiber for processing non-woven fabrics comprises the following steps:

s1, adding 4kg of nano titanium dioxide into 30kg of water, performing ultrasonic dispersion for 7min, adjusting the pH value of the system to 2.5-4 by adopting concentrated sulfuric acid, adding 2kg of maleic anhydride, stirring for 3.5h at 70 ℃ under the protection of nitrogen, performing suction filtration, washing for 4 times by adopting methanol, drying in a baking oven at 45 ℃, and crushing to obtain grafted nano powder;

s2, adding 10kg of chitosan into 60kg of acetic acid solution with the concentration of 0.9mol/L, stirring uniformly, adding 2.5kg of acrylic acid and 4.5kg of grafting nano powder into the solution under the protection of nitrogen, stirring uniformly, adding 0.5kg of ammonium persulfate, and reacting for 7 hours at 50 ℃ to obtain a blending solution;

and S3, extruding the blending solution from a spinneret orifice with the aperture of 0.7mm at the speed of 9mm/min through a variable frequency stepper, entering oxalic acid solution with the mass fraction of 3% for solidification and forming, and after solidification for 6min, sequentially washing, drafting and drying at room temperature to constant weight to obtain the nano antibacterial composite fiber for processing the non-woven fabric.

Comparative example 1

A preparation method of antibacterial fiber comprises the following steps:

s1, adding 10kg of chitosan into 60kg of acetic acid solution with the concentration of 0.9mol/L, uniformly stirring, and filtering and defoaming to obtain spinning solution;

s2, extruding the spinning solution from a spinneret orifice with the aperture of 0.7mm at the speed of 9mm/min through a variable frequency stepper, entering oxalic acid solution with the mass fraction of 3% for solidification and forming, after solidification for 6min, sequentially washing, drawing and drying at room temperature to constant weight to obtain the antibacterial fiber.

Comparative example 2

A preparation method of antibacterial fiber comprises the following steps:

s1, adding 10kg of chitosan into 60kg of acetic acid solution with the concentration of 0.9mol/L, stirring uniformly, adding 2.5kg of acrylic acid and 4.5kg of nano titanium dioxide into the solution under the protection of nitrogen, stirring uniformly, adding 0.5kg of ammonium persulfate, and reacting for 7 hours at 50 ℃ to obtain a blending solution;

and S2, extruding the blending solution from a spinneret orifice with the aperture of 0.7mm at the speed of 9mm/min through a variable frequency stepper, entering oxalic acid solution with the mass fraction of 3% for solidification and forming, and after solidification for 6min, sequentially washing, drawing and drying at room temperature to constant weight to obtain the antibacterial fiber.

Comparative example 3

A preparation method of antibacterial fiber comprises the following steps:

s1, adding 4kg of nano titanium dioxide into 30kg of water, performing ultrasonic dispersion for 7min, adjusting the pH value of the system to 2.5-4 by adopting concentrated sulfuric acid, adding 2kg of maleic anhydride, stirring for 3.5h at 70 ℃ under the protection of nitrogen, performing suction filtration, washing for 4 times by adopting methanol, drying in a baking oven at 45 ℃, and crushing to obtain grafted nano powder;

s2, adding 10kg of chitosan into 60kg of acetic acid solution with the concentration of 0.9mol/L, stirring uniformly, adding 4.5kg of grafting nano powder into the solution under the protection of nitrogen, stirring uniformly, adding 0.5kg of ammonium persulfate, and reacting for 7 hours at 50 ℃ to obtain a blending solution;

and S3, extruding the blending solution from a spinneret orifice with the aperture of 0.7mm at the speed of 9mm/min through a variable frequency stepper, entering oxalic acid solution with the mass fraction of 3% for solidification and forming, and after solidification for 6min, sequentially washing, drawing and drying at room temperature to constant weight to obtain the antibacterial fiber.

Comparative example 4

A preparation method of antibacterial fiber comprises the following steps:

s1, adding 4kg of nano silver particles into 30kg of water, performing ultrasonic dispersion for 7min, adjusting the pH value of the system to 2.5-4 by adopting concentrated sulfuric acid, adding 2kg of maleic anhydride, stirring for 3.5h at 70 ℃ under the protection of nitrogen, performing suction filtration, washing for 4 times by adopting methanol, drying in a baking oven at 45 ℃, and crushing to obtain grafted nano powder;

s2, adding 10kg of chitosan into 60kg of acetic acid solution with the concentration of 0.9mol/L, stirring uniformly, adding 2.5kg of acrylic acid and 4.5kg of grafting nano powder into the solution under the protection of nitrogen, stirring uniformly, adding 0.5kg of ammonium persulfate, and reacting for 7 hours at 50 ℃ to obtain a blending solution;

and S3, extruding the blending solution from a spinneret orifice with the aperture of 0.7mm at the speed of 9mm/min through a variable frequency stepper, entering oxalic acid solution with the mass fraction of 3% for solidification and forming, and after solidification for 6min, sequentially washing, drawing and drying at room temperature to constant weight to obtain the antibacterial fiber.

Comparative example 5

A preparation method of antibacterial fiber comprises the following steps:

s1, adding 10kg of chitosan into 60kg of acetic acid solution with the concentration of 0.9mol/L, stirring uniformly, adding 2.5kg of acrylic acid into the mixture under the protection of nitrogen, stirring uniformly, adding 0.5kg of ammonium persulfate, and reacting for 7 hours at 50 ℃ to obtain a blending solution;

and S2, extruding the blending solution from a spinneret orifice with the aperture of 0.7mm at the speed of 9mm/min through a variable frequency stepper, entering oxalic acid solution with the mass fraction of 3% for solidification and forming, and after solidification for 6min, sequentially washing, drawing and drying at room temperature to constant weight to obtain the antibacterial fiber.

Test example 1

The nano antibacterial composite fiber for processing the non-woven fabric obtained in the example 5 and the antibacterial fibers obtained in the comparative examples 1 to 5 are characterized in orientation degree and crystallinity, the birefringence method is adopted to detect the orientation degree of each group, and the X-ray diffraction method is adopted to detect the crystallinity degree of each group.

The degree of orientation and the degree of change in crystallinity of each group were calculated by using the antibacterial fiber obtained in comparative example 1 as a control, and the results are shown below:

	rate of change of orientation%	Degree of crystallinity change%
			Example 5	41.25	28.71
Comparative example 2	-4.93	-3.14
			Comparative example 3	28.57	20.50
Comparative example 4	37.62	24.56
			Comparative example 5	30.46	21.37

Test example 2

The nano antibacterial composite fiber for processing the non-woven fabric obtained in the example 5 and the antibacterial fibers obtained in the comparative examples 1 to 5 were subjected to mechanical property tests, specifically as follows:

the fiber to be measured is measured by an LLY-06 type electronic single fiber strength tester: clamping a fiber sample to be tested on a single fiber electronic strength tester, pre-tensioning the fiber sample to be tested to 0.3cN, wherein the clamping length is 10mm, and stretching the fiber sample to be tested until the fiber is broken, wherein the stretching speed is 10 mm/min; the results are shown below:

from the results of test example 1 and test example 2, it is clear that: the invention improves the orientation degree and the crystallinity degree of the fiber by reforming the chitosan fiber, so that the length difference of the connecting chains in the crystal region is small, and when the chitosan fiber is acted by external force, the difference of the tension force borne by each connecting chain is small, so that the external force borne by the fiber is increased, and the mechanical property of the fiber is improved.

Test example 3

According to GB/T20944.3-2008' evaluation of antibacterial performance of textiles part 3: oscillation method test the antibacterial ability of the nano antibacterial composite fiber for processing the nonwoven fabric obtained in example 5 and the antibacterial fibers obtained in comparative examples 1 to 5 was tested.

Gram-negative bacteria escherichia coli are selected as test strains, and the bacteriostasis rate is tested after 0 th washing, 1 th washing, 3 th washing, 5 th washing and 10 th washing respectively. The results are as follows:

	0 th time	1 st time	3 rd time	5 th time	10 th time
						Example 5	99.96	99.95	99.93	99.91	98.88
Comparative example 1	73.25	72.51	72.03	71.26	70.57
						Comparative example 2	79.36	75.51	72.22	70.24	69.03
Comparative example 3	99.87	99.80	99.71	99.57	98.33
						Comparative example 4	99.91	93.24	84.42	76.57	67.33
Comparative example 5	76.32	74.47	73.03	72.51	71.30

From the above table, it can be seen that: after multiple times of washing, the nano antibacterial composite fiber for processing the non-woven fabric is not changed greatly in antibacterial performance, high in stability, free from destroying antibacterial property after washing and good in antibacterial effect.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.