Study on Antibacterial Activity of Silver Antibacterial Polyester Fiber and Its Textiles

Study on Antibacterial Activity of Silver Antibacterial Polyester Fiber and Its Textiles

Study on Antibacterial Activity of Silver Antibacterial Polyester Fiber and Its Textiles

[Abstract] The normal flora is a conditional pathogen. When the body's resistance is reduced, the harmless normal flora may turn into a harmful pathogen. Silver-loaded antibacterial polyester fiber and its textiles have good antibacterial properties against Escherichia coli, Staphylococcus aureus, Candida albicans and MRSA. The antibacterial textile produced by the antibacterial fiber is an effective external barrier against the invasion of the human body by the pathogenic microorganism.
[Key words] antibacterial fabric; silver-loaded antibacterial polyester fiber; antimicrobial
1 Introduction
With the development of business activities and the tourism and entertainment industries, people are increasingly traveling, interacting and recreational activities. These public places and a wide range of personnel movements are not only the main source of transmission of various infectious diseases, but also the main places and media for various safety hazards that are most likely to cause accidents. Therefore, wearing antibacterial textiles can make people's travel and activities safer. The antibacterial properties of textiles are not only an important external barrier for humans to resist the invasion of pathogenic microorganisms, but also one of the products of human scientific and technological progress.
2 normal flora and pathogenic flora associated with humans
When people are born into this world, they have an indissoluble bond with bacteria. Bacteria not only live in the environment around us, but also live and breed in our bodies. Under normal circumstances, in addition to the internal organs as well as the blood vessels and lymphatic system, the human body has bacteria in the external "open system" of other parts (such as skin, respiratory tract, gastrointestinal tract and genitourinary tract). There is no essential difference between the normal flora and the pathogenic flora. The former is only labeled as "normal", but actually erodes the human body in a hidden and chronic way. Covering the skin of the human body, it receives tens of thousands of temporary bacteria every day. Among them, the harmless Acne bacillus and Staphylococcus aureus temporarily reside on the skin that is secreted by the sebaceous glands, leaving acne on the face and chest and back of adolescents. Other flora, hosted in warm and humid armpits, areola, genitals, etc., break down the thick and odorless secretions secreted from the apocrine glands, resulting in an unpleasant smell.
Staphylococcus aureus is one of the most common pathogens causing serious infections in hospitals and can cause pneumonia and meningitis. The bacteria usually also exist on the surface of the skin and in the nasal passages of healthy people. About 60% of the people have carried the bacteria in the nasal cavity for a certain period of time in their lifetime, but generally do not cause any symptoms. Microorganisms and parasites that cause disease are collectively referred to as “sources of infection” [1–2], and more than 400 microorganisms can infect humans. They are widely found in human mouth, nose, throat, digestive tract, genitourinary tract and skin. . Everyone may be affected by more than 150 types of pathogens in the second phase of 2006. In normal human immune function, it will not cause diseases, and some may even be beneficial to the human body, such as intestinal flora (E. coli Etc.) A variety of vitamins can be synthesized. The presence of these flora also inhibits the growth of certain pathogenic bacteria, so these microorganisms are called "normal microbiota" (normal flora); but when the body's immunity is reduced, between humans and microbes When the equilibrium relationship is destroyed, the normal flora can also cause diseases, so they are also called "conditional pathogenic microorganisms" (conditional pathogens).
When the body is attacked by pathogens, it is related to its own immunity, on the other hand, it depends on the pathogenicity of the pathogen and the amount of invasion. In general, the greater the number, the greater the likelihood of morbidity. In particular, pathogens with weak pathogenicity require a large amount to cause disease. A small number of microorganisms are quite pathogenic, and only mild infections can cause diseases such as plague, smallpox, and rabies. The skin is covered on the outer surface of the body and consists of the epidermis and the dermis. The epidermal cells are closely arranged, making it difficult for foreign germs to enter the body. There is also "skin-associated lymphoid tissue" in the epidermis, which is mainly involved in cellular immunity [3]. The dermis relies on a "dermis-skin connection" with a semi-permeable barrier or filtration. This special chemical structure prevents the invasion of exogenous harmful substances while regulating the material transport between the epidermis and the dermis. Because the human digestive tract, respiratory tract, and genitourinary tract communicate with the outside world, it becomes the main part of the invasion of external bacteria and harmful substances.
Exogenous germs or foreign bodies must invade the human body and must cross a variety of barriers. The human body maintains its own stability and functional coordination through a series of complete barrier structures and a developed immune system. Of course, this defensive function is also limited; once the limit is exceeded, the human body will be affected by the bacteria.
At present, the view that "normal flora is a conditional pathogen" has been widely accepted. Microbiologists believe that the normal flora and the human body are always in equilibrium, and the flora is also mutually restrained to maintain a relative balance. When the body's resistance is reduced or long-term use of broad-spectrum antibiotics, corticosteroids, excessive use of isotopes or long-term consumptive diseases, these balances will be destroyed, and the harmless normal flora may be turned into harmful pathogens. group. Therefore, textiles with antibacterial function are another external barrier for humans to resist the invasion of human body by foreign microorganisms. In this paper, the hazards and invasive pathways of pathogenic microorganisms to human health are reviewed. Through the study on the antibacterial properties of antibacterial fibers and their textiles, we try to show that antibacterial textiles have obvious antibacterial properties to common pathogenic microorganisms.
3 Experimental part
311 raw materials
112D×38 mm antibacterial polyester staple fiber, 115D × 38 mm antibacterial polyester staple fiber, 100DP48F antibacterial polyester DTY and 150DP48F antibacterial polyester DTY, produced by China Textile Institute; 24 50P50 polyester/cotton yarns (115D × 38 mm antibacterial polyester staple fiber) 32 sets of 30P70 polyester/cotton yarns (115D × 38mm antibacterial polyester staple fiber), produced by Beijing Cotton Spinning Plant II; 60 35P65 polyester/cotton yarns (112D × 38mm antibacterial polyester staple fiber), Taiyuan Xinkai, Shanxi Textile Printing and Dyeing Co., Ltd. produces.
312 antibacterial performance test
3. 2. 1 Special equipment
(1) Test bacteria Staphylococcus aureus (ATCC6538), Escherichia coli (8099), Candida albicans (ATCC 10231).
(2) Phosphate buffer (PBS, 0103 moLPL, pH 712 ~ 714) disodium hydrogen phosphate (Na2HPO4, anhydrous) 2183 gPL, potassium dihydrogen phosphate (KH2 PO4) 1136 gPL, nonionic surfactant (Tween 80 ) 1 gPL, distilled water.
(3) Nutritional agar medium peptone 10 g, beef extract 5 g, sodium chloride 5 g, agar 20 g, distilled water 1000 mL.
(4) Shabao's agar medium "Textile Science Research" 17 protein 胨 10 g, glucose 40 g, agar 20 g, distilled water 1000 mL.
(5) Preparation of bacterial suspension [4] Take the nutrient agar medium slant fresh material of the 3rd to 14th generation strains for 18-24 hours, wash the lawn with 5 mL of phosphate buffer solution (PBS), and suspend the bacteria evenly. , diluted to the desired concentration with PBS.
3. 2. 2 Test method for antibacterial performance The test method for antibacterial performance is carried out according to GB15979 Appendix C (C5), and the test time is 6-24 h.
4 Results and discussion
Antibacterial activity of 411 antibacterial polyester staple fibers of different specifications
We have produced different specifications of antibacterial polyester staple fibers on industrial production equipment, and studied the antibacterial properties of Escherichia coli, Staphylococcus aureus, antibiotics penicillin-resistant Staphylococcus aureus and Candida albicans. The test results are shown in the table. 1.
Table 1 Antibacterial rate of antibacterial polyester staple fiber (%)
Polyester staple fiber Escherichia coli
Golden
staphylococcus
Golden yellow grape
Cocci MRSA
3 Candida albicans
Ordinary polyester staple fiber 15169 17125 13160
Antibacterial 115 D × 38 mm 99199 99187 99120 99198
Antibacterial 115 D × 3 8mm
Standard washing 50 times
3 3 100100 99190 99199
Antibacterial 112 D × 38 mm 99120 99188 99191
Antibacterial 112 D × 38 mm
Standard washing 50 times
99199 99180 99196 3MRSA is a test conducted at the Guangdong Institute of Microbiology and in accordance with the AATCC100 test method.
3 3 The washing method is carried out in accordance with the GBPT862922001 standard. As can be seen from Table 1, the antibacterial polyester staple fiber has very good antibacterial properties against Escherichia coli, Staphylococcus aureus and Candida albicans. After 50 standard washings, the antibacterial properties of the fiber are unchanged, while the ordinary polyester staple fiber is basically not Bacteriostatic. Antibacterial polyester staple fibers have excellent antibacterial properties against MRSA. The so-called MRSA bacteria refers to the anti-biotin penicillin-resistant Staphylococcus aureus. In-hospital infections caused by MRSA were first discovered in Europe and the United States. Since 1980, China has found MRSA patients in various hospitals, and silver-loaded antibacterial polyester staple fibers and their textiles can provide an effective solution to inhibit MRSA.
412 Effect of dyeing and finishing on antibacterial properties of antibacterial knitted fabrics
Using 32 knitting yarns with a ratio of polyester to cotton of 30P70, batch antibacterial knitted fabrics were processed in Tongniu Group Keying Knitting Technology Development Co., Ltd., and their antibacterial performance tests were carried out. See Table 2 for the results. It can be seen from Table 2 that the antibacterial rate of polyester-cotton knitted antibacterial products processed with 115 D × 38 mm antibacterial polyester staple fiber is still above 70%; after dyeing and finishing, the antibacterial rate of __________ products is also No effect; after 50 standard washings of knitwear, the bacteriostatic rate can still be increased to over 80%. 18 Issue 2, 2006
Table 2 Antibacterial rate of antibacterial knitted fabrics against Escherichia coli before and after conventional dyeing and finishing (%)
Standard washing before standard washing 50 times after the grey cloth 71. 20 87. 60 bleaching cloth 75. 30 88. 30 high temperature and high pressure dyeing 74. 20 89. 30 cotton dyeing process 72. 20 90. 80
413 Study on Antibacterial Properties of Antibacterial Woven Fabrics by Dyeing and Finishing
Using 24 sets of 50P50 polyester yarns, we processed woven fabrics of J24 × J24 in Beijing Cotton Spinning No. 2 Factory, and dyed and finished them in Beijing Guanghua Dyeing and Weaving Factory, and carried out the bacteriostatic performance of woven fabrics before and after dyeing and finishing. The test. See Table 3 for the results.
Table 3 Antibacterial rate of antibacterial woven fabric against Escherichia coli before and after dyeing and finishing (%)
Standard washing before standard washing 50 times after the grey cloth 82. 00 82. 80 alkali treatment after desizing and dyeing 83. 50 89. 60 enzyme treatment after desizing and dyeing 81. 40 91. 98 As can be seen from Table 3, the ratio of polyester to cotton is 50P50 The antibacterial woven fabric has an antibacterial property of more than 80%; after 50 standard washings, the antibacterial property of the product is basically unchanged, and the dyeing and finishing process has little effect on the antibacterial property.
414 Antibacterial properties of high-count yarn antibacterial products
The antibacterial properties of the deep-processed antibacterial products, antibacterial shirts and antibacterial socks, which were carried out with 60 35P65 polyester yarns, are shown in Table 4.
Table 4 Antibacterial rate of antibacterial products against Escherichia coli (%)
Standard washing before standard washing 50 times after antibacterial socks 88. 70 85. 60 antibacterial shirt 84. 30 85. 70 As can be seen from Table 4, with 112 d × 38 mm antibacterial short fiber and cotton fiber, according to the ratio of 35P65 can be spun 60 The above high-count yarns, the antibacterial properties of the processed antibacterial shirts and antibacterial socks are all above 80%, and the dyeing and finishing process has little effect on the antibacterial rate of the finished products.
Antibacterial properties of 415 antibacterial polyester DTY
The antibacterial properties of different specifications of antibacterial polyester DTY are shown in Table 5.
Table 5 Antibacterial rate of antibacterial polyester DTY against Escherichia coli (%)
Antibacterial polyester DTY E. coli 150DP48F 97. 5775DP48F 99. 28 (continued on page 47) "Textile Science Research" 19
5 Conclusion
It can be seen from the above test results that the antibacterial fiber and the textile thereof can effectively inhibit the pathogenic microorganisms, and the antibacterial fiber can be processed by the conventional processing technology, and the conventional dyeing and finishing process has no effect on the antibacterial property. Antibacterial polyester fiber and antibacterial textiles can be widely used in household, hospital, hotel bedding and fillings, as well as underwear, sweatshirts, old age, maternal and infant clothing, shoe lining, socks, etc., to protect against pathogenic microorganisms One of the safe, effective external barriers that invade the human body.
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