Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (02): 89-94.doi: 10.13475/j.fzxb.20190307006

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Synthesis of polybetaine antibacterial agent and its applications in cotton textiles finishing

GAO Simeng1,2,3, WANG Hongbo1,2,3(), DU Jinmei1,2,3, WANG Wencong1,2,3   

  1. 1. Jiangsu Engineering Technology Research Center of Functional Textiles, Jiangnan University, Wuxi, Jiangsu 214122, China
    2. Key Laboratory of Eco-Textiles(Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China
    3. College of Textiles and Clothing, Jiangnan University, Wuxi, Jiangsu 214122, China
  • Received:2019-03-24 Revised:2019-06-20 Online:2020-02-15 Published:2020-02-21
  • Contact: WANG Hongbo E-mail:wxwanghb@163.com

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Abstract:

In order to enhance the antibacterial efficiency of the existing betaine antibacterial agent in cotton fabric finishing, a polysulfonatedbetaine antibacterial finishing agent (PSPB-Am-AGE) was prepared and applied on a cotton fabric for antibacterial property. The effects of temperature, time, amount of initiator, ratio of betaine and acrylamide monomer of synthesizing on the inhibition rate of PSPB-Am-AGE were investigated based on the use of the orthogonal experimental planning method. Counting viable bacteria method was used to test the minimum inhibitory concentration of PSPB-Am-AGE, antimicrobial properties and washing fastness of cotton fabrics after antimicrobial finishing. The optimum conditions for the synthesis are as follows: temperature is 70 ℃, the molar ratio of betaine to acrylamide is 2∶1, the amount of initiator is 2%, and the reaction time is 4 h. The result shows that the minimum inhibitory concentration (MIC) of PSPB-Am-AGE for Escherichia coli (E. coli) and Staphylococcus aureus (S.aureus) is 2.625 g/L. FT-IR and SEM confirmed that PSPB-Am-AGE is synthesized and successfully grafted onto the surface of the cotton fabric. It turned out that the antibacterial rates of the finished fabrics against E.coli and S.aureus are 96.25% and 99.79%. The bacterial reduction rates maintains to be over 90% against both bacteria even after 30 consecutive laundering cycles. The washing fastness test shows that treated cotton is better than that of AAA class antibacterial textiles.

Key words: betaine, polymerization, cotton fabric, antibacterial finishing, antibacterial finishing agent

CLC Number: 

  • TS195.5

Tab.1

Designs of PSPB-Am-AGE synthetic orthogonal experiment"

水平 T/℃ t/h C D/%
1 60 4 1∶1 1
2 70 5 1∶2 1.5
3 80 6 2∶1 2

Tab.2

Results of orthogonal experiment"

试验号 T t C D 对S. aureus的
抑菌率/%		 对E.coli的
抑菌率/%
1 1 1 1 1 98.968 96.577
2 1 2 2 2 99.492 98.421
3 1 3 3 3 99.997 99.993
4 2 1 2 3 99.999 98.095
5 2 2 3 1 99.999 98.641
6 2 3 1 2 99.999 99.997
7 3 1 3 2 99.999 99.999
8 3 2 1 3 99.999 91.416
9 3 3 2 1 81.739 81.239
k1 S.aureus 298.457 298.968 298.967 280.707
E.coli 294.991 294.672 287.990 276.457
k2 S.aureus 299.999 299.491 281.231 299.492
E.coli 296.733 288.478 277.755 298.418
k3 S.aureus 281.738 281.736 299.996 299.995
E.coli 272.655 281.229 298.634 289.504
R S.aureus 18.262 17.755 18.765 19.288
E.coli 24.078 13.443 20.879 21.961

Fig.1

Survivals of S.aureus corresponding to different concentrations of PSPB-Am-AGE"

Fig.2

Survivals of E.coli corresponding to different concentrations of PSPB-Am-AGE"

Fig.3

Infrared spectra of PSPB-Am-AGE"

Fig.4

Infrared spectra of cotton fabric treated and untreated with PSPB-Am-AGE"

Fig.5

SEM images of cotton fabric. (a) Untreated one(×2 500); (b) Treated with PSPB-Am-AGE(×1 800)"

Fig.6

Photographs of antibacterial activities against E.coli/S.aureus of cotton fabrics finished with PSPB-Am-AGE before and after 30 times of washing. (a) Raw cotton fabric (E.coli); (b) Finished cotton fabric before washing (E.coli); (c) Finished cotton fabric after 30 times of washing (E.coli); (d) Raw cotton fabric (S.aureus); (e) Finished cotton fabric before washing (S.aureus); (f) Finished cotton fabric after 30 times of washing (S.aureus)"

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