Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (04): 1-6.doi: 10.13475/j.fzxb.20180505906

• Fiber Materials •     Next Articles

Preparation and antibacterial properties of TiO2-Ag/poly(lactic acid) nano-composite fibers

SUN Hui(), ZHANG Hengyuan, XIAN Yulong, ZHOU Chuankai, YU Bin   

  1. Silk Institute, College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
  • Received:2018-05-24 Revised:2018-12-29 Online:2019-04-15 Published:2019-04-16

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Abstract:

In order to endow the efficient antibacterial properties for poly(lactic acid) (PLA) fiber, the various mass ratios of TiO2-Ag/PLA nano-composite fibers were prepared by melt spinning. Moreover, TiO2/PLA nano-composite fiber with the certain mass ratio was also prepared under the same conditions. The structure, thermal properties and antibacterial properties of the two kinds of the nano-composite fibers were investigated and contrasted. The results show that two kinds of nano-particles can uniformly dispersed in PLA matrix when the contents of the nanoparticles are no more than 3%. The addition of two nano-particles have almost no influence on the glass transition temperature and crystalline structure of PLA, whereas their cooperation in PLA matrix decreases the melting temperature and thermal stability of PLA. Furthermore, when TiO2 nano-particles with the mass content of 3% are added, the crystalline temperature of PLA slightly reduces. The antibacterial ratio against Staphylococcus aureus and Escherichia coil of TiO2-Ag/PLA nano-composite fibers enhances with the increasing in the content of TiO2-Ag. When two kinds of nano-particles with the same mass ratio are added, TiO2-Ag/PLA nano-composite fiber has the higher antibacterial ratio against the two bacteria compared with TiO2/PLA nano-composite fiber.

Key words: poly(lactic acid), TiO2-Ag nano-mesoporous microsphere particle, nano-composite fiber, antibacterial property

CLC Number: 

  • TB332

Tab.1

Various mass ratios of samples%"

样品编号 PLA TiO2-Ag TiO2
0# 100
1# 99 1
2# 97 3
3# 95 5
4# 97 3

Fig.1

FT-IR spectra of pure PLA and nano-composite fibers"

Fig.2

SEM fracture images of pure PLA and nano-composite fibers"

Fig.3

DSC curves of pure PLA and nano-composite fibers"

Tab.2

Thermal parameters of pure PLA and nano-composite fibers℃"

样品编号 Tg Tc Tm1 Tm2 Xc T5% T95%
0# 62.4 117.4 154.4 166.4 32.6 337.7 386.3
1# 62.3 117.3 153.3 165.3 32.9 337.0 384.3
2# 62.8 117.2 154.3 164.8 33.7 315.1 371.1
3# 63.3 117.1 154.8 164.1 33.1 302.8 373.2
4# 62.2 114.5 152.1 163.1 32.4 300.4 365.4

Fig.4

TG curves of pure PLA and nano-composite fibers"

Fig.5

XRD spectra of pure PLA and nano-composite fibers"

Tab.3

Antibacterial ratio to Staphylococcus aureus and Escherichia coil of pure PLA and nano-composites fibers%"

样品编号 金黄色葡萄球菌 大肠杆菌
0# 0.0 0.0
1# 70.0 77.7
2# 97.4 98.8
3# 99.5 99.8
4# 79.0 75.3
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