Antibacterial effect of polylactic acid - nisin film

  • Trần Thanh Thủy
  • Hoa Thị Minh Tú
  • Phạm Thị Thu Phương
  • Nguyễn Quốc Việt
  • Bùi Thị Thanh Mai
  • Trần Đình Mấn
  • Lê Thanh Bình

Abstract

Antibacterial films were prepared from polylactic acid (PLA) and nisin by incorporation method in solvent. The polylactic acid and nisin are products derived from microorganisms (from  R.oryzaeVLSH 01 and L. lactis subsp. Lactis PD14, respectively). The scanning electron microscope image revealed that nisin particles wereuniformly distributed in PLA matrix on the surface. Nisin was incorporated into PLA films at 1415 IU/cm2 . In addition, the antibacterial effect of PLA-nisin film was performed using semi-agar and liquid medium. The results showed that PLA-nisin films were able to inhibit the growth of tested bacteria belong to Gram positive bacteria, especially the food-borne pathogenic bacteria including B. cereus, L. monocytogenes and  S. aureus. At the same time, the PLA-nisin films were able to completely against  B. cereus after 16h cultivation in LB medium with initial concentration 106CFU/ml. This study demonstrates the potential application of antibacterial films in food packaging and food preservation. 

điểm /   đánh giá
Published
2016-01-18
Section
Articles