Biomolecules (Nov 2024)

Preparation and Antibacterial Properties of Poly (<span style="font-variant: small-caps">l</span>-Lactic Acid)-Oriented Microporous Materials

  • Yihong Li,
  • Yanjun Feng,
  • Qingyi Huang,
  • Cenyi Luo,
  • Wei Chen,
  • Zhengqiu Li,
  • Lei Liu,
  • Jiafeng Li

DOI
https://doi.org/10.3390/biom14111432
Journal volume & issue
Vol. 14, no. 11
p. 1432

Abstract

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In this manuscript, an efficient self-reinforcing technology—solid hot drawing (SHD) technology—was combined with green processing supercritical carbon dioxide (SC-CO2) foaming technology to promote poly (l-lactic acid) (PLLA) to form an oriented micropore structure. In addition, Polydimethylsiloxane (PDMS), with a high affinity of CO2 and biological safety, was introduced to enhance the nucleation effect in SC-CO2 foaming and co-regulate the uniformity of oriented micropores’ structure. The results showed that orientation induced PLLA crystallization, so the tensile strength was improved; the maximum tensile strength of the oriented micropores’ PLLA reached 151.2 MPa. Furthermore, the micropores mainly improved the toughness; the maximum elongation at break reached 148.3%. It is worth mentioning that PDMS can form an antibacterial film on the surface of the material, so that the material has a continuous antibacterial effect.

Keywords