School of Material Science and Engineering, Xihua University, Chengdu 610039, China.
CCTEG Coal Mining Research Institute, Beijing 101399, China.
Biomolecules. 2024 Nov 11;14(11):1432. doi: 10.3390/biom14111432.
In this manuscript, an efficient self-reinforcing technology-solid hot drawing (SHD) technology-was combined with green processing supercritical carbon dioxide (SC-CO) foaming technology to promote poly (l-lactic acid) (PLLA) to form an oriented micropore structure. In addition, Polydimethylsiloxane (PDMS), with a high affinity of CO and biological safety, was introduced to enhance the nucleation effect in SC-CO 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.
在本手稿中，一种高效的自增强技术——固热拉伸（SHD）技术与绿色加工超临界二氧化碳（SC-CO）发泡技术相结合，使聚（L-乳酸）（PLLA）形成定向微孔结构。此外，具有高 CO 亲和力和生物安全性的聚二甲基硅氧烷（PDMS）被引入到 SC-CO 发泡中，以增强成核效果，并共同调节定向微孔结构的均匀性。结果表明，取向诱导 PLLA 结晶，从而提高了拉伸强度；定向微孔 PLLA 的最大拉伸强度达到 151.2 MPa。此外，微孔主要提高了韧性；最大断裂伸长率达到 148.3%。值得一提的是，PDMS 可以在材料表面形成抗菌膜，使材料具有持续的抗菌效果。
