Key Laboratory of Bio-based Material Science & Technology, Northeast Forestry University, Ministry of Education, Harbin 150040, China; Engineering Research Center of Advanced Wooden Materials, Northeast Forestry University, Ministry of Education, Harbin 150040, China.
Key Laboratory of Bio-based Material Science & Technology, Northeast Forestry University, Ministry of Education, Harbin 150040, China; Engineering Research Center of Advanced Wooden Materials, Northeast Forestry University, Ministry of Education, Harbin 150040, China.
Int J Biol Macromol. 2021 Nov 30;191:540-547. doi: 10.1016/j.ijbiomac.2021.09.097. Epub 2021 Sep 24.
Biodegradable poly (lactide) (PLA) and poly (butylene adipate-co-terephthalate) (PBAT) composite films were made by a co-precipitation and hot-pressing method. The property of composite films like the chemical interaction, phase morphology, mechanical properties, and thermal properties were studied. The Fourier transform infrared spectroscopy (FTIR) test manifested that there was a small amount of the transesterifications between the PBAT and PLA during hot pressing, which could improve the compatibility of the two phases. The tensile strength of the film only reduced by 7.4%, while the elongation at break was increased by 119.1% compared with PLA after adding 4%wt PBAT. The composite films showed a high Ultraviolet-visible (UV) light barrier property. The UV blocking rate of the composite after adding 4%wt PBAT was 6.95 times higher than that of pure PLA at 380 nm. The PLA/PBAT composite films with excellent thermal stability, satisfactory mechanical properties and UV-light barrier have high a possibility for an UV screening packaging application.
可生物降解的聚（丙交酯）（PLA）和聚（丁二酸丁二醇酯-对苯二甲酸酯）（PBAT）复合膜通过共沉淀和热压法制备。研究了复合膜的化学相互作用、相形态、力学性能和热性能等性能。傅里叶变换红外光谱（FTIR）测试表明，在热压过程中 PBAT 和 PLA 之间存在少量的酯交换反应，这可以提高两相的相容性。与 PLA 相比，添加 4wt% PBAT 后，薄膜的拉伸强度仅降低了 7.4%，而断裂伸长率却提高了 119.1%。复合膜具有较高的紫外可见光（UV）阻隔性能。添加 4wt% PBAT 后，复合膜在 380nm 处的紫外光阻隔率比纯 PLA 高 6.95 倍。具有优异热稳定性、满意力学性能和 UV 光阻隔性能的 PLA/PBAT 复合膜有望应用于 UV 屏蔽包装。
