Wu Yincai, Lin Xintu, Li Jinlei, Zhang Chuanxiang, Liu Yuejun, Song Lijun, Hao Xihai, Lin Fenglong, Wang Shenglong, Dong Tungalag
Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province, School of Packaging and Materials Engineering, Hunan University of Technology, Zhuzhou 412007, China.
Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen 361021, China.
Materials (Basel). 2021 Aug 27;14(17):4882. doi: 10.3390/ma14174882.
PLA is widely used in the field of disposable products for its good transparency, high strength, high modulus, and good processing performance. However, the crystallization rate and crystallinity of PLA are weak. In actual production, the PLA products that are typically obtained are amorphous with poor heat resistance, which greatly limits the application range of PLA products. Finding an effective nucleating agent to improve the transparency of PLA has been a hot topic in research. This study found that Cerium fluoride (CeF) can effectively improve the crystallinity of PLA/CeF (P/F) films. When the content of CeF in PLA was 1 wt %, the retention ratio of visible light transmittance was 82.36%, the crystallinity was 29.8%, and the tensile strength was 59.92 MPa. Compared to pure PLA, the crystallinity of P/F1 increased by 56% and tensile strength increased by 8.76%. This study provided an alternative scheme that maintained the PLA film's transparency and improved the crystallinity of PLA, which significantly expanded the application of PLA.
聚乳酸（PLA）因其良好的透明度、高强度、高模量和良好的加工性能而广泛应用于一次性产品领域。然而，PLA的结晶速率和结晶度较低。在实际生产中，通常得到的PLA产品是无定形的，耐热性较差，这极大地限制了PLA产品的应用范围。寻找一种有效的成核剂来提高PLA的透明度一直是研究的热点。本研究发现，氟化铈（CeF）能有效提高PLA/CeF（P/F）薄膜的结晶度。当PLA中CeF的含量为1 wt%时，可见光透过率保留率为82.36%，结晶度为29.8%，拉伸强度为59.92 MPa。与纯PLA相比，P/F1的结晶度提高了56%，拉伸强度提高了8.76%。本研究提供了一种既能保持PLA薄膜透明度又能提高PLA结晶度的替代方案，显著扩大了PLA的应用范围。
