Journal of Polymers and the Environment ( IF 4.7 ) Pub Date : 2022-03-16 , DOI: 10.1007/s10924-022-02422-4 Ce Sun 1, 2 , Changxin Li 1, 2 , Haiying Li 1, 2 , Mengyao Liu 1, 2 , Hao Zheng 1, 2 , Haiyan Tan 1, 2 , Yonggui Wang 1, 2 , Yanhua Zhang 1, 2
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Polylactic acid (PLA), Poly (butylene adipate-terephthalate) (PBAT) and Quaternary ammonium salt modified cellulose nanocrystals (SCNC) were used to prepare a multifunctional composite film using co-precipitation method. The addition of SCNC not only played the role of plasticizing, but also inhibited the individual aggregation of PBAT, which improve the compatibility between PLA and PBAT. The mechanical properties of the film were improved than that of PLA/PBAT films and the elongation at the break after adding 0.5%wtSCNC increases by 116.2% compared with PLA film. The addition of PBAT and SCNC significantly increases the functionality of PLA films. The water vapor transmission rate of the films decreased up by 74% compared with PLA and the migration rate of food simulant liquid decreased by about 80% after adding SCNC. In addition, the ultraviolet resistance of PLA/PBAT/SCNC composite film was significantly improved. PLA/PBAT/0.5wt%SCNC film showed the best light transmittance in the visible light range in different PLA/PBAT/SCNC films, and the UV transmittance at 380 nm was only 12.3% which was 14.3% of PLA. The multifunctional composite film produced by this work provided a new choice for the preparation of fully degradable packaging materials.
Graphical Abstract
中文翻译：
改性纤维素纳米晶增强PLA与PBAT相容性制备多功能复合薄膜
以聚乳酸（PLA）、聚（己二酸-对苯二甲酸丁二醇酯）（PBAT）和季铵盐改性纤维素纳米晶（SCNC）为原料，采用共沉淀法制备多功能复合薄膜。SCNC的加入不仅起到增塑作用，而且抑制了PBAT的个体聚集，提高了PLA与PBAT的相容性。薄膜的力学性能较PLA/PBAT薄膜有所提高，添加0.5%wtSCNC后的断裂伸长率较PLA薄膜提高116.2%。PBAT 和 SCNC 的加入显着增加了 PLA 薄膜的功能。加入SCNC后，薄膜的水蒸气透过率较PLA降低74%，食品模拟液迁移率降低约80%。此外，PLA/PBAT/SCNC复合薄膜的抗紫外线性能显着提高。PLA/PBAT/0.5wt%SCNC薄膜在不同PLA/PBAT/SCNC薄膜的可见光范围内表现出最好的透光率，380 nm处的紫外透光率仅为12.3%，为PLA的14.3%。本工作生产的多功能复合薄膜为全降解包装材料的制备提供了新的选择。
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