1-hexadecyl-3-methylimidazolium chloride ionic liquid (IL) and sodium montmorillonite nanoclay (MMT) were used collaboratively to improve the properties of poly(butylene adipate-butylene terephthalate) (PBAT). Based on the ion exchange interaction and the shear effect during the melt blending process, effective exfoliation and uniform dispersion of MMT in the PBAT matrix have been achieved. The exfoliated nano MMT acted as heterogeneous nucleating agent and promoted the crystallization of PBAT, causing the melting and crystallization temperatures to shift towards higher temperatures. When the IL content was 3 wt%, the maximum complex viscosity and modulus was reached, and further increase of IL led to a decrease of the viscoelasticity due to the plasticizing effect of IL. For the same reason, the synergistic effect of MMT and IL achieved the optimum mechanical properties of PBAT/MMT/IL3 film. Furthermore, the excellent barrier performance of two-dimensional MMT nanosheets decreased the permeability of oxygen and water vapor of the nanocomposite films. Simultaneously, the synergistic effect of MMT and IL enhanced the anti-static and antibacterial abilities of PBAT. Therefore, this work has a positive effect on promoting the application of PBAT in the packaging field.

协同使用1-十六烷基-3-甲基咪唑氯化物离子液体（IL）和钠蒙脱石纳米粘土（MMT）来改善聚（己二酸-对苯二甲酸丁二醇酯）（PBAT）的性能。基于熔融共混过程中的离子交换相互作用和剪切效应，实现了MMT在PBAT基质中的有效剥离和均匀分散。剥离的纳米MMT作为异相成核剂，促进PBAT结晶，导致熔融和结晶温度向更高温度移动。当IL含量为3wt%时，复数粘度和模量达到最大，并且由于IL的增塑作用，进一步增加IL会导致粘弹性下降。出于同样的原因，MMT和IL的协同作用实现了PBAT/MMT/IL3薄膜的最佳机械性能。此外，二维MMT纳米片优异的阻隔性能降低了纳米复合薄膜的氧气和水蒸气的渗透性。同时，MMT和IL的协同作用增强了PBAT的抗静电和抗菌能力。因此，本工作对于推动PBAT在封装领域的应用具有积极的作用。