To improve the weak interaction between poly (butylene adipate‐co‐terephthalate) (PBAT) and poly (lactic acid) (PLA) blends, this study added modified metal-organic frameworks (MOFs) to enhance the interfacial bonding strength between PBAT and PLA. MOF-5 nanoparticles were synthesized by room temperature synthesis and modified with KH-560. PBAT/PLA/KH-560@MOF films were prepared by solvent casting. The microscopic morphology, mechanical properties, thermal properties, hydrophobicity, water vapor transmission rate and antimicrobial properties of the composite films were investigated. The results showed that KH-560@MOF nanoparticles were uniformly dispersed in the polymer matrix of PBAT and PLA, reducing phase interface defects. Mechanical properties of PLA/PBAT improved in the presence of KH-560@MOF. The breaking elongation and tensile strength values were maximized when adding 1 wt% KH-560@MOF. Doping of KH-560@MOF improves hydrophobicity and water vapor transmission rate of films. Zn2+ in MOF-5 imparts antimicrobial properties to the film, showing antimicrobial activity against both Gram-positive and Gram-negative food-borne pathogens (i.e., E. coli and S.aureus). This work enriched the design of compatibilizer for the PLA/PBAT blend and provided a novel approach for expanding the application of MOFs.

中文翻译：

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硅烷改性 MOF-5 作为 PBAT/PLA 共混物的增容剂：增强机械性能、抗菌性能和水阻隔性能


为了改善聚己二酸丁二醇酯-对苯二甲酸酯 （PBAT） 和聚乳酸 （PLA） 共混物之间的弱相互作用，本研究添加了改性金属有机框架 （MOF） 以提高 PBAT 和 PLA 之间的界面粘合强度。通过室温合成合成 MOF-5 纳米颗粒，并用 KH-560 修饰。采用溶剂流延制备 PBAT/PLA/KH-560@MOF 薄膜。研究了复合膜的微观形貌、力学性能、热性能、疏水性、水蒸气透过率和抗菌性能。结果表明，KH-560@MOF 纳米颗粒均匀分散在 PBAT 和 PLA 的聚合物基体中，减少了相界面缺陷。在 KH-560@MOF 存在下，PLA/PBAT 的机械性能得到改善。当添加 1 wt% KH-560@MOF 时，断裂伸长率和拉伸强度值最大。KH-560@MOF 的掺杂提高了薄膜的疏水性和水蒸气透过率。MOF-5 中的 Zn2+ 赋予薄膜抗菌特性，对革兰氏阳性和革兰氏阴性食源性病原体（即大肠杆菌和金黄色葡萄球菌）均显示出抗菌活性。这项工作丰富了 PLA/PBAT 共混物相容剂的设计，为扩大 MOF 的应用提供了一种新的途径。