Delorme Astrid E, Radusin Tanja, Myllytie Petri, Verney Vincent, Askanian Haroutioun
CNRS, Clermont Auvergne INP, ICCF, Université Clermont Auvergne, 63000 Clermont-Ferrand, France.
Norner Research, Dokkvegen 20 NO-3920, 3920 Porsgrunn, Norway.
Nanomaterials (Basel). 2022 Mar 16;12(6):978. doi: 10.3390/nano12060978.
Poly(butylene succinate-co-butylene adipate) (PBSA)-based materials are receiving growing attention in the packaging industry for their promising biodegradability. However, poor gas barrier properties and low durability of biodegradable polymers, such as PBSA, have limited their wide-spread use in food packaging applications. Here we report a scalable solution to improve gas barrier properties and stabilize PBSA against photo-aging, with minimal modifications to the biodegradable polymer backbone by using a commercially available and biocompatible layered double hydroxide (LDH) filler. We investigate and compare the mechanical, gas barrier, and photoaging properties of PBSA and PBSA-LDH nanocomposite films produced on a pilot scale. An increase in rigidity in the nanocomposite was observed upon addition of LDH fillers to neat PBSA, which direct the application of neat PBSA and PBSA-LDH nanocomposite to different food packaging applications. The addition of LDH fillers into neat PBSA improves the oxygen and water vapour barriers for the PBSA based nanocomposites, which increases the attractiveness of PBSA material in food packaging applications. Through changes in the viscoelastic behaviour, we observe an improved photo-durability of photoaged PBSA-LDH nanocomposites compared to neat PBSA. It is clear from our studies that the presence of LDH enhances the lifetime durability and modulates the photodegradation rate of the elaborated biocomposites.
聚（丁二酸丁二醇酯-共-己二酸丁二醇酯）（PBSA）基材料因其具有良好的生物降解性而在包装行业中受到越来越多的关注。然而，诸如PBSA之类的可生物降解聚合物的气体阻隔性能较差且耐久性较低，这限制了它们在食品包装应用中的广泛使用。在此，我们报道了一种可扩展的解决方案，通过使用市售且具有生物相容性的层状双氢氧化物（LDH）填料，在对可生物降解聚合物主链进行最少改性的情况下，改善气体阻隔性能并稳定PBSA以抵抗光老化。我们研究并比较了中试规模生产的PBSA和PBSA-LDH纳米复合薄膜的机械性能、气体阻隔性能和光老化性能。在向纯PBSA中添加LDH填料后，观察到纳米复合材料的刚性增加，这指导了纯PBSA和PBSA-LDH纳米复合材料在不同食品包装应用中的应用。向纯PBSA中添加LDH填料可改善基于PBSA的纳米复合材料的氧气和水蒸气阻隔性能，这增加了PBSA材料在食品包装应用中的吸引力。通过粘弹性行为的变化，我们观察到与纯PBSA相比，光老化的PBSA-LDH纳米复合材料的光耐久性有所提高。从我们的研究中可以清楚地看出，LDH的存在提高了所制备生物复合材料的使用寿命耐久性，并调节了其光降解速率。
