Venkatesan Raja, Alagumalai Krishnapandi, Kim Seong-Cheol
School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea.
Polymers (Basel). 2023 Mar 29;15(7):1710. doi: 10.3390/polym15071710.
The biodegradable polymer poly(butylene adipate-co-terephthalate) (PBAT) starts decomposing at room temperature. Kaolin clay (KO) was dispersed and blended into PBAT composites using a solution-casting method. Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to evaluate the structure and morphology of the composite materials. PBAT/kaolin clay composites were studied by thermogravimetric analysis (TGA). The PBAT composite loaded with 5.0 wt% kaolin clay shows the best characteristics. The biocomposites of PBAT/kaolin [PBC-5.0 (37.6MPa)] have a good tensile strength when compared to virgin PBAT (18.3MPa). The oxygen transmission rate (OTR), with ranges from 1080.2 to 311.7 (cc/m/day), leads the KO content. By including 5.0 wt% kaolin 43.5 (g/m/day), the water vapor transmission rate (WVTR) of the PBAT/kaolin composites was decreased. The pure PBAT must have a WVTR of 152.4 (g/m/day). Gram-positive () and Gram-negative () food-borne bacteria are significantly more resistant to the antimicrobial property of composites. The results show that PBAT/kaolin composites have great potential as food packaging materials due to their ability to decrease the growth of bacteria and improve the shelf life of packaged foods.
可生物降解聚合物聚（己二酸丁二醇酯-对苯二甲酸丁二醇酯）（PBAT）在室温下开始分解。使用溶液浇铸法将高岭土（KO）分散并混入PBAT复合材料中。采用傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）来评估复合材料的结构和形态。通过热重分析（TGA）对PBAT/高岭土复合材料进行了研究。负载5.0 wt%高岭土的PBAT复合材料表现出最佳性能。与纯PBAT（18.3MPa）相比，PBAT/高岭土生物复合材料[PBC-5.0（37.6MPa）]具有良好的拉伸强度。氧气透过率（OTR）在1080.2至311.7（cc/m/天）范围内，随KO含量而变化。通过加入5.0 wt%高岭土，PBAT/高岭土复合材料的水蒸气透过率（WVTR）降低至43.5（g/m/天）。纯PBAT的WVTR必须为152.4（g/m/天）。革兰氏阳性（）和革兰氏阴性（）食源细菌对复合材料的抗菌性能有明显更强的抵抗力。结果表明，PBAT/高岭土复合材料因其能够抑制细菌生长并延长包装食品的保质期，作为食品包装材料具有巨大潜力。
