Silver-loaded kaolinite (AgKaol), an antibacterial agent along with a barrier enhancer, was incorporated into poly(lactic acid) (PLA), poly(butylene adipate-co-terephthalate) (PBAT) and tetrabutyltitanate (TBT) blend resulting in the formation of polymer composite. The introduction of AgKaol could improve the barrier and the crystallization properties of PLA/PBAT/TBT blend. The barrier property of composite polymer was investigated by water vapor permeability (WVP) to study the influence of AgKaol content (0.0, 1.0, 2.0, 3.0 and 4.0 phr) in polymer matrix. The values of WVP decreased with increasing AgKaol content and amount of crystallite in PLA composite. The cold crystallization property of this PLA/PBAT/TBT composited with 0.0, 2.0 and 4.0 phr of AgKaol was completely investigated by the non-isothermal differential scanning calorimetry (DSC) technique. From the non-isothermal DSC analysis, the crystallization rates (dX(T)/dt) of PLA composite increased with increasing of the heating rate and AgKaol content. The Avrami, Ozawa and Liu models were applied to describe the non-isothermal crystallization kinetics and determine crystallization parameters for PLA/PBAT/TBT/AgKaol composite. The crystallization mechanism of PLA/PBAT/TBT/AgKaol composite was proposed thorough the nucleation and three dimension growths. The activation energies of crystallization (E_a) were determined by the Kissinger-Akahira-Sunose (KAS) isoconversional method. The determined E_a for the crystallizations of PLA/PBAT/TBT with 4.0 phr of AgKaol were lower than 2.0 and 0.0 phr, respectively. Polarized optical microscopy (POM) showed more and larger spherulites with a nanocrystal structure of PLA/PBAT/TBT/AgKaol composite than neat PLA. The nucleating effect of AgKaol on PLA/PBAT/TBT blend might be useful for preparation of PLA composite as a gas barrier protection material in the future. Corresponding to the melt flow index (MFI) results, PLA composites could produce as a film with promising antibacterial packaging due to silver nanoparticles in AgKaol.

载银高岭石 (AgKaol) 是一种抗菌剂和屏障增强剂，被掺入聚乳酸 (PLA)、聚己二酸丁二酯共对苯二甲酸酯 (PBAT) 和钛酸四丁酯 (TBT) 混合物中，从而形成聚合物复合材料的形成。AgKaol 的引入可以提高 PLA/PBAT/TBT 共混物的阻隔性和结晶性能。通过水蒸气渗透率（WVP）研究复合聚合物的阻隔性能，以研究聚合物基体中AgKaol含量（0.0、1.0、2.0、3.0和4.0 phr）的影响。WVP 值随着 AgKaol 含量和 PLA 复合材料中微晶数量的增加而降低。0.0、2.0和4复合PLA/PBAT/TBT的冷结晶性能。通过非等温差示扫描量热法 (DSC) 技术完全研究了 0 phr 的 AgKaol。从非等温 DSC 分析来看，结晶速率 (dPLA复合材料的X ( T )/d t )随着加热速率和AgKaol含量的增加而增加。Avrami、Ozawa 和 Liu 模型用于描述非等温结晶动力学并确定 PLA/PBAT/TBT/AgKaol 复合材料的结晶参数。通过成核和三维生长提出了PLA/PBAT/TBT/AgKaol复合材料的结晶机理。结晶活化能 ( E _a ) 由 Kissinger-Akahira-Sunose (KAS) 等转化方法确定。确定的E _a对于 PLA/PBAT/TBT 与 4.0 phr AgKaol 的结晶，分别低于 2.0 和 0.0 phr。偏光显微镜 (POM) 显示，与纯 PLA 相比，具有 PLA/PBAT/TBT/AgKaol 复合材料的纳米晶体结构的球晶更多、更大。AgKaol 对 PLA/PBAT/TBT 共混物的成核作用可能有助于制备 PLA 复合材料作为未来的气体阻隔保护材料。与熔体流动指数 (MFI) 结果相对应，由于 AgKaol 中的银纳米颗粒，PLA 复合材料可以制成具有良好抗菌包装的薄膜。