Fully biodegradable and renewable polymer materials have shown broad application prospects with minimal environmental degradation. In the current study, eco-friendly poly(lactic acid)/poly(butylene adipate-co-terephthalate) (PLA/PBAT) in-situ nanofibrillar composites with hierarchical crystal architectures, high mechanical performance and excellent heat resistance properties were fabricated using the loop oscillating push-pull molding (LOPPM) technique and in-situ PBAT nanofibrils were used to induce highly oriented hybrid shish-kebabs. Benefiting from the flow-induced crystallization and abundant hybrid shish-kebabs, the overall crystallinity of LOPPM-processed PLA/10 wt%PBAT sample increased by 4-fold than the conventional injection-molded (CIM) neat PLA sample. The present work indicated that the tensile strength, Young's modulus, elongation at break and impact strength of LOPPM-processed PLA/10 wt%PBAT were higher than the CIM-processed PLA by 36.2%, 12.5%, 181.8% and 253.7%, respectively. The vicat softening temperature was elevated from 59.6 °C to 104.8 °C, and the thermostability also enhanced due to the construction of hybrid shish-kebabs. Strong, tough and heat-resistant PLA/PBAT in situ nanofibrillar composites exhibited outstanding properties for use under more demanding circumstances and are environmentally friendly.

完全可生物降解和可再生的聚合物材料显示了广阔的应用前景，对环境的破坏最小。在当前的研究中，使用该材料制备了具有分层晶体结构，高机械性能和优异的耐热性能的环保型聚乳酸/聚己二酸丁二酯-对苯二甲酸乙二醇酯（PLA / PBAT）原位纳米原纤维复合材料。循环振荡推挽模塑（LOPPM）技术和原位PBAT纳米纤维被用来诱导高度定向的混合烤肉串。得益于流动诱导的结晶和丰富的混合烤肉串，LOPPM处理的PLA / 10 wt％PBAT样品的总体结晶度比传统的注塑（CIM）纯PLA样品增加了4倍。目前的工作表明，拉伸强度，杨氏模量，LOPPM处理的PLA / 10 wt％PBAT的断裂伸长率和冲击强度分别比CIM处理的PLA高36.2％，12.5％，181.8％和253.7％。维卡软化温度从59.6°C升高到104.8°C，并且由于构建了杂交羊肉串，热稳定性也得到了提高。坚固，坚韧和耐热的PLA / PBAT原位纳米原纤维复合材料表现出出色的性能，可在更苛刻的环境下使用，并且对环境友好。