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通过反应性氧化石墨烯使生物可降解聚乳酸/聚己二酸丁二醇酯-对苯二甲酸丁二醇酯共混物增容用于基于螺杆的3D打印

Compatibilizing Biodegradable Poly(lactic acid)/polybutylene adipate-co-terephthalate Blends via Reactive Graphene Oxide for Screw-Based 3D Printing.

作者信息

Yu Wei, Hu Zhonglue, Zhang Ye, Zhang Yakuang, Dong Weiping, Li Xiping, Wang Sisi

机构信息

College of Physics and Electronic Information Engineering, Zhejiang Normal University, Jinhua 321004, China.

Key Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology & Equipment of Zhejiang Province, College of Engineering, Zhejiang Normal University, Jinhua 321004, China.

出版信息

Polymers (Basel). 2023 Oct 4;15(19):3992. doi: 10.3390/polym15193992.

DOI:10.3390/polym15193992

PMID:37836041

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10575447/

Abstract

Vinyl-functionalized graphene oxide (VGO) was used as a reactive compatibilizer to prepare poly(lactic acid)/polybutylene adipate-co-terephthalate (PLA/PBAT) blends. The linear rheological and scanning electron microscopy results confirmed that the VGO nanosheets were quite efficient in compatibilizing PLA/PBAT blends. The size of the PBAT dispersed phase was remarkably decreased in the presence of VGO nanosheets. Moreover, the VGO nanosheets exhibited strong nucleating effects on the crystallization process of PLA. The crystallinity of PLA component in the compatibilized blend with various VGO nanosheets was higher than 40%, upon the cooling rate of 20 °C/min. The prepared PLA/PBAT pellets were applied to 3D printing, using a self-developed screw-based 3D printer. The results showed that all the prepared PLA/PBAT blend pellets can be 3D printed successfully. The notched Izod impact test results showed that, in the presence of VGO, an increase of at least 142% in impact strength was achieved for PLA/PBAT blend. This could be attributed to the compatibilizing effect of the VGO nanosheets. Thus, this work provides a novel way to prepare tough PLA-based materials for 3D printing.

摘要

乙烯基功能化氧化石墨烯（VGO）被用作反应性增容剂来制备聚乳酸/聚己二酸丁二醇酯-对苯二甲酸丁二醇酯共聚物（PLA/PBAT）共混物。线性流变学和扫描电子显微镜结果证实，VGO纳米片在增容PLA/PBAT共混物方面非常有效。在VGO纳米片存在下，PBAT分散相的尺寸显著减小。此外，VGO纳米片对PLA的结晶过程表现出强烈的成核作用。在20℃/min的冷却速率下，与各种VGO纳米片增容的共混物中PLA组分的结晶度高于40%。使用自行研制的基于螺杆的3D打印机，将制备的PLA/PBAT粒料应用于3D打印。结果表明，所有制备的PLA/PBAT共混粒料都能成功地进行3D打印。缺口悬臂梁冲击试验结果表明，在VGO存在下，PLA/PBAT共混物的冲击强度至少提高了142%。这可归因于VGO纳米片的增容作用。因此，这项工作为制备用于3D打印的坚韧PLA基材料提供了一种新方法。