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用于丙烯酸酯改性聚乳酸/木质素共混物3D打印的数字光处理路线：微观结构与机械性能

Digital Light Processing Route for 3D Printing of Acrylate-Modified PLA/Lignin Blends: Microstructure and Mechanical Performance.

作者信息

Guessasma Sofiane, Stephant Nicolas, Durand Sylvie, Belhabib Sofiane

机构信息

INRAE, Research Unit BIA UR1268, Rue Geraudiere, F-44316 Nantes, France.

Nantes Université, CNRS, Institut des Matériaux Jean Rouxel, IMN, F-44300 Nantes, France.

出版信息

Polymers (Basel). 2024 May 9;16(10):1342. doi: 10.3390/polym16101342.

DOI:10.3390/polym16101342
PMID:38794534
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11124854/
Abstract

In this study, digital light processing (DLP) was utilized to generate 3D-printed blends composed of photosensitive acrylate-modified polylactic acid (PLA) resin mixed with varying weight ratios of lignin extracted from softwood, typically ranging from 5 wt% to 30 wt%. The microstructure of these 3D-printed blends was examined through X-ray microtomography. Additionally, the tensile mechanical properties of all blends were assessed in relation to the weight ratio and post-curing treatment. The results suggest that post-curing significantly influences the tensile properties of the 3D-printed composites, especially in modulating the brittleness of the prints. Furthermore, an optimal weight ratio was identified to be around 5 wt%, beyond which UV light photopolymerization experiences compromises. These findings regarding acrylate-modified PLA/lignin blends offer a cost-effective alternative for producing 3D-printed bio-sourced components, maintaining technical performance in reasonable-cost, low-temperature 3D printing, and with a low environmental footprint.

摘要

在本研究中，利用数字光处理（DLP）技术生成了由光敏丙烯酸酯改性聚乳酸（PLA）树脂与从软木中提取的不同重量比木质素混合而成的3D打印共混物，重量比通常为5 wt%至30 wt%。通过X射线显微断层扫描检查了这些3D打印共混物的微观结构。此外，还评估了所有共混物的拉伸力学性能与重量比及后固化处理的关系。结果表明，后固化对3D打印复合材料的拉伸性能有显著影响，特别是在调节打印件的脆性方面。此外，确定最佳重量比约为5 wt%，超过此比例，紫外光光聚合会受到影响。这些关于丙烯酸酯改性PLA/木质素共混物的发现为生产3D打印生物源部件提供了一种经济高效的替代方案，在合理成本、低温3D打印中保持技术性能，且对环境影响较小。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad94/11124854/5fd86d97ebe5/polymers-16-01342-g013a.jpg
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