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Chemically modified bamboo fiber/ABS composites for high-quality additive manufacturing
Polymer Journal ( IF 2.3 ) Pub Date : 2021-07-29 , DOI: 10.1038/s41428-021-00540-9
Nuno Gama 1 , Sandra Magina 1 , Ana Barros-Timmons 1 , Artur Ferreira 2
Affiliation  

Additive manufacturing enables the creation of lighter, stronger parts and systems. To improve the 3-dimensional (3D) printed quality of bio-based composites, in this study, bamboo fibers were chemically modified via a two-step reaction. In the first step, NCO groups (of a diisocyanate) were grafted onto the surface of fibers, which were subsequently reacted with a polyol. The chemical modification was confirmed by spectroscopic analysis; the hydrophobicity, density, and thermal degradation of the fibers were also evaluated. Afterward, 3D-printed objects were produced using these fibers. First, the printability of these composites was assessed by analyzing their melting flow index (MFI) and glass transition temperature (Tg) values. Next, the enhancement of the 3D printing quality was confirmed by analyzing the morphology of the 3D-printed specimens. The advantage of using treated fibers was reflected in the improved mechanical performance of the obtained 3D specimens.



中文翻译:

用于高质量增材制造的化学改性竹纤维/ABS复合材料

增材制造能够制造更轻、更坚固的零件和系统。为了提高生物基复合材料的 3D (3D) 打印质量,在本研究中,竹纤维通过两步反应进行了化学改性。在第一步中,NCO 基团(二异氰酸酯的)接枝到纤维表面,随后与多元醇反应。化学修饰经光谱分析证实;还评估了纤维的疏水性、密度和热降解。之后,使用这些纤维生产了 3D 打印物体。首先,通过分析它们的熔融流动指数 (MFI) 和玻璃化转变温度 ( T g) 值。接下来,通过分析 3D 打印样品的形态来确认 3D 打印质量的提高。使用处理过的纤维的优势体现在所获得的 3D 样品的机械性能得到改善。

更新日期:2021-07-29
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