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首页> 外文期刊>Journal of Polymers and the Environment >Polyhydroxyalkanoates/Fibrillated Nanocellulose Composites for Additive Manufacturing
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Polyhydroxyalkanoates/Fibrillated Nanocellulose Composites for Additive Manufacturing

机译：聚羟基烷烷/原纤化纳米纤维素复合材料用于添加剂制造

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摘要

Novel poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)(PHBH)/fibrillated nanocellulose biodegradable composites for additive manufacturing were produced and characterized. Fibrillated nanocellulose (NCF) was isolated with high energy ultrasonication and dispersed via solution mixing in the polymer matrix. Composite filaments having a nanofiller concentration of 0.5wt%, 1wt% and 3wt% were then extruded, characterized and used in fused deposition modeling (FDM). Neat PHBH powder was then manually added to prepare a solid mixture at different fibrillated nanocellulose concentrations (from 0.5 to 3 wt%), to be then used to feed an extruder. SEM observations on filaments and 3D printed samples evidenced the good dispersion of fibrillated nanocellulose inside the matrix with the presence of agglomerates at higher NCF contents. The beneficial effects of the fibrillated nanocellulose in terms of stress at break and of elongation at break showed a maximum at a fibrillated nanocellulose content of 0.5 wt%. Moreover, the presence of fibrillated nanocellulose did not affect the thermal degradation behaviour of the materials, and also the glass transition and the melting temperatures were not influenced by NCF addition.
机译：制备新型聚（3-羟基丁酸酯-CO-3-羟基己酸酯）（PHBH）/原纤化纳米纤维素可生物降解复合材料，并表征。用高能量超声处理分离原纤化纳米纤维素（NCF），并通过溶液混合在聚合物基质中分散。然后将纳米填充浓度为0.5wt％，1wt％和3wt％的复合孔挤出，其特征在于和用于融合沉积建模（FDM）。然后手动加入纯pHBH粉末以在不同的原纤化纳米纤维素浓度（0.5至3wt％）下制备固体混合物，然后用于进料器。关于长丝和3D印刷样品的SEM观察证明了原纤化纳米纤维素在基质内的良好分散在较高的NCF含量下的凝聚物中。原纤维化纳米纤维素在断裂和断裂伸长率下的应力方面的有益效果显示出最大的原纤化纳米纤维素含量为0.5wt％。此外，原纤化纳米纤维素的存在不影响材料的热劣化行为，并且玻璃化转变和熔化温度不会受到NCF的影响。

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