Effects of a poly(hydroxyalkanoate) elastomer and kraft pulp fibres on biocomposite properties and three-dimensional (3D) printability of filaments for fused deposition modelling

IF 20.2 Q1 MATERIALS SCIENCE, PAPER & WOOD
Sandra Rodríguez-Fabià, Gary Chinga-Carrasco
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引用次数: 7

Abstract

Three-dimensional (3D) printing is a useful technique that allows the creation of objects with complex structures by deposition of successive layers of material. These materials are often from fossil origin. However, efforts are being made to produce environmentally friendly materials for 3D printing. The addition of lignocellulosic fibres to a polymer matrix is one of the alternatives to replace, for instance, glass fibres in composites as reinforcing materials. The fields of biocomposites and 3D printing open innovative application areas for pulp fibres from the pulp and paper industry. In this work, biocomposites of poly(lactic acid) (PLA), poly(hydroxyalkanoate) (PHA) and kraft pulp fibres were prepared in order to find a suitable formulation for filaments for 3D printing. The effect of two different types of kraft fibres (bleached (B) and unbleached (U)) and of PHA on the mechanical and thermal properties of the biocomposites was assessed. The addition of 30% kraft fibres to PLA resulted in an increase of the tensile modulus from 3074 to ∼4800 MPa. In the case of biocomposites containing PHA (50% PLA/20% PHA/30% kraft) the increase in modulus was more moderate (PLA+PHA+U: 3838 MPa, and PLA+PHA+B: 3312 MPa). The tensile strength of PLA (66 MPa) increased to 77 MPa in PLA+kraft biocomposites, while a reduction in strength was observed for PLA+PHA+U (43 MPa) and PLA+PHA+B (32 MPa). Filaments prepared with PLA, PHA and bleached and unbleached pulp fibres showed similar printability of complex geometries, demonstrating that unbleached pulp fibres could also be utilized in the preparation of biocomposites with good mechanical performance and 3D printing properties.

聚羟基烷酸酯弹性体和硫酸盐纸浆纤维对生物复合材料性能和熔融沉积模型长丝三维(3D)可打印性的影响
三维(3D)打印是一种有用的技术,它允许通过沉积连续的材料层来创建具有复杂结构的物体。这些材料通常来自化石。然而,人们正在努力为3D打印生产环保材料。将木质纤维素纤维添加到聚合物基体中是替代复合材料中玻璃纤维作为增强材料的替代品之一。生物复合材料和3D打印领域为纸浆和造纸工业的纸浆纤维开辟了创新的应用领域。在这项工作中,制备了聚乳酸(PLA)、聚羟基烷酸酯(PHA)和牛皮纸纸浆纤维的生物复合材料,以找到适合3D打印的长丝配方。评估了两种不同类型的牛皮纤维(漂白(B)和未漂白(U))和PHA对生物复合材料力学和热性能的影响。PLA中加入30%的牛皮纤维导致拉伸模量从3074增加到~ 4800 MPa。在含有PHA (50% PLA/20% PHA/30%硫酸盐)的生物复合材料中,模量的增加更为温和(PLA+PHA+U: 3838 MPa, PLA+PHA+B: 3312 MPa)。PLA+牛皮纸生物复合材料的抗拉强度由66 MPa提高到77 MPa, PLA+PHA+U和PLA+PHA+B的抗拉强度分别为43 MPa和32 MPa。PLA、PHA、漂白和未漂白纸浆纤维制备的长丝具有相似的复杂几何形状的可打印性,表明未漂白纸浆纤维也可用于制备具有良好力学性能和3D打印性能的生物复合材料。
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来源期刊
Journal of Bioresources and Bioproducts
Journal of Bioresources and Bioproducts Agricultural and Biological Sciences-Forestry
CiteScore
39.30
自引率
0.00%
发文量
38
审稿时长
12 weeks
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