Ultrafine bamboo-char as a new reinforcement in poly(lactic acid)/bamboo particle biocomposites: The effects on mechanical, thermal, and morphological properties
Ultrafine bamboo-char as a new reinforcement in poly(lactic acid)/bamboo particle biocomposites: The effects on mechanical, thermal, and morphological properties
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DOI：
10.1557/jmr.2018.290
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发表时间：
2018-08
影响因子：
2.7
通讯作者：
Shaoping Qian;Yingying Tao;Yiping Ruan;Cesar A. Fontanillo Lopez;Linqiong Xu
中科院分区：
文献类型：
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作者：
Shaoping Qian;Yingying Tao;Yiping Ruan;Cesar A. Fontanillo Lopez;Linqiong Xu
在本研究中，将不同含量的超细竹炭(UFBC)引入到聚乳酸/竹子颗粒(BP)生物复合材料中作为新的增强材料，以改善生物复合材料的力学性能、热性能和形态性能。这一新的策略旨在通过一种简单的方法实现聚乳酸复合材料的增强增韧协同效应，而不需要表面改性和其他添加剂。当UFBC含量为5.0wt%时，复合材料的拉伸强度、弹性模量和断裂伸长率达到最大值，分别为45.2 Mpa、540.50 Mpa和7.53%，略低于纯聚乳酸。当UFBC含量为5.0wt%时，三元生物复合材料的最大弹性模量为5316.1 Mpa，约为纯聚乳酸的2倍。当UFBC含量为5wt%时，冲击强度达到最大值38.56J/m，与纯聚乳酸7.88J/m相比提高了376%，与20.50J/m的聚乳酸/BP二元复合材料相比提高了88%。得到了类似混凝土的微观结构体系(即水泥、砂和钢筋分别对应于聚乳酸、UFBC和BP)。
In this study, varying contents of ultrafine bamboo-char (UFBC) were introduced into PLA/bamboo particle (BP) biocomposites as new reinforcements to improve the mechanical, thermal, and morphological properties of the biocomposites. The new strategy was aiming to realize the synergistic effects of reinforcement and toughening of poly(lactic acid) (PLA) composites through a simple method without surface modification and other additives. The maximum tensile strength, modulus, and elongation at break of 45.20 MPa, 540.50 MPa, and 7.53% were reached at 5.0 wt% UFBC content, which were slightly lower than those of pure PLA. The maximum modulus of elasticity of the ternary biocomposites was 5316.1 MPa at 5.0 wt% UFBC content, which was approximately 2 times higher than the pure PLA. Impact strength reached a maximum value of 38.56 J/m when the UFBC content was 5 wt%, and improved by 376% compared with pure PLA of 7.88 J/m. Meanwhile, compared with the PLA/BP binary composite of 20.50 J/m, it improved 88%. A concrete-like microstructure system was achieved (i.e., cement, sand, and rebar corresponding to PLA, UFBC, and BP, respectively).