当前位置: X-MOL 学术Plast. Rubber Compos. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Thermal conductivity enhancement of PLA/TPU/BN composites by controlling BN distribution and annealing treatment
Plastics, Rubber and Composites ( IF 2 ) Pub Date : 2020-02-19 , DOI: 10.1080/14658011.2020.1729657
Wanting Shen 1 , Wei Wu 1 , Chao Liu 1 , Yi Wang 1 , Xuewei Zhang 1
Affiliation  

ABSTRACT Polylactic acid (PLA)/thermoplastic urethane (TPU)/boron nitride (BN) composites were successfully prepared, the effect of microstructure evolution along with the compositional change and annealing treatment on the thermal conductivity of composite was investigated. Owing to the selective distribution of BN in low-viscosity TPU phase, the compactness of thermally conductive networks in PLA/TPU/BN composites was reinforced. Thereby, the thermal conductivity of PLA/TPU/BN composites was obviously improved by 21.6% at 25 wt-% BN than that of PLA/BN composites. Moreover, research on the effect of annealing treatment on the thermal conductivity of composites found that the crystallinity of PLA had been improved by the recrystallisation and the thermal conductivities of composites were enhanced. Finally, due to the possible hydrogen bonding between PLA and TPU, PLA/TPU/BN composites showed no serious deterioration in mechanical properties. This work endows new enlightenment to fabricate composites with great thermal conductivity without causing serious damage to mechanical properties.

中文翻译:

通过控制BN分布和退火处理增强PLA/TPU/BN复合材料的导热系数

摘要 成功制备了聚乳酸(PLA)/热塑性聚氨酯(TPU)/氮化硼(BN)复合材料,研究了微观结构演变、成分变化和退火处理对复合材料热导率的影响。由于BN在低粘度TPU相中的选择性分布,增强了PLA/TPU/BN复合材料中导热网络的致密性。因此,PLA/TPU/BN 复合材料的热导率在 25 wt-% BN 时比 PLA/BN 复合材料的热导率明显提高了 21.6%。此外,对退火处理对复合材料热导率影响的研究发现,PLA的结晶度通过再结晶得到改善,复合材料的热导率得到提高。最后,由于 PLA 和 TPU 之间可能存在氢键,因此 PLA/TPU/BN 复合材料的机械性能没有严重恶化。这项工作为制造具有良好导热性的复合材料而不会对机械性能造成严重损害提供了新的启示。
更新日期:2020-02-19
down
wechat
bug