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Enhanced thermal properties of poly(lactic acid)/MoS2/carbon nanotubes composites.
Scientific Reports ( IF 4.6 ) Pub Date : 2020-01-20 , DOI: 10.1038/s41598-020-57708-1
Piotr Homa 1 , Karolina Wenelska 1 , Ewa Mijowska 1
Affiliation  

In this work, few-layered molybdenum disulfide (MoS2) was functionalized with metal oxide (MxOy) nanoparticles which served as a catalyst for carbon nanotubes (CNT) growth in the chemical vapour deposition (CVD) process. The resulting MoS2/MxOy/CNT functionalized nanomaterials were used for flame retarding application in poly(lactic acid) (PLA). The composites were extruded with a twin-screw extruder with different wt% loading of the nanomaterial. Full morphology characterization was performed, as well as detailed analysis of fire performance of the obtained composites in relation to pristine PLA and PLA containing an addition of the composites. The samples containing the addition of MoS2/MxOy/CNT displayed up to over 90% decrease in carbon oxide (CO) emission during pyrolysis in respect to pristine PLA. Microscale combustion calorimetry testing revealed reduction of key parameters in comparison to pristine PLA. Laser flash analysis revealed an increase in thermal conductivity of composite samples reaching up to 65% over pristine PLA. These results prove that few-layered 2D nanomaterials such as MoS2 functionalized with CNT can be effectively used as flame retardance of PLA.

中文翻译:

聚乳酸/ MoS2 /碳纳米管复合材料的增强的热性能。

在这项工作中,用金属氧化物(MxOy)纳米粒子对几层二硫化钼(MoS2)进行了功能化,该金属氧化物在化学气相沉积(CVD)过程中用作碳纳米管(CNT)生长的催化剂。所得的MoS2 / MxOy / CNT官能化纳米材料用于聚乳酸(PLA)的阻燃应用。用具有不同wt%纳米材料负载的双螺杆挤出机挤出复合材料。进行了完整的形态表征,并详细分析了所得复合材料相对于原始PLA和包含复合材料的PLA的防火性能。相对于原始的PLA,含有MoS2 / MxOy / CNT的样品在热解过程中表现出的二氧化碳(CO)排放量减少多达90%以上。微型燃烧量热法测试显示,与原始PLA相比,关键参数减少了。激光闪光分析表明,与原始PLA相比,复合材料样品的热导率提高了65%。这些结果证明,很少层的二维纳米材料,例如用CNT功能化的MoS2,可以有效地用作PLA的阻燃性。
更新日期:2020-01-21
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