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热敏的PLA/PU/MXene形状记忆聚合物混合纳米复合材料:机械,热和形状记忆性能

Rajita Sanaka¹, Santosh Kumar Sahu¹, P S Rama Sreekanth¹

¹School of Mechanical Engineering, VIT-AP University, Besides A.P. Secretariat, Amaravati 522237, Andhra Pradesh, India.

|February 13, 2025

概括

这项研究使用聚乳酸 (PLA) 和聚氨 (PU) 与MXene一起开发了热敏的聚合物纳米复合材料. 30%的PLA/PU/MXene混合物表现出最佳的形状记忆性能,提高了材料的性能.

科学领域:

材料科学材料科学材料科学
聚合物科学聚合物科学
纳米技术纳米技术

背景情况:

形状记忆聚合物 (SMP) 提供可调节的恢复特性.
聚合物混合物和纳米复合材料增强了机械和热特性.
加入MXene可以改善聚合物矩阵的特性.

研究的目的:

制造和表征热敏的聚乳酸 (PLA) /聚氨 (PU) /MXene形状记忆的聚合物混合纳米复合材料.
研究不同PLA含量对机械,热和形状记忆性能的影响.
为了确定最佳组合以提高性能.

主要方法:

制造PLA/PU/MXene纳米复合材料,含有不同PLA含量 (10-50%) 和固定的0.5%重量%MXene.
机械测试:最终抗拉强度,延长率,曲强度.
微结构分析 (SEM),差分扫描热量测量 (DSC),热重力测量分析 (TGA).
形状记忆测试以评估形状固定性和恢复.

主要成果:

50%的PLA/PU/MXene混合物显示最终拉伸强度增加了300%,曲强度增加了400%.
结晶度从33% (PU) 增加到45% (50%的混合物),热稳定性得到改善 (开始T:185°C到212°C).
30%的PLA/PU/MXene混合物表现出最好的形状固定性和恢复性,更高的PLA含量降低了形状记忆效率.

结论:

PLA/PU/MXene纳米复合材料表现出显著增强的机械和热性能.
在30%的PLA含量下,可以达到最佳的形状记忆性能.
该研究提供了关于为特定应用设计先进形状记忆聚合物纳米复合材料的见解.

关键词:

这就是MXene MXene.这就是为什么PLA PLA PLA.它们是PU PU PU.混合复合材料混合复合材料

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