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用于增强4D打印应用中机械性能和形状恢复特性的多壁碳纳米管/埃洛石纳米管增强热响应形状记忆聚合物纳米复合材料的研制

Development of Multiwalled Carbon Nanotubes/Halloysite Nanotubes Reinforced Thermal Responsive Shape Memory Polymer Nanocomposites for Enhanced Mechanical and Shape Recovery Characteristics in 4D Printing Applications.

作者信息

Namathoti Sivanagaraju, Vakkalagadda Manikanta Ravindra Kumar

机构信息

School of Mechanical Engineering (SMEC), VIT-AP University, Amaravati 522237, Andhra Pradesh, India.

出版信息

Polymers (Basel). 2023 Mar 9;15(6):1371. doi: 10.3390/polym15061371.

DOI:10.3390/polym15061371
PMID:36987152
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10056962/
Abstract

The mechanical and shape-recovery characteristics of 4D-printed thermally responsive shape-memory polyurethane (SMPU) reinforced with two types of reinforcements, multiwalled carbon nanotubes (MWCNTs) and Halloysite nanotubes (HNTs), are investigated in the present study. Three weight percentages of reinforcements (0, 0.5, and 1) in the SMPU matrix are considered, and the required composite specimens are obtained with 3D printing. Further, for the first time, the present study investigates the flexural test for multiple cycles to understand the 4D-printed specimens' flexural behavior variation after shape recovery. The 1 wt% HNTS-reinforced specimen yielded higher tensile, flexural, and impact strengths. On the other hand, 1 wt% MWCNT-reinforced specimens exhibited quick shape recovery. Overall, enhanced mechanical properties were observed with HNT reinforcements, and a faster shape recovery was observed with MWCNT reinforcements. Further, the results are promising for the use of 4D-printed shape-memory polymer nanocomposites for repeated cycles even after a large bending deformation.

摘要

本研究考察了用两种增强材料（多壁碳纳米管（MWCNT）和埃洛石纳米管（HNT））增强的4D打印热响应形状记忆聚氨酯（SMPU）的机械性能和形状恢复特性。考虑了SMPU基体中三种重量百分比的增强材料（0、0.5和1），并通过3D打印获得所需的复合材料试样。此外，本研究首次对多个循环进行弯曲试验，以了解4D打印试样形状恢复后的弯曲行为变化。1 wt% HNTs增强的试样具有更高的拉伸、弯曲和冲击强度。另一方面，1 wt% MWCNT增强的试样表现出快速的形状恢复。总体而言，HNT增强材料提高了力学性能，而MWCNT增强材料实现了更快的形状恢复。此外，即使在经历大的弯曲变形后，4D打印形状记忆聚合物纳米复合材料用于重复循环的结果也很有前景。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6331/10056962/3b2c7e4bc695/polymers-15-01371-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6331/10056962/bfaad7f0e69f/polymers-15-01371-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6331/10056962/3b2c7e4bc695/polymers-15-01371-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6331/10056962/a882e2323f44/polymers-15-01371-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6331/10056962/5251328e8469/polymers-15-01371-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6331/10056962/32ff88b87f11/polymers-15-01371-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6331/10056962/ed5611e0fab8/polymers-15-01371-g004a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6331/10056962/ceb1f9e32ecd/polymers-15-01371-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6331/10056962/62f6357bbf83/polymers-15-01371-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6331/10056962/a5edd85a4086/polymers-15-01371-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6331/10056962/a81f0ff03393/polymers-15-01371-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6331/10056962/ce0d6efc0c05/polymers-15-01371-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6331/10056962/f43445550c4b/polymers-15-01371-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6331/10056962/bfaad7f0e69f/polymers-15-01371-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6331/10056962/3b2c7e4bc695/polymers-15-01371-g012.jpg

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