利用无溶剂原位聚合技术制造生物基热塑性聚氨酯/碳纳米管复合材料,用于 3D 打印灯丝应用

IF 2.2 4区 工程技术 Q1 MATERIALS SCIENCE, TEXTILES
Eun Joo Shin, Jae Hyun Son, Hyeri Jun, Sunhee Lee
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引用次数: 0

摘要

热塑性聚氨酯(TPU)具有出色的抗冲击性和耐磨性、优异的机械性能以及低温下的柔韧性,是备受青睐的 3D 打印材料聚合物。增强 TPU 的导电性大大拓宽了其应用范围,为其在先进柔性电子产品、可穿戴技术和改进型工业部件中的应用铺平了道路。添加导电填料(如多壁碳纳米管)可提高热塑性聚氨酯的导电性。在本研究中,我们用生物基多元醇(聚三甲醚乙二醇)和扩链剂(1,3 丙二醇)合成了热塑性聚氨酯,并通过原位聚合添加了少量的碳纳米管,在不使用任何有害溶剂的情况下提高了其导电性。CNT 的含量在 0.75 至 3.75 wt% 之间变化,CNT 含量为 3.75 wt% 时,拉伸强度为 13.45 ± 0.3 MPa,最大断裂伸长率为 859% ± 6%,硬度为 77 ± 2 Shore A,导电率最高(2.26 × 10-4 S/cm)。由于这些物理特性足以满足 3D 打印的要求,因此本文开发的 TPU/CNT 复合材料在需要导电材料的应用中大有可为。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Manufacturing of Bio-Based TPU/CNT Composites Using Solvent-Free In-Situ Polymerization for 3D Printing Filament Applications

Thermoplastic polyurethane (TPU) is a highly favored polymer for 3D printing materials due to its excellent impact and abrasion resistance, superior mechanical properties, and flexibility at low temperatures. Enhancing TPU with conductivity considerably broadens its application range, paving the way for its use in advanced flexible electronics, wearable technologies, and improved industrial components. The addition of electrically conductive fillers such as multi-wall carbon nanotubes (MWCNTs) can improve the conductivity of TPU. In this study, we synthesized TPU with a bio-based polyol (polytrimethyleneether glycol) and chain extender (1,3 propanediol) and improved its conductivity by adding a small amount of CNTs via in situ polymerization without using any harmful solvents. The CNT content was varied from 0.75 to 3.75 wt% and to achieve a tensile strength of 13.45 ± 0.3 MPa, a maximum elongation at break of 859% ± 6%, a hardness of 77 ± 2 Shore A, and the highest conductivity (2.26 × 10−4 S/cm) with 3.75 wt% of CNTs. Because these physical properties are sufficient for 3D printing, the TPU/CNT composites developed herein can be promising in applications requiring conductive materials.

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来源期刊
Fibers and Polymers
Fibers and Polymers 工程技术-材料科学:纺织
CiteScore
3.90
自引率
8.00%
发文量
267
审稿时长
3.9 months
期刊介绍: -Chemistry of Fiber Materials, Polymer Reactions and Synthesis- Physical Properties of Fibers, Polymer Blends and Composites- Fiber Spinning and Textile Processing, Polymer Physics, Morphology- Colorants and Dyeing, Polymer Analysis and Characterization- Chemical Aftertreatment of Textiles, Polymer Processing and Rheology- Textile and Apparel Science, Functional Polymers
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