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不同多壁碳纳米管功能化技术对生物基杂化非异氰酸酯聚氨酯性能影响的研究

Studies on the effects of different multiwalled carbon nanotube functionalization techniques on the properties of bio-based hybrid non-isocyanate polyurethane.

作者信息

He Xin, Xu Xiaoling, Bo Guangxu, Yan Yunjun

机构信息

Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology Wuhan 430074 China

出版信息

RSC Adv. 2020 Jan 10;10(4):2180-2190. doi: 10.1039/c9ra08695a. eCollection 2020 Jan 8.

DOI:10.1039/c9ra08695a
PMID:35494582
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9048836/
Abstract

A novel synthesis method for multiwalled carbon nanotube (MWCNT) modified bio-based hybrid non-isocyanate polyurethane (HNIPU) is proposed in this paper. Modification methods for several properties of MWCNTs-HNIPU were systematically studied. MWCNTs were grafted with carboxyl and amino groups using a condensation reflux device. Au nanoparticles were synthesized on the surface of the MWCNTs a reduction reaction and FeO particles were decorated on the MWCNTs using a hydrothermal method. FTIR, TEM, XRD, XPS and Raman techniques were employed to confirm the compositions and structures. Then, five different types of MWCNT were utilized for blending with non-isocyanate polyurethane (NIPU) solution methods. After curing with epoxy resin E-51, the cross-linked composites were applied as coatings. A series of tests demonstrated that HNIPU composited with MWCNTs-COOH-Au had the highest value, the best thermal, thermodynamic and mechanical properties, and excellent pencil hardness, adhesion, flexibility and impact strength, while HNIPU composited with MWCNTs-COOH-NH had the best water absorption and swelling properties. These results showed that the properties of hybrid non-isocyanate polyurethane can be adjusted different MWCNT surface modification approaches or the addition of nanoparticles, so this kind of polyurethane has a vast development space for coating applications.

摘要

本文提出了一种新型的多壁碳纳米管（MWCNT）改性生物基杂化非异氰酸酯聚氨酯（HNIPU）的合成方法。系统研究了MWCNTs-HNIPU几种性能的改性方法。使用冷凝回流装置将羧基和氨基接枝到MWCNTs上。通过还原反应在MWCNTs表面合成金纳米颗粒，并采用水热法在MWCNTs上修饰FeO颗粒。利用傅里叶变换红外光谱（FTIR）、透射电子显微镜（TEM）、X射线衍射（XRD）、X射线光电子能谱（XPS）和拉曼光谱技术来确认其组成和结构。然后，采用溶液法将五种不同类型的MWCNT与非异氰酸酯聚氨酯（NIPU）共混。用环氧树脂E-51固化后，将交联复合材料用作涂料。一系列测试表明，与MWCNTs-COOH-Au复合的HNIPU具有最高的 值、最佳的热性能、热力学性能和机械性能，以及优异的铅笔硬度、附着力、柔韧性和冲击强度，而与MWCNTs-COOH-NH复合的HNIPU具有最佳的吸水性和溶胀性能。这些结果表明，杂化非异氰酸酯聚氨酯的性能可以通过不同的MWCNT表面改性方法或添加纳米颗粒来调节，因此这种聚氨酯在涂料应用方面具有广阔的发展空间。

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