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首页> 外文期刊>RSC Advances >Studies on the effects of different multiwalled carbon nanotube functionalization techniques on the properties of bio-based hybrid non-isocyanate polyurethane
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Studies on the effects of different multiwalled carbon nanotube functionalization techniques on the properties of bio-based hybrid non-isocyanate polyurethane

机译：不同多壁碳纳米管官能化技术对生物基杂交非异氰酸酯聚氨酯性能的影响研究

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摘要

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 via a reduction reaction and Fe _(3) O _(4) 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) via 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 T _(g) value, the best thermal, thermodynamic and mechanical properties, and excellent pencil hardness, adhesion, flexibility and impact strength, while HNIPU composited with MWCNTs–COOH–NH _(2) had the best water absorption and swelling properties. These results showed that the properties of hybrid non-isocyanate polyurethane can be adjusted via different MWCNT surface modification approaches or the addition of nanoparticles, so this kind of polyurethane has a vast development space for coating applications.
机译：本文提出了一种用于多壁碳纳米管（MWCNT）改性生物基杂化非异氰酸酯聚氨酯（HNIPU）的新型合成方法。系统地研究了MWCNTS-HNIPU几种性能的改性方法。使用缩合回流装置用羧基和氨基接枝MWCNT。通过还原反应，在MWCNT的表面上合成Au纳米颗粒，使用水热法在MWCNT上装饰Fe _（3）O _（4）颗粒。使用FTIR，TEM，XRD，XPS和拉曼技术来确认组合物和结构。然后，使用五种不同类型的MWCNT用于通过溶液方法与非异氰酸酯聚氨酯（NIPU）混合。用环氧树脂E-51固化后，将交联复合材料作为涂层施用。一系列测试证明，HNIPU与MWCNTS-COOH-AU合作的T _（g）值最高，最佳的热，热力学和机械性能，以及优异的铅笔硬度，粘附，柔韧性和冲击强度，而HNIPU与MWCNT合作-COOH-NH _（2）具有最佳的吸水和溶胀性能。这些结果表明，杂化非异氰酸酯聚氨酯的性质可以通过不同的MWCNT表面改性方法或加入纳米颗粒来调节，因此这种聚氨酯具有涂层应用的广阔的发展空间。

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