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Waterborne isocyanate-free polyurethane epoxy hybrid coatings synthesized from sustainable fatty acid diamine
Green Chemistry ( IF 9.3 ) Pub Date : 2020/01/24 , DOI: 10.1039/c9gc03335a Cheng Zhang 1, 2, 3, 4, 5 , Haoran Wang 1, 2, 3, 4, 5 , Qixin Zhou 1, 2, 3, 4, 5
Green Chemistry ( IF 9.3 ) Pub Date : 2020/01/24 , DOI: 10.1039/c9gc03335a Cheng Zhang 1, 2, 3, 4, 5 , Haoran Wang 1, 2, 3, 4, 5 , Qixin Zhou 1, 2, 3, 4, 5
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The coatings industry is increasingly aware of the need to protect the environment and is constantly striving to ensure the safety of the industry and the health of consumers, which creates demand for environmentally friendly non-isocyanate polyurethanes (NIPU). In this study, the waterborne NIPU epoxy hybrid coatings were prepared from waterborne amine-terminated NIPU and waterborne epoxy chain extender. The waterborne amine-terminated NIPU were derived from diglycerol dicarbonate, 3,3′-diamino-N-methyldipropylamine, and fatty acid diamine (FDA). The waterborne epoxy chain extender was synthesized from diethanolamine and trimethylolpropane triglycidyl ether. The Fourier transform infrared spectroscopy and nuclear magnetic resonance were applied to confirm the chemical structure of synthesized materials. The effect of the soft/hard segment on waterborne NIPU epoxy hybrid coatings was studied by differential scanning calorimetry, thermogravimetric analysis, and tensile tests. Two glass transition temperatures were found in the samples with the largest amount of FDA while only one glass transition temperature was found on the other two samples. The thermal stability was enhanced by incorporating a higher amount of FDA. Finally, Young's modulus and tensile strength decreased with an increasing amount of soft segment and elongation-at-break was increased as expected. In general, this work explored the method for preparing waterborne non-isocyanate polyurethane epoxy hybrid coatings, which could reveal similar soft/hard segment performance with conventional isocyanate-based waterborne polyurethane.
中文翻译：
由可持续脂肪酸二胺合成的无水异氰酸酯聚氨酯环氧杂化涂料
涂料行业越来越意识到保护环境的必要性，并且正在不断努力确保行业的安全性和消费者的健康，从而产生了对环保型非异氰酸酯聚氨酯（NIPU）的需求。在这项研究中，水性NIPU环氧杂化涂料是由水性胺封端的NIPU和水性环氧扩链剂制备的。水性胺端基NIPU衍生自二碳酸二甘油酯3,3'-diamino- N-甲基二丙胺和脂肪酸二胺（FDA）。水性环氧扩链剂是由二乙醇胺和三羟甲基丙烷三缩水甘油醚合成的。傅里叶变换红外光谱和核磁共振被用来确认合成材料的化学结构。通过差示扫描量热法，热重分析和拉伸试验研究了软/硬链段对水性NIPU环氧杂化涂料的影响。在FDA含量最高的样品中发现两个玻璃化转变温度，而在其他两个样品中仅发现一个玻璃化转变温度。通过加入更多的FDA可以提高热稳定性。最后，杨 s模量和拉伸强度随软段数量的增加而降低，断裂伸长率如预期的那样增加。通常，这项工作探索了制备水性非异氰酸酯聚氨酯环氧杂化涂料的方法，该方法可以显示出与常规异氰酸酯基水性聚氨酯相似的软/硬链段性能。
更新日期：2020-02-24
中文翻译：
由可持续脂肪酸二胺合成的无水异氰酸酯聚氨酯环氧杂化涂料
涂料行业越来越意识到保护环境的必要性，并且正在不断努力确保行业的安全性和消费者的健康，从而产生了对环保型非异氰酸酯聚氨酯（NIPU）的需求。在这项研究中，水性NIPU环氧杂化涂料是由水性胺封端的NIPU和水性环氧扩链剂制备的。水性胺端基NIPU衍生自二碳酸二甘油酯3,3'-diamino- N-甲基二丙胺和脂肪酸二胺（FDA）。水性环氧扩链剂是由二乙醇胺和三羟甲基丙烷三缩水甘油醚合成的。傅里叶变换红外光谱和核磁共振被用来确认合成材料的化学结构。通过差示扫描量热法，热重分析和拉伸试验研究了软/硬链段对水性NIPU环氧杂化涂料的影响。在FDA含量最高的样品中发现两个玻璃化转变温度，而在其他两个样品中仅发现一个玻璃化转变温度。通过加入更多的FDA可以提高热稳定性。最后，杨 s模量和拉伸强度随软段数量的增加而降低，断裂伸长率如预期的那样增加。通常，这项工作探索了制备水性非异氰酸酯聚氨酯环氧杂化涂料的方法，该方法可以显示出与常规异氰酸酯基水性聚氨酯相似的软/硬链段性能。
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