Self-healing, high-performance, and high-biobased-content UV-curable coatings derived from rubber seed oil and itaconic acid
Self-healing, high-performance, and high-biobased-content UV-curable coatings derived from rubber seed oil and itaconic acid
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DOI：
10.1016/j.porgcoat.2021.106391
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发表时间：
2021-06-24
影响因子：
6.6
通讯作者：
Liu, Chengguo
中科院分区：
文献类型：
--
作者：
Huang, Jia;Zhang, Jinshuai;Liu, Chengguo
利用生物可再生资源开发自愈性紫外光固化涂料，对可持续发展和环境保护具有重要意义。本工作首次通过环氧化橡胶籽油与甲基丙烯酸缩水甘油酯修饰衣康酸前体的开环反应，合成了一种生物基紫外光固化齐聚物。用红外光谱、核磁共振氢谱和凝胶渗透色谱对低聚物的化学结构进行了表征。随后，通过低聚物与甲基丙烯酸羟乙酯稀释剂的共光聚合，制备了一系列紫外光固化涂料。研究了紫外光固化行为、生物基含量和最终性能，如热性能、机械性能和涂层性能。此外，在锌催化剂的存在下，动态酯交换反应在高温下被激活，从而进一步研究了自愈合、形状记忆、延展性和可回收性能。值得注意的是，所获得的紫外光固化涂层具有良好的自愈性能(在200℃下30分钟的自愈率为86-100%)、高的生物基含量(45.4-72.3%)和高性能(拉伸强度和玻璃化转变温度分别高达22.4兆帕和119.2℃)。
Development of self-healing UV-curable coatings from biorenewable resources is of great significance for sustainable development and environmental protection. In this work, a biobased UV-curable oligomer was firstly synthesized by ring-opening reaction of epoxidized rubber seed oil with glycidyl methacrylate-modified itaconic acid precursor. Chemical structure of the obtained oligomer was then characterized by FT-IR, 1H NMR, and gel permeation chromatography. Subsequently, a series of UV-curable coatings were prepared by cophotopolymerization of the oligomer with the hydroxyethyl methacrylate diluent. UV-curing behaviors, biobased contents, and ultimate properties such as thermal, mechanical, and coating properties were studied. Furthermore, dynamic transesterification reactions were activated at elevated temperatures in the presence of a Zinc catalyst, thus self-healing, shape memory, malleable, and recyclable properties were further investigated. Notably, the obtained UV-curable coatings demonstrated good self-healing properties (86-100% at 200 degrees C for 30 min), high biobased contents (45.4-72.3%), and high performance (tensile strength and glass transition temperature up to 22.4 MPa and 119.2 degrees C, respectively).