基于亚油酸的快干型涂层制备及性能研究

发布时间：2018-06-30 05:34

  本文选题：亚油酸 + 支化　； 参考：《合肥工业大学》2016年硕士论文

【摘要】：可再生类植物基资源由于其环保性、可再生性、廉价性等特点,在替代石化类资源上已经是大势所趋。传统的涂层领域存在着高度依赖石化类资源和固化速度不够快这两大缺陷。为了解决这两大缺陷,本文从可再生类植物基资源出发,选取从农业副产物中提取的亚油酸为原料,通过一系列反应,制备了以亚油酸为基础的快干型改性亚油酯低聚物,同时将该低聚物制备成涂层。该结果不仅可以达到对农业副产物的高效利用,在一定程度上取代石化类资源,同时所制备的涂层可以在紫外光照射下快速固化,有效提升了涂层的固化速率与应用范围。主要的研究内容如下：采用三步反应,首先利用甲基丙烯酸缩水甘油酯(以下简称GMA)分子上的环氧基团与亚油酸分子上的羧基基团进行环氧开环酯化反应,将含有双键的丙烯酸酯成功连接到亚油酸长链分子中,制备亚油基丙烯酸酯。再利用马来酸酐(以下简称MAH)进行支化反应,然后再与GMA进行环氧开环酯化反应,最终成功制备出具有支化结构的多不饱和度改性亚油酯。研究了三步反应的最佳合成工艺,其中环氧开环酯化反应的最佳合成工艺为反应温度130℃,反应时间3h,投料摩尔比1.2(GMA过量)。MAH支化反应的最佳合成工艺为反应温度85℃,反应时间3h,投料摩尔比为1：1。通过红外分析、核磁分析等手段,对所合成的改性亚油酯的分子结构进行了表征,结果表明合成产物具有期望的结构,具有支化结构的多不饱和度改性亚油酯目标产物已经成功合成。在改性亚油酯制备涂层紫外光固化阶段,研究了固化方案与对固化后涂层性能的影响,结果表明最佳固化方案为紫外光照射距离20cm,涂层的厚度200μm。同时分别研究了光引发剂和活性稀释剂种类及用量对涂层的影响,确定了固化涂层的最佳光引发剂种类为BASF Irgacure 907,光引发剂最佳用量为6wt%。最佳活性稀释剂种类为TMPTA,活性稀释剂最佳用量为40wt%。固化涂层的最佳配方为：改性亚油酯：活性稀释剂(TMPTA):光引发剂(907)=54wt%:40wt%:6wt%。研究结果表明,通过最佳方案所制备的改性亚油酯涂层具有较快的固化速率,在紫外光照射下7s即可实现表面干燥,涂层的双键转化率达到了93%,同时所制备的涂层具有较好的性能：附着力为1级,铅笔硬度为3H,冲击强度为40kg·cm,具有优良的耐水性及耐溶剂性。
[Abstract]:Because of its characteristics of environmental protection, reproducibility and low cost, renewable plant-based resources have become the general trend in replacing petrochemical resources. There are two defects in the traditional coating field, which are highly dependent on petrochemical resources and insufficient curing speed. In order to solve these two defects, in this paper, linoleic acid extracted from agricultural by-products was selected as raw material from renewable plant-based resources. Through a series of reactions, a fast drying modified linoleic ester oligomer based on linoleic acid was prepared. At the same time, the oligomer was prepared into a coating. The results can not only achieve high efficiency utilization of agricultural by-products and replace petrochemical resources to a certain extent, but also can rapidly solidify the coatings under UV irradiation, thus effectively increasing the curing rate and application range of the coatings. The main research contents are as follows: firstly, the epoxide group of glycidyl methacrylate (GMA) molecule and the carboxyl group of linoleic acid molecule were used for the epoxidation of glycidyl methacrylate (GMA). Acrylates containing double bonds were successfully linked to linoleic acid long chain molecules to prepare sub-oleic acrylates. Maleic anhydride (MAH) was used for branching reaction, and then epoxy ring opening esterification reaction with GMA was carried out. Finally, the modified oil ester with branched structure was successfully prepared. The optimum synthesis process of the three-step reaction was studied. The optimum synthetic process of epoxide ring-opening esterification was 130 鈩，

本文编号：2085135