用于自修复复合材料的环氧树脂微胶囊化乙二胺的制备与表征

Preparation and Characterization of Microencapsulated Ethylenediamine with Epoxy Resin for Self-healing Composites.

作者信息

Yuan Liye, Sun Tongqing, Hu Honglin, Yuan Shuxia, Yang Yu, Wang Rongguo, Lyu Chunxiang, Yang Fan, Lyu Xiaoxuan

机构信息

Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, People's Republic of China.

National Engineering Laboratory for Carbon Fiber Technology, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, People's Republic of China.

出版信息

Sci Rep. 2019 Dec 11;9(1):18834. doi: 10.1038/s41598-019-55268-7.

DOI:10.1038/s41598-019-55268-7

PMID:31827173

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6906396/

Abstract

Healing agent microcapsules have been used to realize self-healing for polymeric composites. In this work a novel kind of microcapsules encapsulating ethylenediamine (EDA) with epoxy resin as shell material were prepared by interfacial polymerization technology. The oil phase was epoxy resin prepolymer and carbon tetrachloride, and the water phase was EDA and deionized water. Under the action of emulsifier, a stable water-in-oil emulsion was formed. Then the emulsion was added to dimethyl silicone oil, stirred and dispersed, to prepare microcapsules. In addition, the factors affecting the preparation of microcapsules were studied. In this study, Fourier transform infrared(FTIR) was carried out to demonstrate the chemical structure of ethylenediamine microcapsules. Optical microscope(OM) and scanning electron microscope(SEM) were used to observe the morphology of microcapsules. Thermogravimetric analysis and differential scanning calorimetry were done to investigate the thermal properties of microcapsules. Permeability experiment and isothermal aging test were executed to verify the environment resistance of microcapsules. Results showed that EDA was successfully coated in epoxy resin and the microcapsule size was in the range of 50~630 μm. The synthesized microcapsules were thermally stable below 75 °C and perfect permeability resistance to ethanol solvent.

摘要

愈合剂微胶囊已被用于实现聚合物复合材料的自愈合。在这项工作中，通过界面聚合技术制备了一种新型的以环氧树脂为壳材包裹乙二胺（EDA）的微胶囊。油相为环氧树脂预聚物和四氯化碳，水相为乙二胺和去离子水。在乳化剂的作用下，形成了稳定的水包油乳液。然后将该乳液加入到二甲基硅油中，搅拌并分散，以制备微胶囊。此外，还研究了影响微胶囊制备的因素。在本研究中，进行了傅里叶变换红外光谱（FTIR）以表征乙二胺微胶囊的化学结构。使用光学显微镜（OM）和扫描电子显微镜（SEM）观察微胶囊的形态。进行了热重分析和差示扫描量热法以研究微胶囊的热性能。进行了渗透性实验和等温老化试验以验证微胶囊的耐环境性。结果表明，乙二胺成功地被包覆在环氧树脂中，微胶囊尺寸在50~630μm范围内。合成的微胶囊在75°C以下具有热稳定性，并且对乙醇溶剂具有良好的抗渗透性。