Research Progress in Toughening Epoxy Resin Matrix by Insitu Technique
WEI Bo1, ZHOU Jintang1,2,3, YAO Zhengjun1,2,3, QIAN Yi1, QIAN Kun1
1 College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106; 2 Key Laboratory of Materials Preparation and Protection for Harsh Environment, Ministry of Industry and Information Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106; 3 Jiangsu Key Laboratory of Advanced Metallic Materials, Nanjing 211189
Abstract: ince the invention of epoxy resin in the early 20th century, due to its great properties in adhesion, machinability and chemical resistance, the epoxy resin is widely used in coating, packaging, electronic products manufacturing and other industries. In recent years, people use epoxy resin as infiltration matrix in the aerospace, arms equipment and many other national frontier technology areas and has achieved lots of research production. When people use different new resin moulding transfer techniques to prepare and process composites with epoxy resin matrix, it is easy to make the final products have some advantages like small shrinkage, uniform integrity and excellent corrosion resistance, and make the materials meet requirements for electrical and mechanical properties at the same time. Up to now, epoxy resin is still in dominant position in aviation industry.
In order to promote the application of aviation industry, countries around the world have put forward higher requirements for epoxy resin, and the related advanced composite material preparation technology has been constantly enriched and improved. Epoxy resin forms a threedimensional network structure in curing process. In one hand, it improves the physical strength and hardness of the materials significantly. In the other hand, high crosslinking density also makes materials brittle and easy to crack. Therefore, it has always been the focus of research in the field of aeronautical composites about how to improve toughness of epoxy resin. Researchers have made great achievements after attempting in toughening epoxy resin for many years. Various toughening schemes and mechanisms have been established successively, which expands the application of epoxy resin greatly.
Most of the mature schemes for toughening epoxy resin belong to the category of insitu toughening at present. A new phase can be formed by adding reinforcing phase into the epoxy resin polyphase system, the uniform spatial distribution of different phases in the infiltrating matrix will improves toughness as the result. Some of the most effective toughening schemes are: (i) toughening epoxy resin by adding rubber particles, thermotropic liquid crystal polymer, hyperbranched polymer, coreshell polymer and so on; (ii) preparing a interpenetrating/semiinterpenetrating polymer networks with epoxy resin and another phase to toughen through predesign; (iii) adding nanoparticles with special functions to toughen epoxy resin matrix. The research on toughening modification of epoxy resin has important theoretical significance and practical value in general.
In this paper, the development of epoxy resin was briefly reviewed through two aspects: the mature macroscopic system and the rapid development of nanomodifiers in recent 30 years. Some insitu toughening technologies with great effect were described in detail, and enumerate the important results published in recent years to support. The paper also evaluated the advantages and disadvantages of different technologies objectively. At the end of this paper, the problems faced by the toughening technology of epoxy resin and the future development direction are analyzed to provide reference for the preparation of light and high performance epoxy resin composites.
作者简介: 魏波，2017年于南通大学取得高分子材料与工程学士学位，现于南京航空航天大学化学专业攻读硕士学位。研究方向为航天复合材料的制备与吸波材料的研究，已在《广州化学》发表论文一篇。 周金堂，南京航空航天大学材料技术与科学学院副教授、硕士研究生导师。2014年于南京航空航天大学获材料加工工程专业博士学位，主要从事结构/功能一体化复合材料的研究工作。获授权发明专利20余项，近年来在树脂基复合材料、泡沫复合材料等领域发表SCI论文30余篇，EI论文10余篇，包括Applied Surface Science、Materials Letters、Journal of Applied Polymer Science、Polymer Composites、Materials Science and Engineering和Journal of Materials Chemistry C等。 姚正军，南京航空航天大学材料科学与技术学院院长、教授、博士研究生导师，中国工程院重点咨询研究项目组专家；江苏省复合材料学会常务理事；江苏省金属学会副理事长；江苏省金属学会新金属材料学术委员会主任；江苏省热处理及表面改性工程技术研究中心副主任；江苏省高性能合金产业技术创新战略联盟技术专家；江苏省机械工程学会材料工程专业委员会副理事长。主要从事新型金属材料及表面工程和高分子复合材料的研究工作，以第一或通讯作者身份在Journal of Alloys and Compounds、Sensors and Actuators B: Chemical、Materials Letters、Polymer Composites、Journal of Materials Science: Materials in Electronics等SCI期刊上发表论文60余篇，已出版教材2部，获省部级各类奖项6项，获国家授权发明专利20余项。
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