摘要
采用原位聚合法，以脲醛树脂和密胺树脂预聚体为壳材、双环戊二烯（DCPD）为芯材，制备了两种DCPD微胶囊。通过扫描电子显微镜、傅里叶变换红外光谱（（FTIR）对微胶囊进行了表征，并将其添加到环氧树脂（EP）中测试复合材料的力学性能。结果表明，脲醛树脂包覆DCPD微胶囊呈球形，粒径为40～80μm，壁厚为1～2μm；密胺树脂包覆DCPD微胶囊颗粒分布不规则，粒径为15～20μm，壁厚为2～5μm。两种微胶囊的FTIR谱图除了具有壳材料脲醛树脂和密胺树脂的特征峰外，在1251，3051cm。处均有芯材DCPD的特征峰，证明DCPD芯材已被两种壳材料成功包覆。随着微胶囊用量的增加，EP／微胶囊复合材料的拉伸强度和冲击强度均呈先增大后减小的趋势，拉伸强度和冲击强度分别在微胶囊质量分数分别为15％和10％时达到最大值，在相同条件下，加入密胺树脂包覆DCPD的复合材料的力学性能明显好于加入脲醛树脂包覆DCPD微胶囊的复合材料。
Two dicyclopentadiene（DCPD） microcapsules were prepared with the shell material of urea-formaldehyde resin or melamine resin and the core material of DCPD by in-situ polymerization. The microcapsules were characterized by scanning electron microscopy and fourier transform infrared spectroscopy（FTIR）, the microcapsules were adding into epoxy resin and the mechanical properties were tested. Results show that urea-formaldehyde resin cladding DCPD mierocapsules are spherical, particle size is 40 - 80 μ m, wall thickness is 1 - 2 μm. Melamine resin cladding DCPD microcapsules disperse irregularly, particle size is 15 - 20 μ m, wall thickness is 2 - 5 μ m. FTIR spectrum of two microcapsules show the characteristic peak of urea-formaldehyde resin and melamine resin are existed and the characteristic peaks in 1 251 cm-1, 3 051 cm-1 are existed also, which prove the core DCPD cladding with two target shell materials successfully. With an increase of microcapsules content, the tensile strength and impact strength of epoxy resin/microcapsules composites increase firstly and then decrease, the maximum values of tensile strength and impact strength reach when the mass fraction of microcapsules is 15% and 10% respectively, under the same conditions, the mechanical properties of epoxy resin/melamine resin cladding DCPD microcapsules composite are better than epoxy resin/ureaformaldehyde resin cladding DCPD microcapsules composite evidently.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2014年第1期112-115,共4页
Engineering Plastics Application
基金
辽宁工程技术大学博士启动基金项目(11-118
11-158)
关键词
自修复
微胶囊
环氧树脂
力学性能
self-healing
microcapsule
epoxy resin
mechanical property
