摘要
采用改进的Hummers法制备氧化石墨烯(GO),通过超声分散与苯酚、甲醛进行原位聚合,将所得原位聚合树脂与其它填料一起通过辊炼、模压成型制备GO/酚醛树脂(PF)原位复合材料。研究GO含量对GO/PF原位复合材料的热性能、力学性能、动态力学性能、蠕变和应力松弛的影响,使用扫描电子显微镜(SEM)观察复合材料的冲击断面形貌。研究结果表明,当GO加入量为1%时,GO/PF原位复合树脂的初始热分解温度比纯酚醛树脂(PF)提高了55.8℃;当GO加入量为0.25%时,GO/PF原位复合材料的冲击强度提高18.6%;当GO加入量为0.5%时,GO/PF原位复合材料的储能模量比纯PF复合材料提高78.3%,Tg提高了8.9℃。SEM观察发现,GO/PF原位复合材料的冲击断面凹凸不平,表明GO的加入能有效提高PF复合材料的力学性能。
Graphene oxide （GO）was synthesized by a modified Hummers method, and GO/PF composites were prepared through in-situ polymerization with phenol formaldehyde （PF） resin. The thermal properties, mechanical properties, dynamic mechanical thermal analysis, creep and stress relaxation behavior of GO/PF in-situ composites with different contents of GO were studied. The impact section of the composites was observed by scanning electron microscope （SEM）. The results show that GO can be well dispersed in the PF matrix, after in-situ polymerization and the addition of GO improves the thermal, mechanical and dynamical mechanical thermal performance. When GO loading contents is 1%, the initial decomposition temperature increases by 55.8 ℃. When GO loading contents is 0.25 %, the impact strength increases by 18.6%. When GO loading contents is 0.5%, the storage modulus of composites increaseds by 78.3 % and glass transition temperature （Tg） rises by 8.9 ℃. The impact section of GO/ PF in-situ composites is irregular, indicating that the mechanical properties of the PF composites can be improved by addition of GO.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2013年第5期79-82,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51163003
51163004)
广西自然科学基金资助项目(2010GXNSFA013030
2012GXNSFBA053153
2012GXNSFBA053155)
广西科技厅项目(11-031-03-08)
关键词
氧化石墨烯
酚醛树脂
原位聚合
复合材料
力学性能
graphene oxide
phenol formaldehyde
in-situ polymerization
composites
mechanical properties
