原位聚合法制备酚醛树脂/氧化石墨烯复合材料

以自制的氧化石墨烯(GO)为改性填料,采用原位聚合法制备了酚醛树脂(PF)/G0复合材料,通过X射线衍射仪、红外光谱、扫描电镜、热重分析及力学性能测试研究了产物结构,GO在PF中的分散以及GO含量对PF/G0复合材料性能的影响。结果表明,GO在PF基体中的分散度可达到微米级,且未与PF发生化学反应。适量引入GO,可有效提高PF的力学性能和热稳定性,当GO的质量分数为1.0%时,PF/GO的冲击强度和弯曲模量达到最大值7.15kJ/m^2和19.57GPa,分别比纯PF提高了14.04%和17.96%,当GO质量分数为1.5%时,PF/G0热稳定性最好,T5%、Tmax和800℃残炭率分别比纯PF提高58.3℃,8.2℃和2%。

Synthesis of phenolic resin/graphene oxide composites by in-situ polymerization

The composites of phenolic resin(PF)/graphene oxide(GO)were prepared by in-situ polymerization using se lfmade GO as modification filler.The structure of product,GO dispersion in PF and the effect of GO content on the properties of PF/GO composites were studied by X-ray diffraction,infrared spectroscopy,scanning electron microscopy,thermogravimetric analysis and mechanical property testings.The results showed that the dispersion of GO in the PF matrix could reach micron lev el,and no reaction occurred between GO and PF.Introducing GO in an appropriate amount could effectively improve the mechanical properties and thermal stability of PF.When the mass fraction of GO was 1.0%,the impact strength and flexural modulus of PF/GO reached the maximum values of 7.15 kJ/m^2 and 19.57 GPa,respectively.It was 14.04%and 17.96%higher than that of pure PF.When the GO mass fraction was 1.5%,the thermal stability of PF/GO was the best.The T5%,T max and char yield at 800℃ of the composites were higher than that of pure PF 58.3 ℃,8.2℃and 2%,respectively.