表面修饰氧化石墨烯纳米带增强PMMA的研究

Reinforcement of poly( methyl methacrylate) with surface-modified graphene oxide nanoribbon

以多壁碳纳米管(MWNTs)为原料,使用纵向氧化切割法制备了氧化石墨烯纳米带(GONR),通过物理吸附作用制备了聚醚型苯并咪唑(OPBI)非共价修饰GONR(FGONR)。采用溶液浇注法制得了聚丙烯酸甲酯(PMMA)/FGONR复合材料薄膜,对FGONR及其PMMA复合材料的结构与性能进行了研究,同时对比了以MWNTs,GONR,OPBI改性MWNTs(FCNTs)增强的PMMA复合材料的力学性能。结果表明:OPBI成功地物理吸附到GONR的表面,且FGONR在PMMA中具有良好的分散性能;在PMMA/FGONR复合材料中,当FGONR的质量分数为0.5%时,复合材料的拉伸强度达到49.50 MPa,杨氏模量达到2.27 GPa,其增强效果比MWNTs,GONR,FCNTs的要好,FGONR有望作为制备高性能复合材料的一种良好的纳米填料。

Graphene oxide nanoribbon （GONR） was successfully prepared by oxidative unzipping of multi-walled carbon nanotubes （MWNTs）.And poly [2,2＇-（p-oxydiphenylene）-5,5 ＇-bibenzimidazole] （OPBI） was successfully introduced onto GONR via physical absorption to obtain OPBI non-covalent modified GONR （FGONR）.Poly（methyl methacrylate） （PMMA）/FGONR composite film was prepared by solution casting.The structure and properties of FGONR and PMMA/FGONR composites were studied and compared with those of MWNTs,GONR and OPBI-modified MWNTs （FCNTs） reinforced PMMA composites.The results showed that OPBI was successfully adsorbed on the surface of GONR,and FGONR was well dispersed in PMMA matrix.PMMA/FGONR composite had the tensile strength and Young＇s modulus of 49.50 MPa and 2.27 GPa,respectively,when the content of FGONR was 0.5% by mass fraction.FGONR was expected to be used as a satisfied nano-filler for producing high-performance composite due to its better reinforcement effect than MWNTs,GONR and FCNTs.