聚苯胺共轭接枝氧化石墨烯的制备及性能测试
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摘要
利用改进Hummers法氧化鳞片石墨,然后超声分离制备氧化石墨烯(GO),最后利用表面的环氧基与氨水在压力釜中反应引入氨基(GO-g),进而接枝聚苯胺,制备聚苯胺共轭接枝氧化石墨烯(GO-g-PANI)。通过FT-IR、SEM、TEM、XRD、四探针导体/半导体电阻率测试仪进行表征。结果表明,成功制备了聚苯胺共轭接枝氧化石墨烯,当氨基化石墨烯与苯胺的质量比为1∶3,氨基化温度为85℃时,制备得到的聚苯胺共轭接枝氧化石墨烯导电性最好,电阻率值为3.35Ω·cm,在导电材料、电磁屏蔽材料方面具有潜在的应用前景。
Graphene oxide(GO)was prepared by firstly the oxidation of flake graphite using modified Hummers method,and then separation under ultrasonic system.Reacting the epoxy on the surface with ammonia to introduce aniline groups(GO-g),and polyaniline modified graphene oxide(GO-g-PANI)was prepared by conjugate grafting polyaniline onto the surface of graphene.The products were characterized by FT-IR,SEM,TEM,XRD,and resistivity tester.The results showed that GO-g-PANI was successfully prepared.When the weight ratio of amino graphene to aniline is 1∶3 and aminating reaction temperature is 85 ℃,GO-g-PANI with the best conductivity is achieved,whose resistivity value is 3.35Ω·cm.This material has potential applications in conductive materials and electromagnetic shielding materials.
Graphene oxide(GO)was prepared by firstly the oxidation of flake graphite using modified Hummers method,and then separation under ultrasonic system.Reacting the epoxy on the surface with ammonia to introduce aniline groups(GO-g),and polyaniline modified graphene oxide(GO-g-PANI)was prepared by conjugate grafting polyaniline onto the surface of graphene.The products were characterized by FT-IR,SEM,TEM,XRD,and resistivity tester.The results showed that GO-g-PANI was successfully prepared.When the weight ratio of amino graphene to aniline is 1∶3 and aminating reaction temperature is 85 ℃,GO-g-PANI with the best conductivity is achieved,whose resistivity value is 3.35Ω·cm.This material has potential applications in conductive materials and electromagnetic shielding materials.
引文
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[2]Cho W B,Kim J W,Lee H W,et al.High-quality,large-area monolayer graphene for efficient bulk laser mode-locking near 1.25μm[J].Opt Lett,2011,36(20):4089-4091.
[3]Lee C,Wei X,Kysar J W,et al.Measurement of the elastic properties and intrinsic strength of monolayer graphene[J].Science,2008,321(5887):385-388.
[4]Sathiyanarayanan S,Karpakam V,Kamaraj K,et al.Sulphonate doped polyaniline containing coatings for corrosion protection of iron[J].Surface and Coatings Technology,2010,204(9):1426-1431.
[5]Chen Guo,Zheng Jifeng,Lv Qiufeng.Preparation and characterization of cross-linked polyvinyl alcohol bearing styrylpyridinium group/bacterial cellulose gels[J].Polymer Materials Science&Engineering,2010,31(10):175-179(in Chinese).陈果,郑积烽,吕秋丰.染料修饰氧化石墨烯/聚苯胺复合物的制备及性能[J].高分子材料科学与工程,2010,31(10):175-179.
[6]Kumar N A,Choi H J,Shin Y R,et al.Polyaniline-grafted reduced graphene oxide for efficient electrochemical supercapacitors[J].Acs Nano,2012,6(2):1715-23.
[7]Gao Z Y,Wang F,Chang J L,et al.Chemically grafted graphene-polyaniline composite for application in supercapacitor[J].Electrochimica Acta,2014,133(7):325-334.
[8]Marcano D C,Kosynkin D V,Berlin J M,et al.Improved synthesis of graphene oxide[J].ACS Nano,2010,4(8):4806-4814.
[9]Yang Hui,Zhao Xiaojuan,Zhao Jianguo.Preparation and structural characterization of graphene oxide by pressurized oxidation[J].Journal of Shanxi Datong University:Natural Science Edition,2014(6):39-42(in Chinese).杨辉,赵小娟,赵建国.氧化石墨烯制备及其结构表征[J].山西大同大学学报:自然科学版,2014(6):39-42.
[10]Pouget J P,Jozefowicz M E,Epstein A J,et al.X-ray structure of polyaniline[J].Macromolecules,1991,24(3):779-789.
[11]Wang Q,Yan J,Fan Z,et al.Mesoporous polyaniline film on ultra-thin graphene sheets for high performance supercapacitors[J].Journal of Power Sources,2014,247(2):197-203.
[12]Gao Z,Wang F,Chang J,et al.Chemically grafted graphene-polyaniline composite for application in supercapacitor[J].Electrochimica Acta,2014,133(7):325-334.