原位聚合法制备石墨烯/聚酰亚胺复合材料及其性能
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摘要
以石墨烯(GNS)为改性填料,采用原位聚合法制备了GNS/聚酰亚胺(GNS/PI)复合材料,对有关产物的形貌和结构进行了表征。研究了GNS添加量对复合材料力学、电学和热学性能的影响。结果表明:GNS为较薄的片层状,表面较光滑,褶皱较少,有含氧基团残留;当GNS质量分数为1.5%时,复合材料力学性能达到最佳,其拉伸强度达126.7MPa,断裂伸长率达3.4%,邵氏硬度达89.7,摩擦系数和磨损率分别比纯PI降低了50.0%和70.6%;当GNS质量分数为1.0%时,复合材料电导率比纯PI提高了6个数量级;当GNS质量分数为2.0%时,复合材料热起始分解温度达559.2℃,比纯PI提高11.4℃。
The graphene(GNS)/polyimide(PI)composite was prepared through in-situ polymerization.The morphology and structure of products were characterized.The influence of graphene dosage on the mechanical,thermal and electrical properties were studied.The results showed that,GNS was thin layer,flaky and less fold,containing residual oxygen-containing groups.The mechanical property of composite was best when the mass fraction of GNS was1.5%(the tensile strength was 126.7 MPa,breaking elongation was 3.4%,shore hardness was 89.7,friction factor and wear rate were 50.0%and 70.6%lower than pure PI respectively).The conductivity of composite was six order of magnitude higher than PI when the mass fraction of GNS was 1.0%.The initial decomposition temperature was559.2℃,11.4℃ high than pure PI when mass fraction of GNS was 2.0%.
The graphene(GNS)/polyimide(PI)composite was prepared through in-situ polymerization.The morphology and structure of products were characterized.The influence of graphene dosage on the mechanical,thermal and electrical properties were studied.The results showed that,GNS was thin layer,flaky and less fold,containing residual oxygen-containing groups.The mechanical property of composite was best when the mass fraction of GNS was1.5%(the tensile strength was 126.7 MPa,breaking elongation was 3.4%,shore hardness was 89.7,friction factor and wear rate were 50.0%and 70.6%lower than pure PI respectively).The conductivity of composite was six order of magnitude higher than PI when the mass fraction of GNS was 1.0%.The initial decomposition temperature was559.2℃,11.4℃ high than pure PI when mass fraction of GNS was 2.0%.
引文
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[22]王亚平,李英芝,张清华.石墨烯/聚酰亚胺复合材料的制备与性能[J].高分子材料科学与工程,2013,29(12):144-147.
[2]何维娟,邱祖民,郑楠.无机填料改性及其在高分子材料中的应用[J].化工新型材料,2015,43(8):28-30.
[3]朱振峰,程莎,董晓楠.石墨烯的制备和应用[J].功能材料,2013,44(21):3060-3071.
[4]Novoselov K S,Geim A K,Morozov S V,et al.Two dimensional gas of massless dirac fermions in graphene[J].Nature,2005,438(7065):197-200.
[5]Stoller M D,Park S J,Zhu Y W,et al.Graphene-based ultracapacitors[J].Nano Letters,2008,8(10):3498-3502.
[6]Gomez-Navarro C,Burghard M,Kern K.Elastic properties of chemically derived single graphene sheets[J].Nano Letters,2008,8(7):2045-2049.
[7]Balandin A A,Ghosh S,Bao W Z,et al.Superior thermal conductivity of single-layer graphene[J].Nano Lett,2008,8(3):902-907.
[8]Zhang J,Wang J F,Lin T,et al.Magnetic and mechanical properties of polyninyl alcohol nanocomposites with hybrid nanofillers-graphene oxide tethered with magnetic Fe3O4nanoparticles[J].J Chem Engin,2014,237(1):462-468.
[9]Yadav S K,Cho J W.Functionalized graphene nanoplatelets for enhanced mechanical and thermalproperties of polyurethane nanocomposites[J].Applied Surface Sciene,2013,266:360-367.
[10]甄卫军,王文涛,李进.聚乳酸/氧化石墨烯纳米复合材料的结构与性能[J].高分子材料科学与工程,2015,31(4):152-157.
[11]Gudarzi M M,Sharif F.Self assembly of graphene oxide at the liquid-liquid interface:a new route to the fabrication of graphene based composites[J].Soft Matter,2011,7:3432-3440.
[12]赵鹏飞,罗勇悦,何东宁.乳液模板自组装法制备石墨烯/聚苯乙烯导电复合材料[J].功能材料,2013,44(19):2888-2891.
[13]刘欣,管永,邵晓瑜,等.氧化石墨烯/三元共聚尼龙纳米复合材料的制备与性能[J].高分子材料科学与工程,2015,31(10):165-174.
[14]Fernndez-Merino M J,Guardia L,Paredes J I,et al.Vitamin C is an ideal substitute for hydrazine in the reduction of graphene oxide suspensions[J].Journal of Physical Chemistry C,2010,114(14):6426-6432.
[15]宋洪松,杨程,刘大博.石墨烯/环氧树脂复合材料的介电性能研究[J].功能材料,2012,43(9):1185-1188.
[16]王鸣玉,王亚,李衡峰.石墨烯/聚酰亚胺介电复合材料的制备与性能[J].粉末冶金材料科学与工程,2017,22(1):62-69.
[17]王明,张盼盼,白晓玉.聚氯乙烯/氧化石墨烯薄膜的力学性能和热稳定性能[J].材料研究学报,2012,26(4):390-395.
[18]谢卫刚,赵东林,景磊,等.石墨烯/环氧树脂复合材料的制备与力学性能[J].高分子材料科学与工程,2012,28(9):129-132.
[19]Zaman I,Phan T T,Kuan H C,et al.Epoxy/graphene platelets nanocomposites with two levels of interface strength[J].Polymer,2011,52(7):1603-1611.
[20]黄伟九,赵远,王选伦.石墨烯/聚酰亚胺复合材料的力学和摩擦学性能[J].功能材料,2012,43(24):3484-3488.
[21]马朗,王国建,戴进峰.原位聚合法与溶液混合法制备石墨烯/聚酰亚胺复合材料及其性能[J].新型炭材料,2016,31(2):130-134.
[22]王亚平,李英芝,张清华.石墨烯/聚酰亚胺复合材料的制备与性能[J].高分子材料科学与工程,2013,29(12):144-147.