石墨烯导电粉末涂料的制备与研究
|
摘要
将石墨烯邦定至粉末底粉的表面,在固化过程中,石墨烯可迁移至涂层表层,成膜后制备导电型石墨烯粉末涂料(邦定法)。作为对比,将石墨烯通过挤出机混炼后,完全分散在涂层中,制备导电型石墨烯粉末涂料(内挤法)。结果发现:石墨烯用量同样为0. 3%时,内挤法涂层表面电阻为10~(12)Ω,而邦定法可降低至10~6Ω。邦定技术可大大降低石墨烯的用量,降低成本。采用红外光谱对粉末涂料的化学结构进行表征,通过差示扫描量热仪(DSC)测定其固化过程,并探讨了石墨烯的添加量对涂层表面电阻的影响。
Conductive powder coating could be prepared by bonding base powder with graphene which migrates to top layer of coating surface during curing process. By comparison,graphene is also co-extruded with the coating composition. The results indicate that the same content of graphene 0. 3% can enable the surface resistance of the coating via extruding process to be 10~(12)Ω while the surface resistance of the coating via bonding process is 10~6Ω,indicating that the bonding process can significantly reduce the amount of graphene used in the formulation,which significantly results in cost reduction. Chemical structure is studied by FTIR and the curing process is monitored by DSC. In addition,the influence of graphene content on electrical resistance of the film is also studied.
Conductive powder coating could be prepared by bonding base powder with graphene which migrates to top layer of coating surface during curing process. By comparison,graphene is also co-extruded with the coating composition. The results indicate that the same content of graphene 0. 3% can enable the surface resistance of the coating via extruding process to be 10~(12)Ω while the surface resistance of the coating via bonding process is 10~6Ω,indicating that the bonding process can significantly reduce the amount of graphene used in the formulation,which significantly results in cost reduction. Chemical structure is studied by FTIR and the curing process is monitored by DSC. In addition,the influence of graphene content on electrical resistance of the film is also studied.
引文
[1]连宁,范顺宝.电磁屏蔽导电涂料的研究[J].电子机械工程,1995(5):26-30.
[2] YU G,GAO J,HUMMELEN J C,et al. Polymer photovoltiac cells:Enhanced efficiencies via a network of internal donor-acceptor heterojunctions[J]. Science,1995,270(5243):1789-1791.
[3]许均,曾幸荣.导电涂料开发现状及新方法探讨[J].合成材料老化与应用,2003,32(4):40-45.
[4]韩松,黄鹏波,程宏凯.炭黑石墨填充复合导电涂料的制备研究[J].中国涂料,2007,22(1):31-32.
[5]翁建新,吴大军,陈国华.环氧树脂/石墨微片复合导电材料的导电性[J].华侨大学学报:自然科学版,2004,25(4):379-382.
[6]张洪艳,王海泉,陈国华.新型导电填料—纳米石墨微片[J].塑料,2006,35(4):42-45.
[7]赖奇,罗学萍.石墨烯导电涂膜的制备研究[J].非金属矿,2014,37(3):28-29.
[8]胥会,陈建,熊壮,等.石墨烯复合导电涂料的制备[J].炭素技术,2015,34(3):23-26.
[9] AHARONI S M. Electrical resistivity of a composite of conducting particles in an insulating matrix[J]. Journal of Applied Physics,1972,43(5):2463-2465.
[10] SCHEER E,JOYEZ P,ESTEVE D,et al. Conduction channel transmissions of atomic-size aluminum contacts[J].Physical Review Letters,1997,78(18):3535-3538.
[11] BULGIN D. Electrically conductive rubber[J]. Rubber Chemistry and Technology,1946,19(3):667-695.
[2] YU G,GAO J,HUMMELEN J C,et al. Polymer photovoltiac cells:Enhanced efficiencies via a network of internal donor-acceptor heterojunctions[J]. Science,1995,270(5243):1789-1791.
[3]许均,曾幸荣.导电涂料开发现状及新方法探讨[J].合成材料老化与应用,2003,32(4):40-45.
[4]韩松,黄鹏波,程宏凯.炭黑石墨填充复合导电涂料的制备研究[J].中国涂料,2007,22(1):31-32.
[5]翁建新,吴大军,陈国华.环氧树脂/石墨微片复合导电材料的导电性[J].华侨大学学报:自然科学版,2004,25(4):379-382.
[6]张洪艳,王海泉,陈国华.新型导电填料—纳米石墨微片[J].塑料,2006,35(4):42-45.
[7]赖奇,罗学萍.石墨烯导电涂膜的制备研究[J].非金属矿,2014,37(3):28-29.
[8]胥会,陈建,熊壮,等.石墨烯复合导电涂料的制备[J].炭素技术,2015,34(3):23-26.
[9] AHARONI S M. Electrical resistivity of a composite of conducting particles in an insulating matrix[J]. Journal of Applied Physics,1972,43(5):2463-2465.
[10] SCHEER E,JOYEZ P,ESTEVE D,et al. Conduction channel transmissions of atomic-size aluminum contacts[J].Physical Review Letters,1997,78(18):3535-3538.
[11] BULGIN D. Electrically conductive rubber[J]. Rubber Chemistry and Technology,1946,19(3):667-695.