摘要
根据石墨的层状结构 ,以可膨胀石墨 (KP)或膨胀石墨 (EP)为模板 ,应用原位聚合法成功制备了聚苯胺 (PANi) /石墨导电复合材料。通过 FT- IR、XRD、SEM和电导率测量等手段表征了其结构和性能。结果表明 ,PANi/EP的电导率与单一组分相比 ,都有大幅度提高 ,而 PANi/KP的电导率介于两组分之间 ,PANi/EP的电导率高于 PANi/KP复合材料 4～ 5倍。XRD证明 ,膨胀石墨与聚苯胺复合大大提高了聚苯胺的结晶度 ,改善了聚苯胺的结构缺陷。FT- IR表明聚苯胺的特征吸收峰发生了位移 ,表明 KP或 EP的表面官能团与聚苯胺之间发生了氢键或共轭作用。
Polyaniline (PANi)/graphite conducting composites were prepared by in situ polymerization of aniline based on expandable graphite (KP) or expanded graphite (EP) according to their layered structure. Structures and properties of PANi/KP and PANi/EP composites were characterized through FT IR, XRD, SEM and measurement of the electrical conductivity. Results show that the electrical conductivity of PANi/EP composites powders greatly increases compared with neat polyaniline or expanded graphite and it of PANi/KP composites varies from neat polyaniline to expandable graphite, then the conductivity of PANi/EP is 4~5 times higher than PANi/KP. XRD proves that the crystallinity of polyaniline in PANi/EP composites greatly increases and crystal structure disfigurements of polyaniline are greatly improved because of coordinated interaction between polyaniline and EP and crystallinity of polyaniline in PANi/KP composites a little decreases. FT IR shows that there are many oxygen containing groups in KP surface and strong hydrogen bond between polyaniline and KP, but a little in between polyaniline and EP.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2002年第5期92-95,共4页
Polymer Materials Science & Engineering
关键词
聚苯胺
石墨
导电复合材料
制备
表征
膨胀石墨
电导率
原位聚合
expanded graphite
polyaniline
polyaniline/graphite composites
electrical conductivity
in situ polymerization
