Structure and conformation of polyetheramine in confined space of graphene oxide and its enhancement on the electrically conductive properties of monomer casting nylon-6
Structure and conformation of polyetheramine in confined space of graphene oxide and its enhancement on the electrically conductive properties of monomer casting nylon-6
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DOI：
10.1016/j.compositesa.2016.12.025
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发表时间：
2017-04
影响因子：
8.7
通讯作者：
Meng Xiang;Chengjie Li;L. Ye
中科院分区：
文献类型：
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作者：
Meng Xiang;Chengjie Li;L. Ye
用聚乙醇胺(PEA)对氧化石墨烯(GO)进行官能化处理，原位合成了MC尼龙6/还原GO-PEA复合材料。GO/PEA分子间形成了共价键和氢键，接枝率和平均层厚随PEA负载量的增加而显著增加。同时，GO-PEA的层间距(D002)逐渐增大，PEA链在100-400%PEA范围内呈平面状和横断状排列，单层、双层排列，而700%PEA饱和插层形成了GO的完全剥离状态。与GO相比，GO-PEA的层叠作用大大减弱，呈现出皱折的几乎单层分散状态，这使得GO(RGO)-PEA在熔融的己内酰胺中有较好的分散，尼龙-6复合材料的均匀度也大大提高。导电网络的形成，使复合材料的导电性显著提高。
Graphene oxide (GO) was functionalized with polyetheramine (PEA) and MC nylon-6/reduced GO (rGO)-PEA composites were in situ synthesized. Intermolecular covalent and hydrogen bonding was confirmed to form for GO/PEA molecules, and the grafting ratio and average layer thickness exhibit a significant increase with PEA loading. Meanwhile the interlayer spacing (d002) of GO-PEA increases steadily, and PEA chains adopt trans and planar zigzag conformation with arrangements of monolayer, bilayer in GO layers in the range of 100–400% PEA, while the completely exfoliated state of GO formed by saturation intercalation of 700% PEA. Compared with GO, the layer stacking of GO-PEA is much more weakened, exhibiting a wrinkled and almost monolayer dispersion state, which leads to a good dispersion of GO (rGO)-PEA in melting caprolactam and a much higher uniformity for the nylon-6 composites. The electrically conductive network formed, resulting in the remarkably improved electrical conductivity of the composites.