Chammingkwan Patchanee, Matsushita Katsuhiko, Taniike Toshiaki, Terano Minoru
Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan.
Materials (Basel). 2016 Mar 29;9(4):240. doi: 10.3390/ma9040240.
Terminally hydroxylated polypropylene (PP) synthesized by a chain transfer method was grafted to graphene oxide (GO) at the chain end. Thus obtained PP-modified GO (PP-GO) was melt mixed with PP without the use of a compatibilizer to prepare PP/GO nanocomposites. Mechanical and electrical properties of the resultant nanocomposites and reference samples that contained graphite nanoplatelets, partially reduced GO, or fully reduced GO were examined. The best improvement in the tensile strength was obtained using PP-GO at 1.0 wt %. The inclusion of PP-GO also led to the highest electrical conductivity, in spite of the incomplete reduction. These observations pointed out that terminally hydroxylated PP covalently grafted to GO prevented GO layers from re-stacking and agglomeration during melt mixing, affording improved dispersion as well as stronger interfacial bonding between the matrix and GO.
通过链转移法合成的端羟基化聚丙烯（PP）在链端接枝到氧化石墨烯（GO）上。将由此获得的PP改性GO（PP-GO）与PP在不使用增容剂的情况下进行熔融共混，以制备PP/GO纳米复合材料。研究了所得纳米复合材料以及含有石墨纳米片、部分还原的GO或完全还原的GO的参比样品的力学和电学性能。使用1.0 wt%的PP-GO时，拉伸强度得到了最佳改善。尽管还原不完全，但PP-GO的加入也导致了最高的电导率。这些观察结果表明，共价接枝到GO上的端羟基化PP在熔融共混过程中防止了GO层的重新堆叠和团聚，从而改善了分散性，并增强了基体与GO之间的界面结合。
