湖南大学学报（自然科学版）2018，Vol.45Issue(6)：45-50,6.DOI:10.16339／j.cnki.hdxbzkb.2018.06.007
石墨烯/聚氨酯纳米复合材料的制备及力学性能研究*
Study on Preparation and Mechanical Properties of Graphene/Polyurethane Nanocomposites
摘要
Abstract
Graphene oxide(GO)was prepared via improved Hummers method,and then the GO was functionalized with phenyl isocyanate.Subsequently,functionalized GO(iGO)and 4,4′-diphenylmethane diisocyanate(MDI)were mixed under sonication in dimethylformamide(DMF)solvent to obtain a homo-geneous mixture.The mixtures were reacted with polyoxytertramethylene glycol(PTMG)and 1,4-bu-tanediol(BD)in DMF solvent to prepare the iGO/thermoplastic polyurethane(PU)nanocomposites(called GO-TPU),while neat TPU was synthesized under the same conditions for comparison.Character-izations were carried out by XRD,FT-IR,XPS,Raman spectroscopy,SEM and mechanical properties were tested.The results show that the phenyl isocyanate is successfully grafted onto the surface of GO.The tensile strength and elongation at break of nanocomposites are increased first and then decreased with the increase of iGO.Uniform dispersion of iGO is observed in the PU matrix when the content is less than 1％(mass fraction).It is found that the most significant improvement of the tensile strength(4.26MP)and elongation at break(500％)is obtained with iGO at 1％content.When compared with neat TPU,the increase is 127.1％and 27.3％,respectively.关键词
氧化石墨烯/聚氨酯/纳米复合材料/力学性能Key words
graphene oxide/polyurethane/nanocomposites/mechanical property分类
化学化工引用本文复制引用
严红革,曾跃辉,陈宪宏..石墨烯/聚氨酯纳米复合材料的制备及力学性能研究*[J].湖南大学学报（自然科学版）,2018,45(6):45-50,6.基金项目
国家自然科学基金资助项目(51374102),National Natural Science Foundation of China(51374102) （51374102）
湖南省自然科学基金资助项目(14JJ5020),National Natural Science Foundation of Hunan Province(14JJ5020) （14JJ5020）
湖南省教育厅基金资助项目(16K025) （16K025）
