In situ polymerization and mechanical, thermal properties of polyurethane/graphene oxide/epoxy nanocomposites
In situ polymerization and mechanical, thermal properties of polyurethane/graphene oxide/epoxy nanocomposites
复制标题
DOI：
10.1016/j.matdes.2012.12.077
复制
发表时间：
2013-05-01
影响因子：
8.4
通讯作者：
Wang, Tingmei
中科院分区：
文献类型：
--
作者：
Li, Yuqi;Pan, Diyuan;Wang, Tingmei
首次报道了在氧化石墨烯纳米片（GONS）上原位合成的聚氨酯/环氧树脂（PU/EP）复合材料的显著增强作用。首先，在GONS上原位合成PU预聚体。然后，加入环氧树脂和固化剂制备PU/氧化石墨烯/环氧树脂（PU/GO/EP）纳米复合材料。形态学研究表明，由于形成了化学键，GONS在PU/EP基体中分散良好，与基体之间形成了较强的界面相互作用。当GONS的质量分数为0.066%时，PU/GO/EP纳米复合材料的拉伸模量从218 MPa提高到257 MPa，拉伸强度和断裂伸长率分别提高了52%和103%以上。并初步提出了增强机理。热重分析结果表明，氧化石墨烯对PU/GO/EP纳米复合材料的热稳定性影响不大。希望我们的工作能为石墨烯基聚合物复合材料的制备提供一种有效的、有前途的方法。(C)2013爱思唯尔有限公司保留所有权利。
Significant reinforcement of polyurethane/epoxy (PU/EP) composites in situ synthesized on the graphene oxide nanosheets (GONS) is reported for the first time. Firstly, the PU prepolymer was in situ synthesized on the GONS. Then, the EP and a curing agent were added to prepare the PU/graphene oxide/EP (PU/GO/EP) nanocomposites. Morphologic study shows that, due to the formation of chemical bonding, the GONS was dispersed well in the PU/EP matrix and formed a strong interfacial interaction between the GONS and the matrix. With the incorporation of 0.066 wt% of GONS, the tensile modulus of PU/GO/EP nanocomposites increased from 218 MPa to 257 MPa, the tensile strength and elongation at the break of the PU/GO/EP nanocomposites increased by more than 52% and 103%, respectively. Additionally, the enhancing mechanism was tentatively proposed. The thermogravimetric analysis tests show that graphene oxide slightly changed the thermal stability of PU/GO/EP nanocomposites. It is hoped that our current work could provide an effective and promising method for preparing graphene-based polymer composites. (C) 2013 Elsevier Ltd. All rights reserved.