Preparation and properties of 3D graphene-multi walled carbon nanotube/thermoplastic polyurethane composites

被引：0
|
作者：
Zhao L. [1 ]
Li B. [1 ]
Wu S. [1 ]
Li Z. [1 ]
Li Q. [1 ]
机构：
[1] Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming
来源：
Li, Bin (kmlb@vip.sina.com) | 1600年 / Beijing University of Aeronautics and Astronautics (BUAA)卷 / 37期
关键词：
Electrical conductivity; Graphene oxide; Mechanical properties; Multi walled carbon nanotubes; Thermal stability; Thermoplastic polyurethane;
D O I：
10.13801/j.cnki.fhclxb.20190509.001
中图分类号：
学科分类号：
摘要：
The 3D graphene-multi walled carbon nanotube/thermoplastic polyurethane (GA-MWCNTs/TPU) composites were prepared using 3D graphene-multi walled carbon nanotubes aerogels (GA-MWCNTs) and thermoplastic polyurethane (TPU). GA-MWCNTs was prepared by hydrothermal reduction method for grafting carboxylated multi-walled carbon nanotubes (MWCNTs-COOH) onto graphene oxide (GO) and then freeze-drying. Subsequently, the filling TPU was impregnated the GA-MWCNTs in a vacuum state to obtain the GA-MWCNTs/TPU composite. The chemical structure and microstructure of GA-MWCNTs were characterized by means of FTIR, Raman, XPS, TEM and SEM, then MWCNTs-COOH mass fraction effect on the GA-MWCNTs/TPU composite performance was analyzed by means of TGA-DSC, resistance measuring instrument and mechanical testing machine. The results demonstrate that MWCNTs-COOH can cross-linking and support the GO inter-lamellar structures, forming a honeycomb 3D network structure with a pore size of about 1.2 mm. When the mass fraction of MWCNTs-COOH (using 120 mg GO as reference) is 10wt%, the electrical conductivity, thermal stability and mechanical properties of GA-MWCNTs/TPU composite are greatly improved. Compared with the GA/TPU, the volume resistivity of GA-MWCNTs/TPU composite reduces by 63.0%, thermal decomposition temperature increases by 7℃, and the stress at 30% strain increases by 8.2%. © 2020, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
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页码：242 / 251
页数：9
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