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| Preparation and Heat Treatment of Nanocomposites of PBT/Graphene Oxide |
Wenqiang XIAO1,Huan HUANG1,Lin CHEN1,Lei YAN1,Jun BIAN1( ),Yun LU2 |
1. Key Laboratory of Automobile High Performance Materials & Forming Technology in Sichuan Provincial Universities, School of Materials Science and Engineering, Xi-Hua University, Chengdu 610039, China
2. Department of Mechanical Engineering, Graduate School of Science and Engineering, Graduate School of Science and Engineering, Chiba University, Chiba 262-8522, Japan |
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Cite this article:
Wenqiang XIAO,Huan HUANG,Lin CHEN,Lei YAN,Jun BIAN,Yun LU. Preparation and Heat Treatment of Nanocomposites of PBT/Graphene Oxide. Chinese Journal of Materials Research, 2019, 33(2): 95-102.
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Abstract The graphene oxide (GO) was firstly synthesized by the Hummer method, and then the nanocomposites of PBT/GO with different GO contents were prepared by melt blending. The mechanical properties of the PBT/GO-nanocomposites were tested. Results show that the tensile strength and impact strength of the nanocomposites increased first and then decreased with the increase of GO content, however the PBT/GO-nanocomposite with 0.5% GO exhibits the best mechanical performance. The PBT/GO nanocomposite with 0.5% GO was selected for further heat-treatment at various temperatures (150oC, 180oC and 200oC) for differnet times (30 min, 60 min and 90 min), then the effect of heat-treating on its structure and properties were investigated. With the increase of heat treatment temperature the tensile strength and impact strength could reach as high as 63.2 MPa and 11.6 kJ/m2, which increased by 36.1% and 59.3%, respectively compared with those of untreated ones. With the prolongation of heat treatment time, the tensile strength and impact strength of the composite could reach up to 62.3 MPa and 11.0 kJ/m2, which increased by 34.2% and 51.9%, respectively. DSC tests show that with the increasing heat treatment temperature and time the degree of crystallinity of the composites was enhanced by 11.4% and 8.6% respectively, however the heating temperature has much strong influence on the degree of crystallinity rather than holding time. XRD results show that heat treatment did not change the crystallographic structure of the composite. With the increasing heat treatment temperature, the thermal conductivity of the composite was 0.49 W/(m·K) and 0.42 W/(m·K) measured at 50oC and 100oC respectively. Correspondingly, which increased by 24.1% and 18.6%, respectively in comparison with those of the non-heat treated ones. With the increasing heat treatment time, the thermal conductivity of the composite could rach up to 0.46 W/(m·K) and 0.37 W/(m·K) at 50oC and 100oC, which increased by 14.6% and 5.9% in comparison to those of the non-heat treated ones. Besides, the heat treatment temperature presents much obvious influence on the enhancement of the thermal conductivity of the composite.
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Received: 20 June 2018
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| Fund: Supported by Cooperation Project of Chunhui Plan of the Ministry of Education of China(Z2017070);Open Research Fund Project of Key Laboratory of Automotive High-performance Materials and Forming Technology of Universities in Sichuan Province(SZjj2017-066);Scientific Research Project of Sichuan Education Department(17ZB0422);The National Innovation and Entrepreneurship Training Program for College Students(201810623007);The National Innovation and Entrepreneurship Training Program for College Students(201710623098);Program of Youth Scientific and Technological Innovation Research Team(19CXTD0050) |
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