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- 저자 : Xinjun Hu (검색결과 2 건)
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Xinjun Hu,Xiaojie Yan,Yu Ma,Yongxiao Bai 한국고분자학회 2017 폴리머 Vol.41 No.1
In order to improve the hardness and tribological properties of ultrahigh molecular weight polyethylene (UHMWPE), UHMWPE composites reinforced with graphene oxide (GO) nanosheets by ball milling is presented in this article. The results show that the content of 20 wt% GO composite exhibits the lowest friction coefficient and the best wear resistance among all specimens under distilled water lubrication conditions. The mechanism of GO content on tribological properties of the composites under dry conditions and distilled water were investigated. Super low friction coefficient value and the best wear resistance under distilled water is attributed to water provides passivation of interacting dangling bonds on the sliding surface of GO. This study provides a new path to synthesize the high wear resistance and mechanical performance GO/UHMWPE composite materials under water condition and may have huge potential applications in many related fields, such as biomedical and marine engineering.
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Lijun Jin,Yiqi Wu,Xinjun Hu,Qinjia Chen,Yue Lu,Yongxiao Bai 한국섬유공학회 2023 Fibers and polymers Vol.24 No.2
It is widely recognized that combining alginate with graphene oxide (GO) is an effective method in improving the propertiesof alginate fiber. However, how the lateral size of GO influences the properties of the composite fiber is still unclear. Inthis work, GO was separated into four kinds of different lateral sizes with the assistance of centrifugation and high-powerultrasound. The tensile strength of calcium alginate/graphene oxide (CaAlg/GO) composite fiber increased with the lateralsize of GO. Surprisingly, the combination of large and small GO performed the superior reinforcement effect. The tensilestrength and Young’s modulus increased from 407.66 MPa and 13.87 GPa to 556.97 MPa and 20.57 GPa, respectively. Inaddition, the water absorption ability of CaAlg/GO composite fiber reduced with the decreasing of the lateral size of GO. With significantly improved mechanical properties and fine biocompatibility, the CaAlg/GO composite fibers may havepotential applications in the biotechnological, biomedical, and tissue engineering areas.
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