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Thermal properties of amino-functionalized multi-walled carbon nanotubes reinforced epoxy-based transducers embedded in concrete
Abstract Aiming to improve the thermal properties of ultrasonic transducers used in concrete structure, a novel amino-functionalized multi-walled carbon nanotubes (MWCNTs) reinforced epoxy/cement composite was designed to prepare the packaging layer of ultrasonic transducers. Thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), thermal conductivity test, and thermal expansion test were conducted to investigate the effects of different amounts of amino-functionalized MWCNTs (amino-MWCNTs) on the thermal properties of the transducer packaging materials. The results showed that, the optimal thermal properties of the ternary composite are achieved when the amino-MWCNT content of epoxy matrix is 1.25 wt%. Compared with the epoxy/cement binary composite, the thermal conductivity of the ternary composite with the optimal content of amino-MWCNTs at 25 °C increased by 116.3%, and the expansion ratio at 60 °C reduced by 51.6%. The improvement of thermal properties of the ternary composite is benefit from the homogeneous dispersion of amino-MWCNTs in the matrix. The addition of amino-MWCNTs in the transducer is proved to improve the thermal properties of the embedded transducer packaging layer in concrete structure under the action of alternate wetting and drying thermal cycles.
Thermal properties of amino-functionalized multi-walled carbon nanotubes reinforced epoxy-based transducers embedded in concrete
Abstract Aiming to improve the thermal properties of ultrasonic transducers used in concrete structure, a novel amino-functionalized multi-walled carbon nanotubes (MWCNTs) reinforced epoxy/cement composite was designed to prepare the packaging layer of ultrasonic transducers. Thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), thermal conductivity test, and thermal expansion test were conducted to investigate the effects of different amounts of amino-functionalized MWCNTs (amino-MWCNTs) on the thermal properties of the transducer packaging materials. The results showed that, the optimal thermal properties of the ternary composite are achieved when the amino-MWCNT content of epoxy matrix is 1.25 wt%. Compared with the epoxy/cement binary composite, the thermal conductivity of the ternary composite with the optimal content of amino-MWCNTs at 25 °C increased by 116.3%, and the expansion ratio at 60 °C reduced by 51.6%. The improvement of thermal properties of the ternary composite is benefit from the homogeneous dispersion of amino-MWCNTs in the matrix. The addition of amino-MWCNTs in the transducer is proved to improve the thermal properties of the embedded transducer packaging layer in concrete structure under the action of alternate wetting and drying thermal cycles.
Thermal properties of amino-functionalized multi-walled carbon nanotubes reinforced epoxy-based transducers embedded in concrete
Zhang, Shunquan (author) / Zhang, Heng (author) / Jia, Zijian (author) / Cao, Ruilin (author) / Xiong, Yuanliang (author) / Chen, Chun (author) / Zhang, Yamei (author)
2022-01-10
Article (Journal)
Electronic Resource
English
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