研究目的
To develop enhanced multiwalled carbon nanotube (MWCNT) conductive polymeric nanocomposites by using an acidified derivative of MWCNT as a dispersant to improve the dispersion and conductivity of MWCNTs within a polymer matrix.
研究成果
The hybrid MWCNTs prepared through ultrasonic hybridization of pristine MWCNTs and acidified MWCNTs exhibited high storage stability in water and excellent intrinsic conductivity. The hybrid MWCNTs/PVB nanocomposites showed significantly enhanced conductivity, thermal stability, and mechanical properties at low MWCNTs content, demonstrating the effectiveness of the hybrid MWCNTs structure in improving the performance of polymeric nanocomposites.
研究不足
The study focuses on the use of acidified MWCNTs as dispersants for pristine MWCNTs in PVB nanocomposites. The applicability of this method to other polymer matrices and the long-term stability of the nanocomposites under various environmental conditions were not explored.
1：Experimental Design and Method Selection:
The study involved the preparation of acidified MWCNTs by refluxing pristine MWCNTs in concentrated nitric acid, followed by the preparation of hybrid MWCNTs through ultrasonication of pristine MWCNTs with acidified MWCNTs dispersion. The hybrid MWCNTs were then used to prepare buckypaper and nanocomposites with polyvinyl butyral (PVB).
2：Sample Selection and Data Sources:
Industrial MWCNTs were used as the pristine material, and nitric acid was used for acidification. The nanocomposites were prepared with varying contents of MWCNTs.
3：List of Experimental Equipment and Materials:
Equipment included an ultrasonic bath, tip ultrasonicator, SEM, FTIR spectrometer, Raman spectrometer, Zetasizer Nano-ZS instrument, UV-visible absorption spectrometer, four-point probe, and high-resistance meter. Materials included MWCNTs, nitric acid, and PVB.
4：Experimental Procedures and Operational Workflow:
The process involved acidification of MWCNTs, preparation of hybrid MWCNTs dispersion, fabrication of buckypaper and nanocomposites, and characterization of the materials.
5：Data Analysis Methods:
The electrical conductivity, thermal stability, and mechanical properties of the nanocomposites were analyzed using various techniques including SEM, FTIR, Raman spectroscopy, and tensile testing.
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