研究目的
Investigating the synthesis of boron-doped single-walled carbon nanotubes (B-SWCNTs) and their application in polyurethane nanocomposites for enhanced thermal and mechanical properties, and photothermal effects under near-infrared laser irradiation.
研究成果
B-SWCNTs were successfully synthesized and incorporated into polyurethane to create nanocomposites with enhanced mechanical, thermal, and photothermal properties. The nanocomposites demonstrated rapid heating under NIR laser irradiation, making them suitable for various applications such as heat-generating coatings and de-icing materials.
研究不足
The study focuses on the synthesis and characterization of B-SWCNTs/PU nanocomposites. The practical application and long-term stability of these materials in real-world conditions were not extensively explored.
1：Experimental Design and Method Selection
The study involved the synthesis of B-SWCNTs through high-temperature heat treatment and their incorporation into polyurethane to create nanocomposites. The photothermal properties were induced by irradiating the nanocomposite with an 808 nm NIR laser.
2：Sample Selection and Data Sources
SWCNTs with an ideal diameter (1.4 ~ 1.7 nm) and high purity (>95 wt%) synthesized by an arc discharge process were used. Polyurethane was synthesized using poly(tetramethylene glycol), 4,4`-methylene bis(phenylisocyanate), and 1,4-butanediol.
3：List of Experimental Equipment and Materials
Raman spectroscopy, UV-vis spectrophotometer, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, field-emission scanning electron microscopy, thermogravimetric analysis, differential scanning calorimeter, universal testing machine, NIR laser, IR camera.
4：Experimental Procedures and Operational Workflow
B-SWCNTs were synthesized and dispersed in polyurethane to form nanocomposites. The composites were characterized for their mechanical, thermal, and photothermal properties. Photothermal measurements were conducted using an NIR laser.
5：Data Analysis Methods
The data were analyzed to evaluate the mechanical properties, thermal stability, electrical conductivity, and photothermal conversion efficiency of the nanocomposites.
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X-ray photoelectron spectroscopy
K-Alpha
ThermoFisher Scientific
Quantifying the substitutional amount of boron atoms in SWCNTs.
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Fourier transform infrared spectrometer
IR Prestige-21
Shimadzu
Identifying the structure of the pure PU, and SWCNT/PU and B-SWCNT/PU nanocomposites.
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Field-emission scanning electron microscope
NOVA Nano SEM50
FEI
Observing the cross-sectional morphologies of the pure PU and B-SWCNT/PU nanocomposites.
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NIR laser
PSU-III-LED
CNI laser
Inducing photothermal properties on the surface of the B-SWCNTs.
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IR camera
A320M
FLIR System
Detecting heat energy generated from the specimen.
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UV-vis/NIR spectrophotometer
V-670
Jasco
Observing the dispersion behaviour of the CNTs in the organic solvent.
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Raman microscope
inVia-reflex
Renishaw
Characterizing carbon materials to estimate the number of walls from radial breathing mode (RBM) peaks in CNTs, or to distinguish between ordered and disordered crystal structures.
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Thermogravimetric analyzer
Q50
TA Instrument
Examining the thermal stability of the pure PU, and SWCNT/PU and B-SWCNT/PU nanocomposites.
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Differential scanning calorimeter
2010 DSC
TA instrument
Understanding the effect of the boron doped tubes on the melting and crystallization behavior of PU.
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Universal testing machine
5567A
Instron
Evaluating mechanical properties at room temperature according to the ASTM D638 test method.
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