研究目的
Investigating the effects of controlling phase morphology and incorporating conductive multi-walled carbon nanotubes (MWCNTs) on the mechanical, thermal, and dielectric properties of polyvinylidene ?uoride (PVDF) dielectric nanocomposites.
研究成果
The study demonstrated that controlling phase morphology and incorporating MWCNTs can signi?cantly improve the mechanical, thermal, and dielectric properties of PVDF nanocomposites. The method provides a simple and cost-effective way to fabricate high-performance dielectric materials.
研究不足
The study focused on the effects of MWCNTs on PVDF nanocomposites but did not explore other types of conductive ?llers or polymer matrices. The scalability of the method for industrial applications was not addressed.
1：Experimental Design and Method Selection:
The study involved the preparation of PVDF-based dielectric nanocomposites by controlling phase morphology and incorporating conductive MWCNTs through melt blending.
2：Sample Selection and Data Sources:
PVDF (FR904) was used as the matrix, and MWCNTs were used as conductive ?llers. The MWCNTs were acidi?ed to introduce functional groups.
3：List of Experimental Equipment and Materials:
Equipment included a HL-200 mixer, XLB plate vulcanizing machine, XCS-101-200 type machine, FTIR spectrometer, XRD diffractometer, DSC, FESEM, TEM, tensile testing machine, DMA, HP4284 impedance analyzer, and ZC-36 type Four-probe resistometer. Materials included PVDF, MWCNTs, sulfuric acid, and nitric acid.
4：Experimental Procedures and Operational Workflow:
MWCNTs were acidi?ed and then incorporated into PVDF through melt blending. The nanocomposites were characterized for their mechanical, thermal, and dielectric properties.
5：Data Analysis Methods:
Data were analyzed using FTIR, XRD, DSC, SEM, TEM, tensile tests, DMA, dielectric property tests, and conductivity tests.
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X-ray diffractometer
Rigaku D/max-1200X
Rigaku
Used for XRD test of the samples
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HP4284 impedance analyzer
HP4284
Agilent Co., Ltd.
Used for obtaining the dielectric properties of the samples
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PVDF
FR904
Shanghai Sanaifu Co. Ltd.
Matrix material for the nanocomposites
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MWCNTs
Shenzhen NanoGang Co. Ltd.
Conductive ?llers for the nanocomposites
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H2SO4
Chengdu Kelong chemical Reagents Co. Ltd.
Used for the acidic treatment of the MWCNTs
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HNO3
Chengdu Kelong chemical Reagents Co. Ltd.
Used for the acidic treatment of the MWCNTs
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HL-200 mixer
HL-200
Science and education instrument factory of Jilin university
Used for melt compounding of the nanocomposites
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XLB plate vulcanizing machine
XLB
China Qingdao DongYa rubber machine Co. Ltd., The third rubber machinery factory
Used for compressing the blends into plates
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XCS-101-200 type machine
XCS-101-200
Chengde precision testing machine Co. Ltd.
Used for cutting the plate into dumbbell-type tensile samples
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Fourier transform infrared spectrometer
Nicolet 380
Nicolet
Used for characterizing the functional groups on the MWCNTs
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Differential scanning calorimetric
NETZSCH DSC-200PC
NETZSCH
Used for DSC analysis of the samples
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Field-emission scanning electron microscopy
JSM-6510LV
Japan electronics and America Company
Used for observing the microstructures at the cross-section of the nanocomposites
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Field emission transmission electron microscopy
TecnaiG2F20S-TWIN
Netherlands feieiECTRONOptics
Used for observing the dispersion of MWCNTs in PVDF matrix
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Testing machine
CMT6104
Shenzhen Sansi Zongheng technology Co., Ltd.
Used for tensile test of the samples
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Dynamic mechanical analyzer
TA-Q800
USA
Used for measuring the dynamic mechanical properties of PVDF nanocomposites
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Four-probe resistometer
ZC-36 type
Shanghai sixth meter factory Co., Ltd.
Used for obtaining the conductivity of the samples
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