High energy storage density polymer composite dielectric and preparation method thereof
A high energy storage density, polymer technology, applied in the field of dielectric materials and energy storage material preparation, can solve the problems of reducing the breakdown strength of composite materials, limiting the energy storage density of composite materials, increasing dielectric loss, etc., to improve the dispersion. , the effect of reducing internal defects and reducing dielectric loss
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Embodiment 1
[0044] This embodiment relates to a high energy storage density polymer composite dielectric, the composite material is made of 97.5% by mass fraction of PVDF as a matrix and 2.5% by mass fraction of 2-amino-3-(3,4-dihydroxyphenyl) Propionate-1H,1H,2H,2H-perfluorodecyl modified titanium dioxide nanosheets as filler composition. Wherein 2-amino-3-(3,4-dihydroxyphenyl)propionic acid-1H,1H,2H,2H-perfluorodecyl modified titanium dioxide nanosheets are prepared by the following steps:
[0045] A, titanium dioxide nanosheets: synthesized according to the method reported in the literature (X.G.Han, et al., J.Am.Chem.Soc., 2009, 131, 3152.);
[0046] B. Dopamine with a long chain structure: 1H, 1H, 2H, 2H-perfluorodecyl alcohol reacts with L-3,4-dihydroxyphenylalanine to obtain 2-amino-3-(3,4-dihydroxy phenyl)propionic acid-1H,1H,2H,2H-perfluorodecyl ester. The synthesis of this long-chain dopamine adopts the method in the literature (Manolakis, I. et al., Macromol. Rapid Commun. 20...
Embodiment 2
[0054] This embodiment relates to a high energy storage density polymer composite dielectric, the composite material consists of 85% by mass fraction of P (VDF-HFP) as a matrix and 15% by mass fraction of 2-amino-3-(3,4- Dihydroxyphenyl)decyl propionate modified barium titanate nanowires as filler composition. The barium titanate nanowires modified by decyl 2-amino-3-(3,4-dihydroxyphenyl)propionate are prepared through the following steps.
[0055] A. Barium titanate nanowires: synthesized according to the method reported in the literature (G.Y.Wang, et al., ACS Applied Materials & Interfaces 2015, 7, 18017);
[0056] B. Dopamine with a long-chain structure: 1-decanol reacts with L-3,4-dihydroxyphenylalanine to obtain decyl 2-amino-3-(3,4-dihydroxyphenyl)propionate. The synthesis of this long-chain dopamine adopts the method in the literature (Manolakis, I. et al., Macromol. Rapid Commun. 2014, 35, 71-76.).
[0057] C, dopamine-modified barium titanate nanowire filler with l...
Embodiment 3
[0064] This embodiment relates to a high energy storage density polymer composite dielectric. The composite material consists of 75% by mass fraction, P(VDF-TrFE) as a matrix and 25% by mass fraction of 2-amino-3-(3,4 -Dihydroxyphenyl)decyl propionate modified copper calcium titanate nanowires as filler composition. Wherein the preparation steps of the copper calcium titanate nanowires modified by 2-amino-3-(3,4-dihydroxyphenyl) decyl propionate are the same as in Example 2, the difference is that the high dielectric constant used The nanometer filler is copper calcium titanate nanowire. This copper calcium titanate nanowire was synthesized using the improved method in the literature (H.X.Tang, et al., NanoEnergy 2015, 17, 302-307.).
[0065] This embodiment also relates to a method for preparing a high energy storage density polymer composite dielectric, the method comprising the following steps:
[0066] Step 1, adding 3.75g of the fluorine-containing ferroelectric polymer...
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