Abstract
Polymer composites with high dielectric constants are highly desired in advanced electronic devices and the modern electrical industry. The dielectric constant of three-dimensional filler-reinforced polymer composites is usually enhanced at the expense of flexibility. Herein, barium titanate inverse opals (BT_IOs) that have three-dimensionally ordered and interconnected macropores are prepared and introduced into a poly (vinylidene fluoride) (PVDF) matrix to tailor their dielectric properties. The composite films with 30 wt% BT_IOs exhibit a dielectric constant of 18.8 at 1 kHz, showing an enhancement of 154% and 35% compared with that of pristine PVDF and their corresponding composites reinforced with barium titanate nanoparticles, respectively. Meanwhile, the dielectric loss is suppressed at 0.088. The BT_IOs/PVDF composite films also maintain good flexibility and can be freely bent. This design of three-dimensionally ordered macroporous filler-reinforced polymer composites with improved dielectric constants and good flexibility presents promising applications of dielectric materials in flexible electronics.
Similar content being viewed by others
Avoid common mistakes on your manuscript.
1 Introduction
Materials with high dielectric constants are extensively explored because of their potential applications in advanced electronics and the modern electrical industry, such as in dielectric elastomer actuators, transistors, electrostatic capacitors and electrical stress control systems [1,2,3]. Polymer dielectric composites are expected to integrate excellent flexibility and easy processing of polymer matrixes with fillers with high dielectric constants. Various types of fillers, such as linear dielectrics [4, 5], paraelectrics [6, 7], ferroelectrics [8, 9], relaxor ferroelectrics[10], antiferroelectrics [11, 12], giant dielectric constant fillers [13, 14] and conductive fillers [15, 16], have been introduced into polymers to tailor their dielectric properties. Their high dielectric constants usually result from two aspects. First, ceramic fillers with a high intrinsic dipole strength can enhance the effective dipole strength of polymer composites according to the effective medium theory [17]. Second, differences in dielectric constants or conductivities between matrix and fillers can induce Maxwell–Wagner–Sillars effect or equivalent microcapacitor effect [18,19,20].
Filler dimensions or morphologies also greatly affect the dielectric properties of polymer composites [21,22,23]. Hao et al. [24] introduced ultrafine barium titanate nanoparticles (BT_NPs) into a poly(vinylidene fluoride-co-hexafluoro propylene) (P(VDF-HFP)) polymer matrix. The 70 vol% BT_NP/P(VDF-HFP) polymer composites exhibit a dielectric constant of about 34 at 1 kHz, showing a 240% enhancement compared with that of pristine P(VDF-HFP). Given that the high dielectric constant of zero-dimensional (0D) nanofiller/polymer composites is usually obtained at high filler contents, its considerable enhancement is usually achieved at the expense of increased dielectric loss and deteriorated mechanical properties. As an alternative solution, anisotropic nanofillers are introduced into polymer dielectric composites [25,26,27,28]. Owing to the large susceptibility along the longitudinal direction of one-dimensional nanofillers and in-plane directions of two-dimensional nanofillers, anisotropic nanofillers are capable of inducing substantially higher dielectric constants at the same filler content than their 0D counterparts [29, 30]. Three-dimensional (3D) fillers show great potential in boosting the dielectric constants of polymer composites because of their continuous transmission of polarization throughout the 3D framework [31] or continuous coupling effect of interconnected adjacent filler grains [32]. Feng et al. [33] theoretically demonstrated that constructing ceramic frameworks in polymer matrixes effectively boost their dielectric constants at low filling contents.
The structures of 3D fillers have a crucial effect on the dielectric properties of polymer composites. Although several types of 3D fillers have been developed [34,35,36,37], three-dimensionally ordered macroporous (3DOM) fillers have not been utilized thus far. Herein, we prepared BT inverse opal (BT_IO) particles with 3DOM structures via a templated sol–gel method and introduced them into PVDF matrix to tailor their dielectric properties. The polymer composites with 30 wt% BT_IOs exhibit a dielectric constant of 18.8 and a dielectric loss of 0.088 at 1 kHz. Although the BT_IO/PVDF composite films exhibit a lower dielectric constant enhancement than the polymer composites in which 3D fillers exist as a whole, they maintain better flexibility. Therefore, they show promising applications in flexible electronics.
2 Materials and methods
2.1 Materials
Styrene and sodium dodecyl sulfate were purchased from Damao Chemical Reagent Factory (Tianjin, P.R. China). Acetylacetone was purchased from Tianjin Kemiou Chemical Reagent Co., Ltd (Tianjin, P.R. China). Barium hydroxide octahydrate, tetrabutyl titanate, acetic acid, ethanol and N,N-dimethylformamide were purchased from Sinopharm Chemical Reagent Co., Ltd (Shanghai, P.R. China). PVDF powders with Mw = 534,000 were purchased from Sigma-Aldrich Trading Co., LTD (Shanghai, P.R. China). Styrene was alternately washed with 0.1 M NaOH and deionized water to remove polymerization inhibitors before use.
2.2 Preparation of BT precursor
In a typical process, 0.01 mol of barium hydroxide octahydrate was added into 10 mL of acetic acid and refluxed at 60 °C. The solution was cooled to 0 °C in an ice water bath after barium hydroxide octahydrate completely dissolved. Another solution containing 0.01 mol of tetrabutyl titanate, 20 mL of ethanol and 1 mL of acetylacetone was prepared and added to the Ba-contained solution drop by drop under continuously magnetic stir. The obtained transparent yellow solution was used as BT precursor after aging for 24 h at room temperature.
2.3 Fabrication of BT_IO particles
Monodisperse polystyrene (PS) spheres were synthesized adopting an optimized version of literature techniques and assembled into artificial opal templates via a thermal-assisted colloidal assembly method [38]. BT_IO particles were fabricated via a sacrificial template method. Typically, BT precursor was dropped on the edge of opal templates. The interstices between colloidal spheres were filled with BT precursor by capillary action. After kept at room temperature for more than 6 h, the composites were calcined for 4 h in a muffle furnace to fabricate BT_IOs. BT_NPs were prepared by calcining the same precursor.
2.4 Fabrication of BT/PVDF composite films
BT fillers were dispersed in N,N-dimethylformamide by ultrasonication. Then, PVDF was added into the suspension in proportion. After mechanically stirred for 12 h, the mixture was cast on clean glass slides and dried in vacuum at 80 °C. The dried composite films were further heated at 200 °C for 10 min and then immediately quenched in ice water. Flexible BT/PVDF films were obtained after the quenched films were heated in vacuum at 80 °C to remove residual water and peeled off from the glass slides.
2.5 Characterization
Scanning electron microscopy (SEM) images were obtained using a Nova Nano SEM 450 scanning electron microscope. Optical photos were captured with a Nikon digital camera. Phase composition of the BT samples was studied by powder X-ray diffraction (XRD) analysis using a Rigaku D/MAX 2500 diffractometer with a filtered Cu Ka radiation (λ = 1.5405 Å). Raman spectroscopy was performed in air by using a backscattering micro-Raman spectrometer with helium–neon laser (633 nm) excitation. The dielectric properties were tested at frequency from 102 to 106 Hz with 0.5 V rms by an Agilent 4294A LCR impedance analyzer. The Au layer electrode with a diameter of 4 mm was sprayed on both sides prior to test.
3 Results and discussion
3.1 Preparation and characterization of BT_IOs
3DOM BT particles were prepared via a templated sol–gel method (Fig. 1a) [39]. PS spheres were assembled into closely packed face-centered cubic (FCC) structures on glass substrates to form an opal template by thermally assisted self-assembly method. Subsequently, the aged BT precursor was infiltrated into the template and gradually solidified. Finally, the opal template was removed by calcination.
Monodisperse PS spheres were prepared via emulsifier-free emulsion polymerization and directly used to prepare opal templates without purification. The elaborate PS opal templates present close-packed FCC arrangements (Fig. 1b and c). The aged BT precursor was carefully infiltrated into the templates to ensure that their structures could survive. After solidification and calcination at 650 °C, the PS opals burned out and the BT particles formed an inverse structure (Fig. 1d and e). The O, Ti and Ba elements were uniformly distributed (Fig. 1f), indicating that the BT_IOs were chemically homogeneous. The average diameter of the PS spheres is 440 nm, whereas the average center-to-center distance between neighboring air spheres in the obtained BT_IOs is 290 nm, showing a shrinkage factor of about 34%. The pores connecting two neighboring air spheres have a diameter of about 80 nm. Moreover, the pores are arranged in 3D in BT_IOs, as indirectly evidenced by the structural color of the BT_IO film (Fig. S1). Islands of BT_IO formed on the glass substrates because of the intensive shrinkage (Fig. S2). Consequently, BT_IOs could be easily collected by stripping from the coverslips. The 3DOM structure allowed polymer infiltration and thus the formation of dense BT_IO/PVDF composite films.
The XRD patterns of BT_IOs and BT_NPs prepared at different calcination temperatures were determined to identify their phase compositions (Fig. 2a). BT powders crystallized at temperatures above 600 ℃. All samples calcined at above 600 °C contain trace amounts of impurities, which are dominated by BaSO4 and BaCO3 in BT_IOs and BT_NPs, respectively. In the preparation of PS spheres, the sulfur element was introduced using potassium peroxydisulfate as the initiator. As a result, BaSO4 appears as an impurity in BT_IOs.
A comparison of two 600 ℃ X-ray lines reveals that the PS templates affect BT crystallization. The same trend in which high-temperature benefit crystallization is observed for both BT_NPs and BT_IOs. Notably, the splitting of reflection peak at about 2θ = 45°, which is used to distinguish the tetragonal phase of BT from its cubic phase, is not observed for all X-ray lines. Nevertheless, the phase of the products cannot be classified as a cubic phase because of the inherent line-broadening effect resulting from the small crystal size [40, 41].
Given that the softening deformation of coverslip substrates occurred at above 650 °C, the BT_IOs used as fillers were calcined at 650 °C. For comparison, the BT_NP fillers were also obtained at 650 °C. Raman scattering was conducted to ascertain further the crystal structures of the BT fillers. On the basis of the crystallography, 10 Raman-active modes were predicted for tetragonal BT with a space group of P4 mm; symmetry demands that cubic BTs with a space group of Pm3m should be completely Raman-inactive [42]. Nevertheless, owing to the disorder of titanium in the nominally cubic BT, broad peaks at about 250 and 520 cm−1 can be observed above the Curie temperature [43]. The room temperature Raman spectra of the BT fillers are shown in Fig. 2b. The band centered at 183 cm−1 is assigned to the fundamental TO mode of A1 symmetry. The sharp peak at 304 cm−1 is attributed to B1 mode, indicating asymmetry within the TiO6 octahedra of BaTiO3 on a local scale. The weak peak at 715 cm−1 is related to the highest frequency LO mode with A1 symmetry [44]. Among these peaks, the peak at about 183 cm−1 other than 194 cm−1 distinguishes the tetragonal from the orthorhombic phase. The peaks at 304 and 715 cm−1 distinguish the tetragonal phase from the cubic phase because they disappear above the Curie temperature. The strong peak at 304 cm−1 suggests that the tetragonal phase is dominant in BT_NPs, but its intensity decreases in BT_IOs. These results demonstrate that the PS spheres indeed affect BT crystallization, consistent with the XRD results. Furthermore, the peaks at 984 and 1055 cm−1 signify the existence of BaSO4 and BaCO3 in BT_IO and BT_NP, respectively.
3.2 Morphologies and dielectric properties of BT/PVDF composite films
PVDF solution infiltrates into BT_IO particles by capillary action and gravity, forming dense and defect-free composite films after drying (Fig. 3a–h), and BT_IOs are evenly distributed in the composite films (Figs. S3 and S4). When the filling content is less than 20 wt%, the composite films exhibit smooth surfaces on both sides (Fig. 3a, d and g). As the filling content further increases, the top surfaces of BT_IO/PVDF composite films become rough (Fig. 3e and f) because the 3DOM BT_IOs stack and exceed the top film surface without confinement (Fig. 3h). Even though, the composite films exhibit excellent flexibility and can be freely bent because the 3D fillers are not a whole (Fig. 3i).
The frequency dependence of the dielectric constant and loss of BT_IOs/PVDF is presented in Fig. 4a and b, respectively. The dielectric constant of all BT_IOs/PVDF films decreases as the frequency changes from 102 to 106 Hz. At the same frequency within this range, the dielectric constant gradually increases as the filler content increases. For example, the dielectric constant of the 30 wt% BT_IO/PVDF composite films reaches 18.8 at 1 kHz, showing a 154% enhancement compared with that of pristine PVDF (7.4), and the dielectric loss is maintained at 0.088.
For comparison, the dielectric properties of the BT_NP/PVDF composite films were also measured (Fig. 4c). The dielectric constant and loss at 1 kHz of the composite films with various filler contents are summarized (Fig. 4d). The dielectric loss shows a relatively sharp increase as the filler content increases from 15 wt% to 20 wt%. This result is attributed to the formation of a continuous network in the composite films, as depicted in Fig. 5a. BT_IOs are separately distributed when the filler content is lower than the critical value (fc), and a continuous network forms when the filler content is equal to fc. As the filler content overcomes fc, the BT_IO particles stack together and exceed the top film surface (Fig. 3h). The dielectric loss of the BT_NP/PVDF composite films also shows a relatively sharp increase at the filler content of 30 wt% because of filler aggregations. The difference in the critical filler contents is due to differences in bulk density (Fig. S5).
Aside from differences in dielectric loss, differences in the dielectric constants are evident. The BT_IO/PVDF composite films show higher dielectric constants than their corresponding BT_NP/PVDF composite films because of the continuous polarization coupling effect of BT_IOs. The homogeneously distributed BT_NPs exhibit rearranged but relatively random polarization directions (Fig. 5b), whereas the connected BT particles in the BT_IOs network show an aligned polarization direction under an applied electric field (Fig. 5c), thereby efficiently enhancing the dielectric constant [33]. Moreover, the difference increases as filling content increases, which can be partly ascribed to the formation of continuous networks.
Although the dielectric properties of the BT_IO/PVDF composites are improved, the results fall short of expectations. Two main reasons are responsible for this outcome. First, the as-prepared BT_IOs have a low degree of crystallinity. Second, the 3DOM structures collapse during the filler collection and composite preparation processes, resulting in relatively small filler sizes (Fig. S6).
4 Conclusion
Introducing 3DOM fillers into a polymer matrix to tailor their dielectric properties is reported for the first time in this study. Two sizes of macropores exist inside the as-obtained BT_IO fillers. The small pores connecting the neighboring large air pores enable the complete infiltration of the PVDF matrix, thereby ensuring the formation of dense composite films. The special aggregation state of the BT particles constructing BT_IOs facilitates the continuous polarization coupling effect under an applied electric field. Collectively, the BT_IO/PVDF composite films exhibit higher dielectric constants than their corresponding BT_NP/PVDF composite films, whereas the dielectric loss maintains a low value. For example, the 30 wt% BT_IO/PVDF composite films have a dielectric constant of 18.8, which is 35% higher than that of corresponding BT_NP/PVDF composite films. Meanwhile, they show excellent flexibility and can be freely bent. This work presents a novel and universal strategy for preparing 3DOM filler-reinforced polymer composites with improved dielectric properties and good flexibility. These composites show considerable potential in achieving high dielectric constant materials for wearable electronics.
5 Supplementary data
Digital photo showing structure color of as-obtained BT_IOs; Low-magnification SEM image of as-obtained BT_IOs; Element mapping of BT_IO/PVDF composite films; Digital photo of as-obtained BT_IO and BT_NP fillers; SEM image of BT_IO fillers after stripping from the coverslips.
Change history
11 March 2021
A Correction to this paper has been published: https://doi.org/10.1007/s42452-021-04323-y
References
Huang XY, Sun B, Zhu YK, Li ST, Jiang PK (2019) High-k polymer nanocomposites with 1D filler for dielectric and energy storage applications. Prog Mater Sci 100:187–225
Tan DQ (2019) Review of polymer-based nanodielectric exploration and film scale-up for advanced capacitors. Adv Funct Mater 30:1808567
Yang LT, Kong X, Li F, Hao H, Cheng ZX, Liu HX, Li JF, Zhang SJ (2019) Perovskite lead-free dielectrics for energy storage applications. Prog Mater Sci 102:72–108
Zhang X, Chen H, Ye H, Liu A, Xu L (2020) Enhanced interfacial polarization in poly(vinylidene fluoride-chlorotrifluoroethylene) nanocomposite with parallel boron nitride nanosheets. Nanotechnol 31:165703
Li H, Ren L, Zhou Y, Yao B, Wang Q (2020) Recent progress in polymer dielectrics containing boron nitride nanosheets for high energy density capacitors. High Volt 5:365–376
Xu PP, Luo SB, Yu JY, Cao LQ, Yu SH, Sun R, Wong CP (2019) Simultaneously enhanced permittivity and electric breakdown strength of polyacrylonitrile composites by introducing ultralow content BaSrTiO3 nanofibers. Adv Eng Mater 21:1900817
Yao LM, Pan ZB, Zhai JW, Zhang GZ, Liu ZY, Liu YH (2018) High-energy-density with polymer nanocomposites containing of SrTiO3 nanofibers for capacitor application. Compos Part A-Appl S 109:48–54
Wang Y, Yao MG, Ma R, Yuan QB, Yang DS, Cui B, Ma CR, Liu M, Hu DW (2020) Design strategy of barium titanate/polyvinylidene fluoride-based nanocomposite films for high energy storage. J Mater Chem A 8:884–917
Bouharras FE, Raihane M, Ameduri B (2020) Recent progress on core-shell structured BaTiO3@polymer/fluorinated polymers nanocomposites for high energy storage: Synthesis, dielectric properties and applications. Prog Mater Sci 113:100670
Liu S, Xue S, Xiu S, Shen B, Zhai J (2016) Surface-modified Ba(Zr0.3Ti0.7)O3 nanofibers by polyvinylpyrrolidone filler for poly(vinylidene fluoride) composites with enhanced dielectric constant and energy storage density. Sci Rep 6:26198
Zou K, He C, Yu Y, Huang J, Fan Z, Lu Y, Huang H, Zhang X, Zhang Q, He Y (2020) Ultrahigh energy efficiency and large discharge energy density in flexible dielectric nanocomposites with Pb0.97La0.02(Zr0.5SnxTi0.5-x)O3 antiferroelectric nanofillers. ACS Appl Mater Interfaces 12:12847–12856
Zou K, Dan Y, Yu Y, Zhang Y, Zhang Q, Lu Y, Huang H, Zhang X, He Y (2019) Flexible dielectric nanocomposites with simultaneously large discharge energy density and high energy efficiency utilizing (Pb, La)(Zr, Sn, Ti)O3 antiferroelectric nanoparticles as fillers. J Mater Chem A 7:13473–13482
Wang J, Hu J, Yang L, Zhu K, Li B-W, Sun Q, Li Y, Qiu J (2018) High discharged energy density of polymer nanocomposites induced by Nd-doped BaTiO3 nanoparticles. J Materiomics 4:44–50
Tang H, Zhou Z, Bowland CC, Sodano HA (2015) Synthesis of calcium copper titanate (CaCu3Ti4O12) nanowires with insulating SiO2 barrier for low loss high dielectric constant nanocomposites. Nano Energy 17:302–307
Dang ZM, Zheng MS, Zha JW (2016) 1D/2D carbon nanomaterial-polymer dielectric composites with high permittivity for power energy storage applications. Small 12:1688–1701
Al-Saleh MH (2019) Carbon-based polymer nanocomposites as dielectric energy storage materials. Nanotechnol 30:062001
Nan CW (1993) Physics of inhomogeneous inorganic materials. Prog Mater Sci 37:1–116
Pan Z, Yao L, Zhai J, Yao X, Chen H (2018) Interfacial coupling effect in organic/inorganic nanocomposites with high energy density. Adv Mater 30:e1705662
Guo FM, Shen X, Zhou JM, Liu D, Zheng QB, Yang JL, Jia BH, Lau AKT, Kim JK (2020) Highly thermally conductive dielectric nanocomposites with synergistic alignments of graphene and boron nitride nanosheets. Adv Funct Mater 30:1910826
Song SL, Wang Y, Luo Y, He DL, Abella A, Deng Y (2018) One-dimensional oriented microcapacitors in ternary polymer nanocomposites: toward high breakdown strength and suppressed loss. Mater Design 140:114–122
Pan ZB, Yao LM, Zhai JW, Yang K, Shen B, Wang HT (2017) Ultrafast discharge and high-energy-density of polymer nanocomposites achieved via optimizing the structure design of barium titanates. ACS Sustain Chem Eng 5:4707–4717
Zhao QY, Yang L, Chen KN, Ma YZ, Ji HL, Shen MX, Huang HJ, He HY, Qiu JH (2019) Ultra-high discharged energy density in PVDF based composites through inducing MnO2 particles with optimized geometric structure. Nano Energy 65:104007
Bi M, Hao Y, Zhang J, Lei M, Bi K (2017) Particle size effect of BaTiO3 nanofillers on the energy storage performance of polymer nanocomposites. Nanoscale 9:16386–16395
Hao YN, Wang XH, Bi K, Zhang JM, Huang YH, Wu LW, Zhao PY, Xu K, Lei M, Li LT (2017) Significantly enhanced energy storage performance promoted by ultimate sized ferroelectric BaTiO3 fillers in nanocomposite films. Nano Energy 31:49–56
Hou C, Bao Z, Sun H, Yin Y, Li X (2020) Improved energy storage performance of nanocomposites with Bi4.2K0.8Fe2O9+δ nanobelts. J Materiomics 6:371–376
Zhang H, Marwat MA, Xie B, Ashtar M, Liu K, Zhu Y, Zhang L, Fan P, Samart C, Ye ZG (2020) Polymer matrix nanocomposites with 1D ceramic nanofillers for energy storage capacitor applications. ACS Appl Mater Interfaces 12:1–37
Bao Z, Hou C, Shen Z, Sun H, Zhang G, Luo Z, Dai Z, Wang C, Chen X, Li L, Yin Y, Shen Y, Li X (2020) Negatively charged nanosheets significantly enhance the energy-storage capability of polymer-based nanocomposites. Adv Mater 32:e1907227
Lin Y, Zhang YJ, Sun C, Zhan SL, Yuan QB, Yang HB (2020) Energy storage performance in polymer dielectrics by introducing 2D SrBi4Ti4O15 nanosheets. Ceram Int 46:15270–15275
Zhang X, Jiang J, Shen Z, Dan Z, Li M, Lin Y, Nan CW, Chen L, Shen Y (2018) Polymer nanocomposites with ultrahigh energy density and high discharge efficiency by modulating their nanostructures in three dimensions. Adv Mater 30:e1707269
Wen F, Lou HY, Ye JF, Bai WF, Wang LW, Li LL, Wu W, Xu Z, Wang GF, Zhang ZC, Zhang L (2019) Preparation and energy storage performance of transparent dielectric films with two-dimensional platelets. Compos Sci Technol 182:107759
Yang J, Zhu XT, Wang HL, Wang X, Hao CC, Fan RH, Dastan D, Shi ZC (2020) Achieving excellent dielectric performance in polymer composites with ultralow filler loadings via constructing hollow-structured filler frameworks. Compos Part A-Appl S 131:105814
Luo SB, Shen YB, Yu SH, Wan YJ, Liao WH, Sun R, Wong CP (2017) Construction of a 3D-BaTiO3 network leading to significantly enhanced dielectric permittivity and energy storage density of polymer composites. Energy Environ Sci 10:137–144
Feng YC, Liang PY, Tang B, Wang Y, Liu J, Shui LL, Li H, Tian M, Zhang LQ, Zhou GF (2019) Construction of particle network for ultrahigh permittivity of dielectric polymer composite toward energy devices: a molecular dynamics study. Nano Energy 64:103985
Zhang D-L, Liu S-N, Cai H-W, Feng Q-K, Zhong S-L, Zha J-W, Dang Z-M (2020) Enhanced thermal conductivity and dielectric properties in electrostatic self-assembly 3D pBN@nCNTs fillers loaded in epoxy resin composites. J Materiomics 6:751–759
You XQ, Chen N, Du GP (2018) Constructing three-dimensionally interwoven structures for ceramic/polymer composites to exhibit colossal dielectric constant and high mechanical strength: CaCu3Ti4O12/epoxy as an example. Compos Part A-Appl S 105:214–222
Zheng LH, Yuan L, Guan QB, Liang GZ, Gu AJ (2018) High-k 3D-barium titanate foam/phenolphthalein poly(ether sulfone)/cyanate ester composites with frequency-stable dielectric properties and extremely low dielectric loss under reduced concentration of ceramics. Appl Surf Sci 427:1046–1054
Cao M, Li L, Hong WB, Wu SY, Chen XM (2021) Greatly enhanced permittivity in BaTiO3-epoxy dielectric composites with improved connectivity of ceramic phase. J Materiomics 7:1–7
Liu FF, Xiu JH, Tang BT, Zhao DF, Zhang SF (2017) Dynamic monitoring of thermally assisted assembly of colloidal crystals. J Mater Sci 52:7883–7892
Liu F, Gao Z, Hu J, Meng Y, Zhang S, Tang B (2019) Fe3+-doped SnO2 inverse opal with high structural color saturation. J Mater Sci 54:10609–10619
Qi JQ, Sun L, Qi XW, Wang Y, Chan HLW (2011) Grain size modulation on BaTiO3 nanoparticles synthesized at room temperature. J Solid State Chem 184:2690–2694
Teresa Buscaglia M, Harnagea C, Dapiaggi M, Buscaglia V, Pignolet A, Nanni P (2009) Ferroelectric BaTiO3 nanowires by a topochemical solid-state reaction. Chem Mater 21:5058–5065
Zhu YF, Zhang L, Natsuki T, Fu YQ, Ni QQ (2012) Facile synthesis of BaTiO3 nanotubes and their microwave absorption properties. ACS Appl Mater Interfaces 4:2101–2106
Smith MB, Page K, Siegrist T, Redmond PL, Walter EC, Seshadri R, Brus LE, Steigerwald ML (2008) Crystal structure and the paraelectric-to-ferroelectric phase transition of nanoscale BaTiO3. J Am Chem Soc 130:6955–6963
Yang X, Ren Z, Xu G, Chao C, Jiang S, Deng S, Shen G, Wei X, Han G (2014) Monodisperse hollow perovskite BaTiO3 nanostructures prepared by a sol–gel–hydrothermal method. Ceram Int 40:9663–9670
Acknowledgements
This work was supported by the National Natural Science Foundation of China (21878043, 21576039, 21276042, 21421005 and U1608223), the Fundamental Research Funds for the Central Universities (DUT18ZD218), Talent Fund of Shandong Collaborative Innovation Center of Eco Chemical Engineering (XTCXYX04), Innovative Talents of Colleges and Universities in Liaoning Province (LCR2018066).
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
The authors declare that they have no conflict of interest.
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
The original version of this article has been revised: The second author’s affiliation has been corrected.
Supplementary information
Rights and permissions
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
About this article
Cite this article
Hu, J., Zhang, S. & Tang, B. Three-dimensionally ordered macroporous BaTiO3 framework-reinforced polymer composites with improved dielectric properties. SN Appl. Sci. 3, 52 (2021). https://doi.org/10.1007/s42452-021-04166-7
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s42452-021-04166-7