3D Printing: Anisotropic Polymer Nanocomposites with Aligned BaTiO3 Nanowires

Share this Article

Chinese and UK researchers delve into the area of composites for use in the field of energy, releasing their findings in the recently published ‘3D printing of anisotropic polymer nanocomposites with aligned BaTiO3 nanowires for enhanced energy density.’

In this study, the authors have developed high-performance flexible poly(vinylidene fluoride–chlorotrifluoroethylene) (P(VDF–CTFE)) nanocomposites with aligned BaTiO3 nanowires using 3D printing. As 3D printing has continued to make enormous impacts in the world of industry—from automotive and racing to aerospace to construction—other areas such as energy storage are being improved too due to the use of new materials, the ability to produce complex technologies, greater affordability, speed, and more.

Main materials used in the research consisted of the following:

  • Titanium oxide powders (TiO2, anatase, 99.9% purity)
  • Sodium hydroxide (NaOH, 96% purity)
  • Barium hydroxide octahydrate (Ba(OH)28H2O, 99.9% purity)
  • Hydrochloric acid solution (HCl, 37 wt%)
  • Dimethylformamide solvent (DMF, 99.5% purity)

“The BaTiO3 nanowires were synthesized by a hydrothermal method according to previous work. Firstly, 1.446 g of TiO2 was added to 70 ml NaOH solution (10 M) and the mixture was stirred for 2 h to form a homogeneous suspension,” concluded the researchers. “The hydrothermal reactions were carried out at 210 °C under an auto-generated pressure for 24 h in a 100 ml Teflon-lined autoclave. The Na2Ti3O7 products were washed using distilled water and then soaked in diluted 0.2 M HCl solution for 4 h to obtain hydrogen titanate nanowires (H2Ti3O7). Secondly, 0.150 g H2Ti3O7 were dispersed in 70 ml Ba(OH)2·8H2O solution (0.1 M) and the mixture was sonicated for 10 min.

“The hydrothermal reactions were carried out at 210 °C under auto-generated pressure for 24 h in a 100 ml Teflon-lined autoclave. The products were soaked in 0.2 M HCl solution briefly, then washed with distilled water several times and dried at 80 °C in an oven.”

Sample nanocomposites were created, with BaTiO3 nanowires volume fractions of 2.5, 5.0, and 7.5%.

Alignment of BaTiO3 nanowires in nanocomposites: photographs of (a) the printing assembly and (b) a printed nanocomposite sample; schematic illustrations of (c) the alignment of BaTiO3 nanowires in the P(VDF–CTFE) matrix and (d) a nanocomposite capacitor for energy storage applications.

While extruding, BaTiO3 nanowires aligned parallel due to the high-shear environment.

(a) SEM image of BaTiO3 nanowires; (b) HRTEM image of a single BaTiO3 nanowire; (c) SEM and (d) POM images of nanocomposites prepared by 3D printing with 5 vol% aligned BaTiO3 nanowires.

Varied BaTiO3 nanowire loadings were fabricated via 3D direct writing for comparison with the other samples made conventionally.

“The permittivity of the nanocomposites with aligned BaTiO3 nanowires is smaller than that of nanocomposites with random BaTiO3 nanowires,” stated the researchers. “For example, when the loadings of random BaTiO3 nanowires is 2.5, 5.0 and 7.5 vol%, the permittivity of the nanocomposites with random BaTiO3 nanowires is 14, 15.5 and 21.5, respectively, while the permittivity of the nanocomposites with aligned BaTiO3 nanowires is 12, 14 and 17.5, respectively.”

Frequency dependence of (a) relative dielectric permittivity and (b) dielectric loss of BaTiO3/P(VDF–CTFE) nanocomposites with aligned BaTiO3 nanowires, (c) relative dielectric permittivity of nanocomposites with random distributed BaTiO3 nanowires; (d) relative dielectric permittivity of the nanocomposites as a function of volume fraction at 1 kHz.

It was noted that saturation polarization accelerated with increasing BaTiO3 loading because of high permittivity of fillers and interfacial polarization.

“The discharged energy density of all composites is similar at low field, but at high field increases with increasing loading level. The maximum energy density achieved in nanocomposites with aligned BaTiO3 nanowires was 14.52 J cm−3 for the sample with 5.0 vol% loading, which is 55% higher than that of the nanocomposite with randomly aligned BaTiO3 nanowires at the same loading level,” concluded the researchers. “The results showed that the composite with 5.0 vol% BaTiO3 nanowires get the balance point, which simultaneously achieved high polarization and breakdown strength.”

What do you think of this news? Let us know your thoughts! Join the discussion of this and other 3D printing topics at 3DPrintBoard.com.

[Source / Images: ‘3D printing of anisotropic polymer nanocomposites with aligned BaTiO3 nanowires for enhanced energy density’]

Share this Article


Recent News

NASA Refines Space Station Urine Recycling with 3D Printing

Honeywell Tests Alloyed’s High Temp Alloy for Aerospace Metal 3D Printing



Categories

3D Design

3D Printed Art

3D Printed Food

3D Printed Guns


You May Also Like

NTT DATA XAM and Alloyed Aim to Advance AM in Japanese Market

NTT Data’s XAM Technologies, a company founded in 2020 that supports a broad range of services in additive manufacturing (AM), has entered into a collaborative project along with Alloyed, the...

Sandvik and BeamIT Bet Big on 3D Printing Superalloys and Aerospace

BeamIT is a leading Italian service bureau that is not only a large player, but also on the cutting edge of 3D printing technology. With a lot of aviation and...

Featured

Honeywell’s First Flight-Critical 3D Printed Engine Part Honeywell Earns FAA Certification

According to a report by SmarTech Analysis, dubbed “Opportunities in Additive Manufacturing for Civil Aviation Parts Production, 2019-2029“, the aerospace industry “has seen larger than ever before investments in AM...

QuesTek Innovations Wins US Air Force-America Makes 3D Printing Challenge

QuesTek Innovations has won the Macroscale Structure-to-Properties Predictions portion of an intensive four-part AFRL AM Modeling Challenge Series sponsored by the Air Force Research Laboratory (AFRL) and America Makes. Founded in 2012,...


Shop

View our broad assortment of in house and third party products.