Controlled directionality in 3D printing of graphite-reinforced polymer composite with enhanced mechanical properties

Das, Manojit; Mishra, Rajat; Das, Palash; Kashyap, Sunil Kumar; Panda, Sushanta Kumar; Mitra, Rahul; Owuor, Peter Samora; Arora, Amit; Tiwary, Chandra Sekhar

doi:10.1016/j.compscitech.2023.109955

Cited by 11 publications

(2 citation statements)

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“…Additive manufacturing/three-dimensional (3D) printing techniques, such as direct ink writing (DIW), can be employed to fabricate well-aligned, uniformly distributed, and defect-free CMC-based composites with controlled architecture. 18,19 Here, we demonstrate the DIW of CMC reinforced with 2D hBN. The impact of CMC reinforcement using 2D hBN on hBN/CMC ink rheology and its suitability for 3D printing were evaluated.…”

Section: ■ Introductionmentioning

confidence: 58%

“…The mechanical and functional properties of the composites are highly dependent on volume fraction, distribution, and alignment of the 2D material reinforcement. Additive manufacturing/three-dimensional (3D) printing techniques, such as direct ink writing (DIW), can be employed to fabricate well-aligned, uniformly distributed, and defect-free CMC-based composites with controlled architecture. , …”

Section: Introductionmentioning

confidence: 99%

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Energy Harvesting Using High-Strength and Flexible 3D-Printed Cellulose/Hexagonal Boron Nitride Nanosheet Composites

Jayakumar,

Ambekar,

Mahapatra

et al. 2023

ACS Appl. Nano Mater.

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As a natural polymer, cellulose is abundant, low-cost, robust, and biodegradable and can be chemically modified. This work explores the enhancement of mechanical, thermal, and flexoelectric properties of three-dimensional (3D)-printed carboxymethyl cellulose (CMC) due to the addition of mechanically exfoliated hexagonal boron nitride (hBN). hBN was observed to act as a rheology modifier, and CMC reinforced with 2% hBN exhibited the maximum apparent viscosity of 12.24 Pa•s at a shear rate of 100 s −1 . The 0.5% hBN/CMC film exhibited the highest mechanical and thermal stability. A flexoelectric energy harvester was fabricated out of 3D-printed hBN/CMC composites to test the effectiveness of strain-induced charge production. By varying the load resistance and applied pressure, we were able to measure the voltage and current flowing through the device. We found that a load resistance of 180 kΩ connected across a 2% hBN/CMC device resulted in the highest power delivery of 5.5 nW. When mechanical strain is applied, a charge state fluctuation and spontaneous polarization in the hBN/CMC matrix are seen. This phenomenon can be explained based on the flexoelectric energy-harvesting mechanism, supported by density functional theory (DFT) calculations.

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Section: ■ Introductionmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 99%