Characterization of Products Using Additive Manufacturing with Graphene/Photopolymer-Resin Nano-Fluid

Lim, Su-yeong; Shin, Bo Sung; Kim, Kyungmok

doi:10.1166/jnn.2017.14159

Cited by 17 publications

(8 citation statements)

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“…The weights of The cure depth value of the 0.5 wt.% graphene-reinforced resin showed a sharp decrease compared with the neat resin without graphene. This observation indicates that the printability of the resin will decrease with the increasing amount of graphene, which is believed to be due to the existence of graphene interfering with the photocuring process of the resin [30,31].…”

Section: Thermal Characterizationmentioning

confidence: 94%

Fabrication of Graphene-Reinforced Nanocomposites with Improved Fracture Toughness in Net Shape for Complex 3D Structures via Digital Light Processing

Feng

Xin

et al. 2019

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A solvent-free method to fabricate graphene-reinforced nanocomposites in net shape via digital light processing (DLP) 3D printing has been developed in this work. The effect of graphene nanofillers on resin viscosity and wettability for various printing parameters has been examined, with a systematic characterization of the mechanical and thermomechanical properties. With the addition of 0.5 wt.% graphene nanoplatelets in the resin, the flexural modulus and fracture toughness have been improved by 14% and 28% from neat resin, respectively. Thermomechanical properties of graphene-reinforced nanocomposites were also enhanced compared with the neat resin, without scarification in their printability. The feasibility of utilizing the DLP method to fabricate a fracture toughness specimen (KIC test) without complex skill-dependent notch preparation steps was explored, with different notch tip angles printed for net-shaped specimens. This provided a simple and versatile way to perform a quick examination of reinforcing efficiency from nanofillers at very low cost with high resolution and reproducibility. To demonstrate the suitability of current resins for complexly shaped structures, a gyroid scaffold for tissue engineering applications based on current graphene nanocomposite resins has been successfully fabricated via DLP, showing the great potential of current photocurable resins for applications in various fields such as tissue engineering or personalized medical devices without the cost barriers of traditional methods.

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Section: Thermal Characterizationmentioning

confidence: 94%

Fabrication of Graphene-Reinforced Nanocomposites with Improved Fracture Toughness in Net Shape for Complex 3D Structures via Digital Light Processing

Feng

Xin

et al. 2019

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“…This enables them as potential candidates for different applications such as dissipative materials [26] or sensors [27]. However, carbon-based additives absorb and scatter the UV light of the laser during the printing process, leading to materials with decreased mechanical properties, so the nanocomposite resin precursor must be carefully prepared [28]. These considerations are critical for the proper design of new materials, since understanding the curing process during 3D printing and its correlation with the macroscopic properties are critical aspects to control the quality of the final printed parts [29].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Degree of Cure in the Bulk Properties of Graphite Nanoplatelets Nanocomposites Printed via Stereolithography

León

Molina

2020

Polymers

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In this work, we report on the fabrication via stereolithography (SLA) of acrylic-based nanocomposites using graphite nanoplatelets (GNPs) as an additive. GNPs are able to absorb UV–Vis radiation, thus blocking partial or totally the light path of the SLA laser. Based on this, we identified a range of GNP concentrations below 2.5 wt %, where nanocomposites can be successfully printed. We show that, even though GNP is well-dispersed along the polymeric matrix, nanocomposites presented lower degrees of cure and therefore worse mechanical properties when compared with pristine resin. However, a post-processing at 60 °C with UV light for 1 h eliminates this difference in the degree of cure, reaching values above 90% in all cases. In these conditions, the tensile strength is enhanced for 0.5 wt % GNP nanocomposites, while the stiffness is increased for 0.5–1.0 wt % GNP nanocomposites. Finally, we also demonstrate that 2.5 wt % GNP nanocomposites possess characteristic properties of semiconductors, which allows them to be used as electrostatic dispersion materials.

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“…However, literatures on graphene/FLG/GNP-reinforced polymer via SLA are still few [43] and graphene oxide (GO) is more commonly seen since the functional groups attached to GO make it easier to be dispersed in polymer matrix [44] and GO has good biocompatibility [45]. Manapat et al [44] made use of the metastable, temperaturedependent characteristic of GO to improve the mechanical properties of 3D-printed commercial resin by SLA and acetone was used to disperse GO.…”

Section: Introductionmentioning

confidence: 99%

“…It was found out that GO induced chondrogenic differentiation of human bone marrow mesenchymal stem cells (hMSCs), resulting in the promotion of glycosaminoglycan and collagen levels. Lim et al [43] investigated a graphene/photopolymer resin via SLA, and Tween20 was added to disperse graphene in photopolymer resin. In order to disperse graphene in polymer, an extra solvent was usually added and this may influence the curing degree of resin.…”

Section: Introductionmentioning

confidence: 99%

Graphene-Reinforced Biodegradable Resin Composites for Stereolithographic 3D Printing of Bone Structure Scaffolds

Feng

Liu

et al. 2019

Journal of Nanomaterials

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A biodegradable UV-cured resin has been fabricated via stereolithography apparatus (SLA). The formulation consists of a commercial polyurethane resin as an oligomer, trimethylolpropane trimethacrylate (TEGDMA) as a reactive diluent and phenylbis (2, 4, 6-trimethylbenzoyl)-phosphine oxide (Irgacure 819) as a photoinitiator. The tensile strength of the three-dimensional (3D) printed specimens is 68 MPa, 62% higher than that of the reference specimens (produced by direct casting). The flexural strength and modulus can reach 115 MPa and 5.8 GPa, respectively. A solvent-free method is applied to fabricate graphene-reinforced nanocomposite. Porous bone structures (a jawbone with a square architecture and a sternum with a round architecture) and gyroid scaffold of graphene-reinforced nanocomposite for bone tissue engineering have been 3D printed via SLA. The UV-crosslinkable graphene-reinforced biodegradable nanocomposite using SLA 3D printing technology can potentially remove important cost barriers for personalized biological tissue engineering as compared to the traditional mould-based multistep methods.

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Characterization of Products Using Additive Manufacturing with Graphene/Photopolymer-Resin Nano-Fluid

Cited by 17 publications

References 0 publications

Fabrication of Graphene-Reinforced Nanocomposites with Improved Fracture Toughness in Net Shape for Complex 3D Structures via Digital Light Processing

Fabrication of Graphene-Reinforced Nanocomposites with Improved Fracture Toughness in Net Shape for Complex 3D Structures via Digital Light Processing

Influence of the Degree of Cure in the Bulk Properties of Graphite Nanoplatelets Nanocomposites Printed via Stereolithography

Graphene-Reinforced Biodegradable Resin Composites for Stereolithographic 3D Printing of Bone Structure Scaffolds

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