Fabrication of complex shaped ceramic articles from 3D printed polylactic acid templates by replication process

Mamatha, Sirisala; Biswas, Papiya; Das, Dibakar; Johnson, Roy

doi:10.1016/j.ceramint.2019.06.203

Cited by 16 publications

(4 citation statements)

References 13 publications

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“…To produce a homogeneous conductive coating on untreated 3D-printed thermoplastics (Figure 3a), such as polylactic acid (PLA), polyethylene terephthalate glycol (PETG), and thermoplastic polyurethane (TPU), a paint formulation comprised of PEDOT particles, trifluoroethanol (solvent) and polycaprolactone (thickener), is developed. The formulation obviates the need for a primer 39 because trifluoroethanol partially dissolves the thermoplastic, resulting in strong particle adhesion to a 3D-printed object. Trifluoroethanol's moderate evaporation rate (vapor pressure of 7 kPa at 20 °C) 40 facilitates the deposition of PEDOT and prevents particles from agglomerating during drying 41 (Figure 3b).…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Solution-Processable PEDOT Particles for Coatings of Untreated 3D-Printed Thermoplastics

Yang

Diao

et al. 2023

ACS Appl. Mater. Interfaces

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Lack of solution processability is the main bottleneck in research progression and commercialization of conducting polymers. The current strategy of employing a water-soluble dopant (such as PEDOT:PSS) is not feasible with organic solvents, thus limiting compatibility on hydrophobic surfaces, such as threedimensional (3D) printable thermoplastics. In this article, we utilize a colloidal dispersion of PEDOT particles to overcome this limitation and formulate an organic paint demonstrating conformal coating on 3D-printed objects. We start with synthesizing PEDOT particles that possess a low electrical resistance (gap resistance of 4.2 ± 0.5 Ω/mm). A particle-based organic paint is formulated and applied via brush painting. Coated objects show a surface resistance of 1 kΩ/cm, comparable to an object printed by commercial conductive filaments. The coating enables the fabrication of pH and strain sensors. Highly conductive PEDOT particles also absorb light strongly, especially in the near-infrared (NIR) range due to the high concentration of charge carriers on the polymer's conjugated backbones (i.e., polarons and bipolarons). PEDOT converts light to heat efficiently, resulting in a superior photothermal activity that is demonstrated by the flash ignition of a particle-impregnated cotton ball. Consequently, painted 3D prints are highly effective in converting NIR light to heat, and a 5 s exposure to a NIR laser (808 nm, 0.8 mW/cm 2 ) leads to a record hightemperature increase (194.5 °C) among PEDOT-based coatings.

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Section: ■ Materials and Methodsmentioning

confidence: 99%

Solution-Processable PEDOT Particles for Coatings of Untreated 3D-Printed Thermoplastics

Yang

Diao

et al. 2023

ACS Appl. Mater. Interfaces

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“…The carbon in PLA comes from the carbon dioxide in the atmosphere, which is immobilized in glucose through photosynthesis; therefore, carbon dioxide produced through its removal, incineration or biodegradation does not increase the total amount of carbon dioxide in the atmosphere [ 2 ]. The biocompatibility, bioresorbability and biodegradability of PLA [ 3 ] recommend this polymer as being suitable for biomedical and food packaging, bone tissue engineering, 3D-printed scaffold fabrication and surgical suturing [ 4 ], besides other applications including drug carrier agents [ 5 , 6 ], controlled-release drugs and orthopedic implants [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Filler Content on the Morphology and Physical Properties of Poly(Lactic Acid)-Hydroxyapatite Composites

et al. 2023

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The effect of hydroxyapatite (HAp) synthesized by the chemical precipitation process on the morphology and properties of composites based on poly(lactic acid) (PLA) was investigated at various filler content ratios, i.e., 5, 10 and 15 wt%. Both neat PLA and PLA-based composites were first prepared using the solvent casting method, followed by melt compounding in an internal mixer, whereas tensile specimens were obtained by thermo-compression. The study revealed that the addition of 5 wt% of HAp into the PLA led to a slight improvement in both the thermal stability and tensile properties of the composite material in comparison with neat PLA and other composite samples. Indeed, the values of the tensile strength and modulus increased from approximately 61 MPa and 2.9 GPa for the neat PLA to almost 64 MPa and 3.057 GPa for the composite sample, respectively. Moreover, the degradation temperature at a 5 wt% mass loss also increased by almost 5 °C compared to other samples, due probably to a finer dispersion of the HAp particles in the PLA, as observed under a scanning electron microscope. Furthermore, the FT-IR spectra displayed some changes in the chemical structure of the PLA/HAp (5 wt%), indicating the occurrence of filler-matrix interactions. At a higher filler content ratio, a decrease in the properties of the PLA/HAp composites was observed, being more pronounced at 15 wt%. The PLA composite containing 5 wt% HAp presents the best compromise among the investigated properties. The study highlighted the possibility of using HAp without any prior surface treatment as a reinforcement in PLA composite materials.

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“…PLA has received a lot of attention recently because of its excellent bioresorbability, improved biocompatibility, and biodegradability with nontoxic byproduct formation. PLA has a wide range of applications, including medical and food industries, such as antimicrobial product development, bone tissue engineering, 3D-printed scaffold fabrication, and surgical suturing, as well as drug carrier agents [19][20][21][22]. The only disadvantage of using PLA is its inability to facilitate cell attachment and proliferation due to its poor cellular attachment ability [23].…”

Section: Introductionmentioning

confidence: 99%

Additive manufacturing of bionanomaterials for biomedical applications based on TI6AL4V and PLA: a systematic review

et al. 2023

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Additive manufacturing (AM) is the owner of a huge potential as a manufacturing technology in fabricating functional implants, and scaffolds for biomedical applications. AM, which includes 3D printing (3DP) and 3D bioprinting, can be the solution to produce several needs such as scaffolds/implants, tissue or organs, or medical devices by combining different biomaterials with nanomaterials. Titanium and its alloys and Polylactic acid (PLA) are commonly used in bone tissue repair with their superior bio-functionality. The rapid advancement of three-dimensional (3D) printing technology has enabled the fabrication of porous titanium and polymer composite scaffolds with controllable microstructures, which is regarded as an effective method for promoting rapid bone repair. An electronic literature search was conducted in PubMed, Web of Science, Scopus, Elsevier, Embase, and other numerous databases up to December 2021 which are accessed by Karabuk university. To evaluate the possibility of bias and methodological quality, the SYRCLE tool and the last version of the CAMARADES list were used, respectively, a meta-analysis could not be performed. This systematic review is aimed to evaluate the common biomedical potential of 3D-printed porous Ti6Al4V (Ti64) and PLA matrix scaffold for repairing bone defects to investigate the influential factors that might affect its osteogenic availability. The most ideal parameters for designing the Ti64 scaffold were found to be a pore size of around 300-400 m and porosity of 60-70%, while PLA scaffolds show 350-400 m and nearly the same percentage in porosity as Ti64.

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Fabrication of complex shaped ceramic articles from 3D printed polylactic acid templates by replication process

Cited by 16 publications

References 13 publications

Solution-Processable PEDOT Particles for Coatings of Untreated 3D-Printed Thermoplastics

Solution-Processable PEDOT Particles for Coatings of Untreated 3D-Printed Thermoplastics

Effect of Filler Content on the Morphology and Physical Properties of Poly(Lactic Acid)-Hydroxyapatite Composites

Additive manufacturing of bionanomaterials for biomedical applications based on TI6AL4V and PLA: a systematic review

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