Binder stabilization and rheology optimization for vat-photopolymerization 3D printing of silica-based ceramic mixtures

Ozkan, Basar; Sameni, Farzaneh; Karmel, Sarah; Engstrøm, Daniel S.; Sabet, Ehsan

doi:10.1016/j.jeurceramsoc.2022.11.032

Cited by 14 publications

(7 citation statements)

References 48 publications

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“…Therefore, the degradation chemistry of reactants and the mass transport process are critical factors while designing the binder formulation, which requires a delicate balance between the volatilisation (pyrolysis rate) of organic compounds and their removal rates to avoid the formation of defects or cracks. Although the addition of oligomer suppresses the degradation rate of monomers (hence, early pore development), relieving high-pressure build-up within the porous body, it is difficult to control the thermal degradation of NVP compound with various additions discussed for different applications [ 20 , 23 ]. To this extend, the binder mixtures with varying concentrations of NVP were subjected to TGA to understand the impact of NVP on the thermal stability of ceramic parts.…”

Section: Resultsmentioning

confidence: 99%

“…As the Z-axis would be considered the height of the printed part, tensile strength is weaker along the Z-axis, especially in more elevated printed ceramic parts. Low green strength can affect the part’s ability to hold shape during printing and generate cracks under high peeling forces [ 23 ]. Low strength can also split interlayer bonding regions and crack under thermal stress while sintering [ 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

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A Systematic Study on Impact of Binder Formulation on Green Body Strength of Vat-Photopolymerisation 3D Printed Silica Ceramics Used in Investment Casting

Basar,

Veliyath,

Tarak

et al. 2023

Polymers

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Additive ceramics manufacturing with vat-photopolymerisation (VP) is a developing field, and the need for suitable printing materials hinders its fast growth. Binder mixtures significantly influence the mechanical properties of printed ceramic bodies by VP, considering their rheological properties, curing performances and green body characteristics. Improving mechanical characteristics and reducing cracks during printing and post-processes is mainly related to binder formulations. The study aims to develop a binder formulation to provide the printed ceramic specimens with additional green strength. The impact on mechanical properties (ultimate tensile strength, flexural strength, Young’s and strain at breakpoint), viscosity and cure performance of Urethane Acrylate (UA) and thermoplastic Polyether Acrylate (PEA) oligomers to monofunctional N-Vinylpyrrolidone (NVP), 1,6-Hexanediol Diacrylate (HDDA) and Tri-functional Photocentric 34 (PC34) monomers were investigated under varying concentrations. The best mechanical characteristic was showcased when the PC34 was replaced with 20–30 wt.% of UA in the organic medium. The Thermogravimetric Analysis (TGA) and sintering test outcomes revealed that increasing the content of NVP in the organic medium (above 15 wt.%) leads to uncontrolled thermal degradation during debinding and defects on ceramic parts after sintering. The negative effect of UA on the viscosity of ceramic-loaded mixtures was controlled by eliminating the PC34 compound with NVP and HDDA, and optimum mechanical properties were achieved at 15 wt.% of NVP and 65 wt.% of HDDA. PEA is added to provide additional flexibility to the ceramic parts. It was found that strain and other mechanical parameters peaked at 15 wt.% of PEA. The study formulated the most suitable binder formulation on the green body strength of printing silica ceramics as 50 wt.% HDDA, 20 wt.% Urethane Acrylate, 15 wt.% NVP and 15 wt.% PEA.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Systematic Study on Impact of Binder Formulation on Green Body Strength of Vat-Photopolymerisation 3D Printed Silica Ceramics Used in Investment Casting

Basar,

Veliyath,

Tarak

et al. 2023

Polymers

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“…The experimental results showed that the particle sizes significantly influence some parameters that characterize the manufacturing conditions of 3D printing ceramic materials. Okzan et al considered the possibilities of manufacturing by 3D printing some components from ceramic materials of turbine blades [ 15 ]. They have developed a technology that allows manufacturing in complex economic conditions using cost-effective LCD printers.…”

Section: Introductionmentioning

confidence: 99%

Compressive Behavior of Some Balls Manufactured by 3D Printing from Ceramic–Polymer Composite Materials

Hrițuc,

Ermolai,

Mihalache

et al. 2024

Micromachines

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It is known that ceramic–polymer composite materials can be used to manufacture spherical bodies in the category of balls. Since balls are frequently subjected to compression loads, the paper presents some research results on the compression behavior of balls made of ceramic composite materials with a polymer matrix. The mathematical model of the pressure variation inside the balls highlights the existence of maximum values in the areas of contact with other parts. Experimental research was carried out on balls with a diameter of 20 mm, manufactured by 3D printing from four ceramic–polymer composite materials with a polymer matrix: pottery clay, terracotta, concrete, and granite. The same ceramic–polymer composite material was used, but different dyes were added to it. A gravimetric analysis revealed similar behavior of the four materials upon controlled heating. Through the mathematical processing of the experimental results obtained by compression tests, empirical mathematical models of the power-type function type were determined. These models highlight the influence exerted by different factors on the force at which the initiation of cracks in the ball materials occurs. The decisive influence of the infill factor on the size of the force at which the cracking of the balls begins was found.

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“…Dispersants can uniformly disperse inorganic or organic particles in a dispersion medium and stabilize the suspension by hindering the agglomeration of particles. Dispersants have been broadly used as a common type of surfactant in multiple applications, including but not limited to pigments, [1] inks, [2] cosmetics, [3] ceramics, [4] medicine, [5] and concrete [6] . The quality and performance of the product in the abovementioned fields are directly affected by the application of the dispersant [7–10] …”

Section: Introductionmentioning

confidence: 99%

Preparation and Utilization of a Comb‐Like Polycarboxylate Dispersant for Organic Pigment

Cao,

Cai,

Huang

et al. 2023

ChemistrySelect

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As a novel form of carboxylate comb‐like copolymers, SAM‐(m)PEG was prepared by polymerizing styrene (S), acrylic (A), and maleic anhydride (M) to obtain a random copolymer labeled SAM. SAM was then esterified using either polyethylene glycol (PEG) or methyl PEG (mPEG), a waterborne polymer dispersant for dispersing and stabilizing C.I. Pigment Yellow 180 (PY 180). The structures of SAM‐(m)PEG and the ground suspension of PY 180 were characterized by Fourier transform infrared (FT‐IR) spectroscopy, nuclear magnetic resonance (NMR) spectroscopy, scanning electron microscopy (SEM), a nanoparticle size analysis, and viscometry. The effects of different branch chains, synthetic formulas, and grinding conditions on the dispersibility of SAM‐(m)PEG were evaluated. In addition, the optical properties of the pigments were investigated after ultrafine grinding. The adsorption mechanism between the SAM‐(m)PEG dispersants and PY 180 particles is also discussed. SAM‐PEG6002 outperformed the other SAM‐(m)PEG dispersants owing to its excellent dispersion and stability. When used as the dispersant, the average particle size (Z‐average) of PY 180 after grinding was 264.6 nm, and the particle size distribution became narrow (PDI=0.089). Moreover, SAM‐PEG6002 effectively maintained the color performance of the pigment, and the product was successfully applied to the pigment coating. Therefore, SAM‐PEG6002 is an effective waterborne polymer dispersant for organic pigments.

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Binder stabilization and rheology optimization for vat-photopolymerization 3D printing of silica-based ceramic mixtures

Cited by 14 publications

References 48 publications

A Systematic Study on Impact of Binder Formulation on Green Body Strength of Vat-Photopolymerisation 3D Printed Silica Ceramics Used in Investment Casting

A Systematic Study on Impact of Binder Formulation on Green Body Strength of Vat-Photopolymerisation 3D Printed Silica Ceramics Used in Investment Casting

Compressive Behavior of Some Balls Manufactured by 3D Printing from Ceramic–Polymer Composite Materials

Preparation and Utilization of a Comb‐Like Polycarboxylate Dispersant for Organic Pigment

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