Wood fiber - sodium silicate mixtures for additive manufacturing of composite materials

Orji, Berlinda O.; Thie, Conal; Baker, Kenneth R.; Maughan, Michael R.; McDonald, Armando G.

doi:10.1007/s00107-022-01861-z

Cited by 6 publications

(12 citation statements)

References 77 publications

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“…The flow curves for the WSSC blends (0.05–50 Hz) generally followed previously published results. 41 When the wood ratio was too low the WSSC was unable to be compressed and travel through the hose. When the wood ratio was too high, the WSSC viscosity was too low, leading to high pressures which caused the fittings to fail.…”

Section: Discussionmentioning

confidence: 99%

“…47 The flexural test results obtained in this study revealed that curing affects the WSSC flexural strength. Orji et al 41 established that the curing process significantly influenced the mechanical properties of WSSC. Alchaar and Al-Tamimi 9 also reported similar curing effects on the mechanical properties of 3D printed concrete.…”

Section: Discussionmentioning

confidence: 99%

“…Friction between the WSSC and the inside of the barrel generated a significant amount of heat, so a cooling system was added to the exterior of the barrel. 41…”

Section: Methodsmentioning

confidence: 99%

“…Friction between the WSSC and the inside of the barrel generated a significant amount of heat, so a cooling system was added to the exterior of the barrel. 41 A 76.2 mm diameter steel pipe was welded over the barrel and fitted with inlet and outlet fittings to function as a counter-flow heat exchanger. An aquarium pump was used to circulate room temperature water from a tank through the exchanger at approximately 272.7 L/h.…”

Section: Screw Extrusion Systemmentioning

confidence: 99%

“…The specific process of material deposition 3D printing with high content wood residues combined with thermosets has also not been widely explored. Orji et al 41 investigated the flow properties and curing behaviors of wood-sodium silicate (SS) mixtures at different compositions (50% wood:50% SS and 60% wood:40% SS) for their rheological suitability for AM. SS is inexpensive to produce and possess excellent physico-chemical and mechanical properties, including high strength, micro- or nano-porosity, negligible shrinkage, thermal stability, high surface hardness, fire, and chemical resistance.…”

Section: Introductionmentioning

confidence: 99%

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A screw extrusion-based system for additive manufacturing of wood: Sodium silicate thermoset composites

Carne,

Alade,

Orji

et al. 2023

Advances in Mechanical Engineering

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The aims of this work were to investigate the printability of high-fraction wood and sodium-silicate composites (WSSC) for additive manufacturing and to develop a screw extrusion-based process to demonstrate this approach for building construction applications. A custom additive manufacturing system was fabricated, and mixtures of 40%–60% wood fiber and 60%–40% sodium silicate were printed. The printability of these formulations was determined by observing their viscosity, extrudability, print-bed and layer adhesion, and curing characteristics. Fiber to resin ratios of 45:55 to 50:50 were the most suitable for printing. The printability was also affected by printing temperature and nozzle travel speed. The mechanical properties of printed and cured WSSC, were determined by three-point bending, tensile, and compression testing. Tensile strength, bending strength, and elastic modulus were found to be comparable to those of 3D printed concrete and other wood-plastic composites reported in the literature. The WSSC was successfully printed into a panel indicating promise for use in additive manufacturing.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…Friction between the WSSC and the inside of the barrel generated a significant amount of heat, so a cooling system was added to the exterior of the barrel. 41…”

Section: Methodsmentioning

confidence: 99%

Section: Screw Extrusion Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations