Rheological behavior of corn and soy mix as feed ingredients

Fraiha, Marcos; Biagi, J. D.; Ferraz, Antônio Carlos de Oliveira

doi:10.1590/s0101-20612011000100018

Cited by 22 publications

(17 citation statements)

References 15 publications

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“…The n power-law index values were 0.57, 0.39, 0.21 and −0.24, respectively. In the latter case, a negative index was quite surprising but could be attributed to slip effects along the MiniLab walls (Fraiha et al, 2011). However, the rise of consistency value as the decrease of power-law index showed the difficulties for the blends to flow at high fibre concentrations.…”

Section: Composites Processingmentioning

confidence: 94%

Twin-screw extrusion impact on natural fibre morphology and material properties in poly(lactic acid) based biocomposites

Gamon

Evon

Rigal

2013

Industrial Crops and Products

120

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. b s t r a c tNatural fibres from miscanthus and bamboo were added to poly(lactic acid) by twin-screw extrusion. The influence of extruder screw speed and of total feeding rate was studied first on fibre morphology and then on mechanical and thermal properties of injected biocomposites. Increasing the screw speed from 100 to 300 rpm such as increasing the feeding rate in the same time up to 40 kg/h helped to preserve fibre length. Indeed, if shear rate was increased with higher screw speeds, residence time in the extruder and blend viscosity were reduced. However, such conditions doubled electrical energy spent by produced matter weight without significant effect on material properties. The comparison of four bamboo grades with various fibre sizes enlightened that fibre breakages were more consequent when longer fibres were added in the extruder. Longer fibres were beneficial for material mechanical properties by increasing flexural strength, while short fibres restrained material deformation under heat by promoting crystallinity and hindering more chain mobility.

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Section: Composites Processingmentioning

confidence: 94%

Twin-screw extrusion impact on natural fibre morphology and material properties in poly(lactic acid) based biocomposites

Gamon

Evon

Rigal

2013

Industrial Crops and Products

120

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“…The possible reasons that they suggested were molecular degradation of sample, viscous dissipation, fluid slip, etc. Fraiha et al [25] also found that the mixture of ground corn and soybean grains exhibited shear thinning behavior with negative n value at certain condition. The possible reasons of negative n values for samples in current work could be the viscous dissipation and fluid slip.…”

Section: Resultsmentioning

confidence: 93%

Rheological properties of reactive extrusion modified waxy starch and waxy starch-polyacrylamide copolymer gels

Finkenstadt

2013

Starch - Stärke

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The rheological properties of modified waxy starch and waxy starch–polyacrylamide graft copolymers prepared by reactive extrusion were investigated. Both materials can absorb huge amount of water and form gels. The modified waxy starch and waxy starch–polyacrylamide graft copolymer gels all exhibited viscoelastic solid properties. The waxy starch–polyacrylamide graft copolymer gels with the concentration ≤10% showed weaker viscoelastic behaviors than those of the same concentrations of modified waxy starch gels. However, at concentration ≥11.25%, the waxy starch–polyacrylamide graft copolymer gels displayed much stronger viscoelastic properties than those of the same concentrations of modified waxy starch gels. The analysis of modulus and concentration dependence and stress relaxation measurements indicated that both modified waxy starch and waxy starch–polyacrylamide graft copolymer gels were physical gels meaning the cross‐linkers between the molecules were physical junctions. The nonlinear steady shearing rheological properties studies indicated that both modified waxy starch and waxy starch–polyacrylamide graft copolymer gels exhibited shear thinning behavior, which can be well fitted with the power law constitutive equation. The function and behavior of the modified waxy starch and waxy starch–polyacrylamide graft copolymer gels suggest that these starch‐based biomaterials should be potential candidates for applications in cosmetic gels, wound skin care materials, and agricultural products.

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“…Therefore, the viscosity (μ) parameter in the equations was replaced by an apparent viscosity () term. The apparent viscosity model of corn and soybean mixture melt (likely feed ingredients to be extruded) published by Fraiha et al [27] (a form of power law equation for pseudoplastic fluid) is:…”

Section: Capacity Of the Extrudermentioning

confidence: 99%

Single-Screw Laboratory Extruder for Production of Expanded Products: Design, Construction and Performance Testing

Abioye¹,

Olajide²,

Ngoddy³

2019

JAST-B

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In this study, a low-capacity single-screw cooking extruder for the manufacture of expanded snacks was designed based on theoretical models and guided operating data and practices of existing cooking extruders. Construction was carried out using locally available engineering materials in modest machine shops satisfying sanitary design criteria and tested using blends of cassava and defatted soybean flour. The extruder developed has throughput, screw speed, barrel diameter, length-to-diameter ratio and power requirement of 13.0 kg/h, 200 rpm, 40 mm, 12 and 1.908 kW, respectively. The cost of the extruder developed was estimated N650,000 in 2016. Extrudates had expansion ratio and trypsin inhibitor reduction which ranged from 1.82 to 2.98 and 61.07% to 87.93%, respectively, across all treatments. This study demonstrates that a low-capacity and affordable experimental single-screw extruder can be designed and built domestically which can be scaled-up for pilot and industrial applications for the production of expanded snacks.

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Rheological behavior of corn and soy mix as feed ingredients

Cited by 22 publications

References 15 publications

Twin-screw extrusion impact on natural fibre morphology and material properties in poly(lactic acid) based biocomposites

Twin-screw extrusion impact on natural fibre morphology and material properties in poly(lactic acid) based biocomposites

Rheological properties of reactive extrusion modified waxy starch and waxy starch-polyacrylamide copolymer gels

Single-Screw Laboratory Extruder for Production of Expanded Products: Design, Construction and Performance Testing

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