Fluidity of methyl cellulose-contained suspensions and pastes prepared from differently milled Al2O3 powder

Sato, Katsuya; Hotta, Yuji; Yılmaz, Hüseyin; Sato, Kosuke

doi:10.1016/j.jcis.2008.11.018

Cited by 9 publications

(6 citation statements)

References 21 publications

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“…Some isolated polycrystalline nanometric agglomerates were also observed in these powders (Figure 3(f)) but were absent in the powder milled under acidic pH condition. Similar coatings of low density aluminum trihydroxides were also observed in ball milled -alumina powders in other studies [33][34][35]. These results confirm that hydration occurs on the surface of alumina particles, in a process that is intensified under milling.…”

Section: Starting and Milled Powderssupporting

confidence: 88%

Effects of Milling pH and Hydrothermal Treatment on Formation of Nanostructured Boehmite Binder for Alumina Extrusion

Lima

Tercini

Santos

et al. 2017

Journal of Nanomaterials

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The in situ formation of nanostructured aluminum hydroxides on the surface of alumina particles, which can work as inorganic binder, was reported in this paper. The effect of the suspension pH during milling of alumina powder and subsequent hydrothermal treatment for the hydroxide formation and microstructure was depicted. Under acidic pH condition, the formation of hydroxides was not observed. When the pH of suspension changed from acidic to basic during milling, bayerite [Al(OH) 3 ] nanoparticles were formed, but only a fraction of this hydroxide was converted to boehmite (AlOOH) during subsequent hydrothermal treatment. The aluminum hydroxide and oxyhydroxide formed in this condition improved the smoothness of extruded rods and the strength of presintered segments. For the powder milled under basic pH condition, the mechanochemically formed bayerite was completely converted into boehmite nanoparticles during the hydrothermal treatment. The presence of boehmite nanoparticles contributed to improving plasticity during extrusion, which allowed the reduction of organic binder and increased the strength of presintered alumina rods.

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Section: Starting and Milled Powderssupporting

confidence: 88%

Effects of Milling pH and Hydrothermal Treatment on Formation of Nanostructured Boehmite Binder for Alumina Extrusion

Lima

Tercini

Santos

et al. 2017

Journal of Nanomaterials

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Section: Introductionmentioning

confidence: 99%

“…Thus, development of pretreatment methods that increase the material digestibility for the subsequent enzymatic hydrolysis becomes a focus in this research field. Hence, a myriad of different pretreatment methods have been reported to remove lignin and hemicellulose, reduce cellulose crystallinity, and change chemical groups, for instance, milling, 1,2 dilute acid, 3 steam explosion, 4 liquid hot water, dilute lye, wet oxidation, and ammonia fiber explosion (AFEX), and so on. 5−7 A microwave-assisted dilute lye (MAL) pretreatment that can effectively improve the enzymatic saccharification of rice straw has been studied, 8,9 and the pretreatment conditions were optimized by response surface methodology and a Box− Benhnken Design.…”

Section: Introductionmentioning

confidence: 99%

Structure and Saccharification of Rice Straw Pretreated with Microwave-Assisted Dilute Lye

Fenghe

Yao

et al. 2012

Ind. Eng. Chem. Res.

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Surface characteristics of untreated and microwave-assisted dilute lye (MAL) treated rice straw have been investigated using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD). Rice straw composition was investigated by lignocelluloses determination. FTIR showed MAL treatment could effectively remove lipophilic extractives from the rice straw surface and break hydrogen bonds in the rice straw, and it was proven that more cellulose was exposed by MAL-treated with SEM. The composition analysis result indicated that the content of cellulose is 46.8% and content of lignin is 8.3% in rice straw with high-fire-power microwave-assisted 1% dilute lye for 1 h, and saccharification rate is 86% with high-fire-power microwave-assisted 1% dilute lye for 2 h.

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“…More recently, we investigated the boundary between slurry and paste by using wet-jet milled Al 2 O 3 particles and methyl cellulose of non-chain polymer as an organic binder. 22) As a result, the viscosity of slurries composed of wet-jet milled Al 2 O 3 particles and nonchain polymer as methyl cellulose became low as compared to ball-milled ones. Thus, it was found that the interaction of Al 2 O 3 particle and methyl cellulose of non-chain polymer was affected by milling system.…”

Section: )22)mentioning

confidence: 99%

Rheological behaviors of ball-milled and wet-jet milled ZnO slurries with polyvinyl alcohol as an organic binder

Sato

Hotta

2011

J. Ceram. Soc. Japan

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Fluidity of wet-jet milled and ball-milled ZnO slurries containing polyvinyl alcohol (PVA) was investigated from rheological behaviors and centrifugal separation. The viscosities of wet-jet milled ZnO slurries were much small as compared to ball-milled ones irrespective of the solids loading and PVA contents. At 30 vol % of high solids loading, the viscosity of wet-jet milled slurry with PVA was decreased to one-ninth of ball-milled one. From the creep-recovery measurements, the ball-milled slurry with PVA showed the elastic property, while the wet-jet milled one with PVA showed the liquid-like property. Therefore, the fluidity of wet-jet milled ZnO slurry with PVA was much higher than that of ball-milled one, indicating that the adsorption affinity between wet-jet milled particle and PVA was weak as compared to ball-milled one with PVA. From the centrifugal separation test, it was found that the relative packing densities of the precipitates prepared from wet-jet milled particles was high as compared to those prepared from ball milled ones due to the difference of adsorption affinity. Hence, the fabrication of weak adsorption affinity between ZnO particle and PVA leads to high fluidity of high solids loaded slurries with an organic binder like a chain polymer.

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Fluidity of methyl cellulose-contained suspensions and pastes prepared from differently milled Al2O3 powder

Cited by 9 publications

References 21 publications

Effects of Milling pH and Hydrothermal Treatment on Formation of Nanostructured Boehmite Binder for Alumina Extrusion

Effects of Milling pH and Hydrothermal Treatment on Formation of Nanostructured Boehmite Binder for Alumina Extrusion

Structure and Saccharification of Rice Straw Pretreated with Microwave-Assisted Dilute Lye

Rheological behaviors of ball-milled and wet-jet milled ZnO slurries with polyvinyl alcohol as an organic binder

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