Effects of process variables on the yield stress of rheologically modified biomass
Additives that alter the rheology of lignocellulosic biomass suspensions were tested under conditions of variable pH, temperature, and solid concentration. The effects of certain ions, biomass type, and time after the addition of rheological modifier were also examined. Torque and vane rheometry wer...
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| Veröffentlicht in: | Rheologica acta 2015-12, Vol.54 (11-12), p.941-949 |
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| container_title | Rheologica acta |
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| creator | Samaniuk, Joseph R. Scott, C. Tim Root, Thatcher W. Klingenberg, Daniel J. |
| description | Additives that alter the rheology of lignocellulosic biomass suspensions were tested under conditions of variable pH, temperature, and solid concentration. The effects of certain ions, biomass type, and time after the addition of rheological modifier were also examined. Torque and vane rheometry were used to measure the yield stress of samples. It was found that the effectiveness of rheological modifiers depends on pH over a range of 1.5 to 6, biomass type, concentration of certain ions, and time after addition. The time-dependent properties of rheologically modified biomass are sensitive to the type of rheological modifier, and also to mixtures of these additives, which can result in unexpected behavior. We show that time-dependent rheology is not correlated with time-dependent changes of the water-soluble polymer (WSP) in the aqueous environment, such as slow polymer hydration, suggesting that time-dependent changes in the polymer-fiber interaction may play a more significant role. |
| doi_str_mv | 10.1007/s00397-015-0884-5 |
| format | Article |
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We show that time-dependent rheology is not correlated with time-dependent changes of the water-soluble polymer (WSP) in the aqueous environment, such as slow polymer hydration, suggesting that time-dependent changes in the polymer-fiber interaction may play a more significant role.</description><identifier>ISSN: 0035-4511</identifier><identifier>EISSN: 1435-1528</identifier><identifier>DOI: 10.1007/s00397-015-0884-5</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Additives ; Aqueous environments ; Biomass ; Characterization and Evaluation of Materials ; Chemistry and Materials Science ; Complex Fluids and Microfluidics ; Food Science ; Lignocellulose ; Materials Science ; Mechanical Engineering ; Original Contribution ; Polymer Sciences ; Polymers ; Process variables ; Rheological properties ; Rheology ; Rheometry ; Soft and Granular Matter ; Time dependence ; Water soluble polymers ; Yield strength ; Yield stress</subject><ispartof>Rheologica acta, 2015-12, Vol.54 (11-12), p.941-949</ispartof><rights>Springer-Verlag Berlin Heidelberg 2015</rights><rights>Rheologica Acta is a copyright of Springer, (2015). 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Tim</creatorcontrib><creatorcontrib>Root, Thatcher W.</creatorcontrib><creatorcontrib>Klingenberg, Daniel J.</creatorcontrib><title>Effects of process variables on the yield stress of rheologically modified biomass</title><title>Rheologica acta</title><addtitle>Rheol Acta</addtitle><description>Additives that alter the rheology of lignocellulosic biomass suspensions were tested under conditions of variable pH, temperature, and solid concentration. The effects of certain ions, biomass type, and time after the addition of rheological modifier were also examined. Torque and vane rheometry were used to measure the yield stress of samples. It was found that the effectiveness of rheological modifiers depends on pH over a range of 1.5 to 6, biomass type, concentration of certain ions, and time after addition. The time-dependent properties of rheologically modified biomass are sensitive to the type of rheological modifier, and also to mixtures of these additives, which can result in unexpected behavior. 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Tim</au><au>Root, Thatcher W.</au><au>Klingenberg, Daniel J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of process variables on the yield stress of rheologically modified biomass</atitle><jtitle>Rheologica acta</jtitle><stitle>Rheol Acta</stitle><date>2015-12-01</date><risdate>2015</risdate><volume>54</volume><issue>11-12</issue><spage>941</spage><epage>949</epage><pages>941-949</pages><issn>0035-4511</issn><eissn>1435-1528</eissn><abstract>Additives that alter the rheology of lignocellulosic biomass suspensions were tested under conditions of variable pH, temperature, and solid concentration. The effects of certain ions, biomass type, and time after the addition of rheological modifier were also examined. Torque and vane rheometry were used to measure the yield stress of samples. 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| subjects | Additives Aqueous environments Biomass Characterization and Evaluation of Materials Chemistry and Materials Science Complex Fluids and Microfluidics Food Science Lignocellulose Materials Science Mechanical Engineering Original Contribution Polymer Sciences Polymers Process variables Rheological properties Rheology Rheometry Soft and Granular Matter Time dependence Water soluble polymers Yield strength Yield stress |
| title | Effects of process variables on the yield stress of rheologically modified biomass |
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