2012 Fiscal Year Final Research Report
Development of a slurry preparation method for high-performance and efficiency in continuous filtration
| Project/Area Number |
22360385
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Recycling engineering
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| Research Institution | Nagoya Industrial Science Research Institute (2012)
Nagoya University (2010-2011) |
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Principal Investigator |
TSUBAKI Junichiro 公益財団法人名古屋産業科学研究所, その他部局等, 研究員 (50109295)
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| Co-Investigator(Kenkyū-buntansha) |
MORI Takamasa 名古屋大学, 大学院・工学研究科, 助教 (20345929)
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| Project Period (FY) |
2010 – 2012
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| Keywords | ナノ粒子 / クロスフロー濾過 |
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| Research Abstract |
We found that the particles in the slurry can agglomerate by adding larger amount of polyelectrolyte dispersant compared to that needed to attain well dispersion. Thus, the dependency of initial particle concentration on the agglomeration and its mechanism in slurry prepared by adding excess polyelectrolytes was experimentally discussed. It was shown that agglomeration behavior strongly depends on the additive amount of polyelectrolytes, not on the polyelectrolyte concentration in the solution. It was also found that the dominant factor of agglomeration in slurry prepared by adding extra polyelectrolytes should be the compression of the electrical double layer by the increased counter ion concentration, not by the so called depletion effect or by pH change. Interestingly, the final sediment had a relatively high packing fraction and good flowability in the case of the agglomerated slurry with extra polyelectrolytes compared to that of the agglomerated slurry with an additional NaC1 solution.
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