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  1. 生命環境系 (Faculty of Life and Environmental Sciences)
  2. 小林 幹佳 (Kobayashi Motoyoshi)
  1. コンテンツタイプ (Contents Type)
  2. 雑誌発表論文等 (Journal article, etc.)
  3. C~
  4. Colloids and surfaces. A, Physicochemical and engineering aspects

Affirmation of the effect of pH on shake-gel and shear thickening of a mixed suspension of polyethylene oxide and silica nanoparticles

http://hdl.handle.net/2241/00150156
95e09220-367f-4c31-9797-a5003373a8fa
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CSA_537.pdf CSA_537 (1.1 MB)
item type Journal Article(1)
公開日 2018-01-18
タイトル
タイトル Affirmation of the effect of pH on shake-gel and shear thickening of a mixed suspension of polyethylene oxide and silica nanoparticles
言語
言語 eng
資源タイプ
タイプ journal article
著者 Kawasaki, Shogo

× Kawasaki, Shogo

WEKO 180593

Kawasaki, Shogo

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Kobayashi, Motoyoshi

× Kobayashi, Motoyoshi

WEKO 180594

Kobayashi, Motoyoshi

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著者別名 小林, 幹佳

× 小林, 幹佳

WEKO 106753
e-Rad 20400179
筑波大学研究者総覧 0000003047

小林, 幹佳

Search repository
抄録
内容記述 The mixture of silica nanoparticles and polyethylene oxide (PEO) shows unique rheological behaviors, such as reversible gelation and shear thickening, when moderate shear is applied. These behaviors are attributed to the transient bridging network, which is formed via the simultaneous adsorption of a PEO chain onto multiple silica nanoparticles. The adsorption affinity depends on pH and thus, we expect that these behaviors change with pH. Nevertheless, the effect of pH on shake-gel behavior and shear thickening has not yet been systematically examined. In order to improve our understanding, we attempt to study the influence of pH and ionic strength on the relaxation time of the gel and the viscosity of the mixture. Our experimental results demonstrate that shake-gel and shear thickening can be observed in the pH range of 8.0–9.9. Moreover, the relaxation time required for the gel recovery to sol increases and the critical shear rate at which the viscosity begins to rise decreases as the pH decreases. Furthermore, we determined that irreversible shake-gels can be obtained in a narrow range of PEO concentrations at the pH of approximately 8.0. In conclusion, we determined that the relaxation time of gel is longer at low pH, and the critical shear rate decreases with the decrease in interparticle repulsion of silica.
書誌情報 Colloids and Surfaces A: Physicochemical and Engineering Aspects

巻 537, p. 236-242, 発行日 2018-01
ISSN
収録物識別子 09277757
書誌レコードID
収録物識別子 AA10892561
DOI
関連識別子
関連識別子 10.1016/j.colsurfa.2017.10.033
権利
権利情報 © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
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出版者 ELSEVIER
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