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Dispersing multi-component and unstable powders in aqueous media using comb-type anionic polymers
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
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2006 (Engelska)Ingår i: Journal of The American Ceramic Society, ISSN 0002-7820, E-ISSN 1551-2916, Vol. 89, s. 1847-1852Artikel i tidskrift (Refereegranskat)
Abstract [en]

We have investigated the effect of polymeric dispersants on the rheological properties and consolidation behavior of concentrated cemented carbide (WC-Co) and magnesia (MgO) suspensions. The relatively novel types of comb-type anionic polymers with grafted non-ionic side chains are effective dispersants also in multi-component powder mixtures with a complex solution and surface chemistry and result in more robust suspensions at significantly higher solids loading compared with e.g., a traditional cationic polyelectrolyte. Direct force measurements on comb-type dispersants with different lengths of the grafted ethylene oxide side chains showed that the dispersants adsorb onto a MgO surface and infer a repulsion where the range scales with the length of the poly ethylene oxide side chains. The compressibility and the consolidation behavior of MgO particle networks in response to a centrifugal force field could be related to the estimated thickness of the adsorbed comb-type dispersants.

Ort, förlag, år, upplaga, sidor
2006. Vol. 89, s. 1847-1852
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Naturvetenskap
Identifikatorer
URN: urn:nbn:se:ri:diva-26610OAI: oai:DiVA.org:ri-26610DiVA, id: diva2:1053613
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A1842Tillgänglig från: 2016-12-08 Skapad: 2016-12-08 Senast uppdaterad: 2017-11-29Bibliografiskt granskad

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