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Dispersing multi-co...
Dispersing multi-component and unstable powders in aqueous media using comb-type anionic polymers
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- Laarz, E (författare)
- RISE,YKI – Ytkemiska institutet
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- Kauppi, A (författare)
- RISE,YKI – Ytkemiska institutet
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Andersson, KM (författare)
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visa fler...
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Kjeldsen, AM (författare)
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Bergstrom, L (författare)
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visa färre...
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(creator_code:org_t)
- 2006
- 2006
- Engelska.
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Ingår i: Journal of The American Ceramic Society. - 0002-7820 .- 1551-2916. ; 89, s. 1847-1852
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
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- 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.
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