Dispersing Multi-Component and Unstable Powders in Aqueous Media Using Comb-Type Anionic Polymers

$48.00 plus tax (Refund Policy)

Download / Buy Article:

Abstract:

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.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1551-2916.2006.01055.x

Affiliations: 1: YKI, Institute for Surface Chemistry, Stockholm, Sweden 2: Sandvik Tooling AB, Stockholm, Sweden 3: Department of Civil Engineering, Technical University of Denmark, Lyngby, Denmark 4: Materials Chemistry Research Group, Department of Physical, Inorganic and Structural Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm, Sweden

Publication date: June 1, 2006

Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more