Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Dilution Stable Water Based Magnetic Fluids.

Authors
Khalafalla-SE; Reimers-GW; Rholl-SA
Source
U S Pat 4 208 294 1980 Jun; :
Link
NIOSHTIC No.
10007169
Abstract
A dilution-stable water-based ferrofluid is made by dispersing magnetic particles in water with the aid of a c12-c15 aliphatic monocarboxylic acid. The magnetic particles are preferably particles of magnetite, prepared by the precipitation of dissolved iron chlorides from aqueous solution using ammonia. The preferred acids used in preparing the dispersions are dodecanoic (c12) and tridecanoic (c13). For example, a magnetic fluid that can be diluted with water at a 50:1 ratio without flocculation was obtained by adding dodecanoic acid 4.8 G to a precipitate obtained by adding concentrated nh4oh 50 ml to a 50 ml solution of fecl2.4H2o 12 g and fecl3 24 g.
Publication Date
19800601
Document Type
PA;
Fiscal Year
1980
NTIS Accession No.
NTIS Price
Identifying No.
P 13-80
NIOSH Division
TCRC;
Source Name
U.S. Pat. 4,208,294; June 17, 1980; Chem. Abstr. 91:221,542J
TOP