Electrical factors of colloid stability

✍ Scribed by Hedges, Ernest S.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1932
• Weight: 410 KB
• Volume: 51
• Category: Article
• ISSN: 0368-4075
• DOI: 10.1002/jctb.5000514602

✦ Synopsis

The proccsscs of pcpt iziition, congulntion, basc-escI~nngc, :ind nllied phcnonicnn brought nliout 1)y the intcrnction of colloids niid clcctrolytcs liiivc lctl to n gcncrally acccptcd theory of the st;ibility of lipdrosols in tcrnis of a diffuse doublc layer of ions. According to this view the positively-chnrgctl colloitl particlc ]ins at its surf:icc an adsorbed lnycr of cations whilst the corrcsponiling anions nrc amingcd ns an outer cliff usc atniosplicrc, the density dccrcnsing as the distance from the particle increases. Thc anions are thus in tlie liquid surrounding tlic particlc, but it is probrrblc t l i i i t wlicn tlic positive pnrticlc nioves it titkcs with it not only the ntlsorbcd cntions but iilso tlie ioiiiost sheath of nnions. Tlic electrical disturl)iince ciiusctl by tliis scpration of the mobile and ininioliilc parts of the diffisc double I:ycr is tlic root of the clcctrokinctic or 5 potentiril, wliicli is tlic innin clcctricnl factor of colloid