Sisteme Disperse- FASUI MIHAELA
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Transcript of Sisteme Disperse- FASUI MIHAELA
Universitatea Politehnica Bucureti Facultatea de Chimie Aplicat i tiina Materialelor
Profesor coordonator: Viorel Feroiu Student: FASUI MIHAELA Grupa 1121A Bucureti, 2009
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CUPRINSSISTEME DISPERSE..................................................................................................3 Sisteme disperse eterogene............................................................................................4 Clasificarea coloizilor.....................................................................................................5 Structura particulei.........................................................................................................6 PROPRIETATILE SISTEMELOR COLOIDALE.......................................................7 Proprietati cinetice..........................................................................................................7 Proprietati optice............................................................................................................9 Proprietati electrice.......................................................................................................10 Distributia particulelor dupa marime............................................................................12 CONCLUZII................................................................................................................13 BIBLIOGRAFIE.........................................................................................................14
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I.Sisteme disperseDac o substan este distribuit sub form de particule fine ntr-o alt substan, sistemul obinut se numete sistem dispers. Sistemele disperse se clasific n funcie de mrimea particulelor fazei dispersate (gradul de dispersie) n trei categorii: - sisteme eterogene ( >100m); - sisteme microeterogene sau coloidale (1> >100m); - sisteme omogene (