Structuring and sedimentation stability of titanium phosphate nanoparticles in polymer solutions.
The influence of dispersed phase nature on the sedimentation stability as well as coagulation structure of titanium phosphate (TP) nanoparticles in polymer suspensions has been investigated. Two systems are considered: (i). TP suspension in toluene/ethyl cellosolve mixed solution of ephoxy resin E-40 and (ii). multicomponent system, ferric oxide, talc and TP suspension in toluene/ethyl cellosolve solution of E-40, as a model of the practical varnish-paint systems. For the case of a polar solvent, a unique phenomenon, extremal dependence of the strength of model systems on the concentration TP, is detected and increase of sedimentation stability of TP organic suspensions with time of contact of TP with a solvent is observed. Data of FTIR-spectroscopy show that phenomena detected result from the formation adsorption shell possessing high structural viscosity on TP nanopaticles.
Uryupina
O Ya
OY
Institute of Physical Chemistry of RAS, Leninskii pr 31, 119991, Moscow, Russia. roldugin@serv1.phyche.ac.ru
Serebryakova
N V
NV
Roldughin
V I
VI
D005290:Ferric Compounds / Q000737:chemistry; D007700:Kinetics; D008956:Models, Chemical; D036103:Nanotechnology; D011108:Polymers / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013997:Time Factors; D014025:Titanium / Q000737:chemistry*
D005290:Ferric Compounds; D011108:Polymers; C036532:titanium phosphate; C000499:ferric oxide; D014025:Titanium