The effect of Hofmeister cations on the colloidal stability of PMMA/PEG particles

• Grant number: 12/25096-8
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: March 01, 2013
• End date: December 31, 2013
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Denise Freitas Siqueira Petri
• Grantee: Larissa Harumi Nakahara Nukui
• Host Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The colloidal stability of poly(ethylene glycol)-decorated poly(methyl methacrylate) (PMMA/PEG) particles will be systematically investigated in the presence of mono-and divalent Hofmeister cations (nitrate as counter-ion) by means of phase separation analyzer, dynamic light scattering, zeta potential measurements and small angle X-ray scattering. The study aims understanding the colloidal behavior of these systems, considering not only the variations of electrostatic potential predicted by DLVO theory, but also the specific interaction between NH4+, K+, Na+, Ca2+ e Sr2+ cations and PEG on the particles surfaces. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

NUKUI, LARISSA H. N.; BARBOSA, LEANDRO R. S.; PETRI, DENISE F. S.. Impact of Monovalent and Divalent Cations on the Colloidal Stability of Negatively Charged Latex Particles Decorated with Poly(ethylene glycol). Industrial & Engineering Chemistry Research, v. 55, n. 3, p. 606-614, JAN 27 2016. (10/51219-4, 12/25096-8)