STUDY ON STABILITY AND RHEOLOGY OF PEG6000/NANO-Ni(OH)2 SOL.

The PEG6000/nano-Ni(OH)2 sol was prepared by modified sol–gel method. The effect of Ac- on Ni(OH)2 colloidal particles and the structure of PEG6000/nano-Ni(OH)2 was investigated. The results show that hydrogen bonds or other weak interaction forces between PEG6000 and Ni(OH)2 can change the zeta potential of the Ni(OH)2 surface and enhance the colloidal stability of Ni(OH)2. The stable region of the PEG6000/Ni(OH)2 sol was determined by measuring the viscosity. The ratio of PEG6000 to Ni(OH)2 is the principal factor that influences the flow patterns of the sol. Surfaces of the thin films prepared from Newtonian sol by sol–gel spin-coating method are smooth while those from pseudoplastic sol are rough. The results establish the theoretical foundation for preparing the nano-NiO thin films by spin-coating method. [ABSTRACT FROM AUTHOR]