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.