Polymeric Membranes from Colloidal Crystal Templates

CASIS, N.; ESTENOZ, D. A.; RABAINE, S.; FIDALGO DE CORTALEZZI, M.

Santiago de Chile

Congreso; 8º Congreso Internacional CONAMET-SAM 2008; 2008

Polymeric porous membranes were fabricated from templates made from silica particles. Silica particles with anarrow size distribution were synthesized by two different methods. The templates were obtained by verticaldeposition of the particles on a glass substrate and by the Langmuir-Blodgett technique to create templates of different particle sizes. To produce the membrane, polystyrene (PS) and bioinspired polymers were used. They are similar to PS, except for the fact that thymine groups are chemically bonded onto the base PS structure, and their structure mimics DNA. In the presence of short-wavelength UV light, the thymine groups dimerize into non-toxic, environmentally benign, and biodegradable photo-resist materials. Silica particles and porous films were characterized by scanning electron microscopy (SEM). The membranes with pre-specified characteristics will be employed for water filtration.bioinspired polymers were used. They are similar to PS, except for the fact that thymine groups are chemically bonded onto the base PS structure, and their structure mimics DNA. In the presence of short-wavelength UV light, the thymine groups dimerize into non-toxic, environmentally benign, and biodegradable photo-resist materials. Silica particles and porous films were characterized by scanning electron microscopy (SEM). The membranes with pre-specified characteristics will be employed for water filtration.