Efficient infiltration of low molecular weight polymer in nanoporous TiO_2

摘要

The polymer APFO3 was prepared with different molecular weights to study how the infiltration into nanoporous TiO_2 films of different thickness depends on the size of the polymer. Also two different sizes of TiO_2 nanoparticles were investigated to understand the effect of different pore size. It was observed that the lowest molecular weight polymer dissolved in chlorobenzene could infiltrate the nanoporous TiO_2 network up to several micrometer thick films. It was concluded that efficient polymer infiltration into thick nanoporous layers was possible for the polymers with an estimated average chain length smaller than the diameter of the nanoparticles.