ADHESIVITY OF MOLECULAR-SIEVE FILMS ON METAL SUBSTRATES

Films of silicalite-1, zeolite Y, and SAPO-5 were deposited on steel a nd copper substrates. The film adhesivity, thermal stability, and morp hology of the zeolite films were studied. it is shown that the main fa ctors determining the zeolite film mechanical properties are the inter actions at the substrate-gel interface. On the other hand, the mechani sm of film formation depends on the type of the initial gel and the su bstrate surface activity. In addition, the results obtained indicate t hat the substrate plastic deformation, i.e., the high density of subst rate surface defects, is one of the dominant parameters for good film adhesivity and thermal stability. (C) Elsevier Science Inc. 1996