Characterization of the surface properties of persimmon leaves by FT-Raman spectroscopy and wicking technique

To fit the request of developing new biomaterials using persimmon leaves as raw material, this paper reported the surface free energy and related components, e.g. the Lifshitz-van der Waals and Lewis acid-base components for persimmon leaves estimated by means of the column wicking technique. Considering this natural material might be varied of its properties with growing area, a characterization of it was initially performed by applying the FT-Raman spectroscopy. Based on the determined results, persimmon leaves have greater surface free energy, gammas, than cellulose though it has been found rich in this component, e.g. of about 68.28%. Moreover, it was further observed that the contributed by the Lewis acid component, gamma(s)(+). This suggests that persimmon leaves have great Lewis acid-base interactions component, gamma(S)(AB), the persimmon leaves are available to convert to new biomaterials expected forms. (C) 2004 Elsevier B.V. All rights reserved.