Interpenetrating polymer network (IPN) as a permanent joint between the elements of a new type of artificial cornea
作者： Traian V. Chirila , Sarojini Vijayasekaran , Robert Horne , Yi-Chi Chen , Paul D. Dalton
关键词: Transmission electron microscopy 、 Composite material 、 Biomedical engineering 、 Miscibility 、 Materials science 、 Morphology (linguistics) 、 Methacrylate 、 Biomaterial 、 Microscopy 、 Interpenetrating polymer network 、 Polymer
摘要: The combination at the interface between two chemically identical polymers was investigated by light and electron (scanning, transmission) microscopy. constitute elements of a new type artificial cornea in which peripheral skirt is made from spongy poly(2-hydroxyethyl methacrylate) (PHEMA) central optical zone homogeneous, transparent PHEMA. Their two-phase along boundary fulfill formally requirements for an interpenetrating polymer network (IPN). procedure manufacture prosthesis described detail. Thin ultrathin sections excised region were using microscopic techniques. Light microscopy allowed measurement diffusion path length PHEMA into sponge, approximately 0.5 mm. Transmission revealed cellular-like morphology as well larger segregated zones, indicated interpenetration on molecular level also relatively poor miscibility despite their chemical structure. latter interpreted result submicroscopic restraints imposed I (sponge) upon II. This study provides evidence that prosthetic should be regarded gradient homo-IPN. system offers union much stronger than those previously reported corneas.
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