Premium
Polymer sheets with a thin nanocomposite layer acting as a UV filter
Author(s) -
KyprianidouLeodidou Tasoula,
Margraf Patrick,
Caseri Walter,
Suter Ulrich W.,
Walther Paul
Publication year - 1997
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/(sici)1099-1581(199708)8:8<505::aid-pat678>3.0.co;2-u
Subject(s) - materials science , polymer , thermogravimetric analysis , titanium tetrachloride , layer (electronics) , opacity , nanocomposite , spectroscopy , copolymer , chemical engineering , transmission electron microscopy , nanoparticle , titanium , composite material , nanotechnology , optics , engineering , physics , quantum mechanics , metallurgy
A surface layer (thickness 1–10 μm) containing colloidal TiO 2 or ZnO particles was prepared in EVA (a copolymer of ethylene and vinyl acetate). The inorganic particles were formed in situ by hydrolysis of incorporated titanium tetrachloride or diethyl zinc. The resulting materials were analyzed with UV spectroscopy, electron microscopy, X‐ray diffraction, thermogravimetric analysis and atomic emission spectroscopy. The average diameter of the embedded TiO 2 particles was 70 nm; these particles absorb UV radiation but also induce opacity in the polymer sheets in the visible wavelengths range. The ZnO particles were smaller (average diameter 15 nm); with a surface layer of embedded ZnO, transparent polymer sheets can be obtained that absorb UV radiation. © 1997 John Wiley & Sons, Ltd.