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Substrat mit gering lichtstreuender, ultraphober Oberflaeche und Verfahren zu seiner Herstellung

Substrates with low light scattering ultraphobic surfaces are of optionally transparent plastics, glass, ceramics or carbon and are used in solar cells or as screens or external elements for buildings, vehicles or aircraft.
 
: Reihs, K.; Duparre, A.; Notni, G.

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Frontpage ()

DE 2000-10026299 A: 20000526
DE 2000-10026299 A: 20000526
EP 2001-943441 A: 20010523
WO 2001-EP5942 A: 20010523
DE 10026299 A1: 20011129
EP 1289899 A1: 20030312
C09K0003
C03C0017
German
Patent, Electronic Publication
Fraunhofer IOF ()

Abstract
Es wird ein Substrat mit einer gering lichtstreuenden, ultraphoben Oberflaeche, ein Verfahren zur Herstellung des Substrates und seine Verwendung beschrieben. Das Substrat mit gering lichtstreuender, ultraphober Oberflaeche weist einen totalen Streulichtverlust <= 7%, bevorzugt ? 3%, besonderes bevorzugt <= 1%, und einen Randwinkel gegenueber Wasser von<= 140°, bevorzugt >= 150°, auf.

 

DE 10026299 A UPAB: 20020402 NOVELTY - An ultraphobic substrate has a total scattered light loss of at most 7 ( at most 1)% and a contact angle with water at least 140 (especially at least 150) deg. . DETAILED DESCRIPTION - Also included is an INDEPENDENT CLAIM for identification of process conditions and production of suitable surfaces comprising: (a) determining the refractive index of the individual coating layers for a number of substrates which have been selected with respect to the thickness and sequence of the coating layers; (b) calculating the total scattered light loss for various surface topographies and selecting those with a loss of at most 7 (especially at most 1)%; (c) selecting the topographies for ultraphobic properties using the expression Slog(f) = a(f).f such that the integral of the function Slog(f) is at least 0.3 between the limits log(f1/ mu m1) = -3 and log(f2/ mu m1) = 3 (PCT/99/10322 (WO0039240); (d) ensuring that the coating process is such that conditions (b) and (c) are fulfilled in series or (especially) parallel; (e) determining the total scattering loss and the contact angle; and (f) identifying the cases in which the contact angle at least 140 (especially at least 150) deg. and the total scattered light loss at most 7 ( at most 1)%. USE - Claimed uses are as (a) transparent screens (eg windows) or cover layers for such screens (especially of glass or plastics) for use in solar cells, vehicles aircraft or houses; and (b) non-transparent external elements for buildings, vehicles or aircraft. ADVANTAGE - Substrates are provided which combine low light scattering with ultraphobicity.

: http://publica.fraunhofer.de/documents/N-44103.html