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Chemie: Die Kraft des Gels | Chemikalien.de
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Chemie: Die Kraft des Gels

Juni 4, 2002 by admin 

Es gibt eine neue Art von Hydrogelen - aus Polypeptiden, kleineren Untereinheiten von Proteinen. Hydrogele sind dreidimensionale Molekülgeflechte, die in Wasser quellen, ohne sich darin aufzulösen. Sie werden zur Andickung von Lebensmitteln und Kosmetika, zur Unterstützung von Wirkstofftransport und Gewebeaustausch und sogar als Sensoren verwendet. Die gelierenden Eigenschaften der Polypeptide resultieren zum Teil aus den interessanten Strukturen, die sie in wässrigen Lösungen bilden - beispielsweise Helices und zufällig angeordnete Spiralen. Entwickelt wurden Polypeptid-Hydrogele von T. Deming und seinen Kollegen von der University of California in Santa Barbara . Sie sind bis zu einer Temperatur von 90 °C hitzebeständig und erlangen sehr bald nach dem Zerfall wieder ihre ursprüngliche Stabilität. Diese Eigenschaften “können sich für biomedizinische Anwendungen als nützlich erweisen”, sagt Jindrich Kopecek von der University of Utah, Salt Lake City.

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