Regensburg 2016 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 47: Poster: Interfaces and Thin Films

CPP 47.14: Poster

Mittwoch, 9. März 2016, 18:15–21:00, Poster B2

Adsorption of acid-hydrolysed soy protein on hydrophobic surfaces studied with x-ray reflectivity — Paul Salmen¹, Julia Nase¹, •Steffen Bieder¹, Patrick Degen², Yury Forov¹, Lena Heuchel¹, Florian Wirkert¹, Michael Paulus¹, and Metin Tolan¹ — ¹Fakultät Physik/DELTA, Technische Universität Dortmund, 44221 Dortmund, Germany — ²Physikalische Chemie 2, Technische Universität Dortmund, 44221 Dortmund, Germany

The adsorption of denaturized or fragmented proteins is important for many applications in industry and biology. We investigated the adsorption of soy sauce and acid hydrolyzed soy protein on hydrophobic, octadecyltrichlorosilane coated silicon wafers and at the air/water interface with x-ray reflectivity. For acid hydrolyzed soy protein, a concentration dependent adsorption is visible at both interfaces. The adsorbed layers have a thickness in the nm range and change the surface properties, like wettability and contact angle, strongly. Also, we were able to show that the amount of adsorbed protein fragments is correlated with the hydrophobicity of the interfaces.