Covalent immobilization of cellulose layers onto maleic anhydride copolymer thin films.
Thin films of cellulose are advantageous for analytical studies in aqueous environments to investigate various factors determining the performance of cellulose-based products. However, the weak fixation of cellulose layers on common carrier materials often limits this approach. To address this problem, we suggest a novel maleic anhydride copolymer precoating technique which allows for the covalent attachment of cellulose thin films through esterification. Maleic anhydride copolymers were deposited and covalently bound onto planar, aminosilane-modified glass or silicon oxide surfaces. Cellulose was subsequently immobilized on top of the copolymer precoatings by spin coating from N-methylmorpholine-N-oxide/dimethyl sulfoxide solutions. The resulting cellulose films were thoroughly characterized with respect to layer thickness, morphology, chemical constitution, and electrical charging. The stability of the layers against shear stress was demonstrated in aqueous solutions and the covalent attachment of the cellulose to the copolymer films was proven by means of dissolution experiments followed by ellipsometry and high-resolution X-ray photoelectron spectroscopy.
Freudenberg
Uwe
U
Leibniz Institute of Polymer Research and The Max Bergmann Center of Biomaterials Dresden, Hohe Str. 6, 01069 Dresden, Germany.
Zschoche
Stefan
S
Simon
Frank
F
Janke
Andreas
A
Schmidt
Kati
K
Behrens
Sven Holger
SH
Auweter
Helmut
H
Werner
Carsten
C
D002482:Cellulose / Q000032:analysis / Q000737:chemistry*; D008299:Maleic Anhydrides / Q000032:analysis / Q000737:chemistry*; D011108:Polymers / Q000032:analysis / Q000737:chemistry*
D008299:Maleic Anhydrides; D011108:Polymers; D002482:Cellulose