The Effect of Co-Monomer Content on the Swelling/Shrinking and Mechanical Behaviour of Individually Adsorbed PNIPAM Microgel Particles

Polymers

Anna Burmistrova¹  Marcel Richter¹  Michael Eisele¹  Cagri Üzüm¹ 

[1] Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 124, D-10623 Berlin, Germany;

关键词: PNIPAM;    microgels;    AFM;    elasticity;    Young's modulus;   

DOI  :  10.3390/polym3041575

来源: mdpi

【 摘 要 】

The swelling/deswelling behaviour of microgel particles in the bulk and at the surface was studied and correlated to their mechanical properties. We focused on two kinds of particles: pure PNIPAM and PNIPAM-co-AAc particles. It was shown that the two step volume phase transition found for PNIPAM-co-AAc particles in the bulk disappears after the adsorption at the surface and only a one step transition was identified. The transition temperature increased strongly with increasing the co-monomer content. The dependence of the Young's modulus of the adsorbed microgel particles on the temperature and the co-monomer content was discussed. The investigations were performed via DLS and SFM.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.