Jump to main content
Jump to site search

Issue 15, 2016
Previous Article Next Article

Processing fragile matter: effect of polymer graft modification on the mechanical properties and processibility of (nano-) particulate solids

Author affiliations

Abstract

The effect of polymer modification on the deformation characteristics and processibility of particle assembly structures is analyzed as a function of particle size and degree of polymerization of surface-tethered chains. A pronounced increase of the fracture toughness (by approximately one order of magnitude) is observed as the degree of polymerization exceeds a threshold value that increases with particle size. The threshold value is interpreted as being related to the transition of tethered chains from stretched-to-relaxed conformation (and the associated entanglement of tethered chains) and agrees with predictions from scaling theory. The increase in toughness is reduced with increasing particle size – this effect is rationalized as a consequence of the decrease of entanglement density with increasing dimension of interstitial (void) space in particle array structures. The increased fracture toughness of particle brush materials (with sufficient degree of polymerization of tethered chains) enables the fabrication of ordered colloidal films and even complex 3D shapes by scalable polymer processing techniques, such as spin coating and micromolding. The results, therefore, suggest new opportunities for the processing of colloidal material systems that could find application in the economical fabrication of functional components or systems compromised of colloidal materials.

Graphical abstract: Processing fragile matter: effect of polymer graft modification on the mechanical properties and processibility of (nano-) particulate solids

Back to tab navigation
Please wait while Download options loads

Publication details

The article was received on 13 jan. 2016, accepted on 11 mar. 2016 and first published on 11 mar. 2016


Article type: Paper
DOI: 10.1039/C6SM00095A
Citation: Soft Matter, 2016,12, 3527-3537
  •   Request permissions

    Processing fragile matter: effect of polymer graft modification on the mechanical properties and processibility of (nano-) particulate solids

    M. Schmitt, J. Choi, C. Min Hui, B. Chen, E. Korkmaz, J. Yan, S. Margel, O. Burak Ozdoganlar, K. Matyjaszewski and M. R. Bockstaller, Soft Matter, 2016, 12, 3527
    DOI: 10.1039/C6SM00095A

Search articles by author