Hydrogel

1.Based on a modulated cross-link density

We use mask wise exposure to create crosslink-rich regions under the illuminated area. The remaining acrylates are polymerized during the second flood exposure.


Surface topographies of a poly(N-isopropylacrylamide) coating


Surface topographies of a polyacrylate acid coating

2. Asymmetric surface topographies

For some applications, e.g. materials transportation, asymmetric structures are required to induce directionality.



3. Light induced dynamic surface topogrpahies

A light-absorbing material is integrated into a thermally responsive matrix. The temperature of the materials increases as they absorb the light, which then triggers the thermally responsive polymer.




Publications

Danqing Liu, Cees W.M. Bastiaansen, Jaap M.J. Toonder and Dirk J. Broer, Light-induced thermal responsive topologies in polymer hydrogel networks, Langmuir 2013, 29, 5622-5629.

Danqing Liu, Cees W.M. Bastiaansen, Jaap M.J. Toonder and Dirk J. Broer, Single-composition three-dimensionally morphing hydrogels, Soft Matter 2013, 9, 588-596