3 years ago

Surface Patterning of Hydrogels for Programmable and Complex Shape Deformations by Ion Inkjet Printing

Surface Patterning of Hydrogels for Programmable and Complex Shape Deformations by Ion Inkjet Printing
Qin Zhang, Tianqi Liu, Qing-Wen Bai, Huiliang Wang, Cong Shang, Xin Peng
Convenient patterning and precisely programmable shape deformations are crucial for the practical applications of shape deformable hydrogels. Here, a facile and versatile computer-assisted ion inkjet printing technique is described that enables the direct printing of batched, very complicated patterns, especially those with well-defined, programmable variation in cross-linking densities, on one or both surfaces of a large-sized hydrogel sample. A mechanically strong hydrogel containing poly(sodium acrylate) is first prepared, and then digital patterns are printed onto the hydrogel surfaces by using a commercial inkjet printer and an aqueous ferric solution. The complexation between the polyelectrolyte and ferric ions increases the cross-linking density of the printed regions, and hence the gel sample can undergo shape deformation upon swelling/deswelling. The deformation rates and degrees of the hydrogels can be conveniently adjusted by changing the printing times or the different/gradient grayscale distribution of designed patterns. By printing appropriate patterns on one or both surfaces of the hydrogel sheets, many complex 3D shapes are obtained from shape deformations upon swelling/deswelling, such as cylindrical shell and forsythia flower (patterns on one surface), ding (patterns on both surfaces), blooming flower (different/gradient grayscale distributive patterns on one surface), and non-Euclidean plates (different/gradient grayscale distributive patterns on both surfaces). Computer-assisted ion inkjet printing technique enables the direct printing of complicated patterns, especially those with different or gradient grayscale distributions. By printing with appropriate patterns on one or both surfaces of the hydrogel sheets, many complex 3D shapes are obtained from the shape deformations upon swelling/deswelling, such as protuberant hexagon with sexfoil patterns, ding, blooming flower, and non-Euclidean plate shapes.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/adfm.201701962

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.