POROUS MATERIALS

Printing emulsions and foams in 3D

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Science  04 Nov 2016:
Vol. 354, Issue 6312, pp. 594
DOI: 10.1126/science.354.6312.594-b

A printed cubic lattice scaffold for the creation of porous ceramics

PHOTO: MINAS ET AL., MATERIAL VIEWS (10 AUGUST 2016) ©2016

The properties of porous materials can depend on the overall volume, size, and size distribution of the pores, but these can be difficult features to simultaneously control during fabrication. Emulsion or foam techniques can produce pores of only one narrow size range, but in combination with a direct ink-writing process, Minas et al. developed an approach to create porous materials with highly tunable properties. Shear thinning inks made from modified alumina particles are progressively deposited to form an overall structure, where large pores are made by the writing process and small ones from the emulsion or foam, with pores either open or closed. A percolating network of load-bearing struts results in structures with very high strength-to-weight ratios.

Adv. Mater. 10.1002/adma.201603390 (2016).

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