NDLI: 3D printing of concentrated emulsions into multiphase biocompatible soft materials

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Back cover

Soft Matter Vol - 13 Issue - 8

Soft Matter Vol - 13 Issue - 7

Soft Matter Vol - 13 Issue - 6

Soft Matter Vol - 13 Issue - 5

Soft Matter Vol - 13 Issue - 4

Soft Matter Vol - 13 Issue - 3

Soft Matter Vol - 13 Issue - 2

3D printing of concentrated emulsions into multiphase biocompatible soft materials

Content Provider	Royal Society of Chemistry (RSC)
Author	Minas, Clara Studart, André R. Alison, Lauriane Sommer, Marianne R. Tervoort, Elena Rühs, Patrick A.
Copyright Year	2017
Abstract	3D printing via direct ink writing (DIW) is a versatile additive manufacturing approach applicable to a variety of materials ranging from ceramics over composites to hydrogels. Due to the mild processing conditions compared to other additive manufacturing methods, DIW enables the incorporation of sensitive compounds such as proteins or drugs into the printed structure. Although emulsified oil-in-water systems are commonly used vehicles for such compounds in biomedical, pharmaceutical, and cosmetic applications, printing of such emulsions into architectured soft materials has not been fully exploited and would open new possibilities for the controlled delivery of sensitive compounds. Here, we 3D print concentrated emulsions into soft materials, whose multiphase architecture allows for site-specific incorporation of both hydrophobic and hydrophilic compounds into the same structure. As a model ink, concentrated emulsions stabilized by chitosan-modified silica nanoparticles are studied, because they are sufficiently stable against coalescence during the centrifugation step needed to create a bridging network of droplets. The resulting ink is ideal for 3D printing as it displays high yield stress, storage modulus and elastic recovery, through the formation of networks of droplets as well as of gelled silica nanoparticles in the presence of chitosan. To demonstrate possible architectures, we print biocompatible soft materials with tunable hierarchical porosity containing an encapsulated hydrophobic compound positioned in specific locations of the structure. The proposed emulsion-based ink system offers great flexibility in terms of 3D shaping and local compositional control, and can potentially help address current challenges involving the delivery of incompatible compounds in biomedical applications.
Starting Page	1794
Ending Page	1803
Page Count	10
File Format	HTM / HTML PDF
ISSN	1744683X
Volume Number	13
Issue Number	9
Journal	Soft Matter
DOI	10.1039/c6sm02682f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	DIW DIW Records Yield (engineering) Centrifugation Biocompatibility Hydrophobe Hydrophile Chitosan Porosity 3D printing Silicon dioxide Three-dimensional space
Content Type	Text
Resource Type	Article
Subject	Chemistry Condensed Matter Physics

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