Chapter 14

4D Printing and Its Biomedical Applications

Saeed Akbari

Saeed Akbari

Singapore University of Technology and Design, Digital Manufacturing and Design Centre, Singapore, 487372 Singapore

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Yuan-Fang Zhang

Yuan-Fang Zhang

Singapore University of Technology and Design, Digital Manufacturing and Design Centre, Singapore, 487372 Singapore

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Dong Wang

Dong Wang

Singapore University of Technology and Design, Digital Manufacturing and Design Centre, Singapore, 487372 Singapore

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Qi Ge

Qi Ge

Singapore University of Technology and Design, Digital Manufacturing and Design Centre, Singapore, 487372 Singapore

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First published: 14 December 2018
Citations: 9

Summary

This chapter discusses the potentials of 4D printing as the next-generation technology to fabricate complex 3D biomedical devices and biological structures exhibiting dynamic shape change capability. It introduces state-of-the-art 3Dprinting technologies with potential applications to 4D printing. The chapter reviews a number of soft active materials (SAMs) that are widely used in 4D printing. Some recent applications of 4D printing in biomedical engineering are presented in detail. The future perspectives of 4D printing in creating novel biomedical devices and bioinspired architectures that can be activated by external stimuli to create highly complex shapes are discussed. The chapter also presents several examples of the application of 4D printing in biomedical field, with special focus on temperature and humidity-sensitive biostructures. Hydrogels are widely used to fabricate scaffolds for tissue engineering applications because they exhibit the features of a natural matrix that creates highly hydrated permeable microenvironments with tunable chemical and mechanical properties appropriate for cell culture.

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