Shape-memory hydrogels (SMHs) have been used for various biomedical applications, such as injectable scaffolds in noninvasive procedures and as carriers for drugs and stem cells. However, most SMH studies have investigated properties related to shape recovery rather than bioactivities governed by hydrogel micro/nanostructure. In this study, one of the main structural proteins in tissues and organs, collagen, was incorporated into SMHs, and by varying the fabrication procedure, two different collagen-based SMHs were obtained. The first was a collagen Cryo-gel that could immediately recover its programmed shape. The second was a fibrous collagen gel (F-gel) fabricated by collagen fibrillation that required more time for recovery but possessed a much higher shape fixity ratio and better supported cell adhesion and growth in vitro. To combine the advantages of the two hydrogels, we fabricated a new collagen-based biocomposite that incorporated fibrillated collagen and photo-crosslinkable methacrylated collagen (Col-ma). A collagen/Col-ma ratio of 5:5 was the most favorable for shape recovery and cellular activity.
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June 2022
Research Article|
June 01 2022
Collagen-based shape-memory biocomposites

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JiUn Lee
;
JiUn Lee
Department of Biomechatronic Engineering, College of Biotechnology and Bioengineering, Sungkyunkwan University (SKKU)
, 16419 Suwon, South Korea
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GeunHyung Kim
GeunHyung Kim
a)
Department of Biomechatronic Engineering, College of Biotechnology and Bioengineering, Sungkyunkwan University (SKKU)
, 16419 Suwon, South Korea
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Department of Biomechatronic Engineering, College of Biotechnology and Bioengineering, Sungkyunkwan University (SKKU)
, 16419 Suwon, South Korea
GeunHyung Kim
a)
Department of Biomechatronic Engineering, College of Biotechnology and Bioengineering, Sungkyunkwan University (SKKU)
, 16419 Suwon, South Korea
a)
Author to whom correspondence should be addressed:[email protected]. Tel.: +82-31-290-7828.
Appl. Phys. Rev. 9, 021415 (2022)
Article history
Received:
January 10 2022
Accepted:
May 04 2022
Citation
JiUn Lee, GeunHyung Kim; Collagen-based shape-memory biocomposites. Appl. Phys. Rev. 1 June 2022; 9 (2): 021415. https://doi.org/10.1063/5.0084794
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