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Tough High Modulus Hydrogels Derived from Carbon-Nitride via an Ethylene Glycol Co-solvent Route

MPG-Autoren
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Kumru,  Baris
Bernhard Schmidt, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Molinari,  Valerio
Valerio Molinari, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Shalom,  Menny
Menny Shalom, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Antonietti,  Markus
Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Schmidt,  Bernhard V. K. J.
Bernhard Schmidt, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Zitation

Kumru, B., Molinari, V., Shalom, M., Antonietti, M., & Schmidt, B. V. K. J. (2018). Tough High Modulus Hydrogels Derived from Carbon-Nitride via an Ethylene Glycol Co-solvent Route. Soft Matter, 14(14), 2655-2664. doi:10.1039/C8SM00232K.


Zitierlink: http://hdl.handle.net/21.11116/0000-0000-D45A-C
Zusammenfassung
High concentration formulations of graphitic carbon nitride (g-CN) are utilized as photoinitiator and reinforcer for hydrogels. In order to integrate significant amounts of g-CN, ethylene glycol (EG) is employed as a co-solvent for the gel formation, which enables stable dispersion of up to 4 wt.% g-CN. Afterwards, EG can be removed easily via solvent exchange to afford pure hydrogels. The diverse gels possess remarkably high storage moduli (up to 650 kPA for gels and 720 kPA for hydrogels) and compression moduli (up to 9.45 MPa for 4 wt.% g-CN EG gel and 3.45 MPa for 4 wt.% g-CN hydrogel). Full recovery without energy loss is observed for at least 20 cycles. Moreover, gel formation can be performed in a spatially controlled way utilizing photomasks with desired shapes. Therefore, the suggested novel method enables formation of hybrid gels by optical lithography with outstanding mechanical properties very similar to natural cartilage and tendon, and opens up opportunities for future applications in additive manufacturing of biomedical implants and coating materials.