Journal
FRONTIERS IN CHEMISTRY
Volume 8, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fchem.2020.00106
Keywords
protein hydrogels; high strength; non-swelling; self-recovery; fatigue resistance
Categories
Funding
- National Natural Science Foundation of China [21504022]
- Henan Province [17HASTIT006, NSFRF1605, 2016GGJS-039]
- Henan Polytechnic University [72105/001, 672517/005]
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Natural protein-based hydrogels possess excellent biocompatibility; however, most of them are weak or brittle. In the present work, high strength hybrid dual-crosslinking BSA gels (BSA DC gels), which have both chemical cross-linking and physical cross-linking, were fabricated by a facile photoreaction-heating process. BSA DC gels showed high transparency (light transmittance of 90%) and high strength. At optimal conditions, BSA DC gel exhibited high compressive strength (sigma(c,f)) of 37.81 +/- 2.61 MPa and tensile strength (sigma(t,f)) of 0.62 +/- 0.078 MPa, showing it to be much stronger than physically cross-linked BSA gel (BSA PC gel) and chemically cross-linked BSA gel (BSA CC gel). More importantly, BSA DC gel displayed non-swelling properties while maintaining high strength in DI water, pH = 3.0, and pH = 10.0. Moreover, BSA DC gel also demonstrated large hysteresis, rapid self-recovery, and excellent fatigue resistance properties. It is believed that our BSA DC gel can potentially be applied in biomedical fields.
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