期刊
RSC ADVANCES
卷 10, 期 40, 页码 23592-23606出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ra03733h
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资金
- Natural Science Foundation of Guangdong Province [2018A030307020]
- College Youth Innovation Talents Project of Guangdong Province [2017KQNCX089]
- Science and Technology Plan Project of Zhanjiang City [2019A01006]
- Program for Scientific Research Start-up Funds of Guangdong Ocean University [R19010]
- National College Student Innovation and Entrepreneurship Training Program [201810566034, CXXL2018034]
- Project of enhancing school with innovation of Guangdong Ocean University [Q18304]
In this study, two alginate-based hydrogels with good mechanical strength, toughness and resilience were synthesized by hydrophobic interaction and coordination bonding. Sodium alginate/poly(acrylamide) semi-interpenetrating network (NaAlg/PAM semi-IPN) hydrogels were first synthesized through the micelle copolymerization of acrylamide and stearyl methacrylate in the presence of sodium alginate, then calcium alginate/poly(acrylamide) double network (CaAlg/PAM DN) hydrogels were prepared by immersing the as-prepared NaAlg/PAM semi-IPN hydrogels in a CaCl(2)solution. FT-IR and XPS results revealed NaAlg/PAM semi-IPN hydrogels and CaAlg/PAM DN hydrogels were successfully synthesized through non-covalent interactions. The tensile strength of CaAlg/PAM DN hydrogels could reach 733.6 kPa, and their compressive strengths at 80% strain are significantly higher than those of the corresponding NaAlg/PAM semi-IPN hydrogels, which is attributed to the alginate network crosslinked by Ca2+. The dual physically crosslinked CaAlg/PAM DN hydrogels can achieve fast self-recovery, and good fatigue resistance, which is mainly assigned to energy dissipation through dynamic reversible non-covalent interactions in both networks. The self-healing ability, swelling behavior and morphology of the synthesized alginate-based hydrogels were also evaluated. This study offers a new avenue to design and construct hydrogels with high mechanical strength, high toughness and fast self-recovery properties, which broadens the current research and application of hydrogels.
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