文献类型：期刊文献

英文题名：Tough, stretchable and compressive alginate-based hydrogels achieved by non-covalent interactions

作者：Jing, Zhanxin[1];Dai, Xiangyi[1];Xian, Xueying[1];Du, Xiaomei[1];Liao, Mingneng[1];Hong, Pengzhi[1];Li, Yong[1]

机构：[1]Guangdong Ocean Univ, Coll Chem & Environm, Zhanjiang 524088, Guangdong, Peoples R China

年份：2020

卷号：10

期号：40

起止页码：23592

外文期刊名：RSC ADVANCES

收录：SCI-EXPANDED(收录号：WOS:000544674800009)、、EI(收录号：20202808930794)、Scopus(收录号：2-s2.0-85087739259)、WOS

基金：This work was supported financially by the 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), Project of enhancing school with innovation of Guangdong Ocean University (Q18304), Program for Scientific Research Start-up Funds of Guangdong Ocean University (R19010), National College Student Innovation and Entrepreneurship Training Program (201810566034, CXXL2018034).

语种：英文

外文关键词：Computer system recovery - Acrylic monomers - Amides - Chlorine compounds - Compressive strength - Energy dissipation - Hydrophobicity - Tensile strength

外文摘要：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.