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Tough, stretchable and compressive alginate-based hydrogels achieved by non-covalent interactions

机译：通过非共价相互作用实现的坚韧，可伸缩和压缩的藻酸盐基水凝胶

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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.
机译：在该研究中，通过疏水相互作用和配位键合合成了具有良好机械强度，韧性和弹性的基于藻酸盐的水凝胶。首先通过丙烯酰胺和甲基丙烯酸酯在藻酸钠存在下通过胶束共聚合成藻酸钠/聚（丙烯酰胺）半渗透网络（NAALG / PAM半IPN）水凝胶，然后在藻酸钠的存在下进行藻酸钙/聚（丙烯酰胺）双网络（通过将AS制备的Naalg / PAM半IPN水凝胶浸入CaCl（2）溶液中来制备CaALG / PAM DN）水凝胶。 FT-IR和XPS结果显示Naalg / PAM半IPN水凝胶，通过非共价相互作用成功地合成CaAlg / PAM DN水凝胶。 CaALG / PAM DN水凝胶的拉伸强度可达到733.6kPa，并且其80％菌株的抗压强度显着高于相应的Naalg / PAM半IPN水凝胶，其归因于Ca2 +交联的藻酸盐网络。双物理交联的CAALG / PAM DN水凝胶可以实现快速的自恢复，良好的疲劳性，主要通过两个网络中的动态可逆非共价交互分配给能量耗散。还评估了合成的藻酸盐基水凝胶的自愈能力，膨胀行为和形态。本研究提供了一种新的途径来设计和构建具有高机械强度，高韧性和快速自我回收性能的水凝胶，这拓宽了水凝胶的目前的研究和应用。

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  • 来源
    《RSC Advances》 |2020年第40期|共15页
  • 作者

    Jing Zhanxin; Dai Xiangyi; Xian Xueying; Du Xiaomei; Liao Mingneng; Hong Pengzhi; Li Yong;

  • 作者单位

    Guangdong Ocean Univ Coll Chem &

    Environm Zhanjiang 524088 Guangdong Peoples R China;

    Guangdong Ocean Univ Coll Chem &

    Environm Zhanjiang 524088 Guangdong Peoples R China;

    Guangdong Ocean Univ Coll Chem &

    Environm Zhanjiang 524088 Guangdong Peoples R China;

    Guangdong Ocean Univ Coll Chem &

    Environm Zhanjiang 524088 Guangdong Peoples R China;

    Guangdong Ocean Univ Coll Chem &

    Environm Zhanjiang 524088 Guangdong Peoples R China;

    Guangdong Ocean Univ Coll Chem &

    Environm Zhanjiang 524088 Guangdong Peoples R China;

    Guangdong Ocean Univ Coll Chem &

    Environm Zhanjiang 524088 Guangdong Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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