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首页> 外文期刊>RSC Advances >Highly tough and puncture resistant hydrogels driven by macromolecular microspheres
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Highly tough and puncture resistant hydrogels driven by macromolecular microspheres

机译：由大分子微球驱动的高度坚韧和刺穿的水凝胶

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摘要

Traditional hydrogels with poor mechanical properties have the largest barrier for extensive practical applications, such as artificial tendons, cartilage, skin and so on. In this work, a novel design strategy is proposed and demonstrated to improve the mechanical behavior of hydrogels by introducing ductile macromolecular microspheres (MMs) as crosslinking centers. Firstly, the MMs are synthesized, using butyl acrylate as the main component and dicyclopentyl acrylate as an intermolecular crosslinker, by a conventional emulsion polymerization method. Then acrylamide (AM) and hexadecyl methacrylate (HMA) are crosslinked by the MMs in water to form MM crosslinked poly(acrylamide-co-hexadecyl methacrylate) (P(AM/HMA)-MM) hydrogels. From the tensile measurements, the P(AM/HMA)-MM hydrogels exhibit dramatic enhancement of fracture stress sigma(f) (0.555 MPa) and fracture strain epsilon(f) (5533%) when compared to the original P(AM/HMA) hydrogels. Furthermore, the P(AM/HMA)-MM hydrogels also have excellent puncture resistant properties. Based on traditional mechanisms of rubber-toughened plastics, it is clear that MMs can not only prevent the further development of cracks but can also be stretched to deform and absorb a large amount of energy. It is envisioned that this novel strategy, inspired by a toughening mechanism, will be an effective approach to enhance the mechanical properties and broaden the range of applications for hydrogels.
机译：机械性能差的传统水凝胶具有广泛的实际应用的最大屏障，如人工肌腱，软骨，皮肤等。在这项工作中，提出了一种新颖的设计策略，并证明通过将延性大分子微球（MMS）作为交联中心引入水凝胶的力学行为。首先，通过常规乳液聚合方法使用丙烯酸丁酯作为主要成分和丙烯酸二环戊基丙烯酸酯作为主要成分和二环戊酯作为分子交联剂来合成MMS。然后通过水中的MMS交联丙烯酰胺（AM）和十六烷基丙烯酸己酯（HMA）以形成MM交联的聚（丙烯酰胺 - 共十六烷基甲基丙烯酸酯）（P（AM / HMA）-MM）水凝胶。从拉伸测量，与原始P（AM / HMA相比，P（AM / HMA）-mm水凝胶表现出骨折应力σ（F）（F）（F）（F）（F）（F）（F）（5533％）的剧烈增强（5533％） ）水凝胶。此外，P（AM / HMA）-MM水凝胶还具有优异的穿刺性能。基于传统的橡胶增韧塑料机制，很明显，MMS不仅可以防止裂缝的进一步发展，而且也可以拉伸以变形并吸收大量的能量。设想这一新颖的策略，灵感来自增韧机制，将是增强机械性能的有效方法，并扩大水凝胶的应用范围。

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  • 来源
    《RSC Advances》 |2016年第11期|共8页
  • 作者

    Ren Xiu Yan; Yu Zhe; Liu Baijun; Liu Xue Jiao; Wang Ya Jun; Su Qiang; Gao Guang Hui;

  • 作者单位

    Changchun Univ Technol Minist Educ Engn Res Ctr Synthet Resin &

    Special Fiber Changchun Peoples R China;

    Changchun Univ Technol Minist Educ Engn Res Ctr Synthet Resin &

    Special Fiber Changchun Peoples R China;

    Changchun Univ Technol Minist Educ Engn Res Ctr Synthet Resin &

    Special Fiber Changchun Peoples R China;

    Changchun Univ Technol Minist Educ Engn Res Ctr Synthet Resin &

    Special Fiber Changchun Peoples R China;

    Changchun Univ Technol Minist Educ Engn Res Ctr Synthet Resin &

    Special Fiber Changchun Peoples R China;

    Changchun Univ Technol Minist Educ Engn Res Ctr Synthet Resin &

    Special Fiber Changchun Peoples R China;

    Changchun Univ Technol Minist Educ Engn Res Ctr Synthet Resin &

    Special Fiber Changchun Peoples R China;

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