Soft Viscoelastic Magnetic Hydrogels from the In Situ Mineralization of Iron Oxide in Metal-Coordinate Polymer Networks,ACS Applied Materials & Interfaces

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Soft Viscoelastic Magnetic Hydrogels from the In Situ Mineralization of Iron Oxide in Metal-Coordinate Polymer Networks
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-11-02 , DOI: 10.1021/acsami.3c08145
Jake Song , Sungjin Kim , Olivia Saouaf , Crystal Owens , Gareth H McKinley , Niels Holten-Andersen ₁

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The design of soft magnetic hydrogels with high concentrations of magnetic particles is complicated by weak retention of the iron oxide particles in the hydrogel scaffold. Here, we propose a design strategy that circumvents this problem through the in situ mineralization of iron oxide nanoparticles within polymer hydrogels functionalized with strongly iron-coordinating nitrocatechol groups. The mineralization process facilitates the synthesis of a high concentration of large iron oxide nanoparticles (up to 57 wt % dry mass per single cycle) in a simple one-step process under ambient conditions. The resulting hydrogels are soft (kPa range) and viscoelastic and exhibit strong magnetic actuation. This strategy offers a pathway for the energy-efficient design of soft, mechanically robust, and magneto-responsive hydrogels for biomedical applications.

中文翻译：

金属配位聚合物网络中氧化铁原位矿化产生的软粘弹性磁性水凝胶

由于水凝胶支架中氧化铁颗粒的保留能力较弱，具有高浓度磁性颗粒的软磁性水凝胶的设计变得复杂。在这里，我们提出了一种设计策略，通过在用强铁配位硝基儿茶酚基团功能化的聚合物水凝胶中氧化铁纳米颗粒的原位矿化来解决这个问题。矿化过程有利于在环境条件下通过简单的一步过程合成高浓度的大型氧化铁纳米粒子（每个循环高达 57 wt% 干质量）。所得水凝胶柔软（kPa 范围）和粘弹性，并表现出强磁驱动。该策略为生物医学应用的柔软、机械坚固和磁响应水凝胶的节能设计提供了一条途径。

更新日期：2023-11-02

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