Exploiting the role of nanoparticle shape in enhancing hydrogel adhesive and mechanical properties
Exploiting the role of nanoparticle shape in enhancing hydrogel adhesive and mechanical properties
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DOI：
10.1038/s41467-020-15206-y
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发表时间：
2020-03-17
影响因子：
16.6
通讯作者：
O'Reilly, Rachel K.
中科院分区：
文献类型：
--
作者：
Arno, Maria C.;Inam, Maria;O'Reilly, Rachel K.
控制纳米结构形状和尺寸的能力为设计材料提供了机会，在这种材料中，其宏观性能取决于纳米颗粒的性质。虽然颗粒形态被认为是一个重要的参数，但到目前为止，对潜在的形状相关特性的开发一直受到限制。在这里，我们证明了纳米颗粒的形状是决定纳米复合水凝胶性能的一个关键因素。使用平移相关的海藻酸钙水凝胶，我们发现使用具有片状形态的基于聚L-丙交酯的纳米颗粒作为粘附剂，显著增强了由球形或圆柱形胶束组成的纳米颗粒胶体的粘附性。此外，与球形和圆柱形相比，含有血小板的凝胶纳米复合材料在应变下表现出更强的抗断裂能力。这项研究为凝胶纳米复合材料领域的方向改变打开了大门，在凝胶纳米复合材料领域，纳米颗粒的形状在调节机械性能方面发挥着重要作用。
The ability to control nanostructure shape and dimensions presents opportunities to design materials in which their macroscopic properties are dependent upon the nature of the nanoparticle. Although particle morphology has been recognized as a crucial parameter, the exploitation of the potential shape-dependent properties has, to date, been limited. Herein, we demonstrate that nanoparticle shape is a critical consideration in the determination of nanocomposite hydrogel properties. Using translationally relevant calcium-alginate hydrogels, we show that the use of poly(L-lactide)-based nanoparticles with platelet morphology as an adhesive results in a significant enhancement of adhesion over nanoparticle glues comprised of spherical or cylindrical micelles. Furthermore, gel nanocomposites containing platelets showed an enhanced resistance to breaking under strain compared to their spherical and cylindrical counterparts. This study opens the doors to a change in direction in the field of gel nanocomposites, where nanoparticle shape plays an important role in tuning mechanical properties.