3D Printed Multifunctional, Hyperelastic Silicone Rubber Foam
3D Printed Multifunctional, Hyperelastic Silicone Rubber Foam
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DOI：
10.1002/adfm.201900469
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发表时间：
2019-06-01
影响因子：
19
通讯作者：
Advincula, Rigoberto C.
中科院分区：
文献类型：
--
作者：
Chen, Qiyi;Zhao, Jiayu;Advincula, Rigoberto C.
高弹性有机硅泡沫，特别是那些具有可调性能和多功能性的有机硅泡沫，在许多领域都引起了极大的兴趣。然而，有机硅前体的液体性质和复杂的发泡过程阻碍了其三维（3D）可印刷性的实现。在此，通过直接墨水书写产生了一系列在弹性、润湿和传感特性、多功能性和可调谐性方面具有出色性能的有机硅泡沫。粘弹性油墨是通过将氯化钠直接分散在独特的有机硅前体溶液中实现的。3D结构的硅橡胶具有开孔的三峰孔隙率，可提供超弹性、超压缩性/循环耐久性（在90%压缩或1000次压缩循环下应力/应变损失接近零）、优异的拉伸性（210%应变）和超疏水性。所得到的泡沫被证明是多功能的，这样它可以作为一个石油吸附剂与超级容量（1320%）和可定制的软传感器后，碳纳米管吸附在泡沫表面。该策略实现了机械强度、弹性、拉伸性和吸收能力的可调性，同时将不同材料打印在一起提供属性梯度作为可调性的额外维度。实现了第一个3D打印的有机硅泡沫，这是其应用扩展的重要一步。
Highly elastic silicone foams, especially those with tunable properties and multifunctionality, are of great interest in numerous fields. However, the liquid nature of silicone precursors and the complicated foaming process hinder the realization of its three-dimensional (3D) printability. Herein, a series of silicone foams with outstanding performance with regards to elasticity, wetting and sensing properties, multifunctionality, and tunability is generated by direct ink writing. Viscoelastic inks are achieved from direct dispersion of sodium chloride in a unique silicone precursor solution. The 3D-architectured silicone rubber exhibits open-celled trimodal porosity, which offers ultraelasticity with hyper compressibility/cycling endurance (near-zero stress/strain loss under 90% compression or 1000 compression cycles), excellent stretchability (210% strain), and superhydrophobicity. The resulting foam is demonstrated to be multifunctional, such that it can work as an oil sorbent with super capacity (1320%) and customizable soft sensor after absorption of carbon nanotubes on the foam surface. The strategy enables tunability of mechanical strength, elasticity, stretchability, and absorbing capacity, while printing different materials together offers property gradients as an extra dimension of tunability. The first 3D printed silicone foam, which serves an important step toward its application expansion, is achieved.