Solid–Liquid Self-Adaptive Polymeric Composite

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• 作者：Pei Dong ; Alin Cristian Chipara ; Phillip Loya ; Yingchao Yang ; Liehui Ge ; Sidong Lei ; Bo Li ; Gustavo Brunetto ; Leonardo D. Machado ; Liang Hong ; Qizhong Wang ; Bilan Yang ; Hua Guo ; Emilie Ringe ; Douglas S. Galvao ; Robert Vajtai ; Mircea Chipara ; Ming Tang ; Jun Lou ; Pulickel M. Ajayan
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：January 27, 2016
• 年：2016
• 卷：8
• 期：3
• 页码：2142-2147
• 全文大小：380K
• ISSN：1944-8252

文摘

A solid–liquid self-adaptive composite (SAC) is synthesized using a simple mixing–evaporation protocol, with poly(dimethylsiloxane) (PDMS) and poly(vinylidene fluoride) (PVDF) as active constituents. SAC exists as a porous solid containing a near equivalent distribution of the solid (PVDF)–liquid (PDMS) phases, with the liquid encapsulated and stabilized within a continuous solid network percolating throughout the structure. The pores, liquid, and solid phases form a complex hierarchical structure, which offers both mechanical robustness and a significant structural adaptability under external forces. SAC exhibits attractive self-healing properties during tension, and demonstrates reversible self-stiffening properties under compression with a maximum of 7-fold increase seen in the storage modulus. In a comparison to existing self-healing and self-stiffening materials, SAC offers distinct advantages in the ease of fabrication, high achievable storage modulus, and reversibility. Such materials could provide a new class of adaptive materials system with multifunctionality, tunability, and scale-up potentials.