Skin-inspired self-healing polycaprolactone-based composite induced by photo/electro stimuli for highly absorb e d and stable electromagnetic interference shielding  

作　　者：Minghuan Hou Jian Wang 

机构地区：[1]School of Materials Science and Engineering,Xihua University,Chengdu 610039,China

出　　处：《Journal of Materials Science & Technology》2024年第30期171-182,共12页材料科学技术(英文版)

基　　金：supported by the Sichuan Science and Technology Program(Nos.2023YFG0210,2022YFG0276,24NSFSC1700).

摘　　要：The endeavor to attain prolonged stability and heightened electromagnetic interference shielding effec-tiveness(EMI SE)in polymer-matrix composites remains an arduous pursuit,particularly when subjected to external mechanical trauma or adverse environmental conditions.In this context,a self-healing and efficient EMI shielding polycaprolactone(PCL)composite with a unique electromagnetic gradient and interface-metalized segregated structure is assembled through layer-by-layer casting and a hot-pressing process.The combined effect of the induction of the electromagnetic gradient layer and the massive mul-tiple interface reflection and scattering from the segregated-like structure results in an exceptional EMI SE of 57.0 dB and a low reflection(R)value of only 0.28.Additionally,the composite boasts impressive photothermal and electrothermal properties,allowing for self-healing under solar irradiation or electri-cal stimulation.Remarkably,this self-healing capability has been demonstrated through five cutting and healing cycles,exhibiting an impressive EMI SE retention rate of 88%.Consequently,the composite with rapid photo/electro-driven self-healing properties will be able to maintain EMI shielding performance.

关 键 词：Polymer-matrix composites Multifunctional composites Photo/electro-driven SELF-HEALING Electromagnetic interference shielding 

分 类 号：TB3[一般工业技术—材料科学与工程]