| 摘要: |
| 自修复导电弹性体在可穿戴设备领域有着巨大的应用潜力,但其导电性能和稳定性难以兼顾。 在自修复弹性体基材表面依次构建粗糙微米结构和金属导电层,构建形成新型导电弹性体(Ag / SiO2 / B-BZn-PDMS)。 制备获得基于硼酸酯/ 配位双交联的新型自修复有机硅弹性体(B-BZn-PDMS),其抗拉强度为 0. 52±0. 05 MPa,断裂伸长率 98±5%,6 h 室温修复率可达 98. 1%。 研究结果表明:双层导电层具有良好的导电性能(电阻 4 Ω),经过 11 次拉伸循环,导电性能仍然保持。 此外,Ag / SiO2 / B-BZn-PDMS 导电性能可在室温 20 min 自修复,电阻修复率可达 93%以上。 提出利用自修复弹性体以及粗糙结构构建柔性耐用导电弹性体的思路,为低成本高性能导电涂层开发提供了新的途径。 |
| 关键词: 动态键 自修复 导电 聚硅氧烷 |
| DOI：10.11933/j.issn.1007-9289.20210416001 |
| 分类号:TG456 |
| 基金项目:四川省科技厅资助项目(2020YJ0333) |
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| Stretchable and Foldable Self-healable Conductive Silicon Elastomer with Multi-layered Structure |
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SHAN Yuxing1, YANG Jingxin2, WANG Jin2, FU Yajun2, HU Chengyao2, YAN Hui3, HUANG Yawen1
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1.State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010 , China;2.School of Material Science and Engineering, Southwest University of Science and Technology, Mianyang 621010 , China;3.Mianyang Maxwell Technology Co., Ltd, Mianyang 621010 , China
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| Abstract: |
| Self-healable conductive elastomers have found great application potential in wearable devices. However, most of current self-healable conductive elastomers are difficult to combine high conductivity and good durability. A micro-structured bilayered conductive coating (Ag / SiO2 / B-BZn-PDMS) was fabricated by sequentially constructing microstructure and metal conductive layers. The self-healing elastomer was prepared with boronic ester/ coordination dual cross-linked network (B-BZn-PDMS). B-BZn-PDMS has the ultimate tensile strength and strain ratio at breaking of 0. 52 ± 0. 05 MPa and 98 ± 5%. The self-healing efficiency at room temperature for 6 h can reach to 98. 1%. The bilayered conductive structure exhibited good conductivity (R= 4 Ω). After 11 times of strain cycles, the good conductive performance was still remained. Moreover, after self-healing, the conductive performance of Ag / SiO2 / B-BZn-PDMS can be recovered at room temperature after 20 min. The self-healing efficiency was above 93%. Overall, a new idea is proposed to construct flexible durable conductive elastomer by introducing self-healable silicon elastomer and rough structure and a route is provided to conductive elastomer with low cost and high performance. |
| Key words: Dynamic bonds self-heal conductive polysiloxane |
