A mussel-inspired functionalization method was developed to improve the dispersibility and compatibility of silver-coated silica (SiO₂/Ag) microspheres in silicone rubber matrix; at the same time, the high conductivity of the microspheres was maintained. The poly(dopamine) (PDA) layer was deposited on SiO₂/Ag surface by spontaneous polymerization of dopamine. The SEM images showed that the SiO₂/Ag/PDA microspheres are uniformly distributed and firmly integrated with silicone rubber. The PDA layers effectively improved the interfacial interaction between fillers and rubber matrix. The electrical resistivity of the SiO₂/Ag/PDA/MVQ composites can be well controlled by adjusting the dopamine deposition time. Due to the favorable dispersibility and compatibility of the SiO₂/Ag/PDA in the rubber matrix, the composites exhibited a dramatic increase in tensile strength (47%) and maintained their low electrical resistivity of 8.3 × 10^–3 Ω·cm in the meanwhile at dopamine deposition time of 8 h. This approach can be extended to modify other particles to improve their compatibility in matrix.

中文翻译：

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贻贝启发的官能化作用制备的银包覆二氧化硅微球的表面改性及其在硅橡胶中的应用性能

开发了一种贻贝启发的官能化方法，以改善涂银的二氧化硅（SiO ₂ / Ag）微球在硅橡胶基质中的分散性和相容性。同时，保持了微球的高电导率。通过多巴胺的自发聚合，将聚（多巴胺）（PDA）层沉积在SiO ₂ / Ag表面上。SEM图像表明SiO ₂ / Ag / PDA微球均匀分布并与硅橡胶牢固结合。PDA层有效地改善了填料与橡胶基体之间的界面相互作用。SiO _2的电阻率通过调整多巴胺的沉积时间，可以很好地控制/ Ag / PDA / MVQ复合材料。由于一氧化硅的良好的分散性和相容性₂ /银/ PDA在橡胶基质中，复合材料表现出在抗张强度的显着增加（47％）并保持8.3×10它们的低电阻率^-3 Ω·cm的在同时多巴胺沉积时间为8 h。可以扩展此方法以修改其他粒子，以提高其在基质中的相容性。