Preparation of silver-coated polystyrene microspheres intermediated with polyaniline and their application in array-patterned anisotropic conductive films

IF 23.2 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Advanced Composites and Hybrid Materials Pub Date : 2024-12-21 DOI:10.1007/s42114-024-01160-6
Changxiang Hao, Junde Chen, Yonghao Chen, Chengwei Jiang, Ziqiang Wang, Tingting Pan, Xing Cheng, Yanqing Tian
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Abstract

Array-patterned anisotropic conductive films (A-ACFs) possessing periodically arranged conductive particles distributed in curable resins can have high circuit-bonding precision; however, the preparation of A-ACFs is a challenging work. On the other hand, the traditional electrolysis coating of metal on polymer cores as the conductive particles needs long preparation steps. Herein, a new simplified approach uses polyaniline (PANI) as an intermediate layer to wrap the polystyrene (PS) microspheres and also chelate silver to prepare silver-coated PS microspheres (PS@PANI@Ag). Through a series of experimental regulation, neat PS@PANI@Ag microspheres with an average diameter of 4.73 ± 0.13 μm possessing a silver layer of about 65 nm and weight percentage of 23.6% were prepared. For developing A-ACFs, an approach is loading the prepared particles into the microcavities with a diameter of 6 μm and depth of 4 μm in silicon template through rubbing assembly process, transferring these particles onto the surface of a kind of chosen polymerizable acrylate resin to keep their periodicity, and embedding these particles in the polymeric resin films. These A-ACFs were used to bond indium-tin-oxide (ITO) and flexible-printed circuits (FPC) with 200-μm spacing to achieve low connection resistance of 1.78 ± 0.03 Ω/0.4 mm2 and high insulation resistance over 200 MΩ. After aging at 85 °C and 85% relative humidity condition for 120 h, the connection resistance change is less 9.8%, showing the bonded device’s good environmental stability. The anisotropic property was also demonstrated using a homemade device through turning LEDs on or off. Therefore, the conductive particles’ and A-ACFs’ preparation methods may provide new insights for ACFs’ designing strategy and application in industry.

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以聚苯胺为中间体的银涂层聚苯乙烯微球的制备及其在阵列图案各向异性导电薄膜中的应用
具有周期性排列的导电颗粒分布于可固化树脂中的阵列型各向异性导电膜具有较高的电路键合精度;然而,a - acfs的制备是一项具有挑战性的工作。另一方面,传统的电解涂层在聚合物芯上作为导电颗粒,需要较长的制备步骤。本文采用一种新的简化方法,利用聚苯胺(PANI)作为中间层包裹聚苯乙烯(PS)微球,并与银螯合制备银包被的PS微球(PS@PANI@Ag)。通过一系列的实验调控,制备了平均直径为4.73±0.13 μm,银层厚度约为65 nm,重量率为23.6%的整洁PS@PANI@Ag微球。制备a - acfs的方法是通过摩擦组装工艺将制备好的颗粒装入直径为6 μm、深度为4 μm的硅模板微腔中,并将其转移到一种可聚合丙烯酸酯树脂表面以保持其周期性,并将其包埋在聚合物树脂薄膜中。这些A-ACFs用于连接间距为200 μm的铟锡氧化物(ITO)和柔性印刷电路(FPC),可获得1.78±0.03 Ω/0.4 mm2的低连接电阻和200 MΩ以上的高绝缘电阻。在85℃、85%相对湿度条件下老化120h后,连接电阻变化小于9.8%,表明该键合器件具有良好的环境稳定性。利用自制装置,通过打开或关闭led,证明了其各向异性。因此,导电颗粒和A-ACFs的制备方法可能为ACFs的设计策略和工业应用提供新的见解。图形抽象
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文献相关原料
公司名称
产品信息
阿拉丁
Ammonium Persulfate ((NH4)2S2O8, APS)
阿拉丁
Glucose (C6H12O6)
阿拉丁
Aniline Hydrochloride (C6H5NH2-HCl)
阿拉丁
Ammonia (NH3·H2O, 28%)
阿拉丁
Silver Sulfate (Ag2SO4)
阿拉丁
Ammonium persulfate ((NH?)?S?O?, APS)
阿拉丁
Glucose (C?H??O?)
阿拉丁
Aniline hydrochloride
阿拉丁
Ammonia
阿拉丁
Silver sulfate (Ag?SO?)
来源期刊
CiteScore
26.00
自引率
21.40%
发文量
185
期刊介绍: Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.
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