| 徐秀凤,刘健,谢蒙蒙,党蕊,王珊.化学通报,2023,86(11):1376-1382. |
| 球形微米镍颗粒的液相体系制备及应用 |
| Preparation and application of spherical nickel micron-particles in liquid phase system |
| 投稿时间：2023-03-22 修订日期：2023-06-27 |
| DOI： |
| 中文关键词: 微米镍颗粒 磁性材料 液相还原法 形貌控制 导电油墨 |
| 英文关键词:Nickel micron-particles, Magnetic material, Liquid phase reduction, Controllable morphology, Conductive inks |
| 基金项目:陕西省创新能力支撑计划项目(2022KJXX-81)、西安市博士后创新基地科研项目、陕西省自然科学基金基础研究项目(2022JM-236)、陕西省教育厅科学研究专项计划(22JK0589)和西藏自治区自然科学基金项目(XZ202101ZR0086G)资助 |
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| 中文摘要: |
| 本研究采用液相还原法,选用六水合硫酸镍为镍源,水合肼为还原剂,在封端剂聚乙烯吡咯烷酮的辅助下,制备得到球形微米镍颗粒。所制备的球形微米镍颗粒粒径约为3 μm,粒径分布均匀,表面粗糙度较低。为了获得球形微米镍颗粒的最优工艺方案,分别探究了PVP浓度、氢氧化钠和水合肼用量及反应温度等工艺参数对产物形貌的影响。研究发现,PVP能够有效控制镍原子的排布和沉积,NaOH可调节反应的pH值,确保水合肼持续还原Ni2+,温度会影响体系的还原反应速率。结果表明：当反应体系使用的PVP浓度为0.5 M、NaOH用量为2.5 mL、水合肼用量为5 mL时,在 60 ℃下水浴反应可获得表面粗糙度低的球形微米镍颗粒,其电导率为5×105 S.m-1,饱和磁化强度为49.34 emu.g-1。通过添加去离子水、异丙醇和羧甲基纤维素的混合溶液,将球形微米镍颗粒配制成25 wt%的导电油墨,并在纸基表面绘制导电线路,经测试该线路的电导率为1.28×103 S.m-1,此电路在弯折条件下,呈现出良好的工作稳定性。 |
| 英文摘要: |
| In this study, special nickel micron-particles are synthesized via the liquid phase reduction method using polyvinyl pyrrolidone as capping agent, nickel hexahydrate as nickel source and hydrazine hydrate as reductant. The diameter of special nickel micron-particles is about 3 μm with uniform distribution and low surface roughness. In order to obtain the optimal scheme of special nickel micron-particles, the effects of the concentration of PVP, the amount of sodium hydroxide and hydrazine hydrate as well as reaction temperature on the morphology were investigated. It was found that PVP could control the arrangement and deposition of nickel atoms, NaOH was used for adjusting the pH to ensure the sufficient reducibility of hydrazine hydrate, and reaction temperature would affect the reduction rate. The results show that the special nickel micron-particles with low surface roughness, conductivity of 5×105 S.m-1 and saturation magnetization of 49.34 emu.g-1 can be obtained in water-bath at 60 ℃, when the concentration of PVP is 0.5 M, the amount of NaOH is 2.5 mL, and the amount of hydrazide hydrate is 5 mL. Through mixing deionized water, isopropyl alcohol, carboxymethyl cellulose and the special nickel micron-particles, 25 wt% conductive ink was prepared. Then it was drawn on the paper to make circuit. The measured conductivity is 1.28×103 S.m-1, and the circuit displays well working stability under bending state. |
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