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利用天然氨基酸小分子L-精氨酸作为还原剂兼保护剂,以硝酸银作前驱体,采用原位化学还原法绿色合成氨基酸纳米银。运用紫外-可见分光光度计、透射电子显微镜和X射线衍射技术对不同反应条件制备的纳米银进行表征,考察反应温度、反应时间、L-精氨酸/Ag NO3的摩尔比以及加料顺序对纳米银形貌、粒径分布及分散性能的影响,并通过调控反应条件得到粒径分布窄(10±2)nm、单分散近球形的纳米银颗粒。纳米银分散液采用刮涂制备膜层,测定膜层在不同烧结温度和时间条件下的电阻率,结果表明,纳米银膜层在170℃下烧结1 h,制得的导电膜可以获得较低的电阻率(16μΩ·cm)和较高的附着力(5 A)。
L-arginine, a natural amino acid small molecule, was used as reductant and protective agent, and silver nitrate was used as precursor to synthesize amino acid nanosilver by in situ chemical reduction. The nano-silver prepared under different reaction conditions was characterized by UV-visible spectrophotometer, transmission electron microscopy and X-ray diffraction. The effects of reaction temperature, reaction time, molar ratio of L-arginine to AgNO3, Silver morphology, particle size distribution and dispersion performance, and by adjusting the reaction conditions to obtain a narrow size distribution (10 ± 2) nm, monodisperse near-spherical nano-silver particles. The nano-silver dispersion prepared by scratch coating, the film measured at different sintering temperature and time under the conditions of resistivity, the results show that the nano-silver film at 170 ℃ for 1 h, the resulting conductive film can be obtained lower Resistivity (16 μΩ · cm) and high adhesion (5 A).