METHOD FOR PRODUCING SILVER NANOPARTICLES

PROBLEM TO BE SOLVED: To provide a method for producing silver nanoparticles whose safety is improved by improving an amine complex decomposition method to control a rate of gas generation during the reaction.SOLUTION: The method for producing silver nanoparticles comprises: a first step of generati...

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Hauptverfasser: FUKUYA SATOMI, ASABE YOSHIYUKI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a method for producing silver nanoparticles whose safety is improved by improving an amine complex decomposition method to control a rate of gas generation during the reaction.SOLUTION: The method for producing silver nanoparticles comprises: a first step of generating a complex compound derived from a silver compound which can generate metallic silver by decomposition by heating, an alkylamine, and a compound containing in a molecule at least one of a multiple bond between a carbon atom and a heteroatom or a multiple bond between heteroatoms; a second step of adding a solvent which has a boiling point of 100 degrees Celsius or more, can dissolve a portion of the complex compound, and can decrease viscosity by addition of the solvent; and a third step of generating silver nanoparticles covered with a protective film containing the alkylamine by thermolysis of the complex compound by heating the reaction system. Because a portion or all of the complex compound, which is a source of gas generation, is dissolved in the solvent and the system approaches a homogeneous state, the pace of gas generation in the third step is controlled to improve safety of the process in mass production.SELECTED DRAWING: Figure 1 【課題】アミン錯体分解法を改善して、反応中のガスの発生速度を制御することによって、安全性を高めた銀ナノ粒子の製造方法を提供する。【解決手段】加熱により分解して金属銀を生成しうる銀化合物と、アルキルアミンと、分子内に炭素原子とヘテロ原子との多重結合またはヘテロ原子同士の多重結合の少なくとも一方を含む化合物と、に由来する錯化合物を生成させる第1工程と、沸点が摂氏100度以上であって錯化合物の一部を溶解可能で溶媒を加えることで粘度が低下な溶媒を添加する第2工程と、反応系を加熱して錯化合物を加熱分解して、アルキルアミンを含む保護膜で被覆された銀ナノ粒子を生成する第3工程と、を含むことを特徴とする銀ナノ粒子の製造方法。ガスの発生源である錯化合物の一部または全部が溶媒に溶解して、反応系が均一に近づくので、第3工程で気体の発生するペースが制御されて、大量製造時の工程の安全性が向上する。【選択図】図1