A macro-preparation method of polyvinylpyrrolidone-modified nano-silver wire powder

Abstract

A macro-preparation method of polyvinylpyrrolidone-modified nano-silver wire powder, comprising uniformly mixing an ethylene glycol solution of silver nitrate, a chloride-containing salt, and polyvinylpyrrolidone in ethylene glycol to obtain a mixed solution; wherein, silver nitrate, The molar ratio of chloride salt to PVP is 1:(0.0001~0.0006):(1.5~2); the mixed solution is hydrothermally reacted at 160~200°C for 8~12 hours, cooled, vacuum filtered until dry, washed and dried to obtain Polyvinylpyrrolidone modified nano silver wire powder. The invention has simple process, good repeatability, no special equipment such as spray drying, and can prepare nano-silver wire powder in a large amount. It makes up for the shortcomings of current nano-silver wire products that are not easy to preserve and the preparation process of nano-silver wire powder is complicated.

Description

technical field [0001] The invention belongs to the technical field of nano-material production technology, and relates to a macro-preparation method of polyvinylpyrrolidone-modified nano-silver wire powder. Background technique [0002] Nanosilver wire is an important one-dimensional nanomaterial with stable physical and chemical properties, and has excellent performance in the fields of optoelectronics, catalysis, and antibacterial. For example, in the field of transparent conductive films, due to the high cost of ITO, nano silver wires have become an effective substitute for ITO to prepare transparent conductive films due to their high electrical conductivity and high light transmittance. [0003] At present, the preparation method of silver nanowires is mainly based on the polyol method proposed by Xia Younan et al. The process is stable and the research is more in-depth. The method mainly uses polyols as reducing agents to synthesize silver nanowires under the induction...

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Problems solved by technology

However, the mixed solvent used in this method is less safe under high temperature conditions, and special treatments such as centrifugation and spray drying are required to obtain nano-silver wire powder, and the process is complicated.

[0005] At present, most methods need to use special equipment such as spray drying in the process of obtaining nano-silver wire powder. The production process is complicated, the cost is high, and the dispersibility of the powder is poor.

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