Shenzhen Huake-tek Co., Ltd.

Xiping Zeng

Haibo Wang

Xiaoming Li

Shidong Jin

Gaili Yang

Jianlong Kang

Junqing Wu

This invention relates to the nano metal material preparation technology field, especially to the preparation method of one kind, of nano-rings. This invention uses polyvinyl pyrrolidone of different molecular weights as surface-protecting agent and dissolves silver nitrate in the low molecular weight polyvinyl pyrrolidone ethylene glycol solvent under frozen conditions. Frozen conditions can slow down or inhibit silver ions from being reduced to zero-valent silver, to generate silver nanoparticles coated and complexed with both low and high molecular weight polyvinyl pyrrolidone. Polyvinyl pyrrolidone of different molecular weight shows different selective absorption of silver, and different stability makes it affect the speed of growth of silver atoms along different crystal faces to different extent, which is better for silver nano-ring production, with higher yield. Silver nano-rings made from this invention features perfect circular shape, smooth surface, oval cross-section, and great crystal structure, and can be used as transparent flexible conductive material.

Method for preparing silver nano-rings

The invention belongs to the technical field of electrochromic devices, particularly relates to a novel electrochromic film material, and further discloses an electrochromic film device prepared by the novel electrochromic film material. According to the electrochromic film device provided by the invention, the electrochromic film material is prepared by taking a high adhesive-property composition and a redox-type liquid-state electrochromic composition as raw materials for the first time, and the redox-type liquid-state electrochromic composition is dispersed and cured between conductive substrates by a curing reaction of the high adhesive-property composition. After a test, electrochromic response time of the electrochromic film device prepared by the invention is between 7-11 seconds, number of cycles is between 14-160,000 times, and color difference b value is between &#x2212;20 and +30. It has a high color changing speed, long service life and stable performance, with a maximum cycle life reaching 160,000 times, and has good application performance.

Electrochromic film material and electrochromic film device prepared therefrom

A flexible conductive film is comprised of a flexible base and a conductive layer coated on it. The flexible base uses Surlyn resin as the matrix. It uses silver nanowire as the conductive layer.

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Shenzhen, China

Xiping Zeng