Nano silver prepared through low-temperature reducing of reducing sugar, preparing method of nano silver and application of nano silver to conductive ink

A conductive ink and nano-silver technology, applied in the application, ink, nanotechnology and other directions, can solve the problems of glucose carbonization deformation, easy gelatinization, difficult to use as a reducing agent of nano-silver, etc. good effect

Inactive Publication Date: 2017-05-31
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, glucose is easy to gelatinize at high temperature, and the original glucose after gelatinization is carbonized and deformed, so it is difficult to use as a reducing agent for preparing nano-silver

Method used

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  • Nano silver prepared through low-temperature reducing of reducing sugar, preparing method of nano silver and application of nano silver to conductive ink
  • Nano silver prepared through low-temperature reducing of reducing sugar, preparing method of nano silver and application of nano silver to conductive ink
  • Nano silver prepared through low-temperature reducing of reducing sugar, preparing method of nano silver and application of nano silver to conductive ink

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Add 50ml of deionized water to 0.7206g of anhydrous glucose and polyvinylpyrrolidone (PVP) (mass ratio: 2:1.5), put it on a constant temperature magnetic stirrer, heat it in a water bath at 50°C at 1500r / Min speed stirring 60min dubbed Solution A. Add 3 mol / L sodium hydroxide solution to silver nitrate (the molar ratio of silver nitrate and PVP is 1:1.5), adjust the pH to 11, and make dark brown suspension B. Add the suspension B into the solution A, stir at 50°C and 1500r / min, and the solution turns gray after 120 minutes of reaction to end the reaction. After the solution was cooled to room temperature, the solution was added to a centrifuge tube and centrifuged at a speed of 10000 r / min for 10 min. After centrifugation, pour out the supernatant, add absolute ethanol to the centrifuge tube, perform ultrasonic vibration to disperse, and then perform 10min centrifugation at a speed of 10000r / min for 3 times. Put the washed nano-silver in a small weighing bottle a...

Embodiment 2

[0039] (1) Add 50ml of deionized water to 0.4579g of anhydrous glucose and polyvinylpyrrolidone (PVP) (mass ratio: 2:1.5), put it on a constant temperature magnetic stirrer, heat it in a water bath at 60°C at 1500r / Min speed stirring 60min dubbed Solution A. Add 2 mol / L sodium hydroxide solution to silver nitrate (the molar ratio of silver nitrate and PVP is 1:1.5), adjust the pH to 11, and make dark brown suspension B. Add suspension B into solution A, stir at 60°C and 1500r / min, and the solution turns gray after 120 minutes of reaction to end the reaction. After the solution was cooled to room temperature, the solution was added to a centrifuge tube and centrifuged at a speed of 10000 r / min for 10 min. After centrifugation, the supernatant was poured out, absolute ethanol was added into the centrifuge tube, and ultrasonic vibration was performed to disperse, and then centrifuged at a speed of 10000r / min for 10min for 4 times. Put the washed nano-silver in a small weighing...

Embodiment 3

[0044] (1) Add 50ml of deionized water to 0.5666g of anhydrous glucose and polyvinylpyrrolidone (PVP) (ratio: 2:1) and put it on a constant temperature magnetic stirrer. Min speed stirring 80min dubbed Solution A. Add 2 mol / L sodium hydroxide solution to silver nitrate (the molar ratio of silver nitrate and PVP is 1:1), adjust the pH to 12, and make dark brown suspension B. Add the suspension B into the solution A, stir at 80°C and 2000r / min, and the solution turns gray after 150 minutes of reaction to end the reaction. After the solution was cooled to room temperature, the solution was added to a centrifuge tube and centrifuged at a speed of 12000 r / min for 12 min. After centrifugation, pour out the supernatant, add absolute ethanol into the centrifuge tube, perform ultrasonic vibration to disperse, and then perform 12min centrifugal cleaning at a speed of 12000r / min for 5 times. Put the washed nano-silver in a small weighing bottle and put it in an oven for drying. The tem...

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Abstract

The invention discloses nano silver prepared through low-temperature reducing of reducing sugar, a preparing method of the nano silver and application of the nano silver to conductive ink. The preparing method comprises the steps that water is added in the reducing sugar and polyvinylpyrrolidone to prepare a solution A; a sodium hydroxide solution is added to silver nitrate to adjust PH to prepare a solution B; and the solution B is added in the solution A, and after the reaction is over, centrifugal scattering, ultrasonic oscillation cleaning, drying and grinding are conducted, and then nano silver powder is obtained. The nano silver powder is mixed with a connecting agent and an addition agent, and water-based UV conductive ink is obtained after ultrasonic scattering. The glucose can be adopted as a reducing agent, and very large beneficial effects are achieved in the aspects of safety, environment friendliness, sustainability and the like. The glucose is utilized for low-temperature reducing of the silver nitrate, and the defect of degeneration and carbonization of the glucose at the high temperature can be overcome. Ultrasonic waves are adopted for cleaning nano silver suspension liquid, residues of the reducing agent are avoided, the conductive performance of the prepared conductive ink is better, and the conductive ink can be well applied to many fields of RFID antenna printing and the like.

Description

technical field [0001] The invention belongs to the field of conductive inks, and in particular relates to nano-silver prepared by low-temperature reduction of reducing sugars, a preparation method thereof, and an application in conductive inks. Background technique [0002] The development and popularization of the Internet and people's pursuit of a convenient life have accelerated the development and prosperity of the Internet of Things technology. The Internet of Things technology plays an important role in the logistics management aiming at realizing item tracking and information transmission, and radio frequency identification (RFID) technology is the key technology to realize the Internet of Things. The antenna is a key part of the RFID tag, and the reform of its production method benefits from the development of printed electronic technology. Among them, the research and development of conductive ink is of great significance to reduce the cost of antenna manufacturin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00C09D11/52B82Y40/00
CPCC09D11/52B82Y40/00B22F9/24B22F1/054
Inventor 陈奇峰刘谷红陈广学
Owner SOUTH CHINA UNIV OF TECH
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