Preparation Of Nanometer Copper Ink And Its Composites For Printed Electronics Technology

Printing electronic technology is a new type of green manufacturing technologydeveloped in recent years,that is use printing technology that is suitable for differentfunctional ink print the ink on all kinds of base material process.The main advantage of usingthis technology is that can product and manufacture the large areas of flexible electronics andelectronic products that has a lower production cost.It can be used for printing printed imagesand micro nano-optical devices in the field of optical engineering.However,the preparation ofmarket demand of various functional ink restricts the development of printing technologyresearch.There have been manufacturers achieve the nanometer metal wire by electronictechnology print the ink in foreign country,particularly on the PCB board system.Recently, thesilver conductive ink is the most mature nano-metal conductive ink, it has achievedindustrialization.However, the price of silver nano-particles is higher,the price advantage ofnanometer copper is obvious compared with metallic silver, but its disadvantages of easyoxidized in the air is still a difficult problem in mass production.This topic made form thenano-copper gel by liquid chemical reduction method，And to deal with it, made fromnanometer copper ink.Finally we try to associate it with carboxyl carbon nanotubes forcomposite, to improve the conductivity and oxidation resistance.if applied it in the project ofsurface acoustic wave RFID tags mass production,the production cost can greatly reduce,and it have a great of significance for the promotion of electronic conductive ink printing.In this paper, we prepared a certain concentration of cupric chloride solution withdeionized water, next made solution become copper ammonia solution through addingammonia adjust the solution pH value after adding dispersing agent PVP and complexingagent CTAB. Then, add hydrazine hydrate that has the strong reducibility of hydrazinehydrate in alkaline environment in the preparation of alkaline solution, Then put the copperions reduction, preparation of nanometer copper colloid.In order to get good uniformity andsmaller particle size of nanometer colloid of copper in the experiment.First of all,Under thecondition of invariable in his reaction conditions, we determined the best experimentalconditions by changing the single reaction factors,such as,solution pH, reaction time, stirringspeed and reaction temperature and related conditions,determining the appropriate dosage ofdispersants and complexing agent in the reaction process, etc further.Then, determining thebest experimental plan by comparing the response of the preparation of nanometer copperparticle size of nanometer copper, and preparation of the50-100nm size of nanometer copperpowder.And on the basis of experiment, we composited with the acidification of carbonnanotube and nanometer copper. Finally,we Verified the nanometer copper that prepared of n this paper can meet mostof the printing electronic technology applications by applying four point probe and thetest,XRD, SEM method.And we verified nano-copper with carboxyl carbon nanotubes can becomplex, and its complex conductivity2times higher than the nanometer copper powder byfour point probe and verified by means of TEM test method, it can also be used as afunctional inks printed electronics technology.