Research and Manufacture of Nano-Silver Conductive Ink

2010 ◽  
Vol 174 ◽  
pp. 405-408 ◽  
Author(s):  
Bao Lin Tang ◽  
Guang Xue Chen ◽  
Qi Feng Chen ◽  
Jing Lei Tai
Keyword(s):  
Chemical Reduction ◽  
Nitrate Solution ◽  
Acrylic Resin ◽  
Silver Nitrate Solution ◽  
Nano Particles ◽  
Conductive Ink ◽  
Surface Protection ◽  
Nano Silver ◽  
Conductive Fillers ◽  
Liquid Chemical

Printing electronics technology promotes the application of conductive ink. In this paper, the manufacture of nano-sliver conductive ink is investigated. First, Spherical silver nano-particles were reduced from silver nitrate solution by liquid chemical reduction method, with hydrazine hydrate as reductant and PVP as surface-protection reagent. SEM was used to characterize the morphology of silver powders, and the mean particles size is 62.79 nm. Then, conductive ink was prepared with nano-silver particles made in this research as conductive fillers, polyurethane resin and acrylic resin as binders, and stearic acid as dispersant. In the last, the conductive ink was printed on the PCB substrate by screening printing. After the ink is dried, conductivity, abrasion resistance, and adhesion were tested. The experiment results shows that the order of sheet resistivity magnitude is 10-4Ω•m, the number of rubbing fastness is more than 6000, and the adhesion can be resisted repeatedly to tape tear.

Preparation of Water-Based Nano-Silver Gravure Conductive Ink Used for Printed Electronics

2012 ◽  
Vol 262 ◽  
pp. 523-526 ◽  
Author(s):  
Wei Wei Li ◽  
Li Xin Mo ◽  
Ji Lan Fu ◽  
Wen Bo Li ◽  
Jun Ran ◽  
...  
Keyword(s):  
Surface Resistance ◽  
Printed Electronics ◽  
Silver Content ◽  
Chemical Reduction ◽  
Conductive Ink ◽  
High Concentration ◽  
Silver Colloids ◽  
Nano Silver ◽  
Water Based ◽  
Liquid Chemical

Printed electronic industry develops fast and has great potential. In order to prepare water-based nano-silver gravure conductive ink used for printed electronics, liquid chemical reduction method is used. Ag+(5.89M) at high concentration acting as the precursor is reduced by hydrazine hydrate with PVP as the protecting agent. For one time of reaction, silver content of 9.25% is obtained. After washing and centrifuging the silver colloids for three times to purity, some amount of deionized water, resin and additives are added to the silver paste to fabricated water-based nano-silver conductive ink for gravure. Then, samples obtained by coating or proofing are dried and surface resistance and adhesion are measured. The results indicated that the silver particles prepared have size of about 50~100nm and most of the particles are spherical with small amount nanoplates. The nano-silver gravure conductive ink has 52.63% silver content and 3.58% PVP. Surface resistance of samples coated after sintering at 120°C for 30s can reach 129.5mΩ/sq and the resistivity is 1.49×10-4Ω.cm. The ink layer surface has no drop after 3M method which indicating good adhesion. The ink is suitable for gravure and can be used in printed electronics.

Research on Preparation of Nano-Silver by Orthogonal Test

2011 ◽  
Vol 694 ◽  
pp. 142-145
Author(s):  
Bao Lin Tang ◽  
Guang Xue Chen ◽  
Qi Feng Chen ◽  
Jing Lei Tai
Keyword(s):  
Hydrazine Hydrate ◽  
Chemical Reduction ◽  
Orthogonal Test ◽  
Nano Particles ◽  
Molar Ratio ◽  
Surface Protection ◽  
Nano Silver ◽  
Potential Applications ◽  
Medical Electronic ◽  
Average Size

Nano-silver has received a great deal of attention in recent years for its various potential applications on medical, electronic, optical, etc. In this paper, we developed a simple way to synthesize nano-sized silver by liquid chemical reduction method with hydrazine hydrate as reductant and PVP as surface-protection reagent. In the experimental design, orthogonal test with three factors and three levels is adopted, which investigated the effect of instillation method, the PVP amount and the reaction temperature on the size and morphology of silver nano-particle. Through analyzing the orthogonal experimental results, the optimum conditions for nano-silver preparation is obtained, in which hydrazine hydrate solution is instilled into the mixture solution of silver nitrate and PVP, the molar ratio of PVP/AgNO3 is 1.5, and the temperature is 50°C. Scanning electron microscopy was used to characterize the morphology of silver nano-particles, and the results show that the dispersed spherical nano-particles with the average size of about 60 nm can be prepared in this work.

Synthesis of Mono-Dispersed Fine Spherical Silver Powders by Chemical Reduction Method

2007 ◽  
Vol 539-543 ◽  
pp. 2782-2786 ◽  
Author(s):  
Jong Gwan Ahn ◽  
Dong Jin Kim ◽  
Jae Ryeong Lee ◽  
H.S. Jung ◽  
Byoung Gyu Kim
Keyword(s):  
Reduction Method ◽  
Chemical Reduction ◽  
Silver Powder ◽  
Nitrate Solution ◽  
Particle Morphology ◽  
Silver Nitrate Solution ◽  
Phase Method ◽  
Metal Powders ◽  
Chemical Reduction Method ◽  
Liquid Phase Method

The synthesis of spherical silver powders by chemical reduction method was investigated. Conductive metal pastes to have good properties in adhesion, stability, and conductivity, it is very important to control the purity, size, and shape of metal particles. In the present study, proper methods to control the properties of micron sized metal powders for conductive pastes are investigated. Chemical reduction method in aqueous solution was adapted to produce silver powder. The effects of reaction time, concentration of reductant and additives, and stirring speed were investigated, in experimental. Fine spherical silver powder of 0.5 to 3 ㎛ were synthesized from silver nitrate solution with hydroquinone as a reducing additive by liquid phase method, and some variables and reaction mechanism in conjunction with the particle morphology and size were studied.

Investigation on Post Treatment of Nano-Size Silver Conductive Film

2012 ◽  
Vol 262 ◽  
pp. 470-474
Author(s):  
Wen Zhao ◽  
Lu Hai Li ◽  
Xu Wei Hu ◽  
Li Xin Mo
Keyword(s):  
Silver Nitrate ◽  
Hydrazine Hydrate ◽  
Nitrate Solution ◽  
Silver Nitrate Solution ◽  
Treatment Method ◽  
Post Treatment ◽  
High Conductivity ◽  
Conductive Ink ◽  
Conductive Film ◽  
Nano Size

This paper provides a novel post treatment method to achieve high conductivity of nano-size silver coatings. Based on the preparation of nano-size conductive ink and conductive circuit, the printed sample and the coated conductive film were treated by series concentrations of silver nitrate solution and hydrazine hydrate solution in this order. The samples were dipped in 1%~20% solutions of silver nitrate and hydrazine hydrate successively, to form the new conductive layer of Ag particles only. It was investigated that the relationship between the thickness of printed and coated layers on photo paper and final conductivity after dipped in two kinds of solutions in turn, which were printed from one to three times and coated by screw (6#). Atomic force microscopy (AFM) was used to characterize the morphologies of as printed and coated samples. The surface sheet resistance of sample was tested by four-probe tester. It was found that when the coated silver conductive ink samples were dipped in 2% silver nitrate solutions and 2% hydrazine hydrate solution at room temperature, the conductivity reaches 0.82Ω/□. The samples with thicker conductive film before dipping need solutions at lower concentration to get high conductivity. The roughness of samples after treatment falls down, as the concentrate of dipping solutions rising. It is therefore considered that the “dip in” method provides an efficient alternative to improve the conductivity of samples.

Preparation, Structure and Properties of High Performance Silver-Filled UV-Curable Polyurethane Acrylate Conductive Inks

2013 ◽  
Vol 469 ◽  
pp. 59-63 ◽  
Author(s):  
Guang Xue Chen ◽  
Yan Yan Cui ◽  
Yu Yang ◽  
Qing Wang
Keyword(s):  
Polyethylene Glycol ◽  
Metal Nanoparticles ◽  
High Performance ◽  
Chemical Reduction ◽  
Nitrate Solution ◽  
Film Surface ◽  
Silver Nitrate Solution ◽  
Uv Curable ◽  
Conductive Inks ◽  
Pet Film

In this paper, polyethylene glycol thioglycolate was prepared by esterfication. Spherical silver nanoparticles were formed from silver nitrate solution by liquid chemical reduction method with hydrazine hydrate as reducant. Based on the previous two steps, the nanoAg was absorbed by the polyethylene glycol thioglycolate trough the deposition. Metal nanoparticles were absorbed by polyethylene glycol thioglycolate with M-S bond to form polymer modified nanoparticle powder. The conductive inks were prepared using modified nanoparticles, other filler and laborator self-made water-borne polyurethane resin as the bonding material. Then the ink was coated on the PET film surface to mold. Catalyst, temperature and time effected esterfication. The esterfication rate was about 55% at 110°C for 3 hours. XRD indicated that the nanoAg prepared were cubic crystals, TEM showed that the size of modified nanoAg was less than 10nm. Metal nanoparticles with M-S bond effectively reduced the surface energy and had better compatibility with organic materials. Cross-cutting tests showed that adhesion between the ink and PET films was well and the conductive inks also showed good wet resistance and thermostability.

Comparison Between the Nature and Activity of the Silver Nano Particles on Cervical Cancer Cells That Were Produced by the Active and Inactive Fungal Biomass Forms

2020 ◽  
Author(s):  
Parastoo Pourali ◽  
Mahnaz Nouri ◽  
Tana Heidari ◽  
Niloufar Kheirkhahan ◽  
Behrooz Yahyaei
Keyword(s):  
Fungal Biomass ◽  
Nitrate Solution ◽  
Annexin V ◽  
Silver Nitrate Solution ◽  
Antibacterial Activities ◽  
Nano Particles ◽  
Diffusion Method ◽  
Apoptosis Induction ◽  
Bacterial Strains ◽  
Cervical Cancer Cells

Abstract Background Biologic nanoparticles can be produced by the active and passive mechanisms but their properties have not been compared to each other and recent research tries to uncover them.Methods Biomass of Fusarium oxysporum was divided into four groups and pretreated in: room temperature (RT) and refrigerator (for preparation the active biomass forms); autoclave and hot air oven instruments (for preparation the inactive biomass forms). Samples were floated in ddH2O and SNPs were produced after addition of 1mmol final concentration of silver nitrate solution. Production of SNPs was confirmed using visible spectrophotometer, transmission electron microscopy (TEM) and X-ray diffraction (XRD) analyses. SNPs were washed and their concentration was determined using ICP measurement. Plate well diffusion method was used for antibacterial activity. MTT and Annexin V-FITC/ propidium iodide assays were used for cytotoxicity and apoptosis induction assays, respectively. Result Results showed that all the four tested samples produced SNPs and had maximum absorbance peaks about 400-450 nm. The produced SNPs had almost same shapes and sizes and XRD results confirmed the presence of SNPs in all the samples. ICP results showed that except the refrigerator incubated sample, the concentration of the SNPs in all the flasks was similar to each other. Due to the differences in the nature of the applied bacterial strains the produced SNPs had some differences in their antibacterial activities. MTT assay results showed that due to lower SNPs concentration of the refrigerator incubated sample they had less toxic effects than the others. Apoptosis induction results revealed that the biologically produced SNPs induced more apoptosis and less necrosis.Conclusion In conclusion, the active and inactive fungal biomass forms produced SNPs that their nature and activity were not altered.

Ag Nanoparticles Adsorption on Diatom-Montmorillonite Clays

2013 ◽  
Vol 755 ◽  
pp. 91-96
Author(s):  
A. Ruíz-Baltazar ◽  
R. Esparza ◽  
R. Pérez ◽  
G. Rosas
Keyword(s):  
Silver Nanoparticles ◽  
Porous Material ◽  
Ag Nanoparticles ◽  
Diatomaceous Earth ◽  
Chemical Reduction ◽  
Nitrate Solution ◽  
Silver Nitrate Solution ◽  
X Ray Diffraction ◽  
Montmorillonite Clays ◽  
Complementary Techniques

In this work, a spectroscopic and structural characterization of diatomaceous earth-montmorillonite clays after impregnated with silver nanoparticles were carried out. The silver nanoparticles were synthesized by chemical reduction with sodium borohydride starting from silver nitrate solution. The obtained nanoparticles were stabilized with polyvinyl-pyrrolidone as a surface agent. In order to perform the homogeneous nucleation process, Ag nanoparticles solutions at concentrations of 1, 2 and 4 parts per million were magnetically mixed in the porous material. Additionally, we assessed the porous material adsorption ability of silver by atomic absorption spectroscopy. The quantity of Ag nanoparticles adsorbed by the diatomaceous earth and the adsorption rate as function of the concentration of Ag nanoparticles were established. Other complementary techniques such as X-ray diffraction, infrared spectroscopy and transmission and scanning electron microscopy were used.

Fabrication of Transparent Conductive Film Using Water-Based Nano-Silver Gravure Ink

2013 ◽  
Vol 562-565 ◽  
pp. 1440-1443 ◽  
Author(s):  
Wei Wei Li ◽  
Li Xin Mo ◽  
Ji Lan Fu ◽  
Wen Bo Li ◽  
Jun Ran ◽  
...  
Keyword(s):  
Silver Content ◽  
Chemical Reduction ◽  
Particle Dispersion ◽  
Nano Particles ◽  
Transparent Conductive Film ◽  
Conductive Film ◽  
Water Based ◽  
Edge Sharpness ◽  
Liquid Chemical ◽  
Silver Nano Particle

In this article, three parts of work have been done. First, silver nano-particle dispersion had been obtained by liquid chemical reduction method with Ag+ concentration as 2.7mol/l and UV-vis, SEM were used to characterize the silver nano-particles. Then, the dispersion was purified by solvent deposit method for three times with acetone acting as the deposit agent and water-based gravure ink was obtained after adding water, resin, and other additives. The silver content and viscosity of the ink were measured by TG and rheometer. Finally, the ink was used to fabricate transparent conductive film (TCF) with PET as the substrate. The transmissivity, adhesion, conductivity, and the edge sharpness were measured. The results show that ration of silver nanoplates in the dispersion synthesized can reach to 70%. From TG curve, the silver content of the ink is wt. 49%. Viscosity of the gravure ink is 129mPa•s. The transmissivity of the film is around 80% and the calculated resistivity is 1.53×10-4Ω.cm.

scholarly journals Sintesis dan karakterisai kitosan dari limbah cangkang udang sebagai stabilizer terhadap Ag nanopartikel

2019 ◽  
Vol 4 (2) ◽  
pp. 86
Author(s):  
Astuti Amin ◽  
Nur Khairi ◽  
Eko Allo
Keyword(s):  
Silver Nanoparticles ◽  
Chemical Reduction ◽  
Nitrate Solution ◽  
Average Particle Size ◽  
Silver Nitrate Solution ◽  
Raw Material ◽  
Average Particle ◽  
Synthesize Silver Nanoparticles ◽  
Shrimp Shell ◽  
Shell Powder

The research of manufacturing chitosan from shrimp shell waste , and their use as a stabilizer in the manufacture of silver nanoparticles has been done. The aim of the research was to synthesize silver nanoparticles using chitosan as a stabilizer by chemical reduction method and determine the effect of chitosan concentration on the stability of Ag nanoparticles. In this study, the raw material used is shrimp shell powder and then processed in several stages, eliminating proteins, demineralization, and deacetylation. Chitosan obtained is 16.4 % of shrimp shell powder, with a degree of deacetylation of 85 %. Chitosan is used to synthesize silver nanoparticles as a reducing agent of silver ions in silver nitrate solution and is expected to be stabilizer. Sample containing 45 mg of chitosan and 1000 ppm AgNO3 has 421,60 nm of maximum wavelength, and the average particle size is 154.07 nm.

scholarly journals Application of Eco-Friendly Waterborne Polyurethane Composite Coating Incorporated with Nano Cellulose Crystalline and Silver Nano Particles on Wood Antibacterial Board

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 407 ◽  
Author(s):  
Liangsong Cheng ◽  
Shaobo Ren ◽  
Xiaoning Lu
Keyword(s):  
Electron Microscopy ◽  
Antibacterial Effect ◽  
Nitrate Solution ◽  
Antimicrobial Properties ◽  
Silver Nitrate Solution ◽  
Waterborne Polyurethane ◽  
Nano Particles ◽  
Tem Analysis ◽  
Polyurethane Composite ◽  
Nano Cellulose

To endow wood plate with antimicrobial properties, waterborne polyurethane (WPU) coatings incorporated with nano cellulose crystalline (NCC) and silver nanoparticles (AgNPs) were prepared. AgNPs were obtained by the chemical reactions of silver nitrate solution and sodium borohydride solution. The scribe testing results showed that the adhesion of the NCC-WPU composites was improved with the addition of NCC. The adhesion reached its peak when the amount of NCC added was 1%. Scanning electron microscopy (SEM) observation displayed that the NCC dispersed into the WPU without aggregation. NCC was well able to bind WPU and wood cell walls tightly together. Atomic force microscopy (AFM) and ultraviolet-visible (UV-vis) results revealed that WPU/NCC/AgNPs composites were homogeneous. This compatibility was also confirmed by transmission electron microscopy (TEM) analysis. The antibacterial property was improved too. When the adding amount of NCC was 0.5%, and the proportion of silver elements added was 5%, the antibacterial effect was at its best. As a comparison, the antibacterial effect of hybrid colloid without the addition of NCC was far less than that of including NCC. The WPU/NCC/AgNPs composite could be applied as an antibacterial coating in wood materials.

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