Preparation of silver nanoparticles and application in water-based conductive inks

2019 ◽  
Vol 33 (32) ◽  
pp. 1950385
Author(s):  
Y. Z. Zhao ◽  
D. X. Du ◽  
Y. H. Wang
Keyword(s):  
Silver Nanoparticles ◽  
Sodium Borohydride ◽  
Large Scale ◽  
Raw Material ◽  
High Yield ◽  
Conductive Inks ◽  
Large Scale Preparation ◽  
Heat Treated ◽  
Scale Preparation ◽  
Conductive Fillers

We reported a simple, high yield and large-scale preparation method for silver nanoparticles. Silver nanoparticles with 8–13 nm in diameter were successfully synthesized by silver nitrate as raw material, sodium borohydride as reducing agent, dispersan-5040 (polycarboxylate sodium salt) as surface modifier in aqueous solution. The effects of sodium borohydride and dispersan-5040 on the morphologies of silver nanoparticles were investigated. Further, the conductive inks were prepared with as-synthesized silver nanoparticles as conductive fillers in the presence of deionized (DI) water and additives. The effects of conductive fillers and additives on the pH, conductivity, surface tension and viscosity of the inks were investigated. The conductive patterns were fabricated by inkjet printer and their performances were studied. The sheet resistances of the printed pattern with seven-layer was 1.2 [Formula: see text] when the printed pattern was heat-treated at 120[Formula: see text]C for 60 min. We succeeded in printing a simple conductive circuit on photographic paper, which can light three 0.06 W LED beads. The successful fabrication of the functional circuit proves the feasibility of the ink and provides some ideas for future paper-based circuits.

Study on Nano-Hydroxyapatite Assisted Preparing by Ionic Liquids

2014 ◽  
Vol 1015 ◽  
pp. 501-504 ◽  
Author(s):  
Yong Guang Bi ◽  
Xu Si Xu
Keyword(s):  
Grain Size ◽  
Ionic Liquids ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Large Scale ◽  
Preparation Method ◽  
Raw Material ◽  
Large Scale Preparation ◽  
Scale Preparation

Papers with Ca (NO3)2• 4H2O and (NH4)2HPO4as raw material, prepared by ionic liquids assisted nanoHAP, resulting hexagonal nanoHAP are crystal grain size are 10-20nm level, are smaller nanometer range ; specific surface area, the findings show that ionic liquids have the technology to promote the significance of the preparation method can provide a reference for large-scale preparation of biomedical nanomaterials.

Continuously Large-Scale Preparation of Multi-Layer Graphene Grown on Polycrystalline SiC Microspheres

2014 ◽  
Vol 597 ◽  
pp. 99-102
Author(s):  
Jun Ma ◽  
Gong Yi Li ◽  
Zeng Yong Chu ◽  
Tian Jiao Hu ◽  
Yi He Li ◽  
...  
Keyword(s):  
Large Scale ◽  
Preparation Method ◽  
Chemical Vapor ◽  
Deposition Process ◽  
Hybrid Nanostructures ◽  
Raw Material ◽  
Temperature Dependent ◽  
Layer Graphene ◽  
Large Scale Preparation ◽  
Scale Preparation

Gram scale multi-layer graphene grown on polycrystalline SiC microspheres were prepared by continuously preparation method in argon through chemical vapor deposition process using liquid polysilacarbosilane as raw material. The observation of products obtained at different temperature confirmed the growth is temperature dependent process. The method could be developed to synthesis hybrid nanostructures based on multi-layer graphene grown on polycrystalline SiC microspheres.

A RAPID METHOD FOR THE LARGE SCALE PREPARATION OF CALF THYMUS DEOXYRIBONUCLEATE

1958 ◽  
Vol 36 (1) ◽  
pp. 1115-1119
Author(s):  
R. O. Hurst
Keyword(s):  
Salt Solution ◽  
Large Scale ◽  
Potassium Thiocyanate ◽  
Aqueous Salt Solution ◽  
High Yield ◽  
Large Scale Preparation ◽  
Calf Thymus ◽  
Thymus Tissue ◽  
Scale Preparation ◽  
Concentrated Solution

Isolation of deoxyribonucleate from a concentrated solution of thymonucleoprotein has been achieved by disruption of the protein nucleate bond with potassium thiocyanate, adsorption of the protein on celite, and alcohol precipitation of the deoxyribonucleate from aqueous salt solution. Highly polymerized nucleate can be obtained readily from 1 lb of calf thymus tissue in high yield.

A RAPID METHOD FOR THE LARGE SCALE PREPARATION OF CALF THYMUS DEOXYRIBONUCLEATE

1958 ◽  
Vol 36 (11) ◽  
pp. 1115-1119 ◽  
Author(s):  
R. O. Hurst
Keyword(s):  
Salt Solution ◽  
Large Scale ◽  
Potassium Thiocyanate ◽  
Aqueous Salt Solution ◽  
High Yield ◽  
Large Scale Preparation ◽  
Calf Thymus ◽  
Thymus Tissue ◽  
Scale Preparation ◽  
Concentrated Solution

Isolation of deoxyribonucleate from a concentrated solution of thymonucleoprotein has been achieved by disruption of the protein nucleate bond with potassium thiocyanate, adsorption of the protein on celite, and alcohol precipitation of the deoxyribonucleate from aqueous salt solution. Highly polymerized nucleate can be obtained readily from 1 lb of calf thymus tissue in high yield.

scholarly journals An Efficient Synthesis of Ginsenoside Rg5 via Conversion of PPD Type Saponins: Unusual Application of 4A Molecular Sieves

2021 ◽  
Vol 16 (4) ◽  
pp. 1934578X2110076
Author(s):  
Cheng Le-qin ◽  
Ye An-qi ◽  
Zhang Hao-ran ◽  
Zhang Yue-wei ◽  
Li Ling
Keyword(s):  
Hydrochloric Acid ◽  
Molecular Sieves ◽  
Molecular Sieve ◽  
Large Scale ◽  
High Yield ◽  
Experimental Conditions ◽  
Large Scale Preparation ◽  
Reaction Solution ◽  
Ginsenoside Rg5 ◽  
Scale Preparation

Ginsenoside Rg5 is a rare secondary ginsenoside with good pharmacological activity. However, preparation of Rg5 is time consuming, gives a low yield and has poor selectivity and efficiency. Therefore, the current study describes an efficient method of preparing ginsenoside Rg5 through conversion of Protopanaxadiol (PPD) type saponins in the presence of a molecular sieve and hydrochloric acid. The PPD type saponins were transformed on the surface of a molecular sieve to obtain ginsenoside Rg5 and most of the generated secondary ginsenoside was dissociates into the reaction solution, avoiding further decomposition. In addition, the optimal experimental conditions were identified to be as follows; 0.5 ml of absolute ethanol, 0.2 mol/L of hydrochloric acid, 12.5 mg of a 4A molecular sieve, a reaction time of 2.5 hours and a reaction temperature of 70 ℃. Under these experimental conditions, yields of upto 63.2% were obtained for ginsenoside Rg5. Moreover, the hydrochloric acid-catalyzed preparation of ginsenoside Rg5 effectively inhibited its decomposition in the presence of a molecular sieve. The method is therefore suitable for laboratory and industrial production with the advantages of large-scale preparation and high-yield.

Purification of the Antihemophilic Factor by Gel Filtration on Agarose

1969 ◽  
Vol 22 (03) ◽  
pp. 577-583 ◽  
Author(s):  
M.M.P Paulssen ◽  
A.C.M.G.B Wouterlood ◽  
H.L.M.A Scheffers
Keyword(s):  
Factor Viii ◽  
Plasma Proteins ◽  
Large Scale ◽  
Gel Filtration ◽  
Large Scale Preparation ◽  
Scale Preparation ◽  
Antihemophilic Factor

SummaryFactor VIII can be isolated from plasma proteins, including fibrinogen by chromatography on agarose. The best results were obtained with Sepharose 6B. Large scale preparation is also possible when cryoprecipitate is separated by chromatography. In most fractions containing factor VIII a turbidity is observed which may be due to the presence of chylomicrons.The purified factor VIII was active in vivo as well as in vitro.

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