Molecular dynamics simulation study on viscosity of silver nanoparticle printing ink

S Li and L Gao and H Liu, 2020 ASIA CONFERENCE ON GEOLOGICAL RESEARCH AND ENVIRONMENTAL TECHNOLOGY, 632, 052033 (2021).

DOI: 10.1088/1755-1315/632/5/052033

Ink-jet printing and ink direct writing technologies show great advantages in printing electronics and structural customization of flexible materials. The viscosity of the ink will affect the flow rate of the working medium, is an important parameter in the process of deposition. In this paper, the research status of metal particle printing ink and its rheological properties were briefly introduced. Then, water-based silver nanoparticle ink was selected as the research object, and the base liquid system was established with the TIP4P/2005 water model. The shear viscosity of the base liquid was calculated, and the accuracy of the water model in predicting the viscosity was verified. Considering the size of the silver nanoparticles, volume fraction and temperature of the three factors on the viscosity, the effects of the equilibrium molecular dynamics based on Green - Kubo formula viscosity calculation method under different conditions was calculated respectively set shear viscosity of the ink, the conclusion is temperature, volume fraction and particle size on the shear viscosity value, viscosity values associated with negative temperature, volume fraction and the viscosity value is a positive correlation, and particle size has less effect on the viscosity, particle decreases, and the viscosity value increased slightly.

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