scholarly journals Molecular dynamics computations of brine–CO2 interfacial tensions and brine–CO2–quartz contact angles and their effects on structural and residual trapping mechanisms in carbon geo-sequestration

2012 ◽  
Vol 386 (1) ◽  
pp. 405-414 ◽  
Author(s):  
S. Iglauer ◽  
M.S. Mathew ◽  
F. Bresme
Author(s):  
Ivan de Jesus AGUILAR-MARURI ◽  
David CONTRERAS-LÓPEZ ◽  
Rosario GALINDO-GONZÁLEZ ◽  
Rosalba FUENTES-RAMÍREZ

This work includes the search for the development of a composite of a WPU (waterborne polyurethane), β-CD (β-Cyclodextrin), PZnO (zinc oxide particles), and the presence of CaCO3, to obtain new properties such as adhesion to multiple substrates of organic and inorganic origin. Therefore, a development sequence was proposed: Computational development: conformation of the polymeric matrix (with the intermediary polymers) and simulation of the interaction between β-CD and PZnO and Ca+2 and CO3-2 ions, as well as insertions in β-CD, computational simulations were carried out with the help of ACD LABS™ (free version) software and by molecular dynamics with GROMACS™. With the above, we were able to determine properties such as interfacial tensions, surface tensions, and contact angles, and degrees of solvation and stability in waterborne emulsions. Therefore, it is important to point out that one of the main contributions of this research proposal is that there are no studies that combine these materials.


2021 ◽  
Vol 1 (1) ◽  
pp. 10
Author(s):  
Lukman Hakim ◽  
Irsandi Dwi Oka Kurniawan ◽  
Ellya Indahyanti ◽  
Irwansyah Putra Pradana

The underlying principle of surface wettability has obtained great attentions for the development of novel functional surfaces. Molecular dynamics simulations has been widely utilized to obtain molecular-level details of surface wettability that is commonly quantified in term of contact angle of a liquid droplet on the surface. In this work, the sensitivity of contact angle calculation at various degrees of surface hydrophilicity to the adopted potential models of water: SPC/E, TIP4P, and TIP5P, is investigated. The simulation cell consists of a water droplet on a structureless surface whose hydrophilicity is modified by introducing a scaling factor to the water-surface interaction parameter. The simulation shows that the differences in contact angle described by the potential models are systematic and become more visible with the increase of the surface hydrophilicity. An alternative method to compute a contact angle based on the height of center-of-mass of the droplet is also evaluated, and the resulting contact angles are generally larger than those determined from the liquid-gas interfacial line.


Fuel ◽  
2020 ◽  
Vol 280 ◽  
pp. 118590 ◽  
Author(s):  
Xinran Yu ◽  
Jing Li ◽  
Zhangxin Chen ◽  
Keliu Wu ◽  
Linyang Zhang ◽  
...  

Soft Matter ◽  
2019 ◽  
Vol 15 (19) ◽  
pp. 3923-3928 ◽  
Author(s):  
T. Omori ◽  
Y. Kobayashi ◽  
Y. Yamaguchi ◽  
T. Kajishima

Our molecular dynamics simulation has revealed the asymmetric behaviour between the advancing and receding contact angles even on smooth surfaces.


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