The acquisition and calibration of coarse-grained force field parameters for graphene/nitrile rubber nanocomposites

被引:3
作者
Yang, Bin [1 ,2 ]
Li, Yunlong [1 ]
Wang, Shijie [1 ]
Nie, Rui [3 ]
Chen, Lijia [2 ]
机构
[1] Shenyang Univ Technol, Sch Mech Engn, Shenyang 110870, Peoples R China
[2] Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Peoples R China
[3] Beihang Univ, Ningbo Inst Technol, Ningbo 315800, Peoples R China
来源
MATERIALS TODAY COMMUNICATIONS | 2024年 / 40卷
基金
中国国家自然科学基金;
关键词
Nitrile rubber nanocomposites; Graphene; Coarse-grained parameters; Molecular dynamics simulation; CARBON-BLACK; COMPOSITES; MODEL; ENHANCEMENT;
D O I
10.1016/j.mtcomm.2024.109891
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Graphene (GNS) is an ideal reinforcing material for developing high-performance nitrile rubber (NBR) nanocomposites to withstand complex and harsh working conditions. The mesoscale molecular simulation is significant in exploring the microscopic mechanism of nanocomposites. Initially, a coarse-grained (CG) scheme for NBR was established, and the potential parameter files were obtained through the iterative Boltzmann inversion method. Then, the bond and angle parameters were fitted by harmonic potential, the non-bonded interactions were fitted by LJ 12-6 potential. The CG force field parameters were coefficients of the potential function. The parameters such as the stiffness values, potential well parameter, etc., were calibrated by stretching the NBR molecular chains, and comparing the density and stretching performances of the NBR all-atomic and CG models. A rapid method for obtaining the non-bonded parameters between NBR and GNS was proposed based on the radial distribution function curves. The non-bonded parameters were calibrated by comparing GNS pull-out simulations, and the density and tensile properties of the GNS/NBR models. Finally, the CG force field parameters applicable to the GNS/NBR nanocomposites were obtained. The study is expected to be significant for subsequent mesoscale studies on GNS/NBR nanocomposites.
引用
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页数:10
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