Abstract
The adsorption of a polymer chain on an attractive nano-sized spherical particle is studied by using Monte Carlo simulation. The polymer-particle interaction is treated as Lennard-Jones potential with strength ε PP. The critical adsorption point ε * PP is estimated from the largest fluctuation of the number of monomers contacted with particle. We find that ε * PP is dependent on the comparison between particle size σ p and R G0, the mean radius of gyration of polymer in dilute solution. ε * PP decreases with an increase in σ p at σ p < R G0 and is independent of σ p at σ p ≥ R G0. The polymer starts to be adsorbed on particle, and the mean contact time begins to increase at ε * PP. In addition, the structural property characterized by trains, loops, and tails is investigated for polymer contacted with particle. Results show that the structure is dependent on the interaction strength ε pp. We find that both the number of monomers contacted with the particle and the length of trains increase with ε pp, whereas lengths of tail and loop decrease with the increase in ε pp.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China under Grant Nos. 11374255 and 11474222 and the Natural Science Foundation of Zhejiang Province of China under Grant Nos. LY15A040009 and LQ14A040001. Computer simulations were carried out in the High Performance Computing Center of Hangzhou Normal University, College of Science.
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Li, CY., Cao, WP., Luo, MB. et al. Adsorption of polymer on an attractive nano-sized particle. Colloid Polym Sci 294, 1001–1009 (2016). https://doi.org/10.1007/s00396-016-3858-y
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DOI: https://doi.org/10.1007/s00396-016-3858-y