title: Mesoscopic Simulations of Adsorption and Association of PEO-PPO-PEO Triblock Copolymers on a Hydrophobic Surface: From Mushroom Hemisphere to Rectangle Brush.
abstract: The dissipative particle dynamics (DPD) method is used to investigate the adsorption behavior of PEO-PPO-PEO triblock copolymers at the liquid/solid interface. The effect of molecular architecture on the self-assembled monolayer adsorption of PEO-PPO-PEO triblock copolymers on hydrophobic surfaces is elucidated by the adsorption process, film properties, and adsorption morphologies. The adsorption thicknesses on hydrophobic surfaces and the diffusion coefficient as well as the aggregation number of Pluronic copolymers in aqueous solution observed in our simulations agree well with previous experimental and numerical observations. The radial distribution function revealed that the ability of self-assembly on hydrophobic surfaces is P123 > P84 > L64 > P105 > F127, which increased with the EO ratio of the Pluronic copolymers. Moreover, the shape parameter and the degree of anisotropy increase with increasing molecular weight and mole ratio of PO of the Pluronic copolymers. Depending on the conformation of different Pluronic copolymers, the morphology transition of three regimes on hydrophobic surfaces is present: mushroom or hemisphere, progressively semiellipsoid, and rectangle brush regimes induced by decreasing molecular weight and mole ratio of EO of Pluronic copolymers.
authors.affiliation: Department of Mechanical and Electrical Engineering, Dazhou Vocational and Technical College , Dazhou, Sichuan 635000, P. R. China.
authors.forename: Xianyu
authors.initials: X
authors.lastname: Song
authors.affiliation: State Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, P. R. China.
authors.forename: Shuangliang
authors.initials: S
authors.lastname: Zhao
authors.affiliation: College of Chemistry and Chemical Engineering, Southwest Petroleum University , Chengdu 610500, P. R. China.|Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Chengdu 610500, P. R. China.
authors.forename: Shenwen
authors.initials: S
authors.lastname: Fang
authors.affiliation: Sichuan Province Academy of Industrial Environmental Monitoring, Chengdu 610500, P. R. China.
authors.forename: Yongzhang
authors.initials: Y
authors.lastname: Ma
authors.affiliation: College of Chemistry and Chemical Engineering, Southwest Petroleum University , Chengdu 610500, P. R. China.|Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Chengdu 610500, P. R. China.
authors.forename: Ming
authors.initials: M
authors.lastname: Duan