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Study on oil adsorption/desorption kinetics and polymer network parameters of poly(lauryl methacrylate-co-hydroxyethyl methacrylate)

journal contribution
posted on 2017-10-01, 00:00 authored by J Zhao, S Tian, Linpeng Fan, Y Shan, C Xiao
In the present work, oil adsorption, desorption, and resorption of poly(lauryl methacrylate-co-hydroxyethyl methacrylate) P(LMA-co-HEMA) were evaluated with different oils by a gravimetric method. Adsorption kinetics were modeled using pseudo-first-order and pseudo-second-order equations. Polymer network parameters of P(LMA-co-HEMA) regarding average molecular weight (Mc) between two crosslink piontss can be calculated by oil absorbency at equilibrium (Qe), the solubility parameter (δ) and polymer-solvent interaction parameter (χ) with Flory-Huggins relation. The results showed pseudo-second-order model has a better fit to the oil adsorption kinetic data The desorption can be analyzed by fitting a prediction of exponential-like decay to the deswelling curves. A typical oil desorption exhibited two stages: a burst release driven by concentration gradient, and a slow release controlled by diffusion and the elastic recovery of polymer networks. For reusability, the resorption behavior of P(LMA-co-HEMA) was also investigated. It was worth noting that oil resorption was faster than the first adsorption due to potential passages. Moreover, the adsorption capacity was not significantly changed after regeneration.

History

Journal

Fibers and polymers

Volume

18

Issue

10

Pagination

1858 - 1864

Publisher

Springer

Location

Dordrecht, The Netherlands

ISSN

1229-9197

Language

eng

Publication classification

C1 Refereed article in a scholarly journal