Preparation of bimodal porous copolymer containing β‐cyclodextrin and its inclusion adsorption behavior

Abstract

A novel insoluble bimodal porous polymer containing b-cyclodextrin (b-CD) was prepared to adsorb aromatic amine compound. The process involved copolymerization of styrene and methyl methacrylate with a maleic acid derivative of b-CD, subsequently, above formed copolymer was foamed by supercritical CO 2 . The chemical properties and physical structure of obtained copolymer was analyzed using Fourier transform infrared spectra, Thermal gravimetric analysis, X-ray diffraction, scanning electron microscope, and N 2 adsorption techniques. The inclusion adsorption of aromatic amine compounds on b-CD copolymer was carried out in a batch system. The quantities of aromatic amine compounds adsorbed on b-CD copolymer reached equilibrium within 60 min. The adsorption kinetic could be fitted to a pseudo-secondorder kinetic equation, and the linear correlation coefficients varied from 0.9828 to 0.9935. With the influence of molecular structure and hydrophobicity of the aromatic amine compound, the sequence of quantity of aromatic amine compounds adsorbed on b-CD copolymer is p-toluidine > aniline > benzidine > o-toluidine. The adsorption equilibrium data of aromatic amine compound adsorbed on b-CD copolymer were fitted to Freundlich and Langmuir models, respectively. The linear correlation coefficients of Langmuir model varied from 0.9516 to 0.9940, and the linear correlation coefficients of Freundlich varied from 0.9752 to 0.9976. It is concluded that Freundlich model fits better than Langmuir model, because the adsorption of aromatic amine compound on b-CD copolymer is a chemical process.

Adsorption kinetics and thermodynamics of water-insoluble crosslinked β-cyclodextrin polymer for phenol in aqueous solution

“…As has been reported, water-insoluble β-CD polymers, which are new type of adsorbent, could effectively adsorb organic molecules and heavy metals in aqueous solution. [5][6][7][8] Phenols (phenol and phenolic compounds) are commonly encountered in aqueous effluents from various manufacturing processes, such as oil refineries, coke plants, and phenolic resin plants. 9 It can contain as little as 10 mg/L to greater than 5,000 mg/L of phenol.…”

β-Cyclodextrin based Molecular Imprinted Solid Phase Extraction for Class Selective Extraction of Priority Phenols in Water Samples

“…With its hydrophobic cavity, β-CD has great capacity to selectively form inclusion complexes with certain molecules through hostguest interactions (33)(34)(35). Thus, it offers a choice for separating various compounds and provides a useful and versatile tool for protecting the environment (36).…”

β-Cyclodextrin functionalized polystyrene porous monoliths for separating phenol from wastewater

“…This material exhibited a strong affinity towards phenol. Sun et al (2010) prepared a novel ␤-CD containing an insoluble bimodal porous polymeric material that adsorbed aromatic amine compounds. However, in these reports, the lack of sufficient functional groups for phenol removal and diffusion limitations within the http://dx.doi.org/10.1016/j.carbpol.2014.12.011 0144-8617/© 2014 Elsevier Ltd. All rights reserved.…”