Abstract:
Hypercrosslinked polymer (HCP) is a class of microporous organic polymer connected by light elements (C, H, O, and N) through covalent bonds. In order to efficiently adsorb soluble organic dyes in water treatment, here, an ionic HCP (HCP-SO
3Na) was prepared through an efficient Friedel-Crafts reaction from sodium 4-(phenylamino)benzenesulfonate and benzene in the presence of formaldehyde dimethyl acetal and anhydrous FeCl
3. A series of characterizing techniques such as elemental analysis, infrared spectroscopy, N
2 adsorption/desorption analysis, solid-state
13C nuclear magnetic resonance spectroscopy and thermogravimetric analysis were employed to characterize the structure and thermal property of the ionic polymer. It was found that HCP-SO
3Na was an amorphous microporous polymer with large specific surface area and high thermostability. The specific surface area and micropore area were 587 m
2/g and 411 m
2/g, respectively. The adsorption of HCP-SO
3Na for the organic dye of Rhodamine B demonstrated the ―SO
3Na groups distributing uniformly in the polymer could increase the saturation capacity of HCP. The maximum adsorption capacity was up to 431 mg/g. The adsorption process conformed to kinetic pseudo-second-order model and Langmuir model. HCP-SO
3Na can be easily recovered and reused five times without significant loss of activity.