Preparation and characterization of PVC/PS composite cation exchange fibers and their adsorption properties on aniline

Abstract

Based on the composite fibers made from polyvinylchloride (PVC) and polystyrene (PS), the composite fibers obtained were further crosslinked and sulphonated with 50% oleum to produce the acidic cation ion exchange fibers. The optimal technology of the fibers obtained were discussed, the structures of the fibers thus obtained were investigated by using Fourier transform infrared (FTIR) spectrophotometry, thermogravimetry analysis (TG), differential thermogravimetry analysis (DTG), and scaning electron microscope (SEM) etc. Their properties were measured using chemical titration, filament mightiness instrument, etc. The absorption kinetics and the main factors affecting absorption capacity on aniline were studied, and their regenerating properties were probed. The results indicated that the cation exchange fibers with better mechanical property and higher exchange capability were obtained. The fibers had bigger hydrophilicity, better ability of acid, and alkali corrosion resistance, so they had better practical application value. This type of ion exchange fibers had faster absorption property and better working stability to aniline and could be used repeatedly, so they were applied for treatment of waste water containing aniline with a promising prospect.

Evaluation of strongly acidic ion‐exchange catalysts and the desulfonation study in the isobutylene dimerization reaction

“…The antisymmetric and symmetric vibration adsorption peaks of the SO group could be assigned to the peaks at around 1181 cm −1 and 1037 cm −1 , respectively, which was used to measure the sulfonation degree 23–27. The peaks at 837 cm −1 and 777 cm −1 correspond to the CH out‐of‐plane vibration for para‐substitution and ortho‐substitution of the benzene ring 27–29. The peak at 1600 cm −1 , which corresponds to the CC in‐plane stretching of the styrene ring, is insensitive to the chemical structure changes associated with the sulfonation along the chain 30.…”