Surface grafting of styrene on polypropylene by argon plasma and its adsorption and regeneration of BTX

Abstract

Active macromolecular free radicals were generated on polypropylene (PP) fiber surfaces by argon plasma irradiation, and surface-modified PP fibers (PP-g-St fibers) were prepared by in situ grafting reaction of styrene monomers (St). The prepared samples were characterized by Fourier transform infrared, NMR, X-ray photoelectron spectroscopy, scanning electron microscopy, and thermogravimetric analysis. Effects of reaction parameters on grafting percentage were studied, and adsorption capacities of PP-g-St fibers for benzene, toluene, and xylene (BTX) were evaluated. Regeneration adsorption efficiencies after adsorption of pure BTX and BTX emulsion and solution in water were explored. The results indicated that, using pure St as the monomer, the optimum input power, irradiation time, and grafting reaction time are 90 W, 3 min, and 3 h, respectively, and the grafting percentage of St reached 5.7% when pure St was used. The characterization results demonstrated that St was grafted onto the surface of the PP fibers. Compared to pristine PP fibers, the adsorption capacities of PP-g-St fibers toward toluene and xylene emulsions and solutions in water increased. In addition, regeneration adsorption efficiencies of modified fibers remained >90% after six cycles of regeneration adsorption experiments, which showed excellent regeneration ability.

Preparation and rheological study of pentaerythritol triacrylate grafted onto polypropylene induced by air plasma

“…Compared with the traditional solution grafting and vapor phase grafting, melt grafting has two advantages. One is that the melt grafting requires much less time, around tens of minutes, than hours in solution or vapor phase grafting . The other is that melting grafting achieves the modification of polymer bulk, more efficient than the only surface modification in solution grafting and vapor phase grafting .…”

Ion-Imprinted Polypropylene Fibers Fabricated by the Plasma-Mediated Grafting Strategy for Efficient and Selective Adsorption of Cr(VI)

“…Particles with higher energy tend to bombard the material surface more violently and lead to higher mass loss. In general, the weight loss within 19 min was less than 2.0%, which could be ignored in the calculation of the grafting degree [17].…”

“…The reactions involved in the preparation of ion-imprinted fibers are shown in Scheme 1. First, AA was grafted onto the surface of a PP fiber [14,17]. As shown in Figure 1, three gases, namely AA, air, and argon, were used for the radio frequency discharge plasma irradiation to generate free radicals on PP fibers, respectively.…”

“…Then, the chelating fibers were modified with diethanolamine for Ag + adsorption. Generally, gaseous plasma treatment and grafting of a monomer from the liquid phase are applied into two steps [16,17,18] or the plasma discharge treatment and grafting process occur simultaneously in monomer solution [19,20]. If the monomer gas is directly used for plasma pretreatment and grafting, the preparation steps can be simplified and the grafting efficiency can be improved [21].…”

Improvement of Polypropylene Properties by Irradiation / Grafting and other Modifications.

“…Plasma discharge exposure to fabric and then grafting results in excellent hydrophilic, wettability and dyeing properties. Argon plasma irradiation in presence of styrene was used for PP modification in a specially designed device [4]. The grafted samples were characterized and analyzed.…”