Preparation of PP-g-(AA-MAH) Fibers Using Suspension Grafting and Melt-Blown Spinning and its Adsorption for Aniline

Abstract

This paper uses polypropylene (PP) as the matrix and acrylic acid (AA) and maleic anhydride (MAH) as functional monomers to prepare PP-g-(AA-MAH) fibers by suspension grafting and melt-blown spinning technology that are easy to industrially scale-up. The fibers can be used to adsorb aniline. Results showed that the grafting ratio reached the maximum of 12.47%. The corresponding optimal conditions were grafting time of 3 h, AA: MAH = 0.75, total monomer content of 55%, benzoyl peroxide 1.4%, xylene concentration of 6 mL/g PP, and deionized water content of 8 mL/g PP. Owing to its good fluidity and thermal stability, the product of suspension grafting can be used for melt-blown spinning. Infrared spectroscopic and nuclear magnetic resonance spectroscopic analyses indicated that AA and MAH were successfully grafted onto PP fibers. After grafting, the hydrophilicity of PP-g-(AA-MAH) fiber increased. Therefore, it had higher absorptivity for aniline and the adsorption capacity could reach 42.2 mg/g at 45 min and pH = 7. Moreover, the PP-g-(AA-MAH) fibers showed good regeneration performance.

The Impact of PP-g-MAH on Mechanical Properties of Injection Molding of Long Glass Fiber/Polypropylene Pellets from Thermoplastic Pultrusion Process

“…The spectra of virgin PP and the LFTPc with a varying PP-g-MAH content were examined at wave numbers ranging between 4000 and 400 cm −1 ; these spectra are displayed in Figure 11. The FTIR spectra exhibit consistent peaks at 2949 and 2915 cm −1 , corresponding to aliphatic C-H stretching, and at 1457 and 1375 cm −1 , indicating C-H bending, which, respectively, demonstrate the presence of PP in the LFTPc [34,[42][43][44]. The carbonyl group (C=O) of the anhydride and the acid groups, respectively, is represented by peaks at 1740 and 1714 cm −1 in the FTIR spectra of the LFTPc with varying concentrations of PP-g-MAH [44][45][46].…”

Preparation and Performance Study of Boron Adsorbent from Plasma-Grafted Polypropylene Melt-Blown Fibers

“…Commonly, metal skeletons [ 23 ], silicone resin [ 24 ], natural products [ 25 ], and other manufactured materials are used as adsorbents. Polypropylene (PP) melt-blown fibers are low-cost textile fibers with a small single-fiber diameter, high porosity, large surface area, outstanding chemical and microbial resistance, and ease of processing, making them widely used as matrix materials [ 26 , 27 , 28 ]. However, PP is a hydrophobic polymer, and its molecular chain lacks polar functional groups, which limits the application of boron removal and recovery in aqueous environments [ 29 , 30 ].…”

Microwave-Induced Grafting of Maleic Anhydride onto the Surface of a Polypropylene Film for High Adhesion to Polyamide 6

“…Commonly used surface grafting methods include solid-phase grafting, suspension grafting, and irradiation grafting . Because of the low reaction temperature in solid-phase and suspension grafting processes, the reaction time is very long, which is not conductive from an industrial view .…”

“…Second, residual monomers shall be easily removed, as the grafting reaction is restrained only on the surface of the film, unlike conventional processes in which residues are uniformly distributed in the bulk. In addition, the degradation of PP in the bulk can be inhibited since the Commonly used surface grafting methods include solidphase grafting, 21 suspension grafting, 22 and irradiation grafting. 23 Because of the low reaction temperature in solidphase and suspension grafting processes, the reaction time is very long, which is not conductive from an industrial view.…”