Photoinduced grafting of vinyl benzyl trimethyl ammonium chloride on polyester nonwoven fabric with surfactant coating and its anion‐exchange properties

Abstract

Vinyl benzyl trimethyl ammonium chloride (VBTAC) could be efficiently and stably grafted onto polyester fiber coated with a surfactant polyester (PET) by a photoirradiation-induced graft polymerization with benzophenone as the photoinitiator without any cografting monomer required. The degree of VBTAC grafting could be controlled simply by the irradiation time and concentration of VBTAC in the monomer solution. The anion-exchange capacity (AEC) of the PET-g-VBTAC fabrics increased with increasing degree of grafting up to 80 6 5% and then leveled off. The maximum AEC of PET-g-VBTAC was 2.2 mequiv/g; this was similar to that of a commercial anion-exchange resin (2.16 6 0.04 mequiv/g) and much higher than those of nylon-g-VBTAC-2-hydroxyethyl methacrylate fabrics ( 1.0 mequiv/g) prepared with a conventional cografting system. The grafted fabric was characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, and scanning electron microscopy studies, and the sorption selectivity for anions and regeneration efficiency were estimated. The results suggest that the grafting system, in which VBTAC alone was grafted onto PET fiber coated with surfactant, was more practical and effective for the preparation of the VBTACcontaining anion exchanger, and the resulting PET-g-VBTAC fabrics could be used as an effective anion exchanger. V C 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41674.

Surface-Modified Pore-Filled Anion-Exchange Membranes for Efficient Energy Harvesting via Reverse Electrodialysis

“…The FT-IR spectra of the porous support and prepared PFAEM are shown in Figure 6a. The spectrum of the PFAEM is significantly different from that of the PE support, and an O-H stretching vibration was confirmed at 3385 cm −1 , which indicates the introduction of hydrophilic ion exchange groups into the polymer [41]. Meanwhile, an aromatic C-H bond was observed from the absorption band at 3026 cm −1 [42], and a C=C bond and aromatic ring by VBTAC and STY were confirmed from the absorption bands observed at 1640 and 1380 cm −1 , respectively [43,44].…”

Bipolar Membranes Containing Iron-Based Catalysts for Efficient Water-Splitting Electrodialysis

“…As revealed in Figure 4a, the FT-IR spectra of AEM is shown to be significantly different from that of PE support. From the spectrum of AEM, the O-H stretching vibration was confirmed at 3390 cm −1 , which is due to the hydrophilization of polymer by the introduction of ion-exchange groups [29]. In addition, the C-H aromatic bond was identified from the absorption band at 3020 cm −1 [30], and the C=C bond and the aromatic ring were identified from the absorption bands at 1640 and 1390 cm −1 , respectively [31,32].…”

Hydrophilic Finishing of Polyester Fiber with Finishing Agents Based on Poly(γ-glutamic acid)

“…Various methods are being employed in order to improve the hydrophilicity of PET fibrous material, including plasma treatment [4,5], enzymatic treatment [6], physical coating [5,7,8], macromolecular grafting [9,10,11], surface modification [12], chemical processing [13],glow discharge [14,15], salinization [16]. But these methods mainly depend on high energy input or harsh chemicals that complicated to handle.…”