Functionalization of polyacrylonitrile nanofiber mat via surface-initiated atom transfer radical polymerization for copper ions removal from aqueous solution

Abstract

A B S T R A C TPoly (acrylic acid) (PAAc)-functionalized PAN nanofiber (PAN-COOH) mats were prepared via electrospinning followed by atom transfer radical polymerization for the removal of copper ions from aqueous solution. Attenuated total reflections Fourier transform infrared and X-ray photoelectron spectroscopy results confirmed the presence of PAAc layer on the surface of PAN nanofibers. The morphology of PAN-COOH nanofibers was studied by scanning electron microscopy. Adsorption results indicated that the adsorption capacity was pH dependent. Adsorption equilibrium reached within 30 min as the initial solution concentration increased from 108 to 268 mg/L, and the process can be described using the pseudosecond-order model. Isotherm data fitted well to the Langmuir isotherm model. Desorption results showed that adsorption capacity can remain up to 90% after five times usage.

Synthesis of PAN with adjustable molecular weight and low polydispersity index (PDI) value via reverse atom transfer radical polymerization

“…In the past years, a tremendous amount of attempts have been made to develop new initiators and new catalytic systems of RATRP [25][26][27][28][29], there are also many studies have been aimed at finding new solvents and ligands which made an influence of the reactivity [30][31][32]. Qin [33] reported a RATRP of styrene which was investigated with initiating system, DCDPS/FeCl 3 /PPh 3 , in which diethyl 2, 3-dicyano-2, 3-diphenylsuccinate (DCDPS) was a hexa-substituted ethane thermal iniferter.…”

Preparation of α-Fe2O3/polyacrylonitrile nanofiber mat as an effective lead adsorbent

“…The adsorption approach can be highly efficient and cost-effective, especially when the ion concentration is low [9] . Many kinds of Pb-adsorbing materials including carbon materials [10] , clays [11] , activated phosphate [12] , metal oxide [13] , and modified polymer materials [14,15] have been recently developed and used for water purification and treatment. Among these adsorbents, metal oxides exhibit strong affinity to metal ions and can be easily prepared at low cost, suggesting an excellent Pb-adsorbent candidate [16] .…”

Electrospun poly(acrylic acid)/poly(vinyl alcohol) nanofibrous adsorbents for Cu(ii) removal from industrial plating wastewater

“…22,54 Similar ndings were reported for electrospun nanobers synthesized from PAA/PVA polymers, 35 silk broin/ nylon-6 polymers, 17 and PAA/PAN polymers. 23 Wang et al 23 examined the effect of pH on Cu(II) removal by PAA/PAN nanobers, reporting that adsorption of Cu(II) was pH dependent, with a maximum adsorption capacity at pH 5. The effect of adsorbent dose on Cu(II) removal is presented in Table 2.…”

“…[12][13][14][15][16][17][18] Among electrospun nanobers from solvent-soluble polymers, PAN nanobers have been most commonly used in the adsorption of Cu(II) because the amino groups on the surface of PAN form strong complexes with Cu(II). [19][20][21][22][23] Even with its good performance for Cu(II) removal, however, PAN dissolves in toxic organic solvent due to its high crystallinity, causing environmental problems during nanober synthesis. Other researchers have fabricated electrospun nanobers using environmentally friendly and water-soluble polymers such as chitosan, poly(vinyl alcohol) (PVA), and poly(acrylic acid) (PAA).…”