Highly conductive cellulosic nanofibers for efficient water desalination

被引:8
作者
Gouda, Mohamed [1 ,2 ]
Abu-Abdeen, Mohamed [3 ,4 ]
机构
[1] King Faisal Univ, Dept Chem, Coll Sci, Al Hasa 31982, Saudi Arabia
[2] Natl Res Ctr, Text Res Div, Cairo 12622, Egypt
[3] King Faisal Univ, Dept Phys, Coll Sci, Al Hasa 31982, Saudi Arabia
[4] Cairo Univ, Dept Phys, Geza 12613, Egypt
关键词
Electrospinning; Cellulose nanofibers; Conductive textiles; Carbon nanotubes; Water desalination; CARBON NANOTUBES; MEMBRANE DISTILLATION; NANOCOMPOSITES; PURIFICATION; ADSORPTION; JUICE;
D O I
10.1007/s12221-017-7564-2
中图分类号
TB3 [工程材料学]; TS1 [纺织工业、染整工业];
学科分类号
0805 ; 080502 ; 0821 ;
摘要
Electrically conducting nanofibers based on cellulosic materials offer cheap and safe class of materials that can be used for water desalination. In the present work, high conducting cellulose triacetate (CTA) nanofibers containing multiwall carbon nanotubes (MWCNTs) with very low percolation threshold concentration (0.014 wt%) were produced by electrospinning. Unprecedentedly, a hydrophilic ionic liquid consists of 1-butyl-3-methylimidazolium chloride ([BMIM]Cl) was used to dissolve CTA producing a solution of 10 wt%. This CTA solution was used to engineer both bare CTA nanofibers and CTA nanofibers impregnated with MWCNT. The fabricated nanofibers were characterized by the field emission-scanning electron microscopy (FE-SEM) and the high-resolution transmission electron microscopy (HR-TEM). Both FE-SEM and HR-TEM images showed that the MWCNTs were inserted and uniformly distributed inside electrospun nanofibers. Furthermore, mechanical properties such as tensile strength of MWCNTs loaded-CTA electrospun nanofibers was significantly improved by up to 280 % and 270 % for the Young modulus, when compared with the bare CTA fibers. In addition, the surface properties as the hydrophilicity of electrospun nanofibers membrane was enhanced due to the presence of MWCNTs. Moreover, the electrical conductivity of MWCNT loaded-CTA electrospun nanofibers was greatly enhanced after the implementation of the MWCNTs inside the CTA fiber. The performance of composite nanofiber for water desalination was examined in a lab-scale classic capacitive deionization (CDI) unit, at different concentrations of salt. The obtained data revealed that the electro-adsorption of anions and cations on the surface of MWCNTs loaded-CTA electrospun nanofibers electrodes were monitored with time and their concentration were decreased progressively with time and reaches equilibrium.
引用
收藏
页码:2111 / 2117
页数:7
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