Abstract
In order to enhance salt rejection level and high pressure mechanical integrity, functionalized nanokaolin decorated multiwall carbon nanotubes (FNKM, 0–5 wt % loading) were incorporated into a cellulose acetate (CA) matrix using high temperature solution mixing methodology. Scanning electron microscopy (SEM), X-ray diffraction technique (XRD), thermo-gravimetric analyzer (TGA) and Fourier transform infrared spectrometer (FTIR) were used to characterize the prepared membranes. The obtained results revealed that with increasing FNKM concentration in the host polymeric matrix, composite membrane’s structural, functional, thermal, water permeation/flux and salt rejection characteristics were also modified accordingly. Percent enhancement in salt rejection was increased around threefold by adding 5 wt % FNKM in CA.
Highlights
A vast variety of polymeric membranes from micro porosity to dense films/fibers are employed for a broad range of applications viz. desalination, chemical separation/purification, medical applications, gas separation, etc. [1,2,3,4,5]
Scanning electron microscopy (SEM) images of the synthesized polymeric membranes confirm the microporosity generation integrated throughout the polymeric films (Figure 1)
The present study revealed the synergistic impact of nanokaolin (NK) decorated multiwall carbon nanotubes (MWCNTs)
Summary
A vast variety of polymeric membranes from micro porosity to dense films/fibers are employed for a broad range of applications viz. desalination, chemical separation/purification, medical applications, gas separation, etc. [1,2,3,4,5]. A vast variety of polymeric membranes from micro porosity to dense films/fibers are employed for a broad range of applications viz. Are used to generate porosity (micro to dense size) within the polymeric matrix (material) [9]. Polymer composite membranes are prepared to enhance thermal, mechanical, electrical, magnetic and chemical integrity [6,10]. These membranes are categorized as: (a) polymer–polymer blending membranes, (b) particle-filled polymeric membranes, and (c) fiber-filled polymeric membranes. The interest to synthesized polymeric nanocomposite membranes (based on polymeric host matrix and nanoreinforcements) is generally increasing day by day [4,8,11].
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