Preparation and characterization of polyvinyl chloride based nanocomposite nanofiltration-membrane modified by iron oxide nanoparticles for lead removal from water

ABSTRACTLiquid crystalline elastomers (LCEs) are materials that reveal unusual mechanical, optical and thermal properties due to their molecular orientability characteristic of low molar mass liquid crystals while maintaining the mechanical elasticity distinctive of rubbers. As such, they are considered smart shape-changing responsive systems. In this work, we report on the preparation of magnetic sensitized nematic LCEs using iron oxide nanoparticles with loadings of up to 0.7 wt%. The resultant thermal and mechanical properties were characterized by differential scanning calorimetry, expansion/contraction experiments and extensional tests. The magnetic actuation ability was also evaluated for the neat elastomer and the composite with 0.5 wt% magnetic content, finding reversible contractions of up to 23% with the application of alternating magnetic fields (AMFs) of up to 48 kA/m at 300 kHz. Thus, we were able to demonstrate that the inclusion of magnetic nanoparticles yields LCEs with adjustable properties that can be tailored by changing the amount of particles embedded in the elastomeric matrix, which can be suitable for applications in actuation, sensing, or as smart substrates.

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Synthesis and characterization of superparamagnetic iron-oxide nanoparticles (SPIONs) and utilization of SPIONs in X-ray imaging

Applied Nanoscience ◽

10.1007/s13204-017-0583-x ◽

2017 ◽

Vol 7 (7) ◽

pp. 463-475 ◽

Cited By ~ 20

Author(s):

C. Justin ◽

Sheryl Ann Philip ◽

Antony V. Samrot

Keyword(s):

Iron Oxide ◽

Iron Oxide Nanoparticles ◽

Superparamagnetic Iron Oxide ◽

Superparamagnetic Iron Oxide Nanoparticles ◽

Synthesis And Characterization ◽

Oxide Nanoparticles ◽

X Ray ◽

X Ray Imaging

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Thermoresponsive hybrid double-crosslinked networks using magnetic iron oxide nanoparticles as crossing points

Polymer Chemistry ◽

10.1039/c8py01006d ◽

2018 ◽

Vol 9 (37) ◽

pp. 4642-4650 ◽

Cited By ~ 4

Author(s):

Thomas Blin ◽

Antoine Niederberger ◽

Lazhar Benyahia ◽

Jérôme Fresnais ◽

Véronique Montembault ◽

...

Keyword(s):

Iron Oxide ◽

Iron Oxide Nanoparticles ◽

Alder Reaction ◽

Diels Alder ◽

Oxide Nanoparticles ◽

Magnetic Iron Oxide Nanoparticles ◽

Diels Alder Reaction ◽

Crosslinked Networks ◽

Stimuli Sensitive

Preparation and characterization of stimuli-sensitive hybrid double-crosslinked hydrogels based on iron oxide nanoparticles as the nano-crosslinkers and a difuran-functionalized PEO as the diene partner for the thermoreversible Diels–Alder reaction.

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Preparation and application of magnetite nanoparticles immobilized on cellulose acetate nanofibers for lead removal from polluted water

Water Science & Technology Water Supply ◽

10.2166/ws.2016.124 ◽

2016 ◽

Vol 17 (1) ◽

pp. 176-187 ◽

Cited By ~ 11

Author(s):

Thanaa I. Shalaby ◽

Marwa F. El-Kady ◽

Abd El Halem M. Zaki ◽

Soheir M. El-Kholy

Keyword(s):

Iron Oxide ◽

Cellulose Acetate ◽

Iron Oxide Nanoparticles ◽

Composite Nanofibers ◽

Polluted Water ◽

Oxide Nanoparticles ◽

Lead Removal ◽

Order Model ◽

Solution Ph ◽

Ft Ir

Novel magnetic cellulose acetate (CA) nanofibers were fabricated using an electrospinning process. Co-precipitated magnetite iron oxide nanoparticles were immobilized onto CA nanofibers at different weight ratios (0.2–2.5% wt/v) with a CA concentration of 15% (wt %), applied electric voltage of 20 kV, feeding rate of 1.5 ml/h and 7 cm distance between needle tip and collector. The prepared iron oxide nanoparticles were characterized using X-ray diffraction, a transmission electron microscope, a Fourier transform infrared spectrophotometer (FT-IR) and a vibrating sample magnetometer (VSM). The magnetic nanofibers were characterized by scanning electron microscopy, FT-IR, thermogravimetric analysis and VSM. The fabricated composite nanofibers were evaluated as a sorbent matrix for lead decontamination from aqueous solution using a batch technique. The influence of solution pH, contact time and adsorbent concentration on the removal efficiency was investigated. Adsorption kinetics models and isotherms were applied to the lead decontamination process onto the fabricated composite nanofibers. The kinetics of the sorption process revealed that the pseudo-second-order model fitted relatively better than the pseudo-first-order model. On the other hand, both the Langmuir and Freundlich isotherms gave a comparable fit to the adsorption data, with a high coefficient of regression of 0.999.

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