Preparation and characterization of carboxylated multiwalled carbon nanotube/polyamide composite nanofiltration membranes with improved performance

2017 ◽  
Vol 134 (36) ◽  
pp. 45268 ◽  
Author(s):  
Hongbin Li ◽  
Wenying Shi ◽  
Yuheng Su ◽  
Haixia Zhang ◽  
Xiaohong Qin
Keyword(s):  
Carbon Nanotube ◽  
Multiwalled Carbon Nanotube ◽  
Nanofiltration Membranes ◽  
Multiwalled Carbon ◽  
Improved Performance

The Preparation and Characterization of Polybenzoxazole Copolymerized with Multiwalled Carbon Nanotube via Direct Friedel-Crafts Acylation

2014 ◽  
Vol 989-994 ◽  
pp. 560-563
Author(s):  
Yong Chen ◽  
Jun Qian ◽  
Qi Xin Zhuang ◽  
Zhe Wen Han
Keyword(s):  
Carbon Nanotube ◽  
Polyphosphoric Acid ◽  
Multiwalled Carbon Nanotube ◽  
X Ray Diffraction ◽  
Acylation Reaction ◽  
Multiwalled Carbon ◽  
Sem Images ◽  
X Ray ◽  
Electronic Microscope

Multiwalled carbon nanotube (MWCNT) was subjected a copolymerization reaction with 4, 6-diaminoresorcinol salt (DAR•2HCl) and terephthalic acid (TA) in polyphosphoric acid (PPA) by Friedel-Crafts acylation reaction without any acid treatment or modification. The structure and morphology of the as-prepared poly (p-phenylene benzobisoxazole) (PBO)/MWCNT nanocomposites were characterized by X-ray diffraction (XRD) and scanning electronic microscope (SEM). The SEM images indicated that MWCNTs can disperse in PBO matrix uniformly without agglomeration and MWCNTs have been introduced into PBO matrix by covalent bonding via Friedel-Crafts acylation between MWCNTs and TA.

Multiwalled carbon nanotube/sulfanyl porphyrazine hybrids deposited on glassy carbon electrode — effect of nitro peripheral groups on electrochemical properties

2017 ◽  
Vol 21 (04-06) ◽  
pp. 295-301 ◽  
Author(s):  
Michal Falkowski ◽  
Tomasz Rebis ◽  
Jaroslaw Piskorz ◽  
Lukasz Popenda ◽  
Stefan Jurga ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Electrochemical Properties ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Aqueous Media ◽  
Differential Pulse ◽  
Multiwalled Carbon Nanotube ◽  
Carbon Electrode ◽  
Multiwalled Carbon

We report on the synthesis, MS, UV-vis, NMR, HPLC and electrochemical characterization of magnesium sulfanyl porphyrazine with 2-[2-(4-nitrophenoxy)ethoxy]ethylsulfanyl substituents in the periphery. The electrochemical properties of novel macrocycle were studied by cyclic voltammetry and differential pulse voltammetry in non-aqueous electrolyte. The experimental data indicated the occurrence of clearly defined four redox couples corresponded to one-electron reactions of the [Formula: see text]-conjugated porphyrazine ring and substituents in the periphery. Multiwalled carbon nanotube/sulfanyl porphyrazine hybrids deposited on a glassy carbon electrode allowed for the evaluation of the effect of nitro peripheral groups on the electrochemical properties. The electrochemical behavior of immobilized nitro porphyrazine was consistent with the reduction mechanism for the various arylnitro compounds in aqueous media, with two processes characteristic of the redox transitions of the arylnitro group to the corresponding arylhydroxylamine and/or arylhydroxylamine–arylnitroso groups.

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