Effect of Surface Treatment for Carbon Nanotubes on Morphological and Rheological Properties of Polyarylene Ether Nitriles Nanocomposites

2011 ◽  
Vol 284-286 ◽  
pp. 1991-1996
Author(s):  
Ying Qing Zhan ◽  
Fan Bin Meng ◽  
Rui Zhao ◽  
Xiao Bo Liu
Keyword(s):  
Carbon Nanotubes ◽  
Morphological Observation ◽  
Casting Method ◽  
Arylene Ether ◽  
Dispersion State ◽  
Multi Walled Carbon Nanotubes ◽  
Solution Casting Method ◽  
Walled Carbon Nanotubes ◽  
Rheological Percolation ◽  
Effect Of Surface

Poly(arylene ether nitriles) (PEN) nanocomposites containing various functionalized multi-walled carbon nanotubes (MWCNTs) were prepared through solution-casting method. The as-prepared PEN nanocomoposites were investigated by parallel-plate rheometer, aiming at examining the effect of surface functionalizaion on the dispersion of MWCNTs by using viscoelastic properties. The results of linear viscoelasticy indicated that the 4-aminophenoxyphthalonitrile-grafted MWCNTs (MWCNTs-CN) presented better dispersion in PEN matrix than purified and carboxylic MWCNTs because of the corresponding composite showed the lowest rheological percolation threshold, which was further confirmed by morphological observation. Both the dispersion state and the surface functionalization of MWCNTs are very important to the rheological behaviors of PEN matrix.

Preparation of Multi-Walled Carbon Nanotubes (MWNTs)/Polymethyl Methacrylate (PMMA) Hybrid Membranes and their Sorption Performance of Benzene/Cyclohexane

2013 ◽  
Vol 740 ◽  
pp. 550-554
Author(s):  
Li Guang Wu ◽  
Yu Fei Chen ◽  
Yang Rong ◽  
Ting Wang ◽  
Yu Xing Wang
Keyword(s):  
Carbon Nanotubes ◽  
Polymethyl Methacrylate ◽  
Physical Adsorption ◽  
Separation Performance ◽  
Polar Group ◽  
Hybrid Membranes ◽  
Transmission Electron ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Effect Of Surface

Novel organic-inorganic hybrid membranes of polymethyl methacrylate (PMMA) containing multi-walled carbon nanotubes (MWNTs) were successfully prepared. Then, the swelling adsorption experiments of benzene/cyclohexane mixtures were employed to evaluate the performance of these membranes. Via transmission electron microscopy (TEM), Fourier transform infrared spectrophotometry (FTIR), the effect of surface modification on the morphology and properties of carbon nanotubes and hybrid membranes were studied. The results indicated that the separation performance for benzene/cyclohexane of the hybrid membranes depended on both the polarity of carbon nanotubes and the distribution of MWNTs in PMMA. Because the dispersion of MWNTs were obviously improved after acidification and ammonization modification, the hybrid membranes including modified MWNTs showed higher performance than membranes with un-modified MWNTs. In addition, a large number of polar group were introduced in the MWNTs during modification of acidification and ammonization, which depressed obviously the physical adsorption of cyclohexane by MWNTs. Therefore, these two changes in the properties of MWNTs both improved the separation performance of hybrid membranes.

Residual Stress and Rheological Behavior of Polymeric Nanocomposites

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Young Seok Song
Keyword(s):  
Carbon Nanotubes ◽  
Residual Stress ◽  
Polymeric Nanocomposites ◽  
Chemical Treatments ◽  
Dispersion State ◽  
Layer Removal Method ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Rheological Percolation ◽  
Effect Of Surface

AbstractRheological and mechanical characterizations were carried out for carbon nanotubes/poly(ethylene oxide) (PEO) nanocomposites to examine the effect of surface modification of carbon nanotubes on the CNT dispersion state. Residual stress in the gap-wise direction of the nanocomposites was measured using the layer removal method. It was found that the different chemical treatments for CNT surface make a big difference in the dispersion state of the CNTs and that the nanocomposites filled with better dispersed CNTs possess higher storage and elastic moduli. From the rheological observations, rheological percolation structure was found to exist in the nanocomposites, which was confirmed by morphological experiments. The residual stress data showed that stronger residual stress is developed in the PEO nanocomposites by non-isothermal cooling than in pure PEO.

Porphyrin–poly(arylene ether sulfone) covalently functionalized multi-walled carbon nanotubes: synthesis and enhanced broadband nonlinear optical properties

RSC Advances ◽  
2016 ◽  
Vol 6 (79) ◽  
pp. 75530-75540 ◽  
Author(s):  
Yinlong Du ◽  
Ningning Dong ◽  
Menghan Zhang ◽  
Yunhe Zhang ◽  
Jiashuang Luan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Optical Properties ◽  
Synergistic Effect ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Arylene Ether ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

A porphyrin polymer functionalized MWNT hybrid was synthesized with enhanced NLO performance due to the synergistic effect of different mechanism and photo-induced ET/PET process.

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