Effect of Organic Solvent on (EO)78(PO)30(EO)78 F68 Tri-Block Copolymer: Viscosity and Dynamic Light Scattering Measurements

2022 ◽  
pp. 1-11
Author(s):  
M. Ben Henda
Keyword(s):  
Light Scattering ◽  
Block Copolymer ◽  
Dynamic Light Scattering ◽  
Organic Solvent ◽  
Scattering Measurements

scholarly journals Sulfonitric Treatment of Multiwalled Carbon Nanotubes and Their Dispersibility in Water

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2442 ◽  
Author(s):  
Hui Liu ◽  
Jianfeng Wang ◽  
Jiachen Wang ◽  
Suping Cui
Keyword(s):  
Carbon Nanotubes ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Multiwalled Carbon Nanotubes ◽  
Photoelectron Spectroscopy ◽  
Oxidation Degree ◽  
Multiwalled Carbon ◽  
X Ray ◽  
Scattering Measurements ◽  
Ft Ir

In this study, Multiwalled carbon nanotubes (MWCNTs) were oxidized by a mixture of sulfuric acid and nitric acid (V:V = 3:1) at 70 °C for 1, 2, and 4 h, respectively. The oxidized MWCNTs were characterized by N2 adsorption, Fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), thermal gravimetric analysis (TGA), and Raman spectroscopy to determine the oxidation degree. The dispersion of the MWCNTs was investigated by UV-vis-NIR, SEM, and dynamic light scattering measurements. Results show that sulfonitric treatment increased the surface area and total pore volume and reduced the average pore diameter of MWCNTs. The treatment promoted the formation of oxidized species on the surface MWCNTs, as identified by FT-IR, TGA, and X-ray photoelectron spectroscopy measurements, and more oxygen-containing functional groups were generated when treatment time was extended. Moreover, a general relationship between oxidation degree and dispersibility of MWCNTs in water was established. UV-vis-NIR and dynamic light scattering measurements and SEM images revealed that MWCNTs with higher oxidation degree showed better dispersibility in water.

Dynamic Light Scattering from Dilute, Semidilute, and Concentrated Block Copolymer Solutions

1995 ◽  
Vol 28 (5) ◽  
pp. 1643-1653 ◽  
Author(s):  
C. Pan ◽  
W. Maurer ◽  
Z. Liu ◽  
T. P. Lodge ◽  
P. Stepanek ◽  
...  
Keyword(s):  
Light Scattering ◽  
Block Copolymer ◽  
Dynamic Light Scattering
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