CO 2 sorption on surface-modified carbonaceous support: Probing the influence of the carbon black microporosity and surface polarity

2016 ◽  
Vol 360 ◽  
pp. 329-337 ◽  
Author(s):  
Valentina Gargiulo ◽  
Michela Alfè ◽  
Paola Ammendola ◽  
Federica Raganati ◽  
Riccardo Chirone
Keyword(s):  
Carbon Black ◽  
Surface Polarity ◽  
Surface Modified

scholarly journals Properties of Conductive Polyacrylonitrile Fibers Prepared by Using Benzoxazine Modified Carbon Black

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 179 ◽  
Author(s):  
Damiro Ahn ◽  
Hyun-Jung Choi ◽  
Ho-dong Kim ◽  
Sang Young Yeo
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Photoelectron Spectroscopy ◽  
Weight Ratio ◽  
Pan Fiber ◽  
Potential Applications ◽  
Conductive Fillers ◽  
Conductive Fibers ◽  
Surface Modified ◽  
Pan Fibers

Composites of carbon black (CB) and polymers are attractive for producing conductive fibers. Herein, to achieve improved interactions with polymers, the surface of CB was modified to form 4-aminobenzoyl-functionalized carbon black (ABCB), benzoxazine-functionalized carbon black (BZCB), and Ag-anchored carbon black (Ag-ABCB). The surface-modified CBs were characterized by Fourier transform infrared spectroscopy and thermogravimetric analysis, and X-ray photoelectron spectroscopy was utilized to confirm the presence of Ag in Ag-ABCB. Conductive polyacrylonitrile (PAN) fibers were wet-spun with conductive fillers (CB, ABCB, Ag-ABCB, and BZCB) to investigate the effects of various functional groups on the electrical and mechanical properties. After annealing the conductive PAN fibers, the conductivity and tensile strength greatly increased, whereas the diameter decreased. Notably, the fiber with a BZCB/PAN weight ratio of 12/88 possessed a conductivity of 8.9 × 10−4 S/cm, and strength of 110.4 MPa, and thus the highest conductivity and best mechanical properties in the conductive PAN fiber. These results indicate that the annealed BZCB/PAN fibers have potential applications in the manufacturing of antistatic fabrics.

Surface-modified carbon black for As(V) removal

2008 ◽  
Vol 319 (1) ◽  
pp. 53-62 ◽  
Author(s):  
Dipu Borah ◽  
Shigeo Satokawa ◽  
Shigeru Kato ◽  
Toshinori Kojima
Keyword(s):  
Carbon Black ◽  
Surface Modified

Measurement of Dispersion Stability of Surface-Modified Nanosized Carbon Black in Various Liquids

2007 ◽  
Vol 7 (11) ◽  
pp. 3827-3829 ◽  
Author(s):  
Heang Sin Jang ◽  
Dong-Wha Park ◽  
Sang Eun Shim
Keyword(s):  
Carbon Black ◽  
Colloidal Stability ◽  
Dispersion Stability ◽  
Scattering Method ◽  
Long Term Stability ◽  
Dispersion Agent ◽  
Surface Modified ◽  
Multiple Light Scattering ◽  
Effect Of Surface

The dispersion stability of nano-sized carbon black produced by a thermal plasma process was investigated using a novel multiple light scattering method. The effect of surface modification of carbon black on the dispersion stability was monitored in various polar and non-polar liquids including water, methanol, styrene, and toluene. The results show that carbon black functionalized with carboxylic anion groups has much improved colloidal stability in a polar solvent and the degree of dispersion stability is strongly related to the solubility parameter value of liquids. In addition, the carbon black with carboxylic anions has a long-term stability without any auxiliary dispersion agent such as a surfactant due to electrostatic repulsion.

Characterization and comparison of fluoroelastomer unfilled, filled with carbon nanotube (unmodified, acid or base surface modified) and carbon black using TGA-GCMS

2021 ◽  
pp. 009524432199040
Author(s):  
J Heidarian ◽  
A Hassan
Keyword(s):  
Thermal Stability ◽  
Carbon Nanotube ◽  
Carbon Black ◽  
Degradation Products ◽  
Base Surface ◽  
Temperature Range ◽  
Gas Drilling ◽  
Group A ◽  
Group B ◽  
Surface Modified

Carbon nanotube (CNT)-, surface-modified CNT: acid (–COOH) modified (MCNT) or base (–OH) modified (OHCNT), carbon black (CB)-filled fluoroelastomer (FE) and unfilled FE were prepared (CNT/FE, MCNT/FE, OHCNT/FE, CB/FE and FE). The thermal properties of the composites were assessed by TGA-GCMS and TGA and compared for all samples. TGA-GCMS results show that degradation products that obtained due to breakage of the CF2-CH2 bond (group A) and CF2-CF2 bond (group B) in base FE, obtained in lower temperatures and higher temperatures of TGA scan respectively, therefore CF2-CF2 bond is more thermally stable than CF2-CH2. For degradation products of group A and group B, the relative abundance decreased in the following orders respectively for all samples: CB/FE, CNT/FE, OHCNT/FE, FE, MCNT/FE; and MCNT/FE, OHCNT/FE, FE, CNT/FE, CB/FE. Therefore nanofillers and particularly surface-modified nanofillers produce less amount of group A degradation products and more amount of group B degradation products and therefore increase the thermal stability of the base FE. For all samples, the volatile degradation products that have the highest intensity are: (C6F7H2)•+, C4H6F+ and C6F11 + and the volatile degradation products are similar except for OHCNT/FE and MCNT/FE. TGA results also show that thermal stability reduced in the following orders in the lower temperature range and higher temperature range respectively: OHCNT/FE, FE, CB/FE, CNT/FE, MCNT/FE; and CB/FE, MCNT/FE, CNT/FE, FE, OHCNT/FE. Totally the results show that OHCNT/FE, MCNT/FE and CNT/FE can be used at high temperatures for making O-rings for very deep oil and gas drilling.

In Situ Kinetics and Thermodynamics of Polymer Adsorption on Chemically Modified Silica

1993 ◽  
Vol 304 ◽  
Author(s):  
Lawrence A. Zazzera ◽  
Matt Tirrell ◽  
John F. Evans
Keyword(s):  
Surface Preparation ◽  
Attenuated Total Reflection ◽  
Native Oxide ◽  
Strong Interactions ◽  
Surface Polarity ◽  
Chemically Modified Silica ◽  
Ft Ir ◽  
Modified Surface ◽  
Surface Modified

AbstractIn situ Fourier transform infrared (FT-IR) spectroscopy in an attenuated total reflection mode has been employed to examine the chemical modification of ozone-cleaned, native oxide on single crystal Si(100). This planar model for silica is subjected to solution modification using silane reagents which impart variable polarity to the modified surface through different termini of the modifier. These chemical modifications are followed in real time using FT-IR as a diagnostic of surface preparation; either by examining the appearance of a band for an IR chromophore of the modifier which is attached, or by monitoring the loss of the surface silanol groups consumed in the reaction. Following modification, polymer solutions (acrylates, siloxanes) are introduced into the cell and the dynamics of the adsorption followed by a chromophore of the polymer. Not only can the total amount of bound polymer be determined, but also in cases of strong interactions between the polymer and surface modified (e.g. OH... O=C) the bound fraction can be determined. Correlations between surface polarity and these experimentally determined quantities give insight in to the configuration(s) of the adsorbed polymers.

Measurement of Dispersion Stability of Surface-Modified Nanosized Carbon Black in Various Liquids

2007 ◽  
Vol 7 (11) ◽  
pp. 3827-3829 ◽  
Author(s):  
Heang Sin Jang ◽  
Dong-Wha Park ◽  
Sang Eun Shim
Keyword(s):  
Carbon Black ◽  
Colloidal Stability ◽  
Dispersion Stability ◽  
Scattering Method ◽  
Long Term Stability ◽  
Dispersion Agent ◽  
Surface Modified ◽  
Multiple Light Scattering ◽  
Effect Of Surface

The dispersion stability of nano-sized carbon black produced by a thermal plasma process was investigated using a novel multiple light scattering method. The effect of surface modification of carbon black on the dispersion stability was monitored in various polar and non-polar liquids including water, methanol, styrene, and toluene. The results show that carbon black functionalized with carboxylic anion groups has much improved colloidal stability in a polar solvent and the degree of dispersion stability is strongly related to the solubility parameter value of liquids. In addition, the carbon black with carboxylic anions has a long-term stability without any auxiliary dispersion agent such as a surfactant due to electrostatic repulsion.

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