Analysis of interfacial action of rectorite/thermoplastic polyurethane nanocomposites by inverse gas chromatography and molecular simulation

Ma, Xiaoyan; Qu, Xiaobo; Qilu, Zhang; Chen, Fang

doi:10.1016/j.polymer.2008.05.006

Cited by 24 publications

(18 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Inverse gas chromatography (IGC) is a commonly-used method for physicochemical characterization of the surface properties of divided solids and in the study of adsorption phenomena. IGC has already been implemented in the analysis of clays, such as attapulgite [17], bentonite [18], smectite [19], of polymers like chitin [20] and of various nanocomposites, such as montmorillonite/PVC [21], montmorillonite/polypyrole [22] and rectorite/thermoplastic polyurethane [23].…”

Section: Introductionmentioning

confidence: 99%

Characterization of chitosan/montmorillonite bionanocomposites by inverse gas chromatography

Bensalem

Hamdi

Confetto

et al. 2017

Colloids and Surfaces A: Physicochemical and Engineering Aspect

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Characterization of chitosan/montmorillonite bionanocomposites by inverse gas chromatography

Bensalem

Hamdi

Confetto

et al. 2017

Colloids and Surfaces A: Physicochemical and Engineering Aspect

View full text Add to dashboard Cite

show abstract

“…Equation 1 shows that the plot of DH/AN versus DN/AN is linear, with slope equal to K a and intercept equal to K b . The overall acid-base character of the biomass's surface can be evaluated from the K b /K a ratio (Ma et al 2008). If K b /K a [ 1, the surface is considered to be basic, meaning the surface of the solid prefers to donate electrons, while when K b /K a \ 1, the surface is considered to be acidic (Ma et al 2008;Cordeiro et al 2011a;Santos et al 2001).…”

Section: Theoreticalmentioning

confidence: 99%

“…The overall acid-base character of the biomass's surface can be evaluated from the K b /K a ratio (Ma et al 2008). If K b /K a [ 1, the surface is considered to be basic, meaning the surface of the solid prefers to donate electrons, while when K b /K a \ 1, the surface is considered to be acidic (Ma et al 2008;Cordeiro et al 2011a;Santos et al 2001). The AN, AN* and DN numbers for solvents commonly used in studying acid-base properties of sorbents are available in the literature, see Table 1 ( Bistac and Brogly 2001;Zhao and Boluck 2010).…”

Section: Theoreticalmentioning

confidence: 99%

“…The parameters K a and K b reflect the ability of the adsorbent surface to act as an electron acceptor and an electron donor, respectively. As discussed in the Theoretical section, if K b /K a [ 1, the surface can be considered to be basic and therefore the electron donor, while if K b / K a \ 1, the surface is the electron acceptor (Ma et al 2008;Cordeiro et al 2011a;Santos et al 2001). The K b /K a ratios for the untreated, acid-treated and organic solvent-treated biomass were found to be 9.22, 6.74 and 6.57, respectively, indicating that all the surfaces of the untreated and treated biomass are basic in nature.…”

Section: Acid-base Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Adsorption of volatile polar organic solvents on water hyacinth (Eichhornia crassipes) root biomass: thermodynamic parameters and mechanism

Mukaratirwa‐Muchanyereyi

Kugara

Zaranyika

2016

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

The adsorbent properties of dried water hyacinth root biomass towards four polar solvents (dichloromethane, ethyl acetate, diethyl ether and acetone) were studied by inverse gas chromatography between 40 and 70°C. The enthalpy of adsorption values obtained for the adsorption of the four solvents on untreated root biomass range from -51.234 kJ mol -1 for acetone, an amphoteric solvent, to -74.658 kJ mol -1 for dichloromethane, an acidic solvent. Mineral acid and organic solvent treatment led to reduction in the values of the enthalpy of adsorption for all four solvents. The Lewis acidity parameters calculated from the enthalpy of adsorption values were 0.408, 0.267 and 0.356, while the corresponding Lewis basicity parameters were 3.76, 1.80 and 2.34, respectively, for untreated, mineral acid-treated and organic solvent-treated water hyacinth root biomass. The Lewis basicity parameter-to-Lewis acidity parameter ratios for the untreated, acid-treated and organic solvent-treated biomass were found to be 9.22, 6.74 and 6.57, respectively, indicating (a) that all the surfaces of the untreated, mineral acid-treated and organic solvent-treated water hyacinth root biomass are basic in nature and (b) that for all volatile polar solvents studied, the adsorption interaction involves the lowest unoccupied molecular orbital of the solvent as the electron acceptor and the highest occupied molecular orbital of the water hyacinth root biomass surface adsorbent site as the electron donor.

show abstract

“…However, some recent measurements for nanoporous materials have shown some contradictory results that the effective thermal conductivity actually decreases with the reduced pore size [34] or particle size as in silica aerogels [35]. It is now known that the impact of all interfacial mechanisms become more significant at smaller, especially nanoscale [36,37]. Growing importance of the thermal contact resistance and the increased number of interfaces in finer particles were ascribed to cause the conflicting predictions.…”

Section: Introductionmentioning

confidence: 99%

Lattice Boltzmann Modeling of Thermal Conduction in Composites with Thermal Contact Resistance

Xie

Wang

et al. 2015

Commun. Comput. Phys.

View full text Add to dashboard Cite

Abstract. The effective thermal conductivity of composite materials with thermal contact resistance at interfaces is studied by lattice Boltzmann modeling in this work. We modified the non-dimensional partial bounce-back scheme, proposed by Han et al. [Int. J. Thermal Sci., 2008. 47: 1276-1283, to introduce a real thermal contact resistance at interfaces into the thermal lattice Boltzmann framework by re-deriving the redistribution function of heat at the phase interfaces for a corrected dimensional formulation. The modified scheme was validated in several cases with good agreement between the simulation results and the corresponding theoretical solutions. Furthermore, we predicted the effective thermal conductivities of composite materials using this method where the contact thermal resistance was not negligible, and revealed the effects of particle volume fraction, thermal contact resistance and particle size. The results in this study may provide a useful support for materials design and structure optimization. 65.80.-g PACS:

show abstract

Analysis of interfacial action of rectorite/thermoplastic polyurethane nanocomposites by inverse gas chromatography and molecular simulation

Cited by 24 publications

References 21 publications

Characterization of chitosan/montmorillonite bionanocomposites by inverse gas chromatography

Characterization of chitosan/montmorillonite bionanocomposites by inverse gas chromatography

Adsorption of volatile polar organic solvents on water hyacinth (Eichhornia crassipes) root biomass: thermodynamic parameters and mechanism

Lattice Boltzmann Modeling of Thermal Conduction in Composites with Thermal Contact Resistance

Contact Info

Product

Resources

About