Thermodynamics of Adsorption ofn-Alkanes on Maleated Wood Fibers by Inverse Gas Chromatography

Kazayawoko, M.; Balatinecz, John J.; Romansky, Marianne

doi:10.1006/jcis.1997.4892

Cited by 23 publications

(12 citation statements)

References 14 publications

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“…Remembering now that the force readout F, which would be obtained from a Wilhelmy balance measurement on each of these materials, is given by Eq. [9] above, we see that the solid-liquid interfacial submicroscopic area increase per unit immersion depth, ∂ A SL /∂z, is different for the two materials when the liquid is water (due to pores). With respect to hexadecane, which in both cases does not penetrate into the pores and hence only probes a microscopic area, the materials behave the same (nonabsorbing) and the (identical) perimeters are obtained from the (identical) force-readouts.…”

Section: Surface and Interface Property Determination By The Wilhelmymentioning

confidence: 92%

“…Furthermore, it must be realized that the time t a local point, (x, y), on the surface has been in contact with the liquid, which determines γ SL (t) at this point, depends on the speed of immersion, v. This phenomenon results in a contact angle which may change considerably during a wetting measurement as can be seen from expressions [8], [9], and [10]: In G 1 , the part z 0 γ SL y P(x) dx must be replaced with a time-dependent one via γ SL y = F(x, t). The nonequilibrium hysteresis which may result from this is difficult to separate from the well-known (quasi-)equilibrium hysteresis mentioned in the introduction.…”

Section: Surface and Interface Property Determination By The Wilhelmymentioning

confidence: 98%

“…Identifying (∂G 2 /∂z) with the force, F, it follows that [9] which is the Wilhelmy formula, i.e., F = Pγ LV cos(θ ), [10] where the contact angle, θ , is defined through the relationship γ LV cos(θ ) = γ SV − γ SL , and it is assumed that γ SV and γ SL do not depend on x, y. Only in this ideal case is it possible to interpret θ geometrically as an actual angle through the demand of force balance at the three-phase boundary line.…”

Section: Surface and Interface Property Determination By The Wilhelmymentioning

confidence: 99%

“…A popular technique is the Wilhelmy technique (1-3) but other techniques, such as inverse gas chromatography (IGC) (4)(5)(6)(7)(8)(9), may in principle supply the same information. The interpretation of data often relies on equilibrium wetting theories, most commonly surface energy component (SEC) theories (11)(12)(13)(14)(15)(16), which have been derived to de- 1 To whom correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Nonequilibrium Phenomena Influencing the Wetting Behavior of Plant Fibers

Barsberg¹,

Thygesen

2001

Journal of Colloid and Interface Science

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Section: Surface and Interface Property Determination By The Wilhelmymentioning

confidence: 92%

Section: Surface and Interface Property Determination By The Wilhelmymentioning

confidence: 98%

Section: Surface and Interface Property Determination By The Wilhelmymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nonequilibrium Phenomena Influencing the Wetting Behavior of Plant Fibers

Barsberg¹,

Thygesen

2001

Journal of Colloid and Interface Science

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“…Different results had been obtained previously by Lee and Luner (1989). Cellulose and lignocellulosic fibers were treated with maleated polypropylene, dichlorodiethylsilane (or dichlorodimethylsilane), c-aminopropyltriethoxysilane, and phthalic anhydride, and analysed by IGC (Felix and Gatenholm 1993b;Felix et al 1993;Kazayawoko et al 1997Kazayawoko et al , 1999Coupas et al 1998;Matuana et al 1998Matuana et al , 1999. Significant changes of the fiber's acid-base properties have been found, as summarized in Table 3 for newsprint fibers.…”

Section: Cellulose Analyses By Igcmentioning

confidence: 99%

The surface properties of cellulose and lignocellulosic materials assessed by inverse gas chromatography: a review

Gamelas

2013

Cellulose

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The physicochemical surface properties of cellulose and lignocellulosic materials are of major importance in the context of the production of composites, in papermaking, and textile area. These properties can be evaluated by using inverse gas chromatography (IGC), a particularly suitable technique for the characterization of the surface properties of fibrous materials and powders. At infinite dilution conditions of appropriate gas probes, IGC may provide important parameters including the dispersive component of the surface energy of the material under analysis, thermodynamic data on the adsorption of specific probes, and Lewis acid-base interaction parameters between the matrix and the filler of composite materials. This paper critically reviews the most relevant results available in the literature concerning the characterization of cellulose and lignocellulosic materials using IGC. Emphasis will be put into the cellulose and nanocellulose surface properties, changes in the surface properties of cellulose and lignocellulosic materials after chemical and physical modifications, and in the compatibility of cellulose-based materials with polymeric matrices. The surface properties of non-woody fibers will also be considered. Before discussing the results available in the literature, the theoretical background and the main approaches used for the calculation of parameters accessed by IGC will be given. It is expected that this review can contribute to a better knowledge of the physicochemical surface properties of cellulosics.

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Inverse Gas Chromatography in Analysis of Polymers

Guillet¹,

Al‐Saigh²

2000

Encyclopedia of Analytical Chemistry

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This article describes the application of inverse gas chromatography (IGC) to the study of synthetic and natural polymers. The word “inverse” is used to indicate that the component of interest is the stationary phase, either as a finely divided powder or coating, dispersed on a suitable inert support and packed into a chromatographic column. The time required for a probe molecule to pass through the column gives a measure of the molecular interactions between the probe and the polymer which can be quantified with the help of chromatographic theory. Historically, most thermodynamic studies on polymers were carried out in dilute solution, but IGC provides information on condensed phases under conditions much more similar to those under which polymers are actually used. Using this technique, melting, glass and other solid‐phase transitions can be studied and quantified. Degrees of crystallinity can be determined in an unambiguous procedure without calibration by other methods. Solubility, permeability and diffusion constants can be determined for probe molecules. IGC is also used extensively in determining the permeability of additives such as antioxidants in polymers, as well as thermodynamic quantities such as activity coefficients, heats of solution, Flory–Huggins interaction parameters (χ), and solubility parameters. Surface areas can be measured at any desired temperature by the determination of the adsorption isotherms of suitable probes. Measurements on polymer blends can yield important information on polymer–polymer interactions and can be used to predict the compatibility of the components over a wide range of temperatures. The use of finite concentration IGC provides a rapid method of determining the density of crosslinks in rubber‐like polymers. Almost any commercial gas chromatograph can be easily modified to carry out IGC experiments by procedures described in this report. The method provides a wealth of information of both fundamental and practical importance in the study of polymeric materials.

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Thermodynamics of Adsorption ofn-Alkanes on Maleated Wood Fibers by Inverse Gas Chromatography

Cited by 23 publications

References 14 publications

Nonequilibrium Phenomena Influencing the Wetting Behavior of Plant Fibers

Nonequilibrium Phenomena Influencing the Wetting Behavior of Plant Fibers

The surface properties of cellulose and lignocellulosic materials assessed by inverse gas chromatography: a review

Inverse Gas Chromatography in Analysis of Polymers

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