Ion-Exchange Characteristics of Chemically Modified Cotton Fabrics

Hoffpauir, Carroll L.; Guthrie, John D.

doi:10.1177/004051755002000903

Cited by 60 publications

(22 citation statements)

References 7 publications

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“…The ion exchange capacity was determined by the method of Hoffpauir and Guthrie. 4 Both fractions (a) and (b) have a considerably lower ion exchange capacity than would be expected for a simple cellulose acetate p-aminobenzoate with the observed nitrogen content. The products therefore probably contain poly-p-benzamide, probably as a graft copolymer but, possibly, to some extent also as a coprecipitated homopolymer.…”

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confidence: 87%

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Diazonium derivatives of cellulose as initiators of graft polymerization

Richards¹

1961

J. Appl. Polym. Sci.

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Cellulose p‐aminophenacyl ether (I) has been prepared from cotton and the partial p‐aminophenacyl ester of carboxymethyl cellulose (III) has also been prepared. Derivatives (I) and (III) have been diazotized and then used to initiate polymerization of acrylonitrile. In the presence of ferrous sulfate the polymerization proceeds to formation of a graft copolymer and no polyacrylonitrile homopolymer was detected. Attempts to graft styrene and vinyl acetate on the same derivatives were not successful. Thermal degradation of the diazonium derivatives leads to insolubilization, probably due to crosslinking by combination of free radicals. Attempts to prepare cellulose p‐aminobenzoate by reaction of cellulose derivatives with p‐aminobenzoyl chloride (IV) in the presence of a basic catalyst led to polymerization of (IV) and to the formation of a supposed cellulose–poly‐p‐benzamide graft copolymer.

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confidence: 87%

“…Yield: 1.20 g.; found, N 5.1% (20 parts polyacrylonitrile in 100 parts carboxymethyl cellulose requires N 5.0%). 4. Experiment (2) was repeated, replacing acrylonitrile with 10 ml.…”

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confidence: 99%

Diazonium derivatives of cellulose as initiators of graft polymerization

Richards¹

1961

J. Appl. Polym. Sci.

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“…Interactions between a chemically diverse set of potential solutes and an equally diverse set of surfaces suggested the need for detailed chemical understanding of adsorption and desorption processes. Hoffpauir and Guthrie [13] were perhaps the first to speak in terms relevant to LC as a means of assessing surface chemistries on fabrics, in this case the ion-exchange characteristics of modified cottons as a function of pH. Phosphorylated cellulose (cottons) were found to behave as di-basic acids, while sulfoxylated cellulose was a strong cation exchanger.…”

Section: Early Demonstrationsmentioning

confidence: 99%

Use of polymer fiber stationary phases for liquid chromatography separations: Part II – applications

Marcus¹

2009

J of Separation Science

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The idea of using polymer fibers as stationary phases for LC is not a new one. There are in fact a number of good reasons for which they should be considered. Presented here are a number of applications of polymer fiber stationary phases for chemical separations. Fibers placed in columns are employed in three basic formats: staple, whole fabrics, and aligned fibers. Natural and synthetic fibers have found use in a variety of chromatographic modes including RP, size exclusion chromatography (SEC), and IEC. Consistent among these examples are the ability to employ high mobile phase flow rates with minimal back pressures. The most promising applications are in the separation of macromolecules, where the mass transfer characteristics of the phases result in the ability to run at high linear velocities without penalty. This bodes well in particular for process applications.

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“…The final group of polymer fibers is the natural fibers, cellulose and wool. In actuality, these were the first of the fibrous stationary phases [41]. As the characteristics of the individual fibers in Table 3 are presented, one can also keep in mind that, as in the textile industry, combinations of fibers of different chemistries can be assembled as yarns to permit a multiplicity of separation characteristics [33, 42 -44].…”

Section: Chemical Rationale For the Use Of Fiber Phasesmentioning

confidence: 99%

“…Second, by virtue of the shear volume and diverse application of the base polymer materials (e. g., PET in clothing and drink bottles), the cost of fiber production is far less for the melt-spun polymers. The natural fibers, cellulose (cotton) and wool are clearly the most widely studied fiber materials [41]. Here again the dye chemistry literature describes the rich chemical reactivity and potential versatility of the fiber surfaces.…”

Section: Chemical Rationale For the Use Of Fiber Phasesmentioning

confidence: 99%

Use of polymer fiber stationary phases for liquid chromatography separations: Part I – physical and chemical rationale

Marcus

2008

J of Separation Science

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The idea of using polymer fibers as stationary phases for LC is not a new one. There are in fact a number of good reasons for which they should be considered. To this point though, they have not produced sufficiently good performance to garner much commercial interest. Presented here are the physical and chemical rationale by which they should show enhanced performance relative to conventional stationary phases. Most notably, the mass transport and hydrodynamic characteristics suggest applications in areas of macromolecule and prep-scale separations. Additionally, there exists an incredible wealth of polymer surface chemistries and potential derivatization pathways that greatly exceed what is practical on conventional silica supports. The potential for important impact suggests further research into polymer fiber phases.

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Ion-Exchange Characteristics of Chemically Modified Cotton Fabrics

Cited by 60 publications

References 7 publications

Diazonium derivatives of cellulose as initiators of graft polymerization

Diazonium derivatives of cellulose as initiators of graft polymerization

Use of polymer fiber stationary phases for liquid chromatography separations: Part II – applications

Use of polymer fiber stationary phases for liquid chromatography separations: Part I – physical and chemical rationale

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