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Revista de Chimie (Rev. Chim.), Year 2016, Volume 67, Issue 4,



Vasilica Popescu, Irina Crina Anca Sandu, Gabriel Popescu

Influence of Parameters of Polycondensation Stage on Ethyl Chitosan Grafting on Cotton

Abstract:

In this paper, the ethyl chitosan grafting on cotton is studied by varying two parameters of polycondensation stage: temperature (140-180°C) and catalyst (1.1 mmol zinc acetate, zinc chloride or magnesium chloride). The ethyl chitosan was prepared by direct alkylation method, the chitosan concentration varying from 0.1 to 2.1mmols; the molar ratios chitosan: alkylation agent: NaOH were (0.1-2.1): 1.1: 1.1. The FT-IR spectroscopic analysis certified the differences produced by these factors on the treated samples, confirming ethyl chitosan grafting on cotton. The grafting effects were estimated by the evaluation of values of wrinkle-recovering angles (dry WRA and wet WRA), breaking forces (on warp and weft) and mass losses after laundering and after abrasive friction. The statistical analysis of four grafting effects (dry WRA, wet WRA, breaking forces on warp and weft) led to low values for standard deviations and standard errors of the mean, showing that the obtained results have a high degree of confidence.

Keywords:
ethyl chitosan; FT-IR spectroscopy; grafting; catalyst; polycondensation temperature; statistical analysis

Issue: 2016, Volume 67, Issue 4
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