Ensaios de carboximetilação de tecido de algodão para suporte de hkust-1

Abstract

Surface modifications of textile materials are carried out in order to improve and increase the chemical interactions between metalorganic networks (MOFs) and the textile substrate. The textile finishing with nanomaterials, although presenting excellent results in functionalizations, has some limitations regarding chemical interactions. These limitations are mainly verified in the low durability of these finishes. Metalorganic networks are crystal structures formed by a metal intercalated by an organic ligand. These metal­organic materials are examples of materials applied to textile articles in search of new features. Cotton is a cellulosic fiber of great commercial importance, and has good absorption capacity and good breathability, however, because of this it is susceptible to developing microorganisms on its surface. This work had as objective the direct application of HKUST­1 in cotton fabric modified by carboxylation. The material obtained by direct application of HKUST­1 was characterized by X­Ray Diffractometry, peaks present at coordinates 2θ = 14.7° and 16.5° are not detected as a possible consequence of carboxymethylation that alters the structure of the cellulose fiber, Fourier Transform Infrared Spectroscopy does not present a significant peak due to the extension of the cellulose molecule, the CIELAB Spectrophotometry results indicate a higher ΔE in non­carboxylated sample and pHPCZ indicates the influence of negative charges on the surface of the material. With the results obtained, it can be concluded that the direct application of the MOF generated results that could be further studied, but satisfactory.