Pore and crosslinking structures of cotton cellulose crosslinked with DMDHEU‐maleic acid

Abstract

Two dicarboxylic acids (maleic acid and tartaric acid) were used in conjunction with DMDHEU as the crosslinking agents to treat cotton fabric samples. The treated fabrics then were dyed with direct red 81. The results show that the values of the dye absorption, equilibrium absorption, rate constants, and the pore index of structural diffusion resistance constant for the various crosslinking agents are ranked as DMDHEU-tartaric acid Ͼ DMDHEUmaleic acid Ͼ DMDHEU alone at the same dyeing temperature. The activation energies for the three crosslinked fabrics are in the rank of DMDHEU Ͼ DMDHEU-maleic acid Ͼ DMDHEU-tartaric acid. The CL length values for the various crosslinking agent systems are in the series of DM-DHEU-tartaric acid Ͼ DMDHEU-maleic acid Ͼ DMDHEU alone for a given number of CL/AGU. The values of the pore index of structural diffusion resistance constant and dyeing rate constant are increased with the increase of CL length.

Formaldehyde‐free curing of cotton cellulose fabrics in anhydrous media

“…Hence, soaking the fabrics in DMF for 1 h at 50 °C has a negative effect on the mechanical properties of the fabrics. In previous reports, the cotton cellulose fabrics were mostly treated for 3 min at 160 °C; however, more recent publications suggest that with increasing temperatures up to 180 °C higher crease angles are obtained . Therefore, the second approach involves the curing of the fabrics at 180 °C for 3 min.…”

“…In several studies, mostly combinations of ethylene ureas 3 and other crosslinking reagents are used to reduce cost and maintain efficiency of the procedures simultaneously reducing the formaldehyde release to a lowest possible level . Formaldehyde‐free textile finishes involve polycarboxylic acids such as maleic acid, itaconic acid, citric acid, 1,2,3,4‐butanetetracarboxylic acid, or others .…”

Argon Plasma Treatment for Improving the Physical Properties of Crosslinked Cotton Fabrics with Dimethyloldihydroxyethyleneurea-Acrylic Acid

“…Additionally, some authors have shown that the physical properties of the finished fabrics were affected by the crosslinking structure of the crosslinking agent in/on the finished fabrics [9][10][11][12][13][14].…”

Water‐resistant modification of poly(vinyl alcohol)/polyamidoxime chelating fibers prepared by emulsion spinning and their adsorption properties

“…As the well‐known formalization modification for PVA fiber, sealing or crosslinking the free hydroxyl groups of PVA are the effective ways to elevate the water resistance of PVA fiber . However, the free hydroxyl groups of PVA were thought to participate the adsorption process of PVA/PAO composite chelating fibers, so they are not expected to be largely sealed or crosslinked in the formalization process.…”

“…The tetrahydroxyl DMDHEU has strong reactivity with hydroxyls, so it can also be used as the crosslinking agent for PVA. Different from FA, DMDHEU has larger molecular size, so its permeabiliy is weaker than that of FA, and it is more likely to form intermolecular crosslinking in PVA . Moreover, the DMDHEU treatment would increase the hydroxyl and uredio groups in adsorbent, which is beneficial for the adsorption performance of the adsorbents .…”