Reagent Migration in Fabric Thickness in Pad-Dry-Cure Finishing

Yeh

J of Applied Polymer Sci

2003

ABSTRACT:We used three kinds of alkyl diallyl ammonium salts (methyl, ethyl, and propyl) in combination with dimethyloldihydroxyethyleneurea (DMDHEU) as crosslinking agents. The nitrogen content, dry crease recovery angle (DCRA), moisture regain, and wicking height for the DM-DHEU/alkyl diallyl ammonium salts were in the order of OCH 3 Ͼ OC 2 H 5 Ͼ OC 3 H 7 , but the wet crease recovery angle (WCRA) and tensile strength retention (TSR) were in the opposite order at the same resin concentration. For the same DCRA and TSR, the WCRA values for only DMDHEU were lower than those for DMDHEU/alkyl diallyl ammonium salts, and the WCRA values for DMDHEU/alkyl diallyl ammonium salts were in the order of OC 3 H 7 Ͼ OC 2 H 5 Ͼ OCH 3 . Both the OOH group of the cellulose and DMD-HEU could react with the vinyl or epoxy groups of the alkyl diallyl ammonium salts during the pad-dry-cure process. The surface migration for DMDHEU/alkyl diallyl ammonium salts was in the order of OCH 3 Ͼ OC 2 H 5 Ͼ OC 3 H 7 . Fabrics treated with DMDHEU/alkyl diallyl ammonium salts showed good antibacterial properties.

Section: Distribution Of the Crosslinking Agentsupporting

confidence: 64%

Crosslinking of cotton cellulose in the presence of alkyl diallyl ammonium salts. I. Physical properties and agent distribution

Yeh

J of Applied Polymer Sci

2003

“…A CS-5 Chroma-Sensor (Applied Color System) was used to measure the color depth of the dyed fabrics. Table I are plotted in Figure 1 according to the method described by Rowland et al [4,13], and the linear relationships are similar to their results [ 13]. K is the coefficient of absorption, S is the coefficient of scattering, KIS is color intensity calculated from the equation…”

Section: Direct Red 80supporting

confidence: 64%

Crosslinking of Sulfonated Cotton Cellulose

Chiu

Textile Research Journal

2000

Sulfonated and unsulfonated cotton fabrics are finished with DMDMDHEU to study the agent distribution and reaction kinetics. The surface concentration of the crosslinking agent on the finished fabrics is significant for sulfonated cottons. Specific reaction rate constants for sulfonated cottons are higher than for the unsulfonated fabric, and the rate constant for the higher degree of sulfonation is greater than for the lower degree. Sulfonation does not affect the energy needed for the crosslinking reaction. Enthalpies of activation for sulfonated fabrics are lower than for the unsulfonated fabric, and the higher the degree of sulfonation, the lower the enthalpy of activation. Entropies of activation decrease with increased degree of sulfonation. Sulfonation of cotton does affect the reaction state, but does not affect energy consumption in the reaction between cellulose and the crosslinking agent.

“…Those results may be caused by the pore structure and/or bonding dependence of the dye absorption. 11,12 Structural diffusion resistance constants are only slightly changed with increasing the dyeing temperature (Table I). Table I also shows that the structural diffusion resistance constants for the three crosslinked fabrics reveal the following rank: DMDHEU-tartaric acid Ͼ DMDHEU-maleic acid Ͼ DMDHEU.…”

Section: Pore Structuresmentioning

confidence: 99%

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

Wang

J of Applied Polymer Sci

Yao

et al. 2005

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.