| Summary: | 博士 === 國立臺灣科技大學 === 高分子工程系 === 94 === In this study, we used three metallic salts to after-treat the DMDHEU-AA crosslinked cotton fabrics, and find that the DCRA, WCRA, TSR and MR values of the crosslinked and after-treated fabrics are in the order of Ag＋ > Cu＋2 > Al＋3 at a same DMDHEU-AA concentration in padding bath. The DCRA and WCRA of the crosslinked and after-treated fabrics are higher than those of the DMDHEU-AA crosslinked fabrics, and those for crosslinked and after-treated fabrics are in the order of Ag＋ > Cu＋2 > Al＋3 at a given values of TSR. For a given CL/AGU, DCRA and TSR values for the crosslinked and after-treated fabrics are higher than those for the DMDHEU-AA crosslinked fabrics, and those for crosslinked and after-treated fabrics are in the order of Ag＋ > Cu＋2 > Al＋3; but WCRA values of the various treated fabrics show that the values for the crosslinked and after-treated fabrics are lower than those for the DMDHEU-AA crosslinked fabrics, and those for crosslinked and after-treated fabrics are in the order of Ag＋ > Cu＋2 > Al＋3. IR spectra clearly show the interaction between the －OH group of the cellulose and the metallic ions, which are different from each other on the bonding state for the various metallic ions, and the strength of the bonding for the various metallic ions are in the order of Ag＋ > Cu＋2 > Al＋3. All crosslinked and after-treated fabric samples have good values of odor absorption, anti-bacteria, and washing fastness.
In addition, the low temperature plasma treatment was applied for finishing the cotton fabrics, and the effect of plasma treatment on the durable press finishing of cotton fabric was studied. Both DMDHEU alone and DMDHEU-AA crosslinking agents were used to finish cotton fabrics with various processes by changing agent concentrations in the bath. Experimental data indicate that the plasma treatment within the pad-dry-plasma-cure process can induce the cotton fabrics surface binding of more crosslinking agents than the samples without plasma treatment. For the same crosslinking agents, we find that the DCRA, WCRA and TSR values of the pad-dry-plasma-cure fabrics are higher than the pad-dry-cure fabrics at a given value of nitrogen content. In addition, the values of TSR for the pad-dry-plasma-cure process are also higher than those for the pad-dry-cure process at a given DCRA or WCRA. For all the four treated processes, the N content, DCRA and WCRA values of the DMDHEU-AA-treated fabrics are all higher than those of the DMDHEU-treated fabrics at a same resin concentration in the bath, but the TSR values are inverse in all cases. For the same crosslinking agents, we also find that the numbers of CL/AGU and CL length of pad-dry-plasma-cure fabrics are higher than the pad-dry-cure fabrics at a same DMDHEU concentration in the bath. And at a same CL/AGU value, the DCRA, WCRA and TSR values of the pad-dry-plasma-cure fabrics are higher than those for the pad-dry-cure fabrics. Those results show that the plasma treatment can not only introduce the crosslinking reaction between the resins and cellulose molecules, but also can clearly improve physical properties such as tensile strength and wrinkle recovery angle.
In this study, we also used the combined DMDHEU and acrylic acid crosslinking agent to treat cotton fabric under a pad-dry-plasma-cure process to study the pore property, anti-bacterial property, and agent distribution. For both direct dyes used, we find that the values of dye absorptions, equilibrium absorption and the rate constants, structural diffusion resistance constants for the pad-dry-plasma-cure treated fabrics are lower than those for pad-dry-cure treated fabrics at the initial dyeing time duration, but the activation energies for the two finished fabrics (dyed with the same direct dye) are ranked pad-dry-plasma-cure＞ pad-dry-cure. The carboxylic acid group of acrylic acid could react with copper sulfate to bind the copper ion on the treated fabric surface, which could improve the anti-bacterial ability significantly. The surface distribution of crosslinking agent on the finished fabrics is somewhat higher for pad-dry-plasma-cure process than for pad-dry-cure process.
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