De Hong Cheng

Application of Ionic Liquid in Silk Dyeing

In this paper ionic liquid 1-butyl-3-methylimidazolium chloride (BmimCl) as accelerating agent was applied in silk dyeing and the dyeing performances of silk with ionic liquid were determined under different dyeing conditions. The obtained results indicated that the rate of dye uptake was about 85.4%, the K/S value was 11.2, breaking strength was 426 when 2 g silk was immersed in 60 ml dye solution, the concentration of ionic liquid was 2.0%, dyeing temperature was 50 °C and bath ratio was 1:30. Investigation on dyeing mechanism of silk with ionic liquid indicated that ionic liquid BmimCl interacted with amino acid in surface of silk and dyes through the electrostatic interaction between cation Bmim+ and the CO2- group of amino acid and SO3- group of dye in dyeing process.

Flocculation of Quaternary Chitosan on Acid Dyeing Waste Water

In order to increase the positively charge, solubility in water and grafted degree of chitosan, quaternary chitosan was synthesized with chitosan and glycidyl-trimethyl-ammonium chloride by the heterogeneous reaction. FT-IR was used to characterize the structure of the synthesized. The quaternary chitosan was then used to treat simulated acid dyeing wastewater, the effect of quaternary chitosan concentration, agitation mode and pH values on flocculation were discussed. The results indicated that the H+ in nucleophilic center-NH2 was displaced by-CH2CH(OH)CH2N+(CH3)3 and the 2-hydroxypropyltrimethyl ammonium chloride chitosan (quaternary chitosan) was synthesized. When applied to treatment of acid dye waste water, the decolorization rate was 95.5%, and the COD removal was 86.4%.

Performance of Foam and Application in Foam Finishing of Textile

Foaming finishing was a kind of dyeing and finishing technology with obvious energy saving effect. In this paper performance of foaming stock solution, compatibility of foam system, foaming finishing of cotton fabrics was investigated. The initial solution time, half life and foaming ratio of lauryl sodium sulfate as anionic foaming agent were determined. The obtained results indicated that advantages of foaming finishing of cotton fabrics included obvious low up-take and less pollution in crease resistant and water repellent finishing. The finishing performances of cotton fabrics with foaming finishing were the same level with that of the conventional padding finishing process

Characterization and Properties of Antheraea pernyi Silk Finished with Reactive Quaternary Ammonium Salt of Chitosan

In order to obtain a water soluble and reactive chitosan derivative, quaternary ammonium salt groups and acrylamidomethyl groups were introduced to chitosan by two steps. The chitosan derivative, reactive quaternary ammonium salt of chitosan, was then applied to Antheraea pernyi (A. pernyi) silk by padding and curing method. FT-IR, XRD and SEM were used to characterize the structure of A. pernyi silk before and after treatment. The peak in FT-IR spectra at 1480 cm-1 and 1650 cm-1 revealed the crosslinking reactions of A. pernyi silk fibroin and reactive quaternized chitosan. The XRD results indicated the crystallinity of the treated silk fiber increase a little in comparison with the untreated ones. SEM images clearly showed the reactive quaternary ammonium salt of chitosan attached on the surface of the treated A. pernyi silk fiber, while the surface of the untreated sample was relatively smooth. The thermal stability of the treated silk fiber was enhanced compared to the untreated one by DSC analysis. It was also found that the antibacterial activity of the treated A. pernyi silk fabric against E. coli was more than 99%.

Investigation on Dyeing Performances of the Modified Cotton Fabric with Ionic Liquid as Modifier

in this paper the dyeing performances of the modified cotton fabric with ionic liquid 1-butyl-3-methylimizolium chloride as modifier was investigated. The effect of pH value, dosage of ionic liquid, modified time, modified temperature on the dyeing performances of the modified cotton fabric was determined. The obtained results indicated that after the cotton fabric was modified by ionic liquid under the alkaline the dyeing performances of the modified cotton fabric was obviously enhanced. The K/S value of the modified cotton fabric was about 1.42 more than that of the untreated cotton fabric, the soaping fastness, rubbing fastness and breaking strength also were obviously enhanced.

Characteristics of Cotton Fabric Modified with Ionic Liquid as Modifier

in this paper ionic liquid 1-butyl-3-methylimizolium chloride was applied to modify the cotton fabric. The modified cotton fabric was characterized by FT-IR spectra, microscopy determination and the thermogravimetric analysis (DSC). The dyeing performances of the modified cotton fabric were determined. The results indicated that the dyeing performances of the modified cotton fabric were more than that of the unmodified cotton fabric.

Textile Properties of Tussah Silk Fabric by Eco-Friendly Crosslinking Agents Modification

To increase the wrinkle resistant property of tussah silk fabric, the eco-friendly crosslinking agents of citric acid (CA) was applied to tussah silk wrinkle resistant finishing process. Tussah silk fabric was treated with a conventional pad-dry-cure method. The finishing effects of tussah silk fabric including wrinkle recovery angle, whiteness and mechanical properties were characterized. The finishing agents CA in the presence of catalyst of sodium monophosphate (SHP) as well as the treatment conditions significantly affected the anti-wrinkle effects of treated tussah silk fabrics. The treated fabric samples showed increased wrinkle resistant property. The retention rate of breaking strength and whiteness of CA treatment tussah silk meet to the demands of the fabric treatment.

Synthesis of Oktakis (tetramethylammonium)-T8-silisesquioxane and its Application in Polyester Fabric Functional Modification

To improve the properties of polyester fabric, the oktakis (tetra-methyl-ammonium)-T8-silisesquioxane (TMA-POSS) is applied to modify polyester fabric. TMA-POSS is synthesized by using tetraethyl orthosilicate and tetramethylammonium hydroxide and the structure of TMA-POSS is characterized by FT-IR spectra and the particle size distribution of TMA-POSS is measured by a size analyzer. Antistatic property, wetting property and dyeing performances of the modified polyester fabric are investigated. The results indicate that when the TMA-POSS concentration is larger than 4% (o.w.f.), the wetting angle reached up to 0; the peak voltage, attenuation cycle and capillary value are 1283.0 V, 16.0cm and 3.9s respectively.

Influence of Silica Sol on the Properties of Cotton Fabric

The cotton fabric was modified with polycarboxylic acid, silica sol and KH-550, and the modification effect was characterized by the capillary effect value, tension strength value, antistatic capability value and wetting contact angle. The results showed that the hydrophilic and tension strength of the modified fabrics were much better than those of non-modified ones. But the antistatic property of the modified cotton fabric was slightly lower.

Research on the Bleaching Process of the Non-Silicon Oxygen Bleaching Stabilizer

In this study, a type of non-silicon oxygen bleaching stabilizer was used to cotton fabric in the hydrogen peroxide bleaching process. This type of novel non-silicon oxygen bleaching stabilizer was prepared mainly with ethylene diamine tetraacetic acid (EDTA) and magnesium chloride. The results showed that adding the non-silicon oxygen bleaching stabilizer into the bleaching solution obviously decreased the hydrogen peroxide decomposition rate and improved the fabric whiteness. Optimal conditions was found as follow: non-silicon oxygen bleaching stabilizer 4.5 g/l; bleaching temperature 75-85 °C; pH of bleaching liquid 11; bleaching time 40-45 min. In summary, the results showed that the self-made non-silicon oxygen bleaching stabilizer could make the cotton fabrics obtained great whiteness, capillary ability and breaking strength.