Abstract: In this study the natural dye Anthocyanins was extracted from red-onion skins with the ethanol solution and then the obtained dye was applied to dye tussah silk strips with four methods: direct staining, pre-mordant, together-mordant and last-mordant. The best dye-uptake of the tussah silk strips could be obtained when pH value was 4.5, temperature was 60°C and concentration of dye was 10 % with the direct staining. The different colors of dusky brown, brown, faint yellow, light green, reddish brown, cyan and green could be obtained by using chitosan and various salts of transition elements (Fe2+,Fe3+,Mg2+,Al3+,Cu2+, Mn2+ ) as mordant agents and color tones, color depth and brightness were influenced by different mordant and staining techniques. The result also showed that the silk strips were dyed poorly without any mordant and the dyed tussah silk strips had good fastness and the anti-bacterial activities.
Abstract: This paper discussed the application of super soft amino-modified silicone oil SM-20 on the PET fabrics, and the experimental conditions such as the dosage of SM-20, cure temperature, cure time, pH value of the solution etc. were optimized according to the influences on the polyester (PET) fabrics after using SM-20 finishing agent. Based on IR spectrum and SEM, the SM-20 finishing agent was verified to possess excellent performance of the PET fabrics for the soft treatment, and the optimal process conditions were: SM-20 10 g/L, pH value 5.0-6.0 (adjusting by acetic acid). After soft treatment by SM-20, the drape coefficient, stiffness and strength of the fabric decreased, while the recovery angle and softness increased.
Abstract: The photoyellowing and poor UV-protection ability of silk, wool and nylon fabric can be improved through the anti-UV finishing with UV-absorbers. This study is concerned with the adsorption properties of a water-soluble benzotriazole UV-absorber on silk, wool and nylon. It was found that the adsorption kinetics of the UV absorber on the three fibers followed the pseudo second-order kinetic model and the rate constant indicated a faster adsorption rate for UV absorber on silk than those for wool and nylon. The activation energies for the adsorption process on silk, wool and nylon were found to be 49.74, 63.92 and 78.21 kJ/mol, respectively. The adsorption of the UV-absorber on silk and wool had the characteristics of low affinity constant and high saturation value whereas that on nylon showed a small saturation value with a remarkably high affinity constant. The electrostatic interactions between the positively charged amino groups in fibers and the anionic sulfonate groups in UV absorber have an important role in the adsorption of UV absorber.
Abstract: To study the relationship between the content of silver-plated fibers in fabrics and the antibacterial performance of fabrics, five sets of samples with common polyester yarns and silver-plated polyamide yarns were manufactured for the experiment; a qualitative antibacterial test with flask-shaking method was performed and compared for fabrics with different content of silver-plated fibers. The results show that the fabrics with silver-plated fibers have good antibacterial effect, and the bacterial inhibition rate will be improved as the content of silver-plated fibers increasing. When the content of silver-plated fibers is 3.6%, the bacterial inhibition rate for coli form will reach to 76.92%, when the content of silver-plated fibers is higher than 11.99%, the fabrics have better antibacterial property for coli form and the bacterial inhibition rate is higher than 99%.
Abstract: In order to resolve the problem of water pollution owing to using a large number of urea in silk printing with reactive dyes, TEG (Triethylene glycol/3, 6-dioxaoctane-1/8-diol) was used to replace the urea. The effects of TEG on the performance of monochromic and combination printed fabrics were studied through testing K/S values (color depth) and Delta E (color differences) of printed fabrics. Meanwhile, the effect of TEG and urea on the solubility of reactive dye and the moisture absorbency of silk fabric were compared by testing the solubility of reactive dyes and the diameter of silk fiber respectively. The results indicated that the best replacement ratio of TEG to urea was 75%.
Abstract: The silk fabric was grafted with acrylamide monomer by the radiation of 60Co- ray and subsequently treated with the chitosan solution in aqueous citric acid. The effects of radiation dose, acrylamide monomer concentration and pH value on the grafting yield were investigated, respectively, and the maximum grafting yield was about 14% (w/w). Scanning electron microscopy photographs indicated that the surface of silk fabric was changed after acrylamide monomer and chitosan treatment. Infrared spectra analysis showed that the acrylamide monomer grafted into silk fabric after the 60Co- radiation, furthermore the chitosan combined with silk fabric through the esterifying reaction between citric acid and silk fiber. The crystallinity of the silk fiber grafted with acrylamide monomer enhanced by the analysis of X-ray diffractograms. With the acrylamide monomer grafting after the 60Co- radiation and the chitosan solution in citric acid treating, the wrinkle recovery angle of the treated silk fabric increased about 34.4% than the untreated silk fabric, the breaking strength percentage of the treated silk fabric decreased slightly. Meanwhile, the ratios of both anti-E.coli and anti-Stap.aureus for silk fabric treated by chitosan were over 93%, and the ratio of anti-C.albicans for silk fabric after chitosan treatment was about 77.6%. The properties of anti-wrinkle and anti-bacterium on silk fabric after the above functional finishing increase significantly, which is very helpful for the health of human beings.
Abstract: In this paper，dyeing process of plant indigo dye was studied, determining the optimum conditions of dyeing the silk with plant indigo. Based on the characteristics of ultrasonic, dyeing with the aid of ultrasonic was discussed. The results showed that higher K/S value can be achieved at lower temperatures so as to reduce the dyeing temperature, save energy and enhance the dye uptake.
Abstract: The hydroxyl in polysaccharide and flavones that extracted from Artemisia argyi can absorb onto the surface of silver nanoparticles and prevent aggregation from nanoparticles. The stable nano-silver solution was got. The preparation of Nano-silver Artemisia Argyi by Artemisia Argyi extract in alkaline and acidic environment was investigated, and the antibacterial property of fabric finished by the nano-silver Artemisia Argyi was analyzed. The experimental results show that the silver nanoparticles prepared in alkaline environment has small size with the minimum 12nm and uniform dispersion. The fabric finished by Nano-silver Artemisia Argyi exhibited strong antibacterial activity against E.coli and S.aureus, the sterilized rate was over 99.9%. The fabric has excellent antibacterial washability too.
Abstract: Reactive dyes have been widely used in the dyeing of bright colourful silk fabrics. The discoloration and degradation of Reactive Red K-2G in waste water were discussed in this paper. A new heterogeneous photocatalyst named loading phthalocyanine sulfonic iron fibers (FePcS-F) was prepared by phthalocyanine sulfonic Iron supported by modified cellulose fibers in acidic condition. The photocatalytic degradation of Reactive Red K-2G was characterized by discoloration rate to evaluate the effect of catalyst dosage, catalyst loading (CFePcS-F) and solution pH. The results proved that increasing catalyst dosage and CFePcS-F significantly accelerated the dye degradation. FePcS-F catalyst showed higher photocatalytic activity when the solution’s pH value is equal to or less than 6.0, compared to alkaline medium.
Abstract: In this study, a temporarily solubilised disperse dye was prepared and applied to polyurethane/silk blend to probe a new dyeing technology. The effect of pH on the dyeing of this blend at different dyeing temperatures was investigated. The optimum dyeing condition was found to be 75 °C and pH 8 at which the dyeing rate curves for two components in blend was measured respectively. Because of difference in substantivity, the transfer of dye from polyurethane fiber to silk occurred during dyeing of the blend. the dyeing equilibrium was nearly achieved by increasing the dyeing time to 80 min. Even distribution of dye between polyurethane and silk, higher exhaustion on polyurethane fiber or fixation on silk as well as desirable fastness properties were obtained with this dye.