Abstract: With science and living standards progress, functional textile products become more and more popular. The natural and no added finishing method is especially pursuited by people. In this paper, we report on the use of extract from cactus to synthesize the silver nanoparticles. The particle sizes about 30nm were prepared under the unpolluted environment. The basic raw material is natural selection, preparation method is simple, non-polluting, eco-friendly and to address the reliability of a better way. Natural fabrics treated with natural plant , not only improve the added value of the product ,but also achieve natural of the fabric, meet the requirements of the modern people. This research product the cactus silver nanoparticles silk fabric, demonstrated that the cactus solution can fix the nano-silver uniform on the surface of the silk fabric. Compare with the result of the physical performance and wearability of this fabric, the mechanical properties of the fabric is decline, but the degree of the decline is not high, the moisturizing properties of the finished silk fabric are increased. The result revealed the tensile properties remained basically unchanged, the smoothness, the even and orderly is decline, the roughness of the surface is increased, the softness is weakened, the bulkiness is reduce, the fullness is weakened, the wrinkle recovery capabilities is improved.
Abstract: In order to take the advantage of the specific property of sericin to improve wear property of cotton fabric, cotton fabric was finished with sericin. Sericin was fixed onto the surface of cotton fabric in the presence of poly-carboxylic acids (CA and BTCA) at high temperature using a pad-dry-cure process. The effects of catalyst concentration, pH value, curing temperature and curing time on the finish were investigated. The optimized finishing conditions for cotton fabric were obtained. The weight gain of treated fabric with BTCA as crosslinking agent was higher than CA. The whiteness, breaking strength, moisture regain, permeability to gas and crease recovery properties of treated fabrics were measured. The results showed that wrinkle recovery angle evidently increased, and the wrinkle recover angle of BTCA combined secrin treated fabric was higher than CA. The breaking strength, moisture regain and whiteness of the treated fabric slightly decreased, the permeability to gas of cotton fabrics were not changed.
Abstract: In order to develop the traditional technique and variety colors of Xiangyunsha, Doscorea Cirrhosa extract was applied on silk fabric, and three metal ion agents Fe2+, Zn2+ and Ti4+ were used as post treatment mordant. Different silk fabrics with three colors were obtained: black, pale yellow and orange yellow. And metal salt post treatment also increased the color fastness of finished fabric. The optimal technological conditions were achieved through orthogonal experiments. The washing fastness of three metal salts treated fabrics was measured. The staining fastness was good, but the fading fastness was medium. Among of the three mordants treated fabrics, the washing fastness of Zn2+ post treated fabric was the best. Crocking fastness and sunlight fastness of Doscorea Cirrhosa treated silk fabric could be improved by metal salt treatment. The UV-resistant property of silk fabric was improved to an encouraging level, which benefited the silk cloth especially because silk was commonly applied for summer wear. And the gas permeability of treated sample was acceptable.
Abstract: In this paper, a hydroxyl-functional organophosphorus oligomer (HFPO) was introduced as a formaldehyde-free flame retardant into silk fabric, using 1, 2, 3, 4-butanetetracarboxylic acid (BTCA) as crosslinking agent. But HFPO bonded onto silk fabric is not theoretically increased with the increase of BTCA concentration. Triethanolamine (TEA) was applied to improve the HFPO fixation onto silk fabric. The paper still evaluated the flammability and physical properties of the silk fabric treated with HFPO/BTCA/TEA system. The treated silk fabric demonstrated a high level of flame retardancy with modest loss in fabric tensile strength. Microscale combustion calorimetry(MCC) testing results indicated that HFPO/BTCA/TEA system treated silk fabric has much lower heat release rate than that of control fabric.
Abstract: The chief aim of the present work is to investigate the preparation for silver nanoparticles antimicrobial agent and its antibacterial activity on cotton fabric. In this study, antimicrobial agent was fabricated by a reaction between an amino-terminated hyperbranched polymer (HBP-NH2) and silver nitrate solution of certain concentration. Meanwhile, cotton fabric was oxygenated to afford aldehyde groups which could connect with the amino groups of the HBP-NH2 to provide cotton fabric with durable antimicrobial properties. The effects of different biocides made of various molecular structures of synthetic material (HBP-NH2) on antimicrobial properties of nano-silver colloid solution were discussed, and three different agents generated then were characterized in following aspects as silver nanoparticles size and distribution by using DLS, TEM and UV-vis. Furthermore, the fabric structure, mechanical properties and antimicrobial property of treated cotton fabric were also tested. Included in this part of experiment were transverse micro morphology of cotton fibre by SEM, fabric strength retention after finishing, silver nanoparticles molecular conformation on fabric and content analysis via ICP-AES. The results showed that stable silver nanoparticles collide solution with 20-30 nano, applied on oxidized cotton fabric under certain condition, could produce ideal antibacterial rate over 94% of bacterial reduction to both Staphylococcus aureus (S.aureus) and Escherichia coli (E.coli) after 50 consecutive washings.
Abstract: Polypropylene fibers were dyed with Disperse dyes Blue 2B in Supercritical Carbon Dioxide at different temperature, pressure and time. The K/S value were determined and the effect of as temperature, pressure and dyeing time on the dyeing behaviours of disperse dyes on Polypropylene fibers were discussed. It was found that with the increase of dyeing temperature and pressure, the K/S value increased gradually, and dyeing effect was best after the fiber was dyed at 120 °C, 28 MPa for 20 min.
Abstract: The surface of polyacrylonitrile fibers and membrane were modified by nitrilase from Escherichia coli BL21 (DE3)/pET-Nit. Escherichia coli BL21(DE3)/pET-Nit was able to convert nitrile groups on PAN fibers and membrane to corresponding carboxylic acid as indicated by X-ray photoelectron spectroscopy (XPS). An increase of O/C atomic ratio on the fiber and membrane surface showed an increase in hydrophilicity and fabric-dyeing efficiency. Strength of treated fiber decreased by only 1.17%, because only surfacial nitrile groups of acrylic fibers were hydrolyzed by E.coli BL21(DE3)/pET-Nit.
Abstract: In this article, tussah silk was treated with 3, 4- dihydroxy benzaldehyde solution under concentrated nitric acid conditions, and its coloration characteristic was discussed, including the effects of concentrations, temperature and time on the coloration, finally the property of the treated fiber was tested. As the results showed, the treated tussah silk was in bright yellow, and both of its color fastness to washing and rubbing achieved 4 grade or above. The optimum process was that concentrations of 3, 4- dihydroxy benzaldehyde and concentrated nitric acid were 1.5% and 3% respectively, reacting temperature was 70 °C, reacting time was 10min and bath ratio was 1:25.
Abstract: A study has been conducted into the dyeing of silk fabric in supercritical carbon dioxide. In order to reach better dyeing effect, plasma modifying is used to silk. Plasma modifying can decompose disulfide bond of the protein fiber, change the state of scale layer and break silk gum of fiber so that dyestuff could infiltrate. Factors of plasma modifying are fixed, including pH value, processing time. And they affect the values of fabric colour feature and fabric strength. In this work, C.I. Disperse Blue-77 and C.I. Disperse Yellow E-3G are used by combining orthogonal experiment and single factor analysis. During dyeing process, temperature and pressure have a great impact on the result. Modification process and dyeing process are optimized, and the best process is determined. The results presented in this study show dyestuff can infiltrate through modified fabric easily. Through the testing, the washing fastness and rubbing fastness of silk fabric after being modified are improved. The changes between before and after dyeing are analyzed by scanning electron microscope and infrared spectrometer. It is showed that modified fabric obtains a better effect.
Abstract: To increase the color spectra, two kinds of vegetable dyes of natural indigo and brazilwood were selected for the complex dyeing of Antheraea pernyi (A. pernyi) silk fabric. Based on the structures of the two vegetable dyes, the mechanism of molecule reaction and the principle of the complex dyeing were analysized. The dyeing process was performed on the silk samples with natural indigo before brazilwood, and the optimum dyeing technique was determined by single factor. Based on K/S (color strength), a and b values (index for color style), the effects of the amount of brazilwood, pH value and temperature on the index for color style were discussed. The results showed that the dyeing shade was affected greatly by the concentration of brazilwood, and a series colors including green and grey could be obtained by the dyeing process. It was also found that the complex dyeing process provided A. pernyi silk fabric with the similar rubbing fastness and washing fastness of more than 3 or equal 3.