Synthetic dyes in the aqueous media have been commonly used for textile dyeing, resulting in resource and environmental pressure arising from consumption of water and environmentally unfriendly chemicals. In this stud...Synthetic dyes in the aqueous media have been commonly used for textile dyeing, resulting in resource and environmental pressure arising from consumption of water and environmentally unfriendly chemicals. In this study, an eco-friendly process of dyeing polyamide 6, 6(PA66) fabrics with natural Monascus pigments in decamethylcyclopentasiloxane(D5) solvent has been developed to minimize water consumption and effluent generation. The influence of processing parameters including dyeing temperature, dyebath pH and dyeing time on dyeing effects was explored. It was shown that color strength and color fastness of the samples dyed in D5 media were higher than those of the samples dyed in the aqueous media. Moreover, PA66 fabrics exhibited the highest color strength, good color fastness and a bacteriostatic rate of 53.6% against Staphylococcus aureus when it was dyed at pH of 3.5 and temperature of 80 ℃ for 30 min.展开更多
Melt-dripping is always a big chanllenge in flame retardant finishing of synthetic fabrics. In this work, vinyltrimethoxysilane（VTMS） was introduced onto the polyamide66（PA66） surface by microwave grafting to impr...Melt-dripping is always a big chanllenge in flame retardant finishing of synthetic fabrics. In this work, vinyltrimethoxysilane（VTMS） was introduced onto the polyamide66（PA66） surface by microwave grafting to improve the fire performance. The chemical structure of the grafted fabric was characterized by attenuated total reflection Fourier transformation infrared spectroscopy（ATR-FTIR） and X-ray photoelectron spectroscopy（XPS）. The thermal stability analysis and flammability evaluation of the grafted samples by thermogravimetric analysis（TGA）, cone calorimetry, vertical burning tests and limiting oxygen index（LOI） demonstrate that the presence of grafting chains significantly reduces the dripping tendency and decreases the heat release rate of polyamide66（PA66） fabric. The surface morphology observed by scanning electron microscope（SEM） indicates that VTMS can not only promote the formation of protective layers, which prevent the substrate from further thermal degradation, but also promote the char formation ofPA66 substrate during combustion.展开更多
基金Fujian Provincial Department of Education,China(No.JAT190528)Quanzhou Science and Technology Project,China(No.2019C014R)。
文摘Synthetic dyes in the aqueous media have been commonly used for textile dyeing, resulting in resource and environmental pressure arising from consumption of water and environmentally unfriendly chemicals. In this study, an eco-friendly process of dyeing polyamide 6, 6(PA66) fabrics with natural Monascus pigments in decamethylcyclopentasiloxane(D5) solvent has been developed to minimize water consumption and effluent generation. The influence of processing parameters including dyeing temperature, dyebath pH and dyeing time on dyeing effects was explored. It was shown that color strength and color fastness of the samples dyed in D5 media were higher than those of the samples dyed in the aqueous media. Moreover, PA66 fabrics exhibited the highest color strength, good color fastness and a bacteriostatic rate of 53.6% against Staphylococcus aureus when it was dyed at pH of 3.5 and temperature of 80 ℃ for 30 min.
基金Supported by the National Natural Science Foundation of China（Nos.21374004, 21674008）.
文摘Melt-dripping is always a big chanllenge in flame retardant finishing of synthetic fabrics. In this work, vinyltrimethoxysilane（VTMS） was introduced onto the polyamide66（PA66） surface by microwave grafting to improve the fire performance. The chemical structure of the grafted fabric was characterized by attenuated total reflection Fourier transformation infrared spectroscopy（ATR-FTIR） and X-ray photoelectron spectroscopy（XPS）. The thermal stability analysis and flammability evaluation of the grafted samples by thermogravimetric analysis（TGA）, cone calorimetry, vertical burning tests and limiting oxygen index（LOI） demonstrate that the presence of grafting chains significantly reduces the dripping tendency and decreases the heat release rate of polyamide66（PA66） fabric. The surface morphology observed by scanning electron microscope（SEM） indicates that VTMS can not only promote the formation of protective layers, which prevent the substrate from further thermal degradation, but also promote the char formation ofPA66 substrate during combustion.
