Poly(lactic acid) (PLA) is considered the best candidate biobased material alternative to petroleum-based polyethylene terephthalate due to its renewability and biodegradability. However, the crucial dyeing issue of PLA filament limits its applications in the textile industry. Herein, a green deep eutectic solvent (DES) consisting of choline chloride and oxalic acid was employed for the surface reconstruction of the PLA filament. Owing to the synergistic contribution effect of physical etching and chemical modification from the DES, the surface roughness and chemical activity of the PLA filament improved significantly, thereby conferring potent low-temperature dyeing performances. The DESmodified PLA filament can achieve K/S value and dye uptake at 90 °C commensurate to those of the PLA filament at 110 °C with no decay on the dry and wet rubbing fastness. This work demonstrates a promising approach for the low-temperature dyeing of PLA filaments, enabling the practical applications of PLA filaments.
Feather and down textiles are widely used in our daily life, especially in winter. However, they are easily drilled out from the fabric body and are difficult to machine-wash, which thereby blocks their widespread application. In order to solve these issues, a highly anti-drilling, breathable and machine-washable ePTFE-aided down-proof cotton fabric was prepared in this work, which was done by modifying a plain-weave cotton fabric with expanded polytetrafluoroethylene (ePTFE) nanofiber membrane via point glue method. The fabrication procedure is simple, scalable and environmentally friendly, which is a prerequisite for large-scale production. The effects of tumble and washing cycles on pore size distribution and the corresponding anti-drilling behavior of the prepared down-proof fabric were systematically investigated. Furthermore, the machine washability, air permeability, thermal insulation and tensile properties of the fabric were studied. The results demonstrated that less than five drilled files escaped from the fabric surface, irrespective of tumble and/or laundering cycles, and it also has the advantages of being lightweight (<83 g/m2), having high breathability, a good thermal insulation rate (≈80%) and can be washed with surfactant by a laundry machine without explosion. Benefiting from the above characteristics, the as-prepared ePTFE-aided down-proof cotton fabric presents its potential application in the field of home textiles.
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