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RISS 인기검색어
- 검색키워드
- 저자 : Asta Skocir (검색결과 2 건)
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Thermochemical degradation of cotton fabric under mild conditions
Michael Cuiffo,정혜정,Asta Skocir,Theanne Schiros,Emily Evans,Elizabeth Orlando,Yu-Chung Lin,Yiwei Fang,Miriam Rafailovich,Taejin Kim,Gary Halada 한국의류학회 2021 Fashion and Textiles Vol.8 No.1
Textile waste presents a major burden on the environment, contributing to climate change and chemical pollution as toxic dyes and finishing chemicals enter the environment through landfill leachate. Moreover, the majority of textile waste reaching landfills is discarded clothing, which could be reused or recycled. Here we investigate environmentally benign morphology changing of cotton textiles as a precursor for reintegration into a circular materials economy. At 50 °C using low concentrations of acids and bases, the interfiber structures of woven cotton were successfully degraded when treated with the following sequence of chemical treatment: citric acid, urea, sodium hydroxide, ammonium hydroxide, and sodium nitrate. Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) reveal separation of the constituent fibers without depolymerization of the cellulose structure, and streaming potential measurements indicate that surface charge effects play a key role in facilitating degradation. The proposed reaction procedures show feasibility of effective waste-fabric recycling processes without chemically intensive processes, in which staple fibers are recovered and can be re-spun into new textiles.
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Muslin Deweaving through Combined Mechanical, Thermal and Chemical Methods
Hang Zhang Cao,Jamie DeCoster,Jamie DeCoster,Kelvin Linskens,Kareem Mehdi,Yizhi Meng,Gary Halada,Hye-Jung Jung,Theanne Schiros,Asta Skocir,Taejin Kim 한국섬유공학회 2022 Fibers and polymers Vol.23 No.11
Fabric waste has become an escalating problem that stems from the ever-shortening clothing lifecycle. Previouscotton recycling processes used mechanical methods to break the cotton down into fiber; this comes at the cost ofcompromised strength. Sodium hydroxide has long been used in the textile industry to increase dye absorption and lusterthrough mercerization. In this paper, the deweaving of cotton muslin fabric was attempted using the chemical interactions ofNaOH in combination with heat and mechanical forces through agitation. Different NaOH concentrations were tested todetermine the optimum condition for fabric decomposition on a laboratory scale. Overall, the muslin fabric treatment with0.5 M NaOH yielded the most promising results for fiber quality retention and chemical usage. The NaOH solution wasshown to be feasible in effectively deweaving multiple muslin fabrics consecutively. While the deweaving process reducesthe mechanical strength of the fabric, overall, the recycling method was successful in minimizing chemical waste anddeweaving time.
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