Chemical recycling of hemp waste textiles via the ionic liquid based dry-jet-wet spinning technology

The chemical recycling of hemp fabric into high-tenacity man-made cellulose fibers was demonstrated. laundered 25 and 50 times to mimic the wear cycles post-consumer textile waste. Despite launderings, molar mass material still too high for via dry-jet-wet spinning. Thus, fabrics were treated with an aqueous sulfuric acid solution adjust intrinsic viscosity targeted level 400–500 ml/g. hydrolyzed sample dissolved in 1,5-diazabicyclo[4.3.0]non-5-enium acetate regenerated by properties determined tensile testing, birefringence measurements, X-ray diffraction. Regenerated spun yarn knitted a fabric. abrasion pilling resistance determined. showed higher modulus toughness (55.9 MPa) compared (28.7 MPa). fineness staple length uniformity resulted structure evenness, tenacity 28.1 cN/tex, elongation at break 7.5%. Due even structure, from than