Recent progress in regenerated fibers for “green” textile products

Engineering strong man-made cellulosic fibers: a review of the wet spinning process based on cellulose nanofibrils

“…Moreover, harsh solvents are needed to dissolve cellulose (NaOH and CS 2 for viscose and NMMO hydrate for Lyocell) which causes environmental concerns. 24 Under the scheme of making man-made fibers using sustainable resources, CNFs have become an emerging building block. 25,26 As discussed before, CNFs are the structural fundamental building blocks of plant fibers.…”

“…Moreover, harsh solvents are needed to dissolve cellulose (NaOH and CS 2 for viscose and NMMO hydrate for Lyocell) which causes environmental concerns. 24…”

Nanocellulose-Based Hollow Fibers for Advanced Water and Moisture Management

“…10,11 The use of harsh solvents, e.g., NaOH and CS 2 for viscose and NMMO hydrate for lyocell, is also an issue. 7,8,12 As the basic building blocks for fiber cell wall structure, cellulose nanofibrils (CNFs) could be produced by dissem-bling the plant fibers and possess tremendous advantages including high aspect ratio (width <10 nm and length >500 nm), high crystallinity, and high mechanical properties (modulus up to 140 GPa for the crystalline part). 13−15 Inspired by the preparation of conventional regenerated cellulose fibers, CNFs can also be assembled into macro solid fibers by wet-spinning.…”

“…Besides the soft touch and good mechanical properties, plant fibers especially cotton have been widely used in the clothing industry because of their high wettability, mainly attributed to the hollow structure (lumen of the plant cell) and hygroscopicity of cellulose. − However, limited length and diameter, natural defects, and variations among individuals make the plant fiber hard to compete against synthetic fibers. , Regenerated cellulosic fibers such as viscose and lyocell have been developed to address these challenges, which involves a complete dissolving of cellulose molecules and then assembling into fibers through a wet-spinning process to tailor the fiber structure. − However, the crystalline cellulose I part in the fibers is destroyed substantially after the dissolution, which significantly compromises the mechanical properties . The regenerated cellulose fibers are also often made in a solid form without the inner open channel (lumen structure for plant fiber cells), leading to a drastic decrease in wettability compared to cotton fibers. , The use of harsh solvents, e.g., NaOH and CS 2 for viscose and NMMO hydrate for lyocell, is also an issue. ,, …”

Recent Progress in Regenerated Cellulose Fibers by Wet Spinning

“…On the other hand, demand for environment‐friendly or “green” renewable fibers showed an increase rather than decrease. [ 11 ] Regenerated cellulose fibers (RCFs) helped to overcome the limitations of synthetic fibers and retain the advantages of natural (cotton) fibers. [ 12 ] According to the search results from the web of science, the number of relevant papers published between 2010 and 2022 clearly demonstrates that the research and developments in the field of RCF preparation by wet spinning have progressively increased ( Figure a).…”