Effects of Glucose and Coagulant on the Structure and Properties of Regenerated Cellulose Fibers

Abstract

Regenerated cellulose fiber (RCF) is an environmentally friendly material with outstanding mechanical properties and recyclability, which has been used in a large number of applications. However, during the spinning process using ionic liquids (ILs) as solvents, the dissolved cellulose continues to degrade and even produces degradation products such as glucose, which can enter the recycled solvent and coagulation bath. The presence of glucose can seriously affect the performance of the produced RCFs and hinder their applications, so it has become critical to clarify the regulation and mechanism of this process. In this study, 1-ethyl-3-methylimidazolium diethyl phosphate ([Emim]DEP) with different glucose contents was selected to dissolve wood pulp cellulose (WPC) and obtained RCFs in different coagulation baths. The effect of glucose content in spinning solution on fiber spinnability was investigated by rheological analysis, and the influence of coagulation bath composition and glucose content on the morphological characteristics and mechanical properties of the RCFs was also studied in depth. The results indicated that the morphology, crystallinity, and orientation factor of RCFs were influenced by the presence of glucose in the spinning solution or coagulation bath, resulting in corresponding changes in mechanical properties, which can provide practical reference and guidance for the industrial production of new type fiber.

Innovations in spider silk‐inspired artificial gel fibers: Methods, properties, strengthening, functionality, and challenges

“…The morphology, orientation factor, and crystallinity were influenced by the spinning solution, coagulation bath, and stretch ratio, leading to alterations in mechanical characteristics and offering valuable guidance and references for the industrial production of novel fiber types. [170][171][172] Furthermore, by adjusting the rolling speed and flow rate, one can easily produce conventional strong fibers, hollow fibers, and even fibers with various knotted morphologies. 173 High-performance synthetic fibers exhibit impressive mechanical properties and have significant potential for impact protection applications.…”

“…Nevertheless, upon exceeding a critical strain threshold, crystallinity index, factor of orientation, and the prolonged gel fibers underwent gradual alterations, marking the point where the structure's ability to evolve smoothly began to transition. The morphology, orientation factor, and crystallinity were influenced by the spinning solution, coagulation bath, and stretch ratio, leading to alterations in mechanical characteristics and offering valuable guidance and references for the industrial production of novel fiber types 170–172 . Furthermore, by adjusting the rolling speed and flow rate, one can easily produce conventional strong fibers, hollow fibers, and even fibers with various knotted morphologies 173 .…”

N‐methylmorpholine‐N‐oxide molecules coated ammonium polyphosphates for dope spinning of flame‐retardant lyocell fiber

“…Regenerated cellulose fiber, such as lyocell, is gaining popularity due to the increasing environmental awareness and the need for sustainable development in line with the dual carbon goal vision. [1][2][3] Lyocell fiber, as a prominent green fiber of the 21st century, offers advantages such as the use of natural and renewable raw materials, clean processing, and biodegradability. Lyocell fabric exhibits excellent properties, including superior moisture absorption, breathability, softness and comfort, making it widely utilized in apparel and household applications.…”

“…Regenerated cellulose fiber, such as lyocell, is gaining popularity due to the increasing environmental awareness and the need for sustainable development in line with the dual carbon goal vision 1–3 . Lyocell fiber, as a prominent green fiber of the 21st century, offers advantages such as the use of natural and renewable raw materials, clean processing, and biodegradability.…”