부산대학교 도서관

Lyocell fiber, hailed as the 'verdant filament of the 21st century,' boasts elevated tensile strength, environmentally conscientious production practices, and innate biodegradability. Nonetheless, its intrinsic combustibility constitutes a noteworthy impediment to its pervasive utilization across textile and industrial domains. In a concerted effort to surmount this challenge, ammonium polyphosphate (APP) underwent modification through the infusion of N-methylmorpholine-N-oxide (NMMO) molecules, amplifying its dispersibility within lyocell solutions. The resultant NMMO-coated ammonium polyphosphate (NAPP) underwent meticulous characterization of both its structure and properties. Remarkably, lyocell fiber impregnated with 30% NAPP exhibited exemplary flame retardancy, enduring through 30 laundering cycles. Notably, its tensile strength remained notably robust at 139 MPa, demonstrating a mere 6.1% reduction in comparison to its pristine lyocell counterpart. This study delineates a promising trajectory for the fabrication of mechanically resilient lyocell fibers endowed with commendable flame-retardant attributes. Highlights * The raw material is waste cotton textiles, prepared on a green basis. * The use of ultrasonic mixing and low-speed stirring defoaming method and the use of room temperature spinning advantage of the production of flame retardant lyocell fiber. * The amount of flame retardant is small, and the mechanical strength is reduced to a lesser extent. * Good flame-retardant effect and excellent water washing resistance. KEYWORDS ammonium polyphosphate, cellulose, flame retardant, lyocell fiber, NMMO
1 | INTRODUCTION 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 [...]