Simultaneous enhancement of mechanical strength and flame retardancy of lyocell fiber via filling fire-resistant cellulose-based derivative

Zhang, Qiuyan; Chen, Jie; Li, Di; Sun, Ling; Ren, Yuanlin; Cheng, Chuanbing; Liu, Xiaohui

doi:10.1016/j.indcrop.2023.116757

Cited by 17 publications

(1 citation statement)

References 44 publications

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“…However, due to its easy combustion and thermal degradation characteristics, it has greatly limited its application. Hence, the development of cellulose films with excellent thermal stability and flame retardant effects is crucial for enhancing safety performance. − This study utilized two types of cellulose fibers (CF), namely, needle cellulose fiber (NCF) and broadleaf cellulose fiber (BCF), to prepare flame-retardant composite films. The molecular weights of these two materials are different, but the reaction principle in this experiment is not intrinsically different.…”

Section: Introductionmentioning

confidence: 99%

Flame-Retardant and Degradable Cellulose Micro/Nanofiber Films for Packaging Materials

Dong,

Geng,

Liu

et al. 2024

ACS Appl. Nano Mater.

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Cellulose, as the main structural component of plant cell walls, has gained widespread applications in many highend fields due to its outstanding physicochemical properties, such as renewability and biodegradability. To reduce reliance on virgin petro-based materials and construct sustainable, high-performance biobased structural materials, biodegradable cellulose materials have emerged as a crucial Frontier in research. However, its poor fire-resistant property strongly limits the practical application of cellulosics in many fields. Here, we design a biodegradable biobased composite film with a three-dimensional network structure by introducing alginate and calcium ions into cellulose micro-and nanofibers. Specially, sodium alginate is introduced into the network of the composite film and subsequently by crosslinking with calcium ions to enhance the flame retardancy of cellulose fibers film and improve the structural integrity of the film. As a result, the limiting oxygen index of NCF/SA-Ca reached 38%, with a reduction of 72.3% in the peak heat release rate. The limiting oxygen index of BCF/SA-Ca reached 35%, with a reduction of 66.6% in peak heat release rate. Furthermore, both materials exhibited a higher residual char in thermogravimetric analysis, indicating excellent flame-retardant properties. Therefore, this flame-retardant and biodegradable cellulose composite film can replace traditional membrane materials and gain wider applications in practical life, such as flame-retardant packaging materials.

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Section: Introductionmentioning

confidence: 99%

Flame-Retardant and Degradable Cellulose Micro/Nanofiber Films for Packaging Materials

Dong,

Geng,

Liu

et al. 2024

ACS Appl. Nano Mater.

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Anti‐solvent method synthesized phosphorylated microcapsules with flame retardancy and self‐healing analysis

Li,

Meng,

Song

et al. 2024

J of Applied Polymer Sci

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In this study, an anti‐solvent method is employed to encapsulate linseed oil (LO) into phosphorylated ethyl cellulose (P‐EC), successfully preparing microcapsules (LO@P‐EC). Scanning electron microscopy and Fourier transform infrared spectroscopy experimental results indicate the introduction of phosphoric groups into P‐EC, and the successful encapsulation of LO within the microcapsules, which are spherical with an average diameter of 145 μm. Hartmann tests reveal that the introduction of phosphate groups reduces the microcapsule flame propagation height by 43.75% and the average flame propagation speed by 55.67%. Thermodynamic analyses based on the Coats‐Redfern equation are performed to determine the changes in activation energy during thermal degradation. Furthermore, fitting analysis shows that the apparent activation energy of microcapsules with shell material of P‐EC significantly increases, confirming the evident thermodynamic inhibition of microcapsule deflagration by P‐EC. This is mainly attributed to the formation of a char structure by the P‐EC shell during combustion, which hinders the progress of the combustion reaction. When immersed in 3.5 wt% NaCl corrosive solution for 15 days, the microcapsule‐filled epoxy resin (LO@P‐EC/EP) coating exhibits excellent corrosion resistance, which is mainly attributed to the excellent self‐healing properties of the microcapsule core LO.

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

Bai,

Peng,

Nie

et al. 2024

Polymer Engineering & Sci

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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.

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Simultaneous enhancement of mechanical strength and flame retardancy of lyocell fiber via filling fire-resistant cellulose-based derivative

Cited by 17 publications

References 44 publications

Flame-Retardant and Degradable Cellulose Micro/Nanofiber Films for Packaging Materials

Flame-Retardant and Degradable Cellulose Micro/Nanofiber Films for Packaging Materials

Anti‐solvent method synthesized phosphorylated microcapsules with flame retardancy and self‐healing analysis

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

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