Smoldering suppression and synergistic effect of alginate fiber‐based composite paper by flame‐retardant lyocell fiber

Abstract

The application of traditional cellulosic paper is limited because of its flammability, so it is necessary to explore new materials that can be used in the field of flame-retardant paper. Based on the synergistic effect between fibers, flameretardant lyocell (FRL) and calcium alginate (FRL/Ca-Alg) composite paper is prepared by a simple but efficient method. The thermal degradation process of the composite paper is analyzed by thermogravimetric (TG) and TG analysis coupled with Fourier transform infrared, the flame retardancy of the composite paper is analyzed by vertical flammability (VF) tests, limiting oxygen index test and cone calorimetry test, and the morphology of the residue after VF tests is observed by scanning electron microscopy. It is found that, the Ca-Alg releases a large amount of CO 2 before ignited, which delayed the ignited time of the composite paper; FRL reduces the effective combustion heat of composite paper during combustion, and the compact char formed by FRL effectively inhibits the smoldering of Ca-Alg in the end stage of combustion. Based on these, the synergistic flame-retardant effect of composite paper is proposed.

Nacre-Inspired Aramid Nanofibers/Basalt Fibers Composite Paper with Excellent Flame Retardance and Thermal Stability by Constructing an Organic–Inorganic Fiber Alternating Layered Structure

“…The larger the FGI value, the greater the fire risk of the material. As shown in Figure f, the ANFs/BF-50 paper prepared delivers a lower FGI value in comparison to different types of flame-retardant paper in previous reports, ,,− indicating its higher fire safety.…”

“…As non-renewable resources, like fossil fuels, gradually run out, new forms of energy, like solar and wind power, have continuously produced and advanced toward electrification and a series of fire safety issues have emerged. Therefore, various fields have put forward higher requirements for the flame retardancy of materials in their thermal protection systems. − The flame-retardant paper has great potential in the field of power electronics as a result of its excellent processability, flexibility, adhesion, and excellent flame retardancy. − However, traditional cellulose-based flame-retardant paper requires the addition of a large number of flame retardants, which has an adverse impact on the environment and the mechanical properties of the materials. − In recent years, inorganic fibers have been widely used in the field of flame retardancy as a result of their inherent flame retardancy, but their paper strength is relatively low. , Therefore, it is necessary to develop green and environmentally friendly inorganic fiber composite paper with excellent mechanical properties, flame retardancy, and thermal stability.…”

Catalytic effect of metal ions on flame‐retardant cellulose paper with montmorillonite through layer‐by‐layer self‐assembly

“…Cellulose paper is a widely used environmentally friendly and renewable “green” material with the advantages of low cost, lightweight and biodegradability 1–3 . However, natural cellulose paper is very easy to burn, which often brings serious hidden dangers and threats to personal safety and properties, so its flame‐retardant modification is particularly important 4–8 . One of the currently implemented methods for effective flame retardancy paper is the cellulose fiber flame retardant modification method 9–13 .…”

Enhanced flame retardant performance of poly(vinyl alcohol) composites based on phosphorus–metal ion synergistic effect

“…This has been frequently overcome by the incorporation of flame retardants (halogenated compounds, inorganic compounds, and phosphorus compounds) into PVA composites. 6 In spite of the notable success that has been achieved for flame retardancy, it remains challenging to achieve a remarkable flame retardant PVA with less fire-retardant content and original mechanical properties.…”