With the increasing awareness of environmental protection, the demand for eco-friendly bio-derived flame-retardant for textiles has received increasing attention. In this work, a fully bio-derived phosphorylated furan-based flame retardant (FAP) was synthesized by the Schiff reaction of furan-based compounds (furfural and furfurylamine). To evaluate the application scope and flame retardant efficiency of FAP, cotton fabrics and PLA nonwovens were selected as biomass-based representatives of natural fiber materials and synthetic fiber materials, respectively. Significantly, based on the composition of furan ring, phosphorus and nitrogen containing components of FAP, excellent charring and flame retardant properties of coated cotton fabrics and PLA nonwovens can be expected. TGA results showed that the residual char of C-FAP-3 and P-FAP-3 were 39.7% (increased by 267.6%) and 16.7% (increased by 215.1%), respectively, higher than those of control cotton (10.8%) and PLA nonwoven (5.3%). Cone test results exhibited that the peak heat release rate (PHRR) and total heat release (THR) values of C-FAP-3 were sharply decreased by 69.4% and 37.8%, respectively. P-FAP-3 also displayed a significant reduction in PHRR, implying high flame retardancy of C-FAP-3 and P-FAP-3. Notably, through the weight gains of FAP coating on cotton and PLA as well as the final LOI and VBT results of the flame retardant treated fabrics, it can be preliminarily inferred that control cotton fabrics are more likely to achieve better flame retardant effects than PLA. Additionally, the facile synthetic strategy of fully bio-derived flame retardants is expected to promote the development of green flame retardant strategies for high-performance textiles.
Bio-based flame retardants are of great significance for ecological environments, sustainable development and human health. Herein, a novel DOPO-based furan-containing flame retardant (FAD) was successfully prepared by DOPO and bio-based compounds (furfural and furfurylamine) via the Schiff base-addition reaction. Subsequently, flame-retardant nonwoven materials with excellent thermal stability, flame retardancy, and carbonization performance were obtained by solution blow spinning technology. The thermal stability and flame-retardant property of the original PLA nonwoven material and the flame-retardant PLA nonwoven materials were analyzed by TGA, LOI, UL-94 flammability tests, and cone calorimetry. Compared to the original PLA nonwoven material, the flame-retardant nonwoven materials showed significantly improved flame-retardant properties. When the addition amount of the flame retardant FAD was 10% (P-FAD-10), the LOI of P-FAD-10 significantly reached 31%, and the peak heat release rate (PHRR) and total heat release (THR) decreased by 14.9% and 21.4%, respectively, compared to the original PLA nonwoven material. Additionally, P-FAD-10 passed the UL-94 V-0 rating with better anti-dripping. This novel P and N-containing bio-based flame retardant FAD and its flame-retardant PLA nonwoven material provide a green and efficient solution for developing high-performance, bio-based flame-retardant nonwoven materials.
危险品化学品经营许可证（带存储）