Green biobased P‐N coating: Towards waste‐minimization flame retardant flexible polyurethane foam

Abstract

The increasing consumption of flexible polyurethane foam (FPUF) has caused two significant threats: fire hazards and environmental pollution. More seriously, while waste FPUFs can cause pollution, using many flame retardants also results in significant environmental hazards. Here, the novel process to realize the full lifecycle sustainable utilization of flame retardant FPUF was proposed. First, the biobased P‐N coating (LFPN) was green synthesized by mechanochemistry, and the FPUF was finished by polyelectrolyte‐assisted deposition technology. The fire performance index of FPUF was improved by 110.6% after being treated via LFPN. Moreover, the compression resistance of FPUF was enhanced without affecting the resilience. In order to extend the service life for FPUF, FPUF@LFPN can be reused as a sewage treatment material to remove metal pollution from water. Ultimately, the FPUF@LFPN absorbed metals can be converted into high‐value products such as metal oxide/carbon composites through the metal catalytic pyrolysis technique. This process can effectively reduce the fire and environmental hazards caused by FPUF and may provide an innovative train of thought for the green and sustainable use of other porous polymer materials.

Preparation and properties of flame retardant biobased polyamide elastomer with shape memory

“…The FT‐IR spectra of IAHD‐NH 2 contained three distinct contributions: NH 2 groups at 3440 cm −1 , CO groups at 1646 cm −1 and NH groups at 1626 cm −1 , the latter two of which demonstrated the formation of amide bonds in polyamides. Moreover, the peak at 2260 and 1680 cm −1 showed the formation of NCO groups 33 . Meanwhile, the infrared peak at 3440 cm −1 disappeared, indicating that the reaction between the terminal amino group and the isocyanate group was complete.…”

“…Moreover, the peak at 2260 and 1680 cm À1 showed the formation of NCO groups. 33 Meanwhile, the infrared peak at 3440 cm À1 disappeared, indicating that the reaction between the terminal amino group and the isocyanate group was complete. It preliminarily confirmed the IAHD-NCO was successfully obtained.…”

Recent Developments in Biobased Foams and Foam Composites for Construction Applications

“…This was attributed to the phytic acid decomposing to produce phosphoric acid and polyphosphate that promotes a dense 3D char layer on the foam surface. Piao et al [99] used phosphorus nitrogen functionalized lignocellulosic green flame retardants. With the flame retardant, the foam exhibited an LOI of 25.4 % as compared to that of 18.4 % by the neat PUF.…”

“…Piao et al. 99 used phosphorus nitrogen functionalized lignocellulosic green flame retardants. With the flame retardant, the foam exhibited an LOI of 25.4 % as compared to that of 18.4 % by the neat PUF.…”

Self‐healing polyurethane based on a substance supplement and dynamic chemistry: Repair mechanisms and applications

“…In recent years, researchers have made numerous attempts to extend the service life of PU materials, including surface coating, 9,10 environmental optimization, 11 and addition of stabilizers. 12,13 While these methods can have some effect, they are usually cumbersome to operate and do not fully utilize the advantages of the strong, adjustable internal structure.…”