Research on fire retardant lignin phenolic carbon foam with preferable smoke suppression performance.

[Display omitted] • The carbon foam with great smoke inhibition was prepared by modified lignin. • The total smoke release of carbon foam decreased by 80.91%∼98.12% at most. • Modified lignin reduced the use of raw material phenol by 30 wt%. In this work, a lignin phenolic carbon foam (LCF) with preferable smoke suppression performance was fabricated by substitute 10 wt.% and 30 wt.% phenol with modified lignin in the traditional process. The result showed that the LCF 600 s (LCFs carbonized at 600℃) with different lignin percentages showed better smoke suppression performance than the traditional phenolic carbon foam (CF 600). The peak smoke production rate (pSPR) and total smoke release (TSR) of LCF 600 s decreased by 6.90%∼48.28% and 80.91%∼96.28%, and the peak CO production rate and CO yield decreased by 41.17%∼70.59% and 53.80%∼77.79%, respectively. Besides, LCF 1-10-600 and LCF 2-30-600 displayed the best smoke suppression performance (0020, 0.0015 m2/s of pSPR and 0.61, 2.76 m2/m2 of TSR, respectively). Since the introduced modified lignin significantly increased the amount of benzene rings in the forms, the degree of graphitization of the resulted carbon foams greatly improved, leading to better smoke suppression performance. Furthermore, the added lignin facilitated the preservation of the carbon layer, resulting in reducing smoke production consequently. [ABSTRACT FROM AUTHOR]