PAPERmaking! Vol11 Nr3 2025

E. Pasquier and J. Ruwoldt

Journal of Bioresources and Bioproducts 10 (2025) 325–335

Fig. 1. Pictures of surface of substrates. RH, relative humidity; LNP, lignin nanoparticles.

Fig. 2. Density of substrates after pressing. Reference 10, cellulose substrate without additives with a moisture content of 10 % before pressing; Reference 50, cellulose substrate without additives with a moisture content of 50 % before pressing; PL 10, cellulose substrate with added lignin particles and cationic polymer retention aid (PCB 20) with a moisture content of 10 % before pressing; PL 50, cellulose substrate with added lignin particles and cationic polymer retention aid (PCB 20) with a moisture content of 50 % before pressing; SL 10, cellulose substrate with added lignin particles and cationic starch retention aid with a moisture content of 10 % before pressing; SL 50, cellulose substrate with added lignin particles and cationic starch retention aid with a moisture content of 50 % before pressing; SLNP 10, cellulose substrate with added lignin nanoparticles and cationic starch retention aid with a moisture content of 10 % before pressing; SLNP 50, cellulose substrate with added lignin nanoparticles and cationic starch retention aid with a moisture content of 50 % before pressing.

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