CNFs from softwood pulp fibers containing hemicellulose and lignin

Abstract The energy demand to produce cellulose nanofibrils, CNFs, is high and additionally the cost of starting material, pulp, substantial as purity dissolving pulp generally used. Pulps aimed for board paper are produced at higher yield they contain hemicelluloses and, in case unbleached lignin, would be a more economical material CNFs. It interest understand how presence hemicellulose lignin affects fibrillation process CNF properties. Kraft cooks softwood were performed well kraft with addition polysulfide increase content. Part pulps bleached remove residual thus making it possible compare without lignin. Higher amount had an obstructive effect on enzymatic pre-treatment whereas no adverse enzyme accessibility. Increased charged groups improved accessibility enzymes. Both carboxymethylated when by carboxymethylation was employed. However, partly dissolved hemicelluloses. tensile strength films independent chemical composition strategy. since decreased DP more, from enzymatically pre-treated lower strength.