A lignin derivative including one or more polycations is provided and an article including such a lignin derivative is also provided. Methods of inhibiting microbial growth with an article including such a lignin derivative are further provided.La présente invention concerne un dérivé de lignine comprenant au moins un polycation, ainsi quun article comprenant ledit dérivé de lignine. Linvention concerne en outre des procédés permettant dinhiber la croissance microbienne avec un article comprenant ledit dérivé de lignine.