The invention discloses a
lignin-based
biomass pigment and a preparation method thereof, and belongs to the technical field of
pigment production. The method comprises the following steps: carrying out purification treatment and modification treatment on
lignin, mixing and stirring a modified
lignin derivative dissolving solution and a dye dissolving solution at a certain temperature, and carrying out
centrifugal separation or
filtration to obtain the lignin-based
biomass pigment. From the perspective of
pigment composition, the purified lignin derivative is added into the dye to form ionic bond combination with the soluble dye to generate the pigment, so that active groups such as phenolic hydroxyl groups, alcoholic hydroxyl groups, carbon-based conjugated double bonds and carboxyl groups are introduced into the components, the prepared pigment has high
biocompatibility, and the stability of the pigment can be maintained for 500 hours. Meanwhile, the preparation method is simple and high in economic benefit, and has wide application prospects in the aspects of
printing ink, ink-jet printing,
pigment printing paste coloring and the like.