Lignin nanoparticle/polyvinyl alcohol/chitosan ternary composite material as well as preparation method and application thereof

• Main Authors: ZENG SHIYI, ZHANG SHENCHONG, LI JING, CHENG JUNHAO, ZHOU MINXIA
• Format: Patent
• Language: Chinese; English
• Published: 16.11.2021
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; IMPREGNATING OR COATING OF PAPER; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G

The invention discloses a lignin nanoparticle/polyvinyl alcohol/chitosan (LNP/PVA/CH) ternary composite material as well as a preparation method and application thereof, belonging to the technical field of functional composite material preparation. The preparation method comprises the following steps: firstly, preparing LNP by using lignin as a raw material through a solvent anti-solvent method, then blending the LNP with a polyvinyl alcohol solution and a chitosan solution, and carrying out grafting modification to prepare an LNP/PVA/CH ternary composite material; and uniformly coating the surface of raw paper with the composite material through a coating process to obtain coated paper. The ultraviolet transmittance of the coated paper based on the 3LNP/PVA/CH composite material is 10% or below generally in a visible region and a near ultraviolet region, the transmittance in most of the near ultraviolet region is less than 5%, and 95% of ultraviolet light absorption in the near ultraviolet region is realized