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

Abstract

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; the oxygen index of the material is 27%, so a flame retardant grade is reached; after the fresh strawberries are stored with composite material at 10-12 DEG C for 5 days, a weight loss rate is only 5%, so the composite material can be used for preparing active composite films, active packaging paper or paperboards with ultraviolet shielding and synergistic flame-retardant functions.

Description

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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AI Technical Summary

Benefits of technology

This patented technology uses lignocellulosic materials (lignoat) that are extracted from wood pulp during production processes for making products like furniture panels. These extractives have unique properties such as high strength, durability against environmental stressors, ability to absorb harmful chemical agents, etc., which make them useful components in various applications including medical devices and protective coatings on fabrics used in clothing manufacturing industries.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the performance of various types of plastics without adding other substances that may harm their environment. Specifically, there are challenges related to developing more efficient ways to use these plastic substrate waste streams while producing useful products like lignos. Nanocellular lignan offers promise due to its excellent characteristics including strength, durability against environmental attacks, UV absorbance, antimony metal content, water repelling property, lightweight texture, surface modification capabilities, and biocide activity. Additionally, because they have multiple applications beyond just making things we want to combine them together to create stronger composite structures called nanosilverlets.

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