Lignin porous microspheres based on W/O/W type multiple emulsion solvent volatilization and preparation method and application thereof

Abstract

The invention discloses a lignin porous microsphere based on W / O / W type multiple emulsion solvent volatilization and a preparation method and application thereof. The method comprises the following steps: firstly, carrying out radiation hydrophobic modification on lignin, dispersing the modified lignin in water, adding alkali to dissolve the lignin, filtering, adding acid to adjust the pH value to separate out the lignin, and taking lignin particle dispersion liquid after separation as a water phase; adding water into the oil phase containing the surfactant, and emulsifying to obtain W / O primary emulsion; adding the W / O primary emulsion into the outer water phase, and stirring and emulsifying at a high speed to obtain W / O / W type multiple emulsion; and drying the emulsion to form the pure lignin porous microspheres. The preparation method is simple, the organic oil phase can be recycled and reused, and the potential of large-scale industrialization is achieved. Meanwhile, according to the method, the balling effect is good, the particle size is controllable, pore channels in the spheres are rich, and the dried microspheres are easy to store and convenient to transport. The sphere is pure lignin, has good biocompatibility, is biodegradable, and has zero pollution to the environment and organisms.

Description

technical field [0001] The invention belongs to the technical field of microsphere preparation, and in particular relates to a lignin porous microsphere based on the volatilization of a W / O / W type double emulsion solvent and a preparation method and application thereof. Background technique [0002] Microspheres refer to spherical or quasi-spherical entities with macromolecular materials as the matrix skeleton, the particle size is between 1-250 μm, and they are mainly divided into solid microspheres, hollow microspheres and porous microspheres according to their structure. Among them, porous microspheres have a larger specific surface area and space capacity because of their rich and interconnected pore structure inside and outside, so they have unique advantages in the application of micro-adsorption materials, drug carriers, and catalytic materials. Commonly used polymer materials mainly include natural polymer materials such as gelatin, chitosan, and sodium alginate, and...

AI Technical Summary

Problems solved by technology

At the same time, the use of highly toxic organic solvents in the reaction process does not conform to the concept of green chemistry

In these methods, lignin is usually combined with other polymers instead of only using lignin as a single sphere material, resulting in a low proportion of lignin in the sphere material, and the maximum utilization of lignin has not been realized.

Images