Hollow open lignin-based temperature-sensitive microsphere as well as preparation method and application thereof

Abstract

The invention discloses a hollow opening lignin-based temperature sensitive microsphere and a preparation method thereof. The preparation method comprises the following steps: S1, adding a lignin raw material, allyl bromide and an alkaline compound into water to react; s2, adding the product obtained in the step S1, an acid-binding agent and 2-bromo isobutyryl bromide into an organic solvent for reaction; s3, adding the product obtained in the step S2 into an organic solvent to form an organic solution, and dripping the organic solution into the organic solution or dripping the organic solution into water to obtain hollow open lignin microspheres; and S4, adding the hollow open lignin microspheres, a temperature-sensitive monomer and a catalyst into water, deoxidizing, and adding a reducing agent to obtain the hollow open lignin-based temperature-sensitive microspheres. The preparation method disclosed by the invention has the advantages of wide raw material source, simple principle, mild reaction conditions and the like, and the prepared hollow open lignin-based temperature-sensitive microspheres have temperature-sensitive characteristics. The invention also discloses application of the hollow open lignin-based temperature-sensitive microsphere in the field of loading and delivering functional substances.

Description

technical field [0001] The invention mainly relates to the technical field of hollow opening microspheres, in particular to a hollow opening lignin-based temperature-sensitive microsphere and its preparation method and application. Background technique [0002] Hollow opening microspheres have aroused great interest due to their low density, large specific surface area, selective adsorption, and unique optoelectronic properties. Hollow opening microspheres are divided into non-polymer hollow opening microspheres and polymer hollow opening microspheres. Compared with the two, polymer hollow opening microspheres have the characteristics of low toxicity, many types of raw materials, multiple reaction sites and functionalization. , has more advantages in terms of functional substance carriers. However, with the increasing consumption of petroleum resources, the resource crisis has become increasingly prominent, and people have gradually turned their attention to renewable resou...

AI Technical Summary

Problems solved by technology

However, the cavities and openings of the obtained lignin hollow opening microspheres cannot be intelligently controlled. When applied to the loading and delivery of functional substances, the existence of openings will inevitably lead to the loss of functional substances after the microspheres are loaded with functional substances.

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