Preparation method of high-surface quality degradable polymer hollow microsphere

Abstract

The invention discloses a preparation method of a high-surface quality degradable polymer hollow microsphere. The preparation method comprises the following steps: dissolving poly-alpha-methyl styrenein fluorobenzene as an oil phase; mixing a cationic macromolecule organic salt water solution and a PVA water solution in a certain proportion to form a uniform mixed water solution as an outer waterphase; respectively injecting ultrapure water, the oil phase and the outer water phase into corresponding channels of a dual coaxial emulsion granule generator by virtue of three precise micro-injection pumps, and preparing water-in-oil-in-water W1 / O / W2 dual composite emulsion granules; collecting the dual composite emulsion granules into a rotary evaporation bottle containing the outer water phase, and carrying out solidification by virtue of a rotary evaporator at a speed of 25rpm-35rpm and a heating temperature of 30-40 DEG C for 96-144 hours, so as to obtain the microsphere; and cleaningthe completely solidified microsphere by virtue of purified water at 65-85 DEG C, replacing an inner water phase with ethanol for 60-80 hours, and putting the microsphere into a drying tank, and drying at 34-50 DEG C, so as to obtain the hollow microsphere with high sphericity degree and surface quality.

Description

technical field [0001] The invention belongs to the field of polymer processing and molding, and in particular relates to a preparation method of degradable polymer hollow microspheres with high surface quality. Background technique [0002] As a clean and green new energy in the future, controllable nuclear fusion has received extensive attention and research, among which laser inertial confinement fusion (ICF) is currently a research hotspot in the field of controllable thermonuclear fusion, and has attracted the attention of advanced countries such as Europe and the United States. In the ICF physics experiment, the GDP target is an important target at present and in the future because of its isotropy, compact structure, optical measurement and infrared heating in the visible light band. Therefore, the surface quality of GDP microspheres plays a decisive role in the results of ICF physical experiments. [0003] At present, GDP microspheres use a degradable polymer hollow ...

AI Technical Summary

Problems solved by technology

However, the PAA aqueous solution cannot dissolve well with inorganic salts, and the surface quality of the microspheres prepared by using this external aqueous phase is poor, and there are many defects on the surface, which seriously affects the surface quality of the GDP coating.

Another reason why there are fewer types of external water phases currently available for the preparation of PAMS mandrel microspheres that meet the needs is that the addition of the external water phase cannot affect the degradation residue of subsequent PAMS mandrel microspheres. High molecular weight PVA and inorganic salts Although the blend system can prepare PAMS mandrel microspheres with high sphericity and surface quality, there are many degradation residues and cannot be used in the preparation process of mandrel microspheres