Cellulose composite microsphere and preparation method thereof

Abstract

The invention discloses a cellulose composite microsphere, a preparation method thereof and application. The particle size of the cellulose composite microsphere is 1mum-1200mum, the specific surface area of the cellulose composite microsphere is 100m<2> / g-500m<2> / g, and the aperture of the cellulose composite microsphere is 200nm-900nm. The preparation method comprises the following steps of: preparing a mixture solution of cellulose and a composite material by using the cellulose as a matrix, a polymer material as composite material and a water solution of alkali / urea or alkali / thiourea as a solvent, and obtaining the cellulose composite microsphere through sol-gel phase transition and cross-linking agent cross linkage. The advantages of cellulose microsphere are reserved by the cellulose composite microsphere, and due to the adding of the composite material, new functional groups are simultaneously added for the surface of the microsphere and further decoration and modification are facilitated. An organic solvent used in the preparation method disclosed by the invention can be reused, the whole preparation technology is simple, low in time consuming, undemanding for equipment and convenient for industrial production, and the prepared cellulose composite microsphere has a good flow property and mechanical property and a wide application.

Description

technical field

[0001] The invention relates to a cellulose material-based adsorbent, in particular to a cellulose composite microsphere and its preparation method and application, belonging to the field of polymer chemistry. Background technique

[0002] Cellulose is the most abundant natural renewable resource. According to the estimates of scientists, the renewable cellulose produced through biosynthesis reaches more than 100 billion tons every year. Because cellulose has the advantages of being cheap, degradable, and non-polluting to the ecological environment, countries all over the world pay more attention to the performance research and development of cellulose, a natural polymer material, in today's increasingly serious environmental pollution problems.

[0003] Cellulose is one of the most uniform and simple polymers in the field of polysaccharides. It is composed of D-anhydroglucopyranoside (AGU), which is connected with each other by (1-4) glycosidic bonds. There ...

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