| abstract |
The invention belongs to the technical field of functional polymer materials, and in particular relates to beaded nanocellulose microfibers, a preparation method and their application in the preparation of composite hydrogels. The preparation process of the beaded nanocellulose microfiber suspension is as follows: dispersing microcrystalline cellulose in deionized water, preparing a dispersion liquid, adding sulfuric acid to the dispersion liquid, until the content of sulfuric acid in the dispersion liquid is 56.8-64.8% ( w/w), the content of microcrystalline cellulose is 3.4-8.1% (w/w), hydrolyzed at 30-80 ℃ for 110-120 min, centrifugally washed and dialyzed to neutrality to obtain a hydrolyzed cellulose suspension; The cellulose suspension is subjected to ultrasonic treatment to obtain a suspension of beaded nanocellulose microfibrils. In the beaded nanocellulose microfiber suspension prepared by the invention, the beaded nanocellulose microfibers have a relatively high aspect ratio, and are intertwined and connected to form a three-dimensional network structure. |