DOI: 10.36347/sjet.2018.v06i11.006

Pages: 344-350

In order to obtain a modified cellulose-based hydrogel with excellent properties, this experiment determined the superior process of gel preparation by controlling single factor conditions. The nano-SiO2 was dispersed in a NaOH/urea liquid-containing system, and modified cellulose (CMC) was added under refrigeration to prepare a cellulose matrix. The cross-linking agent epichlorohydrin was added to the matrix to crosslink the hydroxyl groups of the cellulose to construct a cellulose chemical gel, and the gel was subjected to mechanical, infrared, swelling and the like. The effects of matrix stirring time, matrix freezing, chitosan and cross-linking agent on the formation, properties and stability of hydrogel were investigated. The results showed that a certain amount of nano-SiO2 was dispersed in the NaOH/urea liquid system, stirred for 6 h, the cellulose was dissolved under freezing conditions, 2 mL cross-linking agent and 1 g chitosan was added at 60 °C. After drying for 6 h, the prepared gel has the best performance.