| abstract |
The invention discloses a dendritic cellulose-based amphoteric flocculating-decolorizing agent and a preparation method of the dendritic cellulose-based amphoteric flocculating-decolorizing agent. The dendritic cellulose-based amphoteric flocculating-decolorizing agent is characterized in that a cellulosic material is mainly taken as a molecular framework; the cellulosic material is oxidized into dialdehyde cellulose by utilization of sodium periodate; then an aldehyde group and an amino group are used to form a Schiff-base structure; the flocculating-decolorizing agent is formed by means of bonding and grafting polyethyleneimine; the cellulosic material, the sodium periodate and the polyethyleneimine are sequentially added for preparation by means of taking water as a solvent; the surface charge characteristic and active site of the flocculating-decolorizing agent are regulated by means of changing a mass ratio of the cellulosic material to the polyethyleneimine. The dendritic cellulose-based amphoteric flocculating-decolorizing agent has the advantages of high flocculation efficiency, stable effect, environmental friendliness, and efficient application in purification treatment of complex water body, such as papermaking, printing and dyeing, heavy metal containment and the like. |