Star-shaped hyperbranched polymer with triethanolamine core, carboxylate lateral group and dithiocarboxylate end group, and preparing method as well as application thereof

摘要

A star-shaped hyperbranched polymer with a triethanolamine core, a carboxylate lateral group and a dithiocarboxylate end group has a formula of N[CH₂CH₂OCOCH₂CH₂(COOM)N(CSSM)CH₂CH₂N(CSSM)₂]₃, wherein M is Na⁺, NH₄⁺ or K⁺. The star-shaped hyperbranched polymer has an effectively stabilization effect on heavy metals in MSWI fly ash. A method thereof for stabilizing is simple, low in dosage, cheap and without secondary pollution. Therefore, heavy metals leaching concentration in fly ash stabilized production is lower than a limit of Chinese national standard. Furthermore, acid and alkali resistance thereof is sufficient, which decreases a long-term pollution risk in natural environment.