摘要： 以丙烯酰胺、丙烯酰氧乙基三甲基氯化铵、2-丙烯酰胺-2-甲基丙磺酸、正硅酸乙酯为原料，季戊四醇为支化剂，硝酸铈铵作引发剂，制备了一种超支化两性聚丙烯酰胺（PADS）。在单因素实验基础上，利用响应面法优化了超支化聚丙烯酰胺的合成工艺条件，确定较佳工艺条件：引发剂占总单体质量的0.05%，正硅酸乙酯占丙烯酰胺质量的2.5%、反应温度50℃。在PADS投加量为25 mg/L、温度35℃、硅藻土悬浮液pH为6的条件下，硅藻土悬浮液上清液透光率和絮凝时间达97.69%和8 s，表明PADS对模拟废水有较好的絮凝效果。

关键词: 超支化, 两性聚丙烯酰胺, 响应面, 絮凝性能

Abstract: A kind of hyperbranched amphoteric polyacrylamide(PADS) has been synthesized,using acrylamide(AM), acryloxyethyl trimethylammonium chloride,2-acrylamido-2-methylpropane sulfonic acid and ethyl orthosilicate as raw materials,penta-erythritol as branched agent,and cerium ammonium nitrate as initiator. On the basis of single factor experiments,the technological conditions for the synthesis of hyperbranched polyacrylamide have been optimi-zed by response surface methodology,and the optimum process conditions determined as follows:the initiator accounts for 0.05% of the total monomer,tetraethyl orthosilicate accounts for 2.5% of AM,and reaction temperature 50℃. The transmittance rate and flocculation time of diatomite suspension supernatant fluid reach 97.69% and 8 s,respectively, when PADS dosage is 25 mg/L,temperature 35℃ and pH of diatomite suspension is 6. The results show that PADS has comparatively good flocculation effect on simulated wastewater.

Key words: hyperbranching, amphiprotic polyacrylamide, response surface, flocculation performance

中图分类号: 

• TQ326

• X703