阳离子胶原蛋白絮凝剂的制备及表征(续)

Synthesis and evaluation of a novel cationic collagen-based flocculant

以皮革废弃物提取的明胶为原料，丙烯酰胺（AM）和丙烯酰氧乙基三甲基氯化铵（DAC）为单体（AM：DAC摩尔比为4：1），叔丁基过氧化氢和焦亚硫酸钠为引发剂，接枝共聚合成了阳离子胶原蛋白絮凝剂P（C—AM—DAC）。以絮凝剂对油田模拟废水的浊度去除率为指标，通过响应面法优化了P（C—AM—DAC）接枝共聚条件：m（明胶）：m（单体）为1：1．92、引发剂用量0．03mol／L、接枝温度44．2℃、接枝时间3．0h。在此条件下制备的新型絮凝剂表现出优异的絮凝效果，对油田模拟废水中污染物去除率可达91．3％。同时利用傅立叶变换红外光谱（FT—IR）和热重分析（TGA）对其进行表征。

Cationic collagen-based flocculant was synthesized by graft copolymerization using gelatin extracted from leather wastes as raw material, acrylamide （AM） and acryloyloxyethyl trimethyl ammonium chloride （ DAC ） as mono- mers （ mole ratio of AM ： DAC was 4 ： 1 ）, hydrogen and sodium metabisulfite as initiators. Using flocculant on tur- bidity removal rate of oilfield simulated wastewater as an indicator, the graft copolymerization conditions of P （ C-AM- DAC） were optimized by response surface method. The re（gelatin） ： m（monomers） mole ratio is I ： 1.92, initiator dosage 0.03tool/L, grafting temperature 44.2℃ , grafting time 3. Oh. The novel floeculant prepared under the condi- tions shows excellent flocculation effect, and the removal rate of pollutants in oilfield simulated wastewater reach 91.5%. It was characterized by Fourier transform infrared spectroscopy （FT-IR） and thermogravimetric （TGA） a- nalysis.