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OALib Journal期刊
ISSN: 2333-9721
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阳离子型聚氨酯泡沫载体的制备及对活性污泥的吸附性能
DOI: 10.3724/SP.J.1105.2012.11382, PP. 679-684
Keywords: 聚氨酯泡沫塑料,亲水性,阳离子,固定化载体
Abstract:
通过在聚氨酯泡沫塑料制备过程中加入不同用量的N-甲基二乙醇胺(简称N-MDA),并对聚氨酯泡沫进行酸化处理,得到了一系列阳离子型聚氨酯泡沫塑料(简称改性PUF),并对其结构和性能进行了研究.结果表明,以醋酸和磷酸(质量比为1∶1)作为N-MDA的催化抑制剂,可在较宽N-MDA用量范围内顺利合成改性PUF.随着N-MDA用量的增加,改性PUF的回弹率、拉伸强度及断裂伸长率均出现先增强后降低的趋势,而阳离子含量和亲水性不断增加.进一步将改性PUF作为固定化载体用于吸附活性污泥,结果显示,由于亲水性的增强和静电相互作用,改性PUF对活性污泥的吸附速度明显高于普通聚氨酯泡沫(简称对比PUF),其对活性污泥的单位体积吸附量最高可达180g/L,是对比PUF(80g/L)的2倍以上.
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