离子交换与吸附

以聚氨酯泡沫(PUF)为基材,首先采用盐酸处理使其表面的氨基裸露,然后以甲醛为偶联剂,在其表面偶联引入β-环糊精(β-CD),得到对苯酚具有良好吸附性能的吸附材料,用于吸附废水中的苯酚并可循环利用,是一种极具发展前景的吸附材料。本研究对所制吸附材料进行了性能测试,采用紫外分光光度法测定样品的固载量;通过吸水率的测定判断样品的吸水性能;此外,采用FT-IR、SEM、XPS等对基材、中间产物及最终产物进行了官能团测定、结构表征及吸附性能的测定。结果表明,β-CD已成功偶联固定于氨基化的PUF表面,β-CD的固载量可达到799.69mg/g,吸水性能大幅度提高,对苯酚的吸附量为144.58mg/g,即所制材料对苯酚具有良好的吸附性能。

Polyurethane foam(PUF) was used as the substrate, firstly treated with hydrochloric acid to expose the amino group on the surface, and then formaldehyde was used as a coupling agent to introduce β-cyclodextrin(β-CD) on the surface to obtain an adsorbing material with good adsorption performance for phenol, the adsorbent material having good adsorption performance to phenol can be used for adsorbing phenol in wastewater, removing pollution and recycling, and is an adsorbent material with good development prospect. The following performance tests were carried out on the obtained adsorbent materials. The immobilization amount of the sample was determined by ultraviolet spectrophotometry, and the water absorption performance of the sample was judged by the measurement of water absorption rate. At the same time, the functional groups, structural characterization and adsorption properties of the substrates, intermediates and final products were determined by FT-IR, SEM, XPS, etc. The results showed that β-CD was successfully coupled and immobilized to the surface of the aminated PUF. The β-CD immobilized amount could reach 799.69 mg/g, and the adsorption amount of phenol was 144.58 mg/g. The sample thus obtained is an adsorbent material having a good adsorption property for phenol.