聚丙烯酸/聚乙烯吡咯烷酮/坡缕石黏土复合吸附剂的制备

Preparation and Characterization of Acrylic Acid /Polyvinylpyrrolidone /PGS Composites Adsorbent

以N,N'-亚甲基双丙烯酰胺(MBA)为交联剂,过硫酸钾(KPS)为引发剂,以丙烯酸(AA)、聚乙烯吡咯烷酮(PVP)及酸化坡缕石黏土(PGS)作为原料,通过自由基聚合反应制备出PAA/PVP/PGS(PAPP)复合吸附材料,通过单因素实验优化了各原料间的比例。运用扫描电子显微镜(SEM)、红外光谱(FTIR)对复合材料进行了形貌和结构表征,结果表明,坡缕石黏土表面羟基与单体发生了接枝共聚,在复合材料中黏土分散良好。通过对亚甲基蓝废水的吸附发现,该材料对亚甲基蓝的吸附量可达968.69 mg/g,具有良好的吸附能力,因此,该复合材料可以作为一种有潜力的吸附剂用于除去废水中的阳离子染料。

The composite PAA/PVP/PGS（PAPP） was prepared by free radical polymerization using N, N＇-methylenebisacrylamide （MBA） as the cross-linking agent, potassium persulfate （KPS） as the initiator, acrylic acid （AA）, polyvinylpyrrolidone （PVP） and palygorskite （PGS） as the raw material. Orthogonal experiments were designed to optimize the proportion of each raw material. The morphology and structure were characterized by scanning electron microscopy （SEM） and Fourier Transform Infrared spectrometer （FT-IR）. The results showed that the graft copolymerization reaction was taken placed between acrylic acid and palygorskite micropowder, the clay in composite material dispersed well. The adsorption study showed that the composite have a good adsorption capacity for methyl blue solution, and it’s adsorption capacity could reached 968.69 mg/g. Therefore, It can be used as a potential adsorbent for the removal of anionic dyes from wastewater .