光响应性吸油树脂的制备及其吸油性能研究

Preparation of a novel photoresponsive oil sorbers and research of its oil absorbing properties

关键词:  偶氮苯聚合物  吸油树脂  光响应性  吸油倍率  解吸附 

Key words:  azobenzene polymers  oil absorbing resin  photoresponsive  absorption capacity  desorption

摘要:

以甲基丙烯酸月桂酯、丙烯酸丁酯和丙烯酸甲酯为聚合单体,以4,4′-双(甲基丙烯酰胺)-偶氮苯(Azo-CL-M)为光响应性交联剂,通过悬浮聚合法制备了具有光响应性和疏水性的树脂小球(Azo-OS)。利用扫描电子显微镜表征了吸油树脂的形貌,紫外可见光谱仪研究了材料的光异构化行为。测试了树脂对不同有机溶剂以及不同稀释程度的油品的吸油倍率,研究了树脂在紫外光和自然光条件下对甲苯的解吸附行为。实验结果表明,光响应性吸油树脂对不同种类有机溶剂的饱和吸附量不同,这与材料-油品之间的相似相容及溶剂化作用有关。树脂对菜籽油、煤油、原油等油品的饱和吸附量与油品的稀释程度有关,随着稀释程度的增加,树脂对几种油品的饱和吸油倍率逐渐增加。此外,吸油树脂对紫外光的响应特性,使得树脂在365 nm的紫外光照射下对甲苯的脱附速率提高了5倍。由于吸油树脂密度比水小,能漂浮在水表面,便于吸收水面浮油,因此在海上漏油事故的处理中具有广泛的应用前景。 

Abstract:

A novel photoresponsive polymeric beads with high oil absorbency was synthesized via suspension polymerization technique. Lauryl methacrylate, butyl acrylate, and a short-chain methyl acrylate were used as the monomers and bis (methacryloylamino) azobenzene was used as the photoresponsive crosslinker. The morphology and light isomerization behavior of the oil absorbing resin were characterized by scanning electron microscopy and UV-vis spectrum respectively. The absorbency of the oil absorbing resin for various solvents and/or diluted oils was studied. It was found that the saturated absorption capacity of the polymeric resin for various organic solvents was different, which was determined by the principle of similar compatibility and the solvation effect. It was further observed that the oil absorbency of the resin greatly depended on the dilution degree of the oil. The more diluted the oil, the larger the absorption capacity of the resin. In addition, the response characteristics of the oil absorbing resin enhanced its desorption rate of toluene by 5 times under the UV light. The findings in this study indicated that the prepared photoresponsive oil absorbing resin has broad application prospects in the treatment of oil spills at sea.