海绵表面原位点击分散聚合改性及其分离油水混合物/乳液研究

Surface modification of sponge by in-situ click dispersion polymerization and separation of oil/water mixture and emulsion

通过在三聚氰胺海绵(MS)表面进行室温巯基-异氰酸酯-长链烷基胺原位点击分散聚合,制备了超疏水吸油海绵PM-MS。利用FTIR,TG,SEM等方法对PM-MS的结构和形貌进行了表征,并考察了PM-MS的性能。实验结果表明,PM-MS骨架表面出现细密聚合物粒子,粗糙度显著提高。随聚合单体十八胺用量的增加,PM-MS表面疏水性提高,接触角显著增大,最高达151.0°。PM-MS对6种油品的吸油量达自身重量的50~120倍,重复吸油性能较好。PM-MS具有较好的油水混合物及油水乳液分离能力,而且随表面疏水性提高,即使对油含量较低的油水乳液也具有较高的分离效率,最高可达90%。

Superhydrophobic PM-MS with high oil absorption capacity was prepared by surface modification via in-situ click dispersion polymerization of thiol,isocyanate and long-chain alkyl amine on the surface of melamine sponge(MS)at room temperature.The structure and morphology of PM-MS were characterized by FTIR,TG and SEM,and the properties of it were studied.The results indicate that dense polymer particles appear on the surface of PM-MS sponge,improving its surface roughness significantly.With the increase of the amount of polymerization monomer octadecylamine,the surface hydrophobicity of PM-MS increases,and the contact angle significantly increases,reaching a maximum of 151.0°.The absorption capacity of PM-MS for 6 types of oil reach 50-120 times its own weight,and it retain a high absorption capacity after cycles.PM-MS has good separation ability to oil/water mixture and oil/water emulsion,and with the increase of surface hydrophobicity,the separation efficiency can reach up to 90%even for the oil/water emulsion with low oil content.