用三亚乙基四胺(TETA)作为固化剂,通过双酚A环氧树脂在聚乙二醇(PEG)介质中的聚合反应诱导相分离制备具有三维骨架结构的整体型环氧树脂大孔聚合物.固定PEG1000与PEG2000的质量比为6∶1,分别研究了环氧树脂与PEG的比例关系和TETA的用量对整体型大孔聚合物孔结构的影响,用FT-IR、SEM、BET和MIP对整体型大孔聚合物进行表征并将其用于重金属离子的吸附.结果表明,改变环氧树脂与PEG的比例关系或者TETA的用量都可以调控大孔聚合物的孔结构,其孔径为0.1~1 μm.孔径最小的整体型大孔聚合物比表面积最大,约84.4 m2/g,但孔径较大的整体型大孔聚合物对重金属离子(Cu2+)的吸附性能更好,吸附量高达113.1 mg/g.
With TETA as curing agent, 3D skeletal epoxy-based macroporous polymer monoliths were prepared by the polymerization-reaction-induced phase separation of bisphenol A epoxy resins in PEG medium.While the weight ratio of PEG1000 to PEG2000 was fixed at 6/1, the influences of the weight ratio of epoxy to PEG and the amount of TETA on the pore structure of the macroporous polymer monoliths were studied respectively.Macroporous polymer monoliths were characterized by FT-IR, SEM, BET and MIP, and were used to adsorb heavy metal ions.Results show that the pore structure of macroporous polymer can be adjusted by changing the weight ratio of epoxy and PEG or the amount of TETA, and the pore sizes are adjusted in a range of 0.1-1 μm.The monolithic macroporous polymer is minimum with minimum pore size reaches the maximum when the pore size possesses the maximum specific surface area, which is about 84.4 m2/g.On the other side, the macroporous polymer with larger pore size exhibit higher adsorption performance for Cu(Ⅱ) ions, which can reach up to 113.1 mg/g.
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