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在反相乳液体系中以β-环糊精(β-CD)为原料,环氧氯丙烷(ECH)为交联剂,合成了β-环糊精聚合物(β-CDP)微球,然后再用Na3P3O9进行阴离子化得到阴离子β-CDP微球。采用L9(34)正交试验得出了最佳合成工艺,分别使用激光粒度分布仪、红外光谱仪和综合热分析仪进行了表征,并考察了阴离子微球对Pb2+、Cu2+和Zn2+的吸附性能。结果表明,最佳合成工艺条件是:n(ECH)∶n(β-CD)为15∶1、乳化剂用量0.8g、乳化温度50℃、反应时间7h;影响因素的大小依次为:反应时间>乳化剂的用量>n(ECH)∶n(β-CD)>乳化温度;阴离子β-CDP微球对该实验所研究的金属离子均有较强吸附力,且吸附能力次序为:Zn2+>Pb2+>Cu2+。
Β-cyclodextrin polymer (β-CDP) microspheres were synthesized by using β-cyclodextrin (β-CD) as the raw material and epichlorohydrin (ECH) as the crosslinking agent in the inverse emulsion system. Anionized with Na3P3O9 to obtain anionic β-CDP microspheres. The optimum synthesis conditions were obtained by orthogonal experiment of L9 (34). The laser particle size distribution, infrared spectroscopy and thermal analysis were used respectively to characterize the adsorption of Pb2 +, Cu2 + and Zn2 +. The results showed that the optimum synthesis conditions were as follows: the ratio of n (ECH): n (β-CD) was 15:1, the dosage of emulsifier was 0.8g, the temperature of the emulsion was 50 ℃ and the reaction time was 7h.The influencing factors were as follows: reaction time > The amount of emulsifier> n (ECH): n (β-CD)> emulsifying temperature; anionic β-CDP microspheres have strong adsorption force on the metal ions studied in this experiment, and the adsorption capacity order is: Zn2 + Pb2 +> Cu2 +.