首先选用醇解、酶解两种方法对玉米淀粉进行预处理,然后再以预处理淀粉和β-环糊精为原料,聚乙二醇6000为分散剂,过硫酸铵为引发剂,N,N′-亚甲基双丙烯酰胺(MBAA)为交联剂,采用水包水乳液聚合法制备淀粉微球。利用红外(IR)图谱及差热(DSC)曲线对微球结构进行了表征。测定了微球对亚甲基蓝的吸附性能。结果表明,当工艺条件为:酶解淀粉1.5g和β-环糊精0.5g,PEG浓度40%,N,N′-亚甲基双烯丙酰胺0.6g,过硫酸铵为0.2g,水相体积50m L,反应时间5h,反应温度50℃时,制备的淀粉微球粒度均匀,形状规则,分散性好。在常温下,当亚甲基蓝浓度为4mg/L时,微球及原淀粉对亚甲基蓝的吸附率分别为0.963和0.652mg/g,微球较原淀粉吸附率高出47.7%,吸附性明显增强。 First of all, alcoholysis and enzymolysis were used to pretreat corn starch. Then, pretreated starch and β-cyclodextrin were used as raw materials, polyethylene glycol 6000 as dispersant, ammonium persulfate as initiator, N, N’-methylene bisacrylamide (MBAA) as cross-linking agent, the starch microspheres were prepared by water-in-water emulsion polymerization. Microstructure of the microspheres was characterized by infrared (IR) spectroscopy and differential scanning calorimetry (DSC). The adsorption properties of microspheres to methylene blue were measured. The results showed that when the technological conditions were as follows: 1.5g of enzymolysis starch, 0.5g of β-cyclodextrin, 40g of PEG, 0.6g of N, N’-methylenebisacrylamide, 0.2g of ammonium persulfate, Phase volume 50m L, reaction time 5h, reaction temperature 50 ℃, the prepared starch microspheres have uniform particle size, regular shape and good dispersibility. At room temperature, when methylene blue concentration was 4 mg / L, the adsorption rates of methylene blue and microspheres were 0.963 and 0.652 mg / g, respectively. The adsorption capacity of microspheres was 47.7% higher than that of native starch.