摘要
以壳聚糖为分散剂，用化学共沉淀法制备Fe3O4磁性粒子，通过多次实验总结出最佳工艺条件：反应液的初始浓度为Fe^3＋ 0．15mol／L，Fe^3＋／Fe^2＋（物质的量）之比在1．70～1．75之间；25％NH3·H2O作为沉淀剂，并过量20％～30％，溶液pH=9～11；反应温度35℃，反应时间60min，搅拌速度3000r／min。用壳聚糖作分散剂，其最佳用量为每60mL载液0．0400g，温度控制在50℃左右，在pH值为1．0的条件下进行包覆。在该条件下制得的壳聚糖磁性微球放置17个月，无明显分层现象。利用了IR、TG—DTA和紫外可见分光光度法等方法对产品进行了表征。
To prepare the Fe3O4 magnetic microspheres with chemical coprecipitation method, the chitosan was used as the dispersant and summarized the optimum preparation conditions. The initial concentration of Fe3O2 was 0. 15mol/L, where the mole ratio of Fe3＋/Fe2＋ was 1.70 - 1.75; The precipitant, 25% NH3H20 was used 20 - 30% excessively under pH =9 - 11.35℃ and with a stirrer speed of 3000r/min for 60min; As dispersant, the optimum dosage of ehitosan was 0.0400g each 60mL responding liquid under 50℃ and pH = 1.0. No apparent lami- nation of the chitosan magnetic mierospheres had arisen under the above condition after being placed for 17 months. Chitosan magnetic microspheres were characterized by IR, TG- DTA and UV -visible spectrophotometry, etc.
出处
《嘉应学院学报》
2010年第2期52-55,共4页
Journal of Jiaying University
基金
广东省科技厅科技计划资助项目(2005B16001065)
2009年广东省自然科学基金项目(9251401501000001)
