铜微球对防污剂异噻唑酮的控释作用

以铜微球为包埋载体,4,5-二氯-2-正辛基-4-异噻唑啉-3-酮(简称异噻唑酮)为防污剂,利用毛细吸附作用,将异噻唑酮防污剂包埋进铜微球,并对铜微球中异噻唑酮的释放进行了研究。紫外-可见分光光度计检测表明,铜微球可有效包埋异噻唑酮防污剂,最大包埋质量分数为15.2%;不同的包埋工艺,异噻唑酮有不同的释放速率,最大释放速率为0.38 mg/(L.d),最小释放速率仅为0.08 mg/(L.d),表明铜微球具有较好的控制释放能力。铜微球样品在w(NaC l)=3%的水溶液中的释放速率接近于在蒸馏水中的释放速率。

Performance of Controlled Release of Isothiazoline Antifouling Agent in Copper Microspheres

Copper microspheres were utilized as a microencapsulated vehicle,and 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one(called isothiazoline for short) was used as an antifouling agent.The antifouling agent isothiazoline could enter the lumen of the copper microspheres by capillary attraction and be entrapped effectively.The maximum entrapped mass fraction is 15.2% by the total weight of the sample.Different encapsulation procedures were performed,and the release rates were obtained by determination with UV-visible spectrophotometer.The maximum release rate is 0.38 mg/(L·d),and the minimum release rate is only 0.08 mg/(L·d).Hence,the copper microspheres have a good performance of controlled release of isothiazoline.The release rate of isothiazoline in copper microspheres samples in w(NaCl)=3% solution is close to that in distilled water.