MAPTES-Fe_3O_4的制备及作为可回收驱动液的研究  

Preparation of MAPTES-Fe_3O_4 and its recycling draw agent in forward osmosis

作　　者：许高杰[1] 刘安康[1] 何涛[1,2] 李雪梅[1,2] 

机构地区：[1]南京工业大学化学化工学院,江苏南京210009 [2]中国科学院上海高等研究院先进材料科学与工程中心,上海201203

出　　处：《南京工业大学学报（自然科学版）》2012年第5期104-107,共4页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家重点基础研究发展计划(973计划)资助项目(2009CB623402);国家自然科学基金资助项目(20976083);科技部中国-以色列合作研究项目

摘　　要：合成具有羧酸端基的功能化硅烷,以该硅烷为表面改性剂,对以共沉淀法制备的超顺磁Fe3O4纳米粒子(SPION)进行改性,获得表面为羧酸官能团的SPION纳米粒子。以扫描电子显微镜(SEM)、红外光谱(FT-IR)、振动样品磁强计(VSM)等手段对改性SPION进行表征。结果表明:改性的纳米粒子的比饱和磁化强度为44.4emu/g,在外加磁场作用下易与水分离。将羧酸改性SPION中和为钠盐后,研究了其作为正渗透驱动液的驱动效果。以商业反渗透膜为评价介质,当其质量分数为8.1%时,通量为2.0 L/(m2.h)。Silane coupling agent with a carboxylic acid end functional group was prepared by amidation of maleic anhydride with aminopropyltriethoxysilane. Superparamagnetic iron oxide nanoparticles （SPIONs） were prepared by chemical co-precipitation method and coated with carboxylic acid on the nanoparticle surface. The modified SPIONs were analyzed by the scanning electron microscope （SEM） , Fourier trans- form infrared spectroscope （FF-IR）, vibrating sample magnetometer （VSM）, and thermo gravimetric ana- lyzer （TGA）. The SPIONs showed the saturation magnetization was 44.4 emu/g and it was easily recov- ered by the application of an external magnetic field. The nanoparticles were used as draw agent in a for- ward osmosis process after turning into the sodium form with a water flux of 2.0 L/（ m2 h） at the draw solution concentration of 8.1% using a commercial RO membrane.

关 键 词：超顺磁 纳米粒子 正渗透 驱动剂 回收 

分 类 号：TQ028.8[化学工程]