CAJ | 학술논문

以正丙醇锆为前驱体,通过颗粒溶胶路线制备ZrO_2溶胶,并以此溶胶制备出稳定的制膜液.采用浸浆法,经过一次涂膜,在平均孔径约为70 nm的片状α-Al_2O_3支撑体上制备出完整无缺陷的孔径小于10 nm的中孔ZrO_2陶瓷膜,详细考察了烧成温度对ZrO_2粉末和ZrO_2中孔膜性能的影响.在450℃的烧成温度下制备出孔径约为7 nm的ZrO_2中孔膜,该膜对PEG的截留分子量为19500,在原料液侧压力为0.76 MPa、温度(23±1)℃条件下,纯水渗透通量为30～35 L/(m~2×h).经HNO_3(pH=2)和NaOH(pH=13)溶液动态腐蚀后的ZrO_2中孔膜对PEG截留分子量的变化表明,所制ZrO_2膜具有较高的耐酸碱腐蚀性能.
이정병순고위전구체,통과과립용효로선제비ZrO_2용효,병이차용효제비출은정적제막액.채용침장법,경과일차도막,재평균공경약위70 nm적편상α-Al_2O_3지탱체상제비출완정무결함적공경소우10 nm적중공ZrO_2도자막,상세고찰료소성온도대ZrO_2분말화ZrO_2중공막성능적영향.재450℃적소성온도하제비출공경약위7 nm적ZrO_2중공막,해막대PEG적절류분자량위19500,재원료액측압력위0.76 MPa、온도(23±1)℃조건하,순수삼투통량위30～35 L/(m~2×h).경HNO_3(pH=2)화NaOH(pH=13)용액동태부식후적ZrO_2중공막대PEG절류분자량적변화표명,소제ZrO_2막구유교고적내산감부식성능.
Preparation and characterization of mesoporous ZrO_2 membrane with the pore sizes less than 10 nm were studied. A stable ZrO_2 sol with a mean particle size about 100 nm was successfully synthesized with zirconium n-propoxide as precursor through a colloidal sol-gel route. PVA was selected as the drying chemical controlling additive to modulate the viscosity of sol suitable for membrane formation. Y(NO_3)3·6H_2O was used as a Y-precursor to form Y-stabilized ZrO_2. Defect-free mesoporous ZrO_2 membrane superimposed on a-Al_2O_3 support disk with a mean pore size of 70 nm was fabricated via dip-coating and subsequently calcined in the temperature range of 450～650℃. The effect of calcination temperature on the properties of unsupported ZrO_2 membrane (powder) as well as the supported ZrO_2 membranes was studied in detail. The molecular weight cut off (MWCO) and mean pore size of mesoporous ZrO_2 membrane were in the range of 19500～62600 and 7.3～13 nm, respectively. The optimized membrane with an average pore size of 7.3 nm showed a MWCO value of 19500 after heat treatment at 450℃. The corrosion resistance of ZrO_2 membrane showed a relative high stability, as proved by the variation of MWCO of PEG after the membrane was treated with HNO_3 and NaOH.