功能材料
功能材料
공능재료
JOURNAL OF FUNCTIONAL MATERIALS
2015年
4期
4144-4147,4152
,共5页
郑海燕%马敬环%赵孔银%黄海滨%刘莹%魏俊富%张新新
鄭海燕%馬敬環%趙孔銀%黃海濱%劉瑩%魏俊富%張新新
정해연%마경배%조공은%황해빈%류형%위준부%장신신
纳滤%海藻酸钙%尿素%硫酸钙%通量%截留
納濾%海藻痠鈣%尿素%硫痠鈣%通量%截留
납려%해조산개%뇨소%류산개%통량%절류
nanofiltration%calcium alginate%urea%calcium sulfate%flux%retention
以尿素为致孔剂制备了海藻酸钙(CA)水凝胶过滤膜,测试了其通量、截留率和力学性能;通过扫描电子显微镜(SEM)观测其过滤硫酸钙前后的表面形貌.结果表明,增加尿素含量,均导致膜应力和应变的下降;而膜的纯水通量则迅速增大,尿素含量为3.0%(质量分数)时达到28.7 L/(m2·h),为最大;0.2 MPa下,过滤1.7 g/L 硫酸钙时对 Ca2+和 SO 2-4的截留率分别为83%和92%,稳定通量达到21.7 L/(m2·h).
以尿素為緻孔劑製備瞭海藻痠鈣(CA)水凝膠過濾膜,測試瞭其通量、截留率和力學性能;通過掃描電子顯微鏡(SEM)觀測其過濾硫痠鈣前後的錶麵形貌.結果錶明,增加尿素含量,均導緻膜應力和應變的下降;而膜的純水通量則迅速增大,尿素含量為3.0%(質量分數)時達到28.7 L/(m2·h),為最大;0.2 MPa下,過濾1.7 g/L 硫痠鈣時對 Ca2+和 SO 2-4的截留率分彆為83%和92%,穩定通量達到21.7 L/(m2·h).
이뇨소위치공제제비료해조산개(CA)수응효과려막,측시료기통량、절류솔화역학성능;통과소묘전자현미경(SEM)관측기과려류산개전후적표면형모.결과표명,증가뇨소함량,균도치막응력화응변적하강;이막적순수통량칙신속증대,뇨소함량위3.0%(질량분수)시체도28.7 L/(m2·h),위최대;0.2 MPa하,과려1.7 g/L 류산개시대 Ca2+화 SO 2-4적절류솔분별위83%화92%,은정통량체도21.7 L/(m2·h).
In this thesis,urea was used as a porogen to prepare calcium alginate (CA)hydrogel filtration mem-brane.The flux,retention and mechanical properties of the CA filtration membrane were tested.The surface morphology of CA filtration membrane before and after filtrating calcium sulphate was observed by scanning e-lectron microscopy (SEM).Results showed that the stress and strain of the membrane reduced with the increase of urea content.When the concentration of urea was less than 2.5wt%,the water flux of membrane increased rapidly with the increase of urea content.When the urea was 3.0wt%,the flux reached 28.7 L/(m2 ·h).With the continue increase of the urea amount the flux increased little.When the pressure was fixed at 0.2 MPa,the retention rate of Ca2 + and SO 2 -4 for the CA filtration membrane was 83% and 92%,respectively.And the stable flux reached 21.7 L/(m2 ·h).