偏高岭土基地质聚合物自支撑无机膜制备及表征

摘要

Geopolymer inorganic membrane was synthesised using metakaolin,water,and water-glass according to a mixing ratio model (SiO2/Na2O=1.3,Na2O/Al2O3=0.8,SiO2/Al2O3=2.96 and H2O/Na2O=19). After mechanical stirring,the geopolymer slurry was cast in a circular mould with the diameter of 40mm,cured at 60℃for 24 h and then demoulded. Geopolymer-based inorganic membrane formed a homogenous structure and had a narrow pore size distribution from about 11.88-26.82 nm. Scanning electron microscopy (SEM),ultraviolet spectrophotometer,compressive strength test and water flux test characterized various properties of the geopolymer-based inorganic membrane. The geopolymer-based inorganic membrane has shown greater potential than the organic membrane for application in wastewater treatment due to its stability and narrow pore size distribution.%采用传统注浆法,以工业级水玻璃为碱激发剂,偏高岭土以及水为原料,以理论摩尔配比(SiO2/Na2O=1.3,Na2O/Al2O3=0.8,SiO2/Al2O3=2.96,H2O/Na2O=19)混合后经机械搅拌均匀制备得到地质聚合物浆料,注浆在直径为40 mm的圆形模具中,60 ℃条件下养护24 h后脱模即可得到平均孔径范围为11.88-26.82 nm的地聚物片式无机膜.研究采用扫描电镜(SEM)、紫外分光光度计、抗压强度测试、水通量测试等对地质聚合物自支撑无机膜的各项性能进行表征,由于地质聚合物自支撑无机膜具有良好的稳定性和较窄的孔径分布,使其在废水处理中表现出比有机膜更大的潜力.