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发表时间：2022-10-09
发表刊物：功能材料
期号：19
页面范围：19028-19032
ISSN号：1001-9731
摘要：Hydrophobic Al2 O 3 ceramic membranes were prepared through surface graft modification with dime-thyldichlorosilane as a modifying agent,and then applied to air gap membrane distillation of NaCl solutions. Modified ceramic membranes were characterized with FT-IR,contact angle analyzer and SEM.Results show that the modifying agent was successfully grafted on the membrane surface;the modified membranes have a very good hydrophobic characteristic;and no significant changes are observed in surface morphologies and pore sizes of the membranes before and after grafting.The LEP of the modified membranes was measured to be 0.1 1 MPa.Membrane distillation results show that permeate fluxes increase with the increases in solution tempera-ture and flow rate,but decrease with the increase in solution concentration;the solution temperature was the major factor affecting the membrane distillation;over 98.53% of NaCl rejection rate was achieved in each run of experiments.Research results demonstrate that the prepared ceramic membranes modified with the dimethyldi-chlorosilane can be sufficiently used in the membrane distillation of NaCl solutions.
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