为改善PTFE中空纤维膜表面亲水性能，扩大其在污水处理领域中的运用，采用含有磺酸基、氨基、羟基、醛基、羧基的溶液浸渍预处理，利用低温等离子体法对PTFE中空纤维膜进行表面亲水改性。SEM、ATR-FTIR分析结果表明，PTFE中空纤维膜经过不同亲水基团改性后，磺酸基、氨基、羟基、醛基、羧基成功地接枝到PTFE膜表面。改性后的PTFE中空纤维膜的接触角和出水渗透压有较大幅度下降，其中经羧基改性后的PTFE中空纤维膜接触角最低下降为52°，出水渗透压下降为0.18 MPa。5种亲水基团中，改性PTFE中空纤维膜最佳的亲水基团为羧基，最佳的预处理溶液为丙烯酸。

To improve the hydrophilicity of polytetrafluoroethylene (PTFE) hollow fiber membrane and promote its use in the field of waste water treatment, PTFE hollow fiber membrane is at first pretreated by dipping in the solution containing sulfonic group, amino group, hydroxy group, aldehyde group and carboxy group, then modified into ones with hydrophilic surfaces by low temperature plasma method. The results from SEM and ATR-FTIR analysis show that after modification by different hydrophilic groups, the related group is successfully grafted onto the surface of PTFE membrane. Both the contact angle and water effluent osmotic pressure of the modified PTFE hollow fiber membrane decrease greatly than that before modification. The contact angle of the PTFE hollow fiber membrane modified by carboxyl is the lowest, dropping to 52°, and the water effluent osmotic pressure decreases to 0.18 MPa. Among the five hydrophilic groups, carboxyl is the best hydrophilic group for modifying PTFE hollow fiber membrane, and acrylic acid containing solution is the best pretreatment solution.

张浩凡(1992-),男,硕士研究生,主要从事环境功能材料的研究与应用,scuzhf@126.com。