A new facile, cost-effective and safe approach is introduced for the modification of polyacrylonitrile (PAN) membrane surface by a polymerization process in order to improve hydrophilicity and antifouling. For this purpose, membrane activated by IR-initiated, and acrylic acid (AA) as a monomer was successfully grafted on the membrane surface. The surface properties of membranes were characterized by means of various techniques: infrared spectroscopy, zeta potential, water contact angle, atomic force microscopy (AFM), and scanning electron microscopy (SEM). The experimental results indicate that the membrane surface becomes more hydrophilic by reducing the contact angle from 67.1° to 52.5°. The existence of hydrophilic chains on the membrane surface facilitates the creation of a negative charge on the membrane surface unto −2.99 mV (from 3.51 mV in based-membrane). The separation performance of the modified membrane showed a desirable yield. For a membrane photografted for 25 min with acrylic acid solution (2 wt%), the retention of Na₂SO₄, MgSO₄, NaCl, and CaCl₂ was in the order of 81%, 67%, 34%, and 28%, respectively. The membrane retention is expressed the values of 90.37%, 87.17%, and 79.5% for Acid Blue 92, Acid Red 114, and Ibuprofen. The optimized NF membrane showed a permeability factor (Lp) of 6.48 L·m⁻²·h⁻¹·bar⁻¹. Furthermore, the surface modification of the PAN membrane via the IR-induced graft polymerization exhibits an enhancement of the membrane antifouling property.

引入了一种新的简便、经济且安全的方法，用于通过聚合工艺对聚丙烯腈 (PAN) 膜表面进行改性，以提高亲水性和防污性。为此，通过IR引发活化的膜和作为单体的丙烯酸（AA）成功接枝在膜表面上。膜的表面性质通过各种技术表征：红外光谱、zeta 电位、水接触角、原子力显微镜 (AFM) 和扫描电子显微镜 (SEM)。实验结果表明，通过将接触角从 67.1° 降低到 52.5°，膜表面变得更加亲水。膜表面亲水链的存在有利于在膜表面产生负电荷至 -2.99 mV（从 3. 51 mV 在基膜中）。改性膜的分离性能表现出理想的收率。对于用丙烯酸溶液（2 wt%）光接枝 25 分钟的膜，Na 的保留₂ SO ₄、MgSO ₄、NaCl和CaCl ₂分别为81%、67%、34%和28%。酸性蓝 92、酸性红 114 和布洛芬的膜保留值分别表示为 90.37%、87.17% 和 79.5%。^{优化的NF膜显示出6.48 L·m -2} ·h ^-1 ·bar ^-1的渗透因子(Lp) 。此外，通过 IR 诱导的接枝聚合对 PAN 膜进行表面改性，提高了膜的防污性能。