Cellulosic materials show great superiority in oil/water separation owing to abundance, low cost, renewability and biodegradability. Herein, silylated cellulose graft copolymer (C-PGMA-S) was prepared by combing ATRP grafting of glycidyl methacrylate with ring-opening reaction between epoxy groups in grafted chains and amine groups in (3-Aminopropyl)- triethoxysilane. C-PGMA-S was utilized to construct hydrophobic surface for filter paper substrate conveniently through dipping and drying. As the curing proceeded, water contact angle of the modified paper increased from 77° to 128°. Inhomogeneous coverage on the pores and micro-scaled irregular concavities were observed by scanning electron microscopy (SEM) on modified paper, resulting in decreased porosity and increased roughness. Moreover, bursting strength was improved by 27%. An efficiency of 96.8% was achieved using the modified paper for oil/water separation. The modified paper exhibited moderate reusability with the separation efficiency remaining over 90% after reuse for 8 cycles without renewing process and good stability against pH variations. The C-PGMA-S modified filter paper, which is fluorine-free, might be a potential candidate for oil/water separation.

纤维素材料由于丰富、成本低、可再生和可生物降解，在油/水分离方面表现出极大的优势。在本文中，通过将甲基丙烯酸缩水甘油酯的 ATRP 接枝与接枝链中的环氧基与（3-氨基丙基）-三乙氧基硅烷中的胺基之间的开环反应相结合，制备了硅烷化纤维素接枝共聚物（C-PGMA-S）。利用C-PGMA-S通过浸渍和干燥方便地构建滤纸基材的疏水表面。随着固化的进行，改性纸的水接触角从77°增加到128°。通过扫描电子显微镜 (SEM) 在改性纸上观察到孔隙上的不均匀覆盖和微尺度不规则凹陷，导致孔隙率降低和粗糙度增加。此外，爆破强度提高了 27%。使用改性纸进行油水分离，效率达到 96.8%。改性纸具有中等重复使用性，重复使用8次循环后分离效率保持在90%以上，无需更新工艺，对pH变化具有良好的稳定性。不含氟的 C-PGMA-S 改性滤纸可能是油/水分离的潜在候选者。