Paper made of cellulose has the advantages of substantial resource, good biocompatibility, large operation scale, and low production cost, however, it is usually hindered to replace plastic due to its inferior stability to water and poor mechanical strength. Herein, commercial filter paper (FP) was reacted with methylene diphenyl diisocyanate (MDI) to fabricate modified paper with tunable hydrophobicity and enhanced wet tensile strength. Due to the formation of urethane linkages in the reaction, both hydrophobicity and wet mechanical properties can be tuned and improved by varying the MDI cross-linking agent, exhibiting highest water contact angle of 137.0° and wet tensile strength of 4.8 MPa. In addition, the modified MDI-FPs exhibited excellent antibacterial performance against Escherichia coli compared with the original FP. Overall, this study provides a more simple approach to modify cellulose paper to produce versatile cellulose-based materials that can potentially replace the non-biodegradable plastics.

由纤维素制成的纸具有资源丰富，生物相容性好，操作规模大和生产成本低的优点，但是由于其对水的稳定性差且机械强度差，因此通常难以代替塑料。在此，使商品滤纸（FP）与亚甲基二苯基二异氰酸酯（MDI）反应，以制备具有可调的疏水性和增强的湿拉伸强度的改性纸。由于在反应中形成了氨基甲酸酯键，因此可以通过改变MDI交联剂来调节和改善疏水性和湿机械性能，它们的最大水接触角为137.0°，湿拉伸强度为4.8 MPa。另外，改性的MDI-FP对大肠杆菌表现出优异的抗菌性能。与原始FP相比。总的来说，这项研究提供了一种更简单的方法来改性纤维素纸，以生产通用的纤维素基材料，从而有可能取代不可生物降解的塑料。