College of Textile Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China.
State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, 135 Ya Guan Road, Jinnan District, Tianjin 300350, China.
Int J Biol Macromol. 2024 Jun;271(Pt 1):132498. doi: 10.1016/j.ijbiomac.2024.132498. Epub 2024 May 17.
The development of a thermoplastic, biodegradable composite material to replace conventional polymers derived from petroleum was the main area of concentration. Herein, a method for preparing antibacterial, UV-blocking and degradable CNF/Lignin/PBAT composite films (CLP) using cellulose nanofibrils (CNF), lignin, and Poly (butylene adipate-terephthalate) (PBAT) as raw materials by solution casting method was described. With the adding of PBAT, the thermal stability, thermoplastic, mechanical properties were enhanced by improving the compatibility between components. The maximum tensile strength of CLP could reach 189.72 MPa, which increased 25.5 % compared to CNF/Lignin film. The average initial decomposition temperature could reach 321 °C, which was much higher than that of CNF and lignin. At the same time, its good heat-sealing performance made it suitable for practical use. Meanwhile, the composite films had excellent UV resistance and could block over 95 % of UV light. The antibacterial results indicated that the films had a good inhibitory effect on E. coli and S. aureus, with a maximum inhibitory ring diameter of 5.56 and 6.36 mm. In addition, the composite film also had excellent barrier capability to liquid and gas. The prepared film had potential to produce flexible packing, industrial compositing and biomedical fields.
主要集中在开发一种热塑性、可生物降解的复合材料，以替代传统的石油衍生聚合物。本文采用纤维素纳米纤维（CNF）、木质素和聚对苯二酸丁二醇酯（PBAT）为原料，通过溶液浇铸法制备了具有抗菌、抗紫外线和可降解性能的 CNF/木质素/PBAT 复合膜（CLP）。随着 PBAT 的加入，通过提高各组分之间的相容性，改善了热稳定性、热塑性和力学性能。CLP 的最大拉伸强度可达 189.72 MPa，比 CNF/木质素膜提高了 25.5%。平均初始分解温度可达 321°C，远高于 CNF 和木质素。同时，其良好的热封性能使其适用于实际应用。此外，复合膜具有优异的抗紫外线性能，能阻挡超过 95%的紫外线。抗菌结果表明，该膜对大肠杆菌和金黄色葡萄球菌具有良好的抑制作用，最大抑菌环直径分别为 5.56 和 6.36 mm。此外，复合膜还具有优异的液体和气体阻隔性能。所制备的薄膜在柔性包装、工业复合材料和生物医学领域具有潜在的应用前景。
