The study aims to investigate the effect of the different lignocellulosic pulp on the composite properties for active packaging application. Microfibrillated cellulose from bleached and unbleached Kraft and thermomechanical pulp (TMP) having different cellulose, hemicellulose, lignin, and extractive content were used as the matrix phase with antimicrobial bis-phosphinato bismuth complex as the dispersed phase. The Kraft pulp has thinner fibres as observed in the SEM images and have higher aspect ratio (EMT 109–157) compared to TMP (EMT 43–51). So, it is more easily fibrillated resulting in a strong close network and therefore resulting in low water vapor transmission rate (WVTR) and high tensile index (20–91 g/m².day and 59–78 Nm/g respectively) compared to the TMP ones (153–261 g/m².day and 35–43 Nm/g respectively). While the physical dimension of the fibres controls the mechanical and barrier properties, the leaching and antibacterial performance is related to the bonding of the complex with the matrix. The high hydrophilicity of the bleached kraft pulp results in a weak bond with the hydrophobic bismuth complex, easing its release to kill the surrounding microbial population and thus resulting in larger zones of inhibition against both Gram-positive and Gram-negative bacteria. Therefore, bleached kraft pulp was found to be the most suitable with promising barrier, mechanical and antibacterial properties.

本研究旨在研究不同木质纤维素纸浆对活性包装应用复合材料性能的影响。来自漂白和未漂白牛皮纸的微原纤化纤维素和具有不同纤维素、半纤维素、木质素和萃取物含量的热机械纸浆 (TMP) 用作基质相，抗菌双膦酸铋配合物作为分散相。与 TMP (EMT 43-51) 相比，牛皮纸浆具有更细的纤维，如 SEM 图像所示，并且具有更高的纵横比 (EMT 109-157)。因此，它更容易原纤化，从而形成牢固的紧密网络，从而导致低水蒸气透过率 (WVTR) 和高拉伸指数（分别为 20-91 g/m ² .day 和 59-78 Nm/g） TMP 的（153–261 g/m²天和 35–43 Nm/g）。虽然纤维的物理尺寸控制着机械和阻隔性能，但浸出和抗菌性能与复合物与基质的结合有关。漂白牛皮纸浆的高亲水性导致与疏水性铋复合物的结合较弱，从而使其释放以杀死周围的微生物群，从而导致对革兰氏阳性和革兰氏阴性细菌的抑制区域更大。因此，漂白牛皮纸浆被发现是最合适的，具有良好的阻隔、机械和抗菌性能。