Zhang Zhao, Argenziano Rita, Konate Adama, Shi Xiangru, Salazar Sarai Agustin, Cerruti Pierfrancesco, Panzella Lucia, Terrasson Vincent, Guénin Erwann
Université de Technologie de Compiègne, ESCOM, TIMR (Integrated Transformations of Renewable Matter), Centre de Recherche Royallieu-CS 60 319-60 203, Compiègne Cedex, France.
Department of Chemical Sciences, University of Naples "Federico II", Via Cintia 4, I-80126 Naples, Italy.
Int J Biol Macromol. 2025 Mar;293:139079. doi: 10.1016/j.ijbiomac.2024.139079. Epub 2024 Dec 30.
Chitosan (CH)-based composite films have attracted increasing attention as promising green food packaging materials due to their biodegradability and ease of fabrication. Additionally, lignin (LN) has been widely used as additive for chitosan-based films to improve their physicochemical properties. In this study, a series of composite films made of chitosan nanoparticles (NCH) as a matrix and alkali lignin nanoparticles (LNPs) as functional filler were prepared. The NCH-LNPs composite films exhibited a more uniform appearance and enhanced crystallinity compared to NCH-LN films. The maximum pyrolysis temperature of NCH-LNPs films, determined by TG, reached 309 °C. Moreover, the antioxidant capacity of NCH-LNPs film was 1.5 and 3.4 times higher than those of NCH-LN and NCH films, respectively. The tensile modulus of NCH-LNPs films increased by 8.9 % and 36.5 %, while the tensile strain decreased by 16.0 % and 52.8 % compared to NCH and NCH-LN films, respectively. Finally, the suitability of prepared films for food preservation was studied on grape and cheese samples. The ability of NCH-LNPs films to inhibit lipid peroxidation in cheese was 2 times higher than that of NCH-LN films. These results showed that the improvement of physicochemical properties of NCH-based films by LNPs was significantly higher than that observed with LN.
基于壳聚糖（CH）的复合薄膜因其生物可降解性和易于制备，作为有前景的绿色食品包装材料受到了越来越多的关注。此外，木质素（LN）已被广泛用作壳聚糖基薄膜的添加剂，以改善其物理化学性质。在本研究中，制备了一系列以壳聚糖纳米颗粒（NCH）为基质、碱木质素纳米颗粒（LNPs）为功能填料的复合薄膜。与NCH-LN薄膜相比，NCH-LNPs复合薄膜呈现出更均匀的外观且结晶度增强。通过热重分析（TG）测定，NCH-LNPs薄膜的最大热解温度达到309℃。此外，NCH-LNPs薄膜的抗氧化能力分别比NCH-LN薄膜和NCH薄膜高1.5倍和3.4倍。与NCH薄膜和NCH-LN薄膜相比，NCH-LNPs薄膜的拉伸模量分别提高了8.9%和36.5%，而拉伸应变分别降低了16.0%和52.8%。最后，在葡萄和奶酪样品上研究了制备薄膜用于食品保鲜的适用性。NCH-LNPs薄膜抑制奶酪中脂质过氧化的能力比NCH-LN薄膜高2倍。这些结果表明，LNPs对基于NCH的薄膜物理化学性质的改善显著高于LN。
