Lai Mingxiu, Zhao Lihong, Ren Junli, Li Kunpeng
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510000, China.
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510000, China.
Int J Biol Macromol. 2025 Aug;320(Pt 4):145942. doi: 10.1016/j.ijbiomac.2025.145942. Epub 2025 Jul 11.
The development of bioplastics with enhanced toughness, which effectively combine ductility and strength from renewable biomass resources, continues to pose a significant challenge. In this study, regenerated cellulose was combined with non-toxic and non-irritating bio-molecular phenolic acids, specifically hydroxybenzoic acid, 3,4-dihydroxybenzoic acid, and gallic acid, to fabricate robust films. The composite film (C-HBA) formulated with 15 wt% hydroxybenzoic acid demonstrated a notable tensile elongation at break of approximately 56 % and a substantial tensile strength of approximately 123 MPa, achieving a toughness value of 47.79 MJ/m. Characterization results obtained from infrared spectroscopy and X-ray photoelectron spectroscopy revealed that phenolic acids competed with cellulose chains for self-assembly, thereby introducing a novel hydrogen bond network that enhanced the mechanical properties of the films. These films, derived from non-toxic biomass resources, exhibit significant potential for applications in sectors such as food, pharmaceuticals, and agriculture.
开发具有增强韧性的生物塑料仍然是一项重大挑战，这种生物塑料要能有效地将可再生生物质资源的延展性和强度结合起来。在本研究中，将再生纤维素与无毒且无刺激性的生物分子酚酸（特别是羟基苯甲酸、3,4-二羟基苯甲酸和没食子酸）相结合，以制备坚固的薄膜。由15 wt%羟基苯甲酸配制的复合薄膜（C-HBA）表现出约56%的显著断裂伸长率和约123 MPa的高强度拉伸强度，韧性值达到47.79 MJ/m³。红外光谱和X射线光电子能谱的表征结果表明，酚酸与纤维素链竞争进行自组装，从而引入了一种新型氢键网络，增强了薄膜的机械性能。这些由无毒生物质资源制成的薄膜在食品、制药和农业等领域具有巨大的应用潜力。
