Converting poplar sawdust waste into antioxidant lignocellulose film

IF 4.1 4区工程技术 Q3 ENERGY & FUELS

Biomass Conversion and Biorefinery Pub Date : 2025-04-07 DOI:10.1007/s13399-025-06828-7

Yali Tang, Kunqiang Lu, Lixin Lu, Xiaolin Qiu, Liao Pan

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Abstract

Alkali lignin (AL) exhibits favorable ultraviolet (UV)-shielding performance, yet its poor antioxidant activity significantly restricts practical applications in packaging materials. In this study, AL with high antioxidant and UV-shielding effects was prepared from renewable poplar sawdust by preheating with dilute acid and ultrasonication, and it was used as a filler to be added to regenerated cellulose (RC) matrix to prepare a new high-performance bioactive packaging film (RC-AL). Results demonstrated that AL (5–10%) incorporation endowed RC films with near-complete (100%) UV-shielding in the 200–300 nm range. The RC-AL film containing 10% AL achieved a 93.2% 1,1-diphenyl- 2-trinitrophenylhydrazine (DPPH) radical removal rate. Oxygen barrier properties remained stable with AL addition, while maximum moisture barrier enhancement (33.3%) occurred at 7.5% AL loading. Optimal mechanical performance was observed at 5% AL content (68.8 Mpa), showing a 35.7% increase in tensile strength (TS) and 38.4% reduction in elongation at break (EB). This work successfully converts renewable poplar waste into value-added bio-composite films, providing an attractive route to environmental sustainability for agroforestry by-products.

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杨木木屑废弃物转化为抗氧化木质纤维素膜

碱木质素（AL）具有良好的紫外线屏蔽性能，但其较差的抗氧化活性极大地限制了其在包装材料中的实际应用。本研究以再生杨木木屑为原料，经稀酸预热和超声处理制备了具有高抗氧化和紫外线屏蔽作用的AL，并将其作为填料添加到再生纤维素（RC）基质中，制备了一种新型高性能生物活性包装膜（RC-AL）。结果表明，AL（5-10%）的掺入使RC膜在200-300 nm范围内具有接近完全（100%）的紫外线屏蔽作用。含10% AL的RC-AL膜对1,1-二苯基- 2-三硝基苯肼（DPPH）自由基的去除率为93.2%。添加AL后，材料的氧阻隔性能保持稳定，而7.5% AL时，材料的防潮性能增强最大，达到33.3%。当AL含量为5% （68.8 Mpa）时，拉伸强度（TS）提高35.7%，断裂伸长率（EB）降低38.4%，力学性能最佳。这项工作成功地将可再生的杨树废物转化为增值的生物复合薄膜，为农林业副产品的环境可持续性提供了一条有吸引力的途径。

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来源期刊

Biomass Conversion and Biorefinery Energy-Renewable Energy, Sustainability and the Environment

CiteScore

7.00

自引率

15.00%

发文量

1358

期刊介绍： Biomass Conversion and Biorefinery presents articles and information on research, development and applications in thermo-chemical conversion; physico-chemical conversion and bio-chemical conversion, including all necessary steps for the provision and preparation of the biomass as well as all possible downstream processing steps for the environmentally sound and economically viable provision of energy and chemical products.