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首页> 外文期刊>Journal of Polymers and the Environment >Lignin-Based Polyethylene Films with Enhanced Thermal, Opacity and Biodegradability Properties for Agricultural Mulch Applications
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Lignin-Based Polyethylene Films with Enhanced Thermal, Opacity and Biodegradability Properties for Agricultural Mulch Applications

机译：基于木质素的聚乙烯薄膜，具有增强的用于农业覆盖应用的热，不透明度和生物降解性性能

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摘要

Lignins are promising alternative raw materials for biocomposites due to their renewability, low cost and abundance. In this work, the use of (softwood and hardwood) Kraft lignins in the development of LLDPE/lignin films for agricultural mulch applications is studied. Processable blends were obtained from unmodified softwood lignin (SW) and from hardwood lignin modified by esterification (HWE). LLDPE was pelletized with (2.5%, 5% and 10%) lignin with particle size between 38 and 75 mu m and flexible films were blown extruded. Processable extrusion blends showed temperature differences lower than 20 degrees C between the Tg of lignin and the melting temperature of LLPDE. Films from neat LLPDE and with 2.5% of HWE and up to 5% SW exhibited statistically comparable ( approximately equal to 349%) values of ductility. Ester groups present in lignin improve weight loss of lignin-based blends after soil buried test.
机译：由于其可再生性，低成本和丰度，Lignins是用于生物复合材料的替代原料。在这项工作中，研究了使用（软木和硬木）牛皮纸在发育农业覆盖应用的LLDPE /木质素薄膜中。可加工混合是从未修饰的软木木质素（SW）和由酯化（HWE）改性的硬木木质素获得。 LLDPE用（2.5％，5％和10％）木质素颗粒，粒径为38至75μm，吹出柔性薄膜。可加工的挤出共混物在木质素的Tg和LLPDE的熔化温度之间显示出低于20摄氏度的温度差异。来自整齐LLPDE的薄膜和2.5％的HWE和高达5％的SW表现出统计上可比的（大约等于349％）的延展性值。在土壤埋藏试验后，木质素中存在的酯群提高了基于木质素的共混物的体重减轻。

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