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首页> 外文期刊>Journal of Applied Polymer Science >Field performance on lettuce crops of poly(butylene adipate-co-terephthalate)/polylactic acid as alternative biodegradable composites mulching films
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Field performance on lettuce crops of poly(butylene adipate-co-terephthalate)/polylactic acid as alternative biodegradable composites mulching films

机译：莴苣作物对聚（丁烯己二酸丁二醇酯）/聚乳酸作为替代生物降解复合材料覆盖薄膜的现场性能

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摘要

This work developed biodegradable poly(butylene adipate-co-terephthalate)/polylactic acid (PBAT/PLA) composites with different fillers to improve their physicochemical properties and biodegradability. The films were tested considering mechanical, morphological, thermal, crystalline, biodegradability, and ecotoxicity tests. Mechanical and morphological results indicated that the fillers' nature influences mechanical performance; all composites showed high-tensile strength (similar to 30 MPa) than the pristine films (similar to 12 MPa). The use of both fillers resulted in an interface, improving the matrix compatibility, reflecting in good thermal performance, low-water absorption, and high hydrophobicity. The WA (water absorption) and hydrophobicity are essential to maintain the crop's moisture since the water lost through plant transpiration will be condensed and returned to the soil. Films showed biodegradability and absence of toxicity, which allows the substitution of polyethylene commodity films as mulching films. Biodegradation and ecotoxicity tests indicate that the developed films are beneficial for lettuce crops and contribute to the development of seedlings.
机译：本研究开发了可生物降解的聚己二酸丁二醇酯-聚对苯二甲酸乙二醇酯/聚乳酸（PBAT/PLA）复合材料，以改善其理化性能和生物降解性。对薄膜进行了机械、形态、热、结晶、生物降解性和生态毒性测试。力学和形态学结果表明，填料的性质影响其力学性能；所有复合材料的拉伸强度（类似于30MPa）均高于原始薄膜（类似于12MPa）。这两种填料的使用形成了界面，改善了基体相容性，反映出良好的热性能、低吸水性和高疏水性。WA（吸水率）和疏水性对于保持作物水分至关重要，因为通过植物蒸腾作用损失的水分将被浓缩并返回土壤。薄膜显示出生物降解性和无毒性，因此可以替代聚乙烯商品薄膜作为地膜。生物降解和生态毒性试验表明，开发的薄膜对莴苣作物有益，有助于幼苗的发育。

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