PLA/starch biodegradable fibers obtained by the electrospinning method for micronutrient mineral release

IF 1.4 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY AIMS Materials Science Pub Date : 2023-01-01 DOI:10.3934/matersci.2023011
J. Malafatti, Thamara Machado de Oliveira Ruellas, C. R. Sciena, E. Paris
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引用次数: 3

Abstract

Developments in nanofibers seek to increasingly expand the field of support and release of actives, such as fertilizers. Using nanofibers as materials for mineral nutrients aims to increase the efficiency of contact release of the fertilizer to the plant root in the soil. Poly lactic acid (PLA) is a polymer with biocompatibility characteristics and spinning conditions. The starch biopolymer combined with PLA can improve the biodegradation properties and hydrophilicity of the fibers and allow the solubilization of the fertilizer source for the plant. Thus, the present paper sought to find a polymeric matrix in the form of PLA/starch nanofibers that could act in the release of the mineral micronutrient manganese as a model asset. The electrospinning method was employed to obtain the fibers varying the starch concentration from 10 to 50% (w/w) in the polymeric matrix. The nanocomposite containing manganese carbonate as a source of Mn2+ ions was produced from the best membrane composition. The results showed that the analyzed PLA/starch blends with 20% (w/w) provided better fiber affinity with water, which is fundamental for fiber degradation time. Regarding fertilizer release, the starch present in the PLA fiber at a concentration of 20% (m/m) promoted better control in the release of Mn2+. The total release occurred after 5 d in contact with the 2% citric acid extractive medium. Thus, PLA/starch fiber becomes an alternative in the packaging of particulate fertilizers, providing increased contact area during root application with gradual delivery of mineral nutrients and minimizing loss by leaching.
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静电纺丝法制备PLA/淀粉生物可降解纤维,用于微量营养素矿物释放
纳米纤维的发展寻求越来越多地扩展支持和释放活性物质的领域,如肥料。利用纳米纤维作为矿质养分的材料,旨在提高土壤中肥料向植物根系接触释放的效率。聚乳酸(PLA)是一种具有生物相容性和纺丝条件的聚合物。淀粉生物聚合物与聚乳酸的结合可以提高纤维的生物降解性能和亲水性,并为植物提供增溶肥料源。因此,本文试图找到一种聚乳酸/淀粉纳米纤维形式的聚合物基质,它可以作为模型资产在矿物质微量营养素锰的释放中起作用。采用静电纺丝法制备了淀粉浓度为10% ~ 50% (w/w)的聚合物纤维。采用最佳膜组分制备了以碳酸锰为锰离子源的纳米复合材料。结果表明,20% (w/w)的PLA/淀粉共混物具有较好的纤维亲水性,这是延长纤维降解时间的基础。在肥料释放方面,PLA纤维中淀粉浓度为20% (m/m)时,对Mn2+的释放有较好的控制作用。与2%柠檬酸萃取剂接触5 d后,总释放量达到100%。因此,聚乳酸/淀粉纤维成为颗粒肥料包装的替代品,在根施用过程中提供更大的接触面积,逐渐输送矿物质营养,并最大限度地减少浸出损失。
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来源期刊
AIMS Materials Science
AIMS Materials Science MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
3.60
自引率
0.00%
发文量
33
审稿时长
4 weeks
期刊介绍: AIMS Materials Science welcomes, but not limited to, the papers from the following topics: · Biological materials · Ceramics · Composite materials · Magnetic materials · Medical implant materials · New properties of materials · Nanoscience and nanotechnology · Polymers · Thin films.
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