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

淀粉 静电纺丝 纳米纤维 化学工程 生物高聚物 材料科学 化学 控制释放 核化学 聚合物 有机化学 复合材料 纳米技术 工程类
作者
João Otávio Donizette Malafatti,Thamara Machado de Oliveira Ruellas,Camila Rodrigues Sciena,Elaine Cristina Paris
出处
期刊:AIMS materials science [AIMS Press]
卷期号:10 (2): 200-212 被引量:10
标识
DOI:10.3934/matersci.2023011
摘要

<abstract> <p>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 Mn<sup>2+</sup> 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 Mn<sup>2+</sup>. 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.</p> </abstract>
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