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物理和化学交叉链接的聚乙烯醇/酸水凝用于农业应用

Ana V Torres-Figueroa¹, Sergio de Los Santos-Villalobos², Dora E Rodríguez-Félix¹

¹Departamento de Investigación en Polímeros y Materiales, Universidad de Sonora, Hermosillo 83000, Mexico.

|December 4, 2023

概括

聚乙醇 (PVA) /酸 (HA) 水凝的制备方法会影响它们的农业性能. 自化 (AC) 水凝更好地保持土壤水分,而甲基 (GA) 交联水凝可以促进植物生长.

科学领域:

材料科学材料科学材料科学
农业科学农业科学
聚合物化学聚合物化学

背景情况:

水凝的特性受到其制备方法的显著影响.
聚乙醇 (PVA) 和蜂酸 (HA) 水凝正在为农业应用进行探索.
控制水凝结构是优化土壤环境中的性能的关键.

研究的目的:

为了比较分析物理 (自化 - AC) 和化学 (甲 - GA) 交联的PVA/HA水凝的结构和物理化学特性.
评估这些水凝在保持土壤水分,植物生长和营养释放方面的性能.
确定制备方法对水凝适合特定农业需求的影响.

主要方法:

通过自 (AC) 和谷氨 (GA) 交联制备PVA/HA水凝.
使用富里埃变换红外光谱学,热重量测量分析,机械分析和扫描电子显微镜进行表征.
评估膨胀动力学,土壤中的水,植物毒性和尿素释放概况.

主要成果:

与GA水凝相比,AC水凝呈现出更均的多孔微观结构,更高的胀率和更好的土壤水分保留率.
这两种水凝类型在 * Sorghum sp. 上都没有表现出植物毒性. *,但GA交联的水凝促进了植物更快的生长.
尿素释放速度较慢的GA水凝 (56%在3天) 与AC水凝 (91%在3天).

结论:

制备方法批判性地决定了PVA/HA水凝的特性和农业用途.
交流水凝有利于土壤水分管理,而GA水凝更好地支持植物生长.
定制水凝制备方法允许定制材料特性,以满足特定的作物要求.

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