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纤维素电荷和矩阵组成对KNO₃-营养素释放动力学和机制的作用

Débora França¹, Sahmira Bianchi^1,2, Roselena Faez^1,2

¹Laboratory of Polymeric Materials and Biosorbents, Universidade Federal São Carlos, UFSCar, Rod. Anhanguera, km 174, Araras, SP 13600970, Brazil.

|March 9, 2026

概括

这项研究研究了使用纤维素矩阵的增强效率肥料 (EEF) 释放的营养素. 调整纤维素电荷可以优化营养释放,从而实现可持续农业.

科学领域:

农业科学农业科学
材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.

背景情况:

全球日益增长的粮食需求需要再生农业的进步和提高效率的肥料 (EEF).
环境营养图旨在提高营养使用效率并最大限度地减少对环境的影响,因此需要对其释放机制有深入的了解.
基于纤维素的矩阵为开发新型EEF配方提供了一个可持续的平台.

研究的目的:

为了研究嵌入在基于纤维素的矩阵中的酸 (KNO3) 的营养释放动力学.
确定矩阵结构,粒子形成方法和纤维素纳米晶 (CNF) 电荷对释放机制的影响.
确定适合的数学模型来描述观察到的营养释放行为.

主要方法:

酸 (KNO3) 通过喷雾干燥和化处理被纳入基于纤维素的矩阵.
在水中分析了营养释放动态,使用数学模型,包括零顺序,第一顺序,Higuchi,Korsmeyer-Peppas,Peppas-Sahlin,Hixson-Crowell和Hopfenberg.
研究了正 (CNF+) 和负 (CNF-) 电荷的纤维素纳米晶体对释放动态的影响.

主要成果:

矩阵结构,粒子形成方法和CNF电荷显著影响了营养释放机制.
异常释放行为最好用Korsmeyer-Peppas和Peppas-Sahlin模型来描述.
离子 (K+) 的释放主要是扩散驱动的,而离子 (NO3-) 的释放则取决于矩阵放松,在CNF+和CNF-矩阵中观察到特定的行为.

结论:

从基于纤维素的EEF中释放的营养素是一个复杂的过程,受到矩阵特性和加工方法的影响.
纤维素纳米晶的电荷在区分K+和NO3-. 3的释放机制方面发挥着至关重要的作用.
定制CNF充电和矩阵组成为优化营养释放配置提供了一条途径,以提高肥料管理和农业可持续性.

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