Iftime Manuela Maria, Irimiciuc Stefan Andrei, Agop Maricel, Angheloiu Marian, Ochiuz Lacramioara, Vasincu Decebal
Romanian Academy of Sciences, Petru Poni Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania.
National Institute for Laser, Plasma and Radiation Physics-NILPRP, 409 Atomistilor Street, 077125 Bucharest, Romania.
Polymers (Basel). 2020 Jun 1;12(6):1264. doi: 10.3390/polym12061264.
This paper reports the calibration of a theoretical multifractal model based on empirical data on the urea release from a series of soil conditioner systems. To do this, a series of formulations was prepared by in situ hydrogelation of chitosan with salicylaldehyde in the presence of different urea amounts. The formulations were morphologically characterized by scanning electron microscopy and polarized light microscopy. The in vitro urea release was investigated in an environmentally simulated medium. The release data were fitted on five different mathematical models, Korsmeyer-Peppas, Zero order, First order, Higuchi and Hixson-Crowell, which allowed the establishment of a mechanism of urea release. Furthermore, a multifractal model, used for the fertilizer release for the first time, was calibrated using these empirical data. The resulting fit was in good agreement with the experimental data, validating the multifractal theoretical model.
本文报道了基于一系列土壤改良剂体系中尿素释放的经验数据对理论多重分形模型的校准。为此，在不同尿素量存在的情况下，通过壳聚糖与水杨醛的原位水凝胶化制备了一系列配方。通过扫描电子显微镜和偏光显微镜对配方进行形态表征。在环境模拟介质中研究了体外尿素释放。将释放数据拟合到五个不同的数学模型上，即Korsmeyer-Peppas模型、零级模型、一级模型、Higuchi模型和Hixson-Crowell模型，这有助于建立尿素释放机制。此外，首次将用于肥料释放的多重分形模型用这些经验数据进行校准。所得拟合结果与实验数据吻合良好，验证了多重分形理论模型。
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