■尿素是农民广泛使用的肥料,尤其是菜农,由于其高氮含量,约46%。然而,植物只使用少量的氮,最高35%,而剩余的氮被浪费并释放到环境中。不可否认,它增加了生产成本和环境问题。为了解决这些问题,已经制定了缓释尿素肥料(SRF)。
■在这项研究中,膜由壳聚糖与三聚磷酸盐(TPP)等几种交联剂制成。此外,钙离子键有望通过包封过程增加与尿素肥料的相互作用。
■我们的数据表明,尿素缓释肥料(SRF)与壳聚糖/TPP/Ca膜,成功合成。该膜具有透明的薄白色层的特征。具有各种涂层膜变化的SRF膜的物理和化学表征表明,壳聚糖/TPP/钙尿素膜的杨氏模量为7.75-22.05N/mm2,溶胀率为109.52-132.62%,孔隙率为0.756-1.06%。官能团分析表明,几种光谱变化表明壳聚糖官能团与TPP之间存在交联过程。尿素释放结果表明,膜是通过扩散机制释放的。此外,SEM结果表明,这些膜具有各种形状和尺寸的孔。
■根据结果,可以得出结论,添加TPP和氧化钙的壳聚糖膜改性提供了改善的膜特性cs包括发展程度,疏水性,膜应力,和氮在膜上的释放。该膜表明适合作为缓释肥料。
UNASSIGNED: Urea is a fertilizer widely used by farmers, especially vegetable farmers, due to its high nitrogen content, around 46 %. However, plants only use a small amount of nitrogen, a maximum of 35 %, while the remaining nitrogen is wasted and released into the environment. Undeniably, it causes increases production costs and environmental problems. A slow-release urea fertilizer (SRF) has been formulated to resolve these issues.
UNASSIGNED: In this study, the membrane was made of chitosan with several crosslinking agents such as Tripolyphosphate (TPP). In addition, calcium ion bonds are expected to increase the interaction with urea fertilizer through the encapsulation process.
UNASSIGNED: Our data showed that urea slow-release fertilizer (SRF) with the chitosan/TPP/Ca membrane, was successfully synthesized. This
membrane has the characteristics of a thin white layer that is transparent. The physical and chemical characterization of SRF membranes with various coating
membrane variations showed that the chitosan/TPP/Ca-urea membrane has Young\'s modulus of 7.75-22.05 N/mm2, swelling of 109.52-132.62 % and porosity of 0.756-1.06 %. Functional group analysis shows that several spectral changes indicate the presence of crosslinking process between the chitosan functional groups and TPP. The urea release results show that the
membrane is released through a diffusion mechanism. Furthermore, SEM results show that these membranes have pores with various shapes and sizes.
UNASSIGNED: Based on the result, it can be concluded that chitosan membrane modification with the addition of TPP and calcium oxide provides improved membrane characteristic cs including degree of development, hydrophobicity,
membrane stress, and nitrogen release on the
membrane. This
membrane shows is indicating suitability as a slow-release fertilizer.