合成和表征的双网珠基于酸接种的聚烯胺作为,和营养物质的载体
Salma Elamiri1, Soumia Aboul-Hrouz2, Younes Essamlali2
1Laboratory of Materials, Catalysis & Natural Resources Valorization, URAC 24, Faculty of Science and Technology, Hassan II University, B.P. 146, Casablanca, Morocco.
International journal of biological macromolecules
|February 6, 2025
概括
研究人员使用藻酸盐和聚烯胺开发了新的缓释肥料珠. 这些环保的珠子提供延迟的营养释放,减少现代农业对环境的影响.
科学领域:
- 农业科学 农业科学
- 聚合物科学 聚合物科学
- 环境科学 环境科学
背景情况:
- 传统的水溶性肥料导致营养损失,水污染和温室气体排放.
- 缓释肥料是缓解这些农业问题的新兴替代品.
研究的目的:
- 为了制定和描述基于酸盐的新型缓释NPK肥料珠.
- 评估制造的珠子在水和土壤中的营养释放概况和动力学.
主要方法:
- 使用藻酸盐,聚烯胺,NPK肥料和离子制成五种富含NPK的缓释珠.
- 使用FTIR,XRD和SEM进行表征.
- 评估水和沙粘土土中的膨胀能力和营养释放.
主要成果:
- 与传统肥料相比,这些珠子的营养释放延迟.
- 增加的聚烯胺接种百分比减缓了营养释放,其中20%的重量%显示长寿.
- 在水和土壤中,,和的释放遵循非Fickian扩散动力学.
结论:
- 开发的藻酸盐-移植-聚烯胺肥料珠是水溶性肥料的有希望的环保替代品.
- 控制释放机制提高了营养使用效率,减少了环境污染.
- 这一创新支持现代农业的可持续实践.
相关概念视频
01:20Anionic Chain-Growth Polymerization: Overview
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
01:04Anionic Chain-Growth Polymerization: Mechanism
The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael acceptor.