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适用于制备可控释放肥料的涂料材料的疏水性和机械性能的推值
Yajing Wang1, Juan Li1, Ru Lin1
1State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China/Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture and Rural Affairs/the Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Polymers
|December 23, 2023
概括
对控制释放肥料 (CRF) 的涂层进行了释放分析. 涂料的疏水性和机械性质直接影响营养释放周期,使得量身定制的肥料设计成为可能.
科学领域:
- 农业科学 农业科学
- 材料科学 材料科学 材料科学
- 土壤科学 土壤科学
背景情况:
- 控制释放肥料 (CRF) 对于农业中有效的营养供应至关重要.
- 从CRF中优化 (N) 释放率对于作物营养和环境保护至关重要.
- 涂层材料的特性对CRF的性能有很大的影响.
研究的目的:
- 调查涂料材料特性与CRF释放率之间的关系.
- 建立设计具有特定营养释放持续时间的CRF的定量标准.
- 评估改性硫涂化肥 (MSCFs) 对于实现目标释放的潜力.
主要方法:
- 确定涂料材料的疏水性 (吸水性,WA;水接触角度,WCA) 和机械性质 (破裂时的延长,EB).
- 随着时间的推移,从11种CRF中测量 (N) 释放率.
- 开发了数学模型,以将涂层特性与N个释放周期相关联.
主要成果:
- 释放周期与WA (r=0.986) 呈现负相关性,与WCA (r=0.701) 和EB (r=0.737) 呈现正相关性.
- 在30天N释放期内,确定了WA (<2.4%),WCA (>68.8°) 和EB (>57.7%) 的特定值.
- 推30天释放期的目标值为WA<3.0%,WCA>60.0°,EB>30.0%.
结论:
- 涂层材料的疏水性和机械强度是CRF营养释放时间的关键决定因素.
- 该研究提供了一个功能方程和推值,用于设计具有量身定制的N释放配置文件的CRF.
- 提高MSCFs的机械性能可以实现30天的N释放目标,为定制作物营养提供潜力.
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