了解草基板培养块的干燥机制:物理化学特性,孔隙结构和干燥优化
Qian Cheng1, Zihui Liu1, Jiayi Sun1
1College of Engineering, Shenyang Agricultural University, Shenyang, 110866, China.
Heliyon
|May 10, 2024
概括
这项研究研究了农业废物基板块的干燥机制,这对植物生长至关重要. 当毛孔系数比率为40%时,最佳干燥发生,这表明理想的水分含量和毛孔结构对根部发育有好处.
科学领域:
- 农业科学 农业科学
- 材料科学 是一种材料科学.
- 干燥技术 干燥技术
背景情况:
- 农业废物块是一种新的基板,需要从湿状态开始干燥.
- 了解干燥机制对于优化基质利用至关重要.
研究的目的:
- 研究农业废物基板块的干燥机制.
- 描述毛孔结构及其对干燥的影响.
- 开发一种评估干燥质量的方法.
主要方法:
- 扫描电子显微镜 (SEM) 用于孔隙结构的表征.
- 孔道建模以分析多相介质分布.
- 测量干燥速度并将其分为阶段 (快速,恒定,慢速).
- 孔隙系数比率的开发,以量化孔隙空间变化.
主要成果:
- 内孔结构均,有利于植物根.
- 确定了四种主要的潮湿迁移途径.
- 确定的干燥阶段和水状态 (受限和自由).
- 在大约40% (20%-30%水分含量) 的孔系数比率下实现最佳干燥.
结论:
- 这项研究为建模基板孔状结构和了解干燥提供了理论基础.
- 孔系数比率是评估干燥质量的有效指标.
- 优化的干燥条件提高了基质适合植物生长的条件.
相关概念视频
01:21Drying Shrinkage
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When hardened concrete is exposed to air with a relative humidity of less than 100 percent, it begins to lose the free water within its capillaries. As this water evaporates, the water initially adsorbed onto the calcium silicate hydrates migrates towards these now empty spaces and eventually evaporates as well. Over time, as more water leaves, the volume of the concrete decreases, a phenomenon known as drying shrinkage.
A portion of this drying shrinkage can be reversed; if the concrete is...
A portion of this drying shrinkage can be reversed; if the concrete is...
78
01:20Porosity and Absorption of Aggregate
279
Aggregates contain pores of varying sizes; while some are completely enclosed within the particles, others open onto the surface, allowing water to penetrate. The porosity of aggregates is a major factor contributing to the overall porosity of concrete, given that aggregates constitute about three-quarters of concrete's volume.
When all pores in an aggregate are filled with water, the aggregate is considered saturated and surface-dry. If left in dry air, water will evaporate until the...
When all pores in an aggregate are filled with water, the aggregate is considered saturated and surface-dry. If left in dry air, water will evaporate until the...
279