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本文目的拟解决荒漠化地区土壤自涵养水分的问题。用分子化天然木蜡通过筛选的特种表面活性剂修饰土壤颗粒表面,将该颗粒构造于模拟沙漠气候的人工气候箱内的试验沙土表面,形成一层透气抑水的土膜,利用水分测定仪、差示热分析仪、X射线衍射、红外光谱等方法研究了该土膜的结构、保水机理和对草生长的影响。结果表明,采用山梨醇酐单硬脂酸酯(Span80)对木蜡和粘土颗粒均有有效的分散和分离作用,并使木腊均匀结合于粘土表面,使粘土颗粒间隙变小,亲水孔变为憎水孔,增加了蒸发水分穿透膜层的阻力,实现了土膜的保水功能,在模拟的沙漠气候人工气候箱内实现了草的正常生长。
The purpose of this paper is to solve the problem of soil self-contained water in desertification areas. The surface of soil particles was modified by molecularly-modified natural wood wax through special surfactants screened. The particles were constructed on the surface of test sand in the artificial climate chamber simulating the desert climate to form a layer of breathable and water-repellent soil membrane. , Differential thermal analyzer, X-ray diffraction, infrared spectroscopy and other methods to study the structure of the film, water retention mechanism and grass growth. The results showed that sorbitan monostearate (Span80) could effectively disperse and separate wood wax and clay particles and uniformly bond the wood wax to the clay surface, making the clay particle gap smaller and the hydrophilic pores Into a hydrophobic hole, increasing the resistance of evaporating water to penetrate the membrane to achieve the water retention function of the soil membrane, and realizing the normal growth of grass in a simulated desert climate artificial climate chamber.