Abstract
Liquid membrane applied in soil has a good soil moisture conservation and evaporation suppression performance. Application of spectrum analysis technology to understand its structure and micro morphological characteristics will be help to reveal the soil moisture conservation mechanism of liquid membrane. In this paper, we used the three types of liquid membrane as the research object based on the laboratory preparation, with infrared spectrometer (FTIR) and environmental scanning electron microscope (ESEM) as the means, analysis the soil moisture mechanism of liquid membrane. The results showed that the -OH between the CMC and PVA generated intermolecular hydrogen bonds, the formation of hydrogen bonds between molecules of the two components strengthened the two-phase’s compatibility, increasing the liquid membrane’s effective groups and forming a dense mesh structure.ESEM observation showed that liquid membrane can effectively cementing soil particles, generating the soil-membrane structure, reducing soil moisture to evaporate, improve soil moisture conservation performance.
Highlights
In view of this, this article try to infrared spectrometer (FT-IR) and environmental scanning electron microscope (ESEM) as the means, analysis the soil moisture mechanism of liquid membrane, try to reveal the soil moisture conservaton mechanism of liquid membrane from spectroscopy, so as to provide reference for the similar research and using for reference.2.1 Preparation of liquid membraneLiquid membrane is based on polyvinyl alcohol (PVA) and sodium carboxymethyl cellulose (CMC) as the main raw materials, crosslinking agents, defoamers, glycerin and water as the secondary raw materials, three types of liquid membrane were prepared and labeled as 1 (PVA CMC=3:1), 2 (PVA CMC=1:1) and 3 (PVACMC=3:1)
The pure PVA powder and pure CMC powder were mixed in deionized water according to three ratios, bathing for 3 h at 80 ć in the autoclave water, at the same time, constant stirring, the speed is 100r/min, the quality of the solution is obtained by 8%
Add other auxiliary materials, 0.5h reaction, and the liquid membrane is prepared after cooling. 2.2 Test methods the OH peak was changed, and it appeared in the 3303cm-1, 3265cm-1 and 3200cm-1also shows CMC -OH and polyvinyl alcohol (PVA) -OH produce intermolecular hydrogen bonds, the formation of intermolecular hydrogen bonds between the two components of molecular strengthen the compatibility between two phase, so that the liquid membrane formed a dense mesh structure, favorable for water and soil moisture conservation
Summary
This article try to infrared spectrometer (FT-IR) and environmental scanning electron microscope (ESEM) as the means, analysis the soil moisture mechanism of liquid membrane, try to reveal the soil moisture conservaton mechanism of liquid membrane from spectroscopy, so as to provide reference for the similar research and using for reference
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