There are many cases of microwave extraction in recent years, mainly due to the great advantages of microwave extraction technology.
First of all, the extraction time is fast and efficient. Under the action of high frequency microwave, the molecules in soybean and solvent generate a lot of heat in a period of time, which accelerates the penetration of soybean samples, rapidly solventizes the samples and greatly improves the extraction speed.
Secondly, the whole heating process is to heat the soybean itself by converting the energy inside the soybean into heat energy. The whole soybean itself is heated at the same time, and the uniformity effect is better, so as to ensure the effectiveness of the extraction components, and the extraction components will not be denatured due to the uniformity problem.
At the same time, through repeated soybean extraction experiments, we proved that microwave has the advantage of selective heating of extracted raw materials.As the polarity of soybean and solvent itself is greater, the absorption of microwave is greater, heating is happy, thus promoting the speed of extraction, and for non-polar solvent, microwave will not be heated, so the choice of solvent with large polarity can greatly improve the extraction efficiency, thus achieving the best effect.
Because soybean itself contains polar water molecules, and at the same time increase the soaking solvent,in the extraction process, the effect of the microwave field will cause strong polarity shock, so that the hydrogen bond between the internal cells of soybean molecules relax, cell membrane structure electrical breakdown and rupture,the penetration of soybean to the matrix, the yield of extraction greatly increased.
The extraction time of soybean depends on the weight and heating power of the raw material, which usually takes 10-15 minutes.But the extraction time varies greatly from one raw material to another.Generally speaking, the higher the power of the equipment, the higher the extraction efficiency.
In different extraction cases, environmental humidity is also very important. Some customers have very high requirements for the final product quality of extraction.If the extraction environment temperature is slightly higher, the denaturation of the substance will eventually occur, which requires us to add a humidity sensor in the design of the equipment to control and intervene the humidity, so as to achieve the best extraction effect.