Vacuum drying oven - Basic principle and advantages of vacuum drying oven

A vacuum drying oven is a device that performs drying treatment in a vacuum environment, and its basic principles and advantages are as follows:

Vacuum drying oven - Basic principle and advantages of vacuum drying oven

Basic principle:

Vacuum environment: The vacuum drying oven creates a low-pressure, low-temperature vacuum environment by extracting air from the box.

Vacuum evaporation: In a vacuum state, the boiling point of water decreases, allowing it to evaporate at a lower temperature. Therefore, the vacuum drying oven utilizes the principle of vacuum evaporation to evaporate the moisture in the sample.

Evaporative cooling: As water evaporates, the surface temperature of the sample decreases, resulting in an evaporative cooling effect. This helps to avoid excessive heating of the sample.

Vacuum drying oven - Basic principle and advantages of vacuum drying oven

Advantages:

Low temperature drying: Due to the lower boiling point of water under reduced pressure, a vacuum drying oven can complete the drying process at a relatively low temperature, which is beneficial for retaining thermosensitive substances.

Avoiding oxidation: In a vacuum environment, the concentration of oxygen is low, which can slow down or avoid the oxidation reaction of some substances, especially providing protection for some easily oxidized samples.

Avoiding sample surface scaling: Due to the evaporative cooling effect, the sample surface is less prone to scaling, which is beneficial for the uniformity of drying.

Preserving volatile substances: For volatile substances, a vacuum environment helps to evaporate them more quickly from the sample, improving the drying efficiency of the sample.

Preventing cross contamination: Under vacuum conditions, the presence of microorganisms and particles in the air is reduced, which helps to prevent cross contamination of the sample.

Widely applicable: Suitable for experiments with high sample requirements, such as biomedical, pharmaceutical, food industry, and other fields.

Overall, vacuum drying boxes use the principle of vacuum evaporation to dry at lower temperatures, which is beneficial for protecting the properties and structure of samples and is suitable for experiments and applications that require temperature sensitive substances.