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Whether the plasma cleaning machine can remove surface oil stains

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Published on:

15 Oct,2020

Whether the plasma cleaning machine can remove surface oil stains:

Plasma cleaning machine, surface modification, etching activation equipment widely used in plasma surface activation/cleaning; Plasma-treated bonding; Plasma etching/activation; Plasma degumming; Plasma coating (hydrophilic, hydrophobic); Enhanced bonding; Plasma-ashing, surface modification and other occasions, through plasma treatment, can improve the surface of the material wettability, so that a variety of materials can be coated, etching, printing and other operations, enhance the bond strength, while removing organic pollutants, oil or grease.

In plasma, the active particles can effectively activate the dirt on the surface of the object to achieve the purpose of cleaning, that is, plasma cleaning. For the plasma cleaning machine, the plasma adsorption on the surface of the cleaning material, the reaction between the cleaning material and the plasma occurs, produce new molecules, so as to further promote the formation of new molecules into gaseous molecules, remove oil and other dirt on the sticky film.

Plasma cleaning machine cleaning is different from traditional wet cleaning. Plasma cleaning is dry cleaning, the whole process of cleaning once, no residue. At the same time, it can improve the adhesion of the substrate surface membrane. The cleaning process is easy to control, easy to operate, highly efficient, and the cleaning time and gas (if necessary) can be controlled. According to our experience, to remove metal oil stains, we need to use the active group of plasma to react with oil stains to achieve the purpose of cleaning. We choose vacuum plasma cleaning machine as the test equipment.

The method to judge the cleaning of metal oil stains is to drop a drop of distilled water into the metal surface with a pipette, observe and compare the shape and diffusion of water droplets on the metal surface before and after cleaning, and judge the cleaning result of oil stains. This method is fast and simple, and can be clearly judged by naked eyes. It is an effective means to judge the cleaning effect of metal oil stains.

Tools/raw materials.

1. Clean the tweezers.

2. Put 50ml distilled water into a beaker.

3.100ul-500ul pipette.

4. Three heavy greasy metals, three light greasy metals, and three clean metals.

Vacuum plasma cleaning machine.

Methods/steps.

Step 1: Use tweezers to remove a heavy, greasy metal and place it on a clean piece of white paper.

Step 2: Adjust the pipette to a scale of 100UL, draw distilled water from the beaker, drop a drop of distilled water slowly on the heavy metal, and observe the shape and spread of the water droplets.

Step 3: Take out the second heavy greasy metal with tweezers, put it on the appropriate tray, open the cavity door, put the tray and heavy greasy metal into the cavity of the vacuum plasma cleaning machine system (ensure that the placement position is horizontal and the metal is not easy to slide off), and close the cavity door.

Step 4: Click the parameter setting of the touch screen to set the cleaning time. Press the start button. After about 30 seconds, the glow will start.

Step 5: Wait for the end of cleaning time and pressure relief, open the door, take out the cleaned metal sample with tweezers, and put it on the white paper.

Step 6: Use a pipette to slowly drop a drop of distilled water on the heavy greasy metal, and carefully observe the shape and spread of the water droplets.

Finally, compared with the test results, the droplet on the metal surface before cleaning is circular, forming a droplet with a contact Angle of about 90 degrees, and the metal is hydrophobic before cleaning. After using the plasma cleaning machine, the pipette drops the water onto the metal surface, the water droplets immediately disperse, the contact Angle is significantly reduced, and the metal surface's spreading ability to water, namely wettability, is significantly improved, indicating that the metal hydrophilicity is improved, and the metal is cleaner after the plasma cleaning.

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