Using PCA200 portable contact angle meter to measure the surface energy of solids and the dyne pentocompare

during the production processRegarding the productThe onlinedetectionBeing able to quickly respond to product quality, for quality controlmanufactureHe TihighProduction efficiency is particularly important.Online testing is required in the production process of products in many industriessolidSurface free energy, such as semiconductor industry, spray coating processCoating industry, printing industryWait.currentlyThe online detection of solid surface free energy usually uses the Dyn pen test method, whichofMeasurement costcompareLow, but difficult to achieve accuracy and measurement efficiencywantPlease.

This article adoptsPortable contact angle measuring instrumentOnline measurement of the surface free energy of solids has many advantages compared to traditional dyne pen measurement methods.

Portable contact angle measurementceremonymakeuseGermanyDataPhysicsDeveloped and produced by the companyPCA200 (Figure 1),And also commercially availabledyne pen(Figure 2).

（Figure 1）PCA200 portable contact angle measuring instrument （Figure 2）Commercial Dain pen(From)network）

PCA 200 portable contact angle measuring instrument：Based on video image methodMeasuring liquid-solid contact angle, canchoiceWater and Diiodidemethane（Multiple liquids to choose from）As a testing liquid，useOwens, Wendt, Rabel andKalble(OWRK) Method for calculating the surface free energy of solid materials.measurementtimePlace PCA200 under testsolidOn the surface of the sample,Just tap oncedisplayScreen,It can be automatically completedinjectiondoubledroplet、automatic calculation/DisplayContact angle value and surface free energyValue and calculate/display simultaneouslyPolarity and色散Component (Figure 3).PCA200stillhaveThe thresholdSettingsfunction，on the screencandirect displaymeasurement resultsOKorNot OK。It only takes a few seconds to operate and obtain all the results.

（Figure 3）PCA200Portable contact angle meterControl and display interface

dyne pen：Each peninsideThe surface tension of the test solution varies,needChoose a range of different surface tensions（as：32, 34, 36)The Dain pen is placed on the surface of the solid being testeddrawlineObserve whether the liquid film spreads evenly. If the liquid film remains continuously non contracted for 1-2 seconds, it indicates that the material surfaceFree energy is higher thanThe calibration value of the pen; If the liquid film shrinks, it is necessary tousePen with lower tension valueUsing the same method againTest until foundapproximateZhang Lithreshold valuemake, do, create, compose, write, etc.For the final measurement result.

This experiment measured with a Dyne pen and PCA200 respectivelySilicon wafer, plastic, aluminum薄、Painting ListnoodlesFour types of samples,The testing items areContact angle and surface free energy. To ensure the reliability and comparability of the results, all test areas of the samples were processed in the same way and measured within the same time range,image4Displayed in plasticsurfaceMeasurement of the previous two methodsstate.

（Figure 4）dyne pen(left)Compared to PCA 00 (right)）Testing area and time consumption

Using two methods to analyze four samplesMeasurement result statistics are as follows:image5shownThe red represents the measurement result of the Dain pen, and the blue representsPCA200The measurement results.

（image5） Comparison of measurement results

fromFigure 5It can be seen that，It is difficult to provide accurate measurement results using the Dain pen method. For four sample surfaces with completely different materials, using the Dain pen measurement method cannot distinguish the difference in their surface free energyThis is due to the reading of the measurement results by the Dain penDependent on visual assessment, therefore essentially subjectiveArtificially estimated value. And adoptPCA200 measurementThe method can accurately calculate the surface free energy values of four samples，Moreover, it can simultaneously provide the component values of dispersion force and polarity force occupied by different surface free energies, which provides further data for distinguishing the surface characteristics of samplessupport.

In addition,anddyne penmeasurementcomparison, PCA200haveSmaller testing area(Figure 4), this is more suitable for small sample measurements and samples that are afraid of contamination.

Moreover, the measurement time of the Dain pen is 45 seconds, while the PCA200 benefits from its one click design and fully automatic fitting calculation advantagesmeasurementtimeOnly 3 seconds.

Measuring Solid Surface Free Energy with a Dyn Penmethodcomparison,usePCA200 portable contact angle measuring instrumenthavemeasurementFeatures such as abundant information, accurate results, small measurement area, faster speed, and simpler operation.PCA200Very suitable for online detection of solid-liquid contact angle and solid surface free energy in the production process.

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