*3.7. Other Influences*

## 3.7.1. Wood Heating

The samples are heated during the plasma treatment. The resulting temperature was determined using a thermal camera. The error of measurement was 2 ◦C.

Detection photos were taken right after removal from the DCSBD on the side that was placed into the plasma region. It was noticed that the wood did not heat up evenly, that is because the wood is not perfectly smooth. After 10 s, the maximum temperature of 52.2 ◦C was reached for the 0.15 mm gap. At a greater distance from the plasma—1 mm—it was only 40.8 ◦C.

The measurement of the temperature in the case of O2 and Ar atmosphere was affected by the procedure of getting the samples out of the reactor. It is assumed that the maximal temperature values were similar to the values obtained in the case of air treatment.

To separate the influence of the temperature, the untreated sample was heated to 60 ◦C by a hot air gun and measured with SeeSystem and SEM. The result did not show observable changes in surface properties. The SFE changed by a maximum of 2.5% of the total value. In Table 2 the highest achieved a temperature of activated wood under different conditions could be seen.

**Table 2.** The maximum measured temperature of the wood sample surface.

