A. Kübra Yontar et al.
Inorganic Chemistry Communications 159 (2024) 111865
Fig. 5. EDS mapping results of nanosilver modified and non-modified MDF surfaces.
patterned/unpatterned MDF, the number of revolutions at the last wear point is recorded. The third test was the scratch resistance test. For the scratch test, a 50 x 50 mm MDF sample is cut and placed in the test device. The scratch tip of this tester is diamond and double scratches are created starting from 1 N force up to 2, 4, 6 N. Each double scratch is adjusted to 1 – 2 mm between itself, and 3 – 5 mm between double scratches. The test is continued until the maximum load value required to produce a continuous surface scratch is determined. In addition, the gelation times of polymeric adhesives used in the production of surface coatings with nano silver reinforcement in 3 different ratios were also calculated. This is the time required for the solution to cure after being absorbed into the paper and hot pressed. Gelling time covers a large part of the time spent on total production. Therefore, by shortening this period, time and energy savings can be achieved in production.
2.6. Antibacterial activity AgNPs and modified MDF surfaces with plant extracts were tested for their antibacterial activities using a version of the Japanese Industrial Standard JIS Z 2801. Staphylococcus aureus (NCTC-13552) and Escherichia coli (ATCC 25922) bacteria had been grown at a concen tration of 5 x 10 5 CFU/mL, and 1 x 1 cm test samples were inserted within. As a control, a culture with 5 x 10 5 CFU/mL that was created without a sample was employed. Samples were shaken in Eppendorf tubes for 4 h at 100 rpm. The sample was vortexed after spending 30 s in an ultrasonic water bath to separate the bacteria that were sticking to the surface. Transferring 100 L of suspension into 900 L of physiological saline (FTS) served as the dilution process. Plate Count Agar (PCA)-filled petri plates were split into eight equal portions, and 25 μ L of each dilution was seeded. Three duplicates of each experiment were per formed. The antibacterial activity value of colony-forming units (CFU)
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