Surface characterization of wood treated with boron compounds combined with water repellents

Abstract

Longer weathering exposure periods are more reliable for end‐use performance evaluations of wood surfaces. This study aimed to investigate the effect of boron impregnation on the surface composition and color of Scots pine (Pinus sylvestris L.) wood exposed to 18 months of natural weathering in the West Black Sea Region of Turkey. All measurements were performed at 6 month intervals. Samples were first impregnated with boron compounds and then for a second time using five different water‐repellent materials. Polyethylene glycol and aluminum sulfate were introduced with the boric acid as single impregnations. With increased weathering time, the samples darkened, while sodium silicate kept the color change to a minimum. Nano boron‐impregnated samples exhibited more effective results than those impregnated with boric acid. The FTIR analysis results demonstrated that the impregnation process had caused significant changes in the chemical structure of the samples. The changes in the chemical structure of the wood resulting from the impregnation process were partially maintained during the weathering.

Surface characterization of weathered and heat‐treated wood‐based composites reinforced by styrene maleic anhydride

“…Heat treatment increases the fungal resistance of wood samples. This situation is supported in the literature …”

“…The 1213 cm −1 peaks show the C═O voltage found in the lignin. The reduction or loss of peaks in this band range is indicative of delignification and degradation of the aromatic rings . In the study, the 1230‐1270 cm − 1 absorption peak density was significantly reduced in the test samples.…”

“…The reduction or loss of peaks in this band range is indicative of delignification and degradation of the aromatic rings. 39 In the study, the 1230-1270 cm − 1 absorption peak density was significantly reduced in the test samples. The rate of lignin increased with the addition of wood flour into SMA copolymer.…”

“…The 1630‐1660 cm −1 band C═O‐linked aryl ketones are associated with unbound C═C and the water band. The density of the absorption at 1630‐1660 cm −1 indicated the α‐C═O linkages with the para‐hydroxyphenyl groups . Studies have reported that before the weathering test, the decrease in absorption intensity between 1630 and 1650 cm −1 or the falling of the peaks reflects the decrease in the amount of water absorbed.…”

“…The density of the absorption at 1630-1660 cm −1 indicated the α-C═O linkages with the para-hydroxyphenyl groups. 39 Studies have reported that before the weathering test, the decrease in absorption intensity between 1630 and 1650 cm −1 or the falling of the peaks reflects the decrease in the amount of water absorbed. According to the study, the peak value of the variations was decreased.…”