Dimensional stabilization of wood treated with tall oil dissolved in different solvents

Abstract

Many water repellents, such as classic wood preservatives have the disadvantage of being harmful to the environment. Therefore, interest increased even eco-friendly, or of biodegradable material. Natural oils (tallow, linseed oil), appears to be capable of preventing the wood water uptake. However, the total amount of oil required to achieve a high penetration of the sapwood. The aim of this study was to investigate the water repellent efficiency of tall oil dissolved in different solvents. As solvents ethanol, methanol, acetone and tall oil water emulsions were used. Scots pine and Uludag fir sapwood samples were impregnated with tall oil formulations. For this purpose we used tall oil/solvents (W/W) at the concentrations of 10% and 20% respectively. Test samples cut into small sizes (20 x 20 x 10 ± 0,2 mm) for water uptake and tangential swelling tests. The tests were carried out based on American Wood Protection Association (AWPA) standard E4 (2003).

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

“…In one literature study, after 500 hours of accelerated aging, Scots pine wood samples impregnated with tall oil prepared using a 20% concentration of methanol exhibited behaviors similar to the control samples. After the test, the gloss values of both the control and tall oil‐impregnated samples had increased by 20% …”

“…After the test, the gloss values of both the control and tall oil-impregnated samples had increased by 20%. 39 Changes in gloss and color occur when wood samples are exposed to weathering conditions for a short period of time.…”

Use of Eucalyptus grandis clones treated with a water repellent to improve the dimensional stability of utility poles

“…There is always a certain dimensional stability loss after weathering, but the control specimens (neither selected clones nor treated with the WR) show significantly higher values. It should be noted the main advantage of the WR is that it can be applied in a single stage mixed with the preservative, since it does not require other inputs such as solvents (Can and Sivrikaya 2016) or temperature (as in the application of zinc chloride-silicone oil) (He et al 2019).…”

Dimensional stabilization of wood by chemical modification using isopropenyl acetate

“…Modification with thermosetting resins improves compression strength and performance against marine borers (Lopes et al 2014(Lopes et al , 2015. Treatment with tall oils also reduced water absorption (Can and Sivrikaya 2016). Modified wood has outstanding dimensional stability, improved durability towards insects and micro-organisms.…”