hemicellulose of southern yellow pine wood spices was extracted by pressurized hot water at three different temperatures: 140°c, 155°c and 170°c. compounding with pp (polypropylene) was performed by extrusion after preparing wood flour and sieving to determine its mesh size. the ratio of wood to polymer was 50:50 based on oven-dry weight of wood flour. all extraction treatments and control samp...

The natural spruce wood has low resistance against biological degradation and weather effects, so further protection is required, up to meeting the durability requirements for used in exterior classes. According preservatives standards, coatings as water repellents belong group OS (organic solvent) preservatives. have a water-repellent function, they are not toxic, these advantages make them us...

to evaluate the nutritive value in some lignocellulosic materials, 3 sets of experiments were conducted on aspen, and grape woods. to enhance the digestibility, the woods were treated with 5% naoh. throughout the first trial, chemical composition and digestibility coefficients of dry matter, organic matter and ndf of experimental feeds, ph of rumen, as well as palatability were evaluated while ...

The wood is exposed to possible damages caused by weather, requiring the application of a finishing coat provide extra protection. aim this work was evaluate influence addition microfibrillated cellulose in waterborne varnish on colorimetric parameters, wettability and finish characteristics products. Color evaluated with CM-5 spectrophotometer; surface analyzed contact angle measurement using ...

Abstract Wood is a widely used construction material that has many advantageous properties. However, it suffers from weaknesses such as low-dimensional stability and low durability in humid environments. These issues are associated with the porous vascular structure of wood leads to high water uptake capacity. This research aims reduce capacity spruce by dip-coating samples an aqueous colloid s...

The moisture sensitivity of wood–polymer composites (WPCs) is mainly related to their hydrophilic wood components. Coatings are among the alternatives that improve dimensional stability these composites. However, adhesion most coatings WPC surface generally poor. Thus, chemical and/or mechanical treatments should be applied coating adhesion. Therefore, main objective this study was polypropylen...

In order to protect the wood surface and improve properties of coatings, microcapsules with healable discoloration functions are produced, their function is obtained using shellac, which can be cured at room temperature, as repairing agent. this paper, self-made shellac color-changing were added varnish in different proportions form composite coating on a board, color difference was measured te...

Shellac (SL) is a natural resin employed for wood finishing, while clove (Eugenia caryophyllata) and thyme (Satureja hortensis) essential oils (C-EO, T-EO) are organic products of vegetal origin with antifungal, antimicrobial antioxidant properties. The present paper aims at exploring the potential modifying alcoholic shellac solutions T-EO), focussing on recurrent effects this modification tra...