The birch (Betula spp.) outer bark is a valuable product rich in betulin. After removal of betulin extractives, suberin containing tissues are left. Suberin biopolyester built from α,ω-bifunctional fatty acids (suberinic acids), which after depolymerization together with lignocarbohydrate complex potential adhesive as side-stream (residue) obtaining suberinic for polyol synthesis. In this work, we studied the utilization possibilities particleboards said residue obtained by four different...

Developing polyols from biomass sources contributes to a more circular economy by replacing petroleum-based in the vast production of polyurethanes (PUR). One such potential source could be leftover birch bark which suberinic acids (SA) can obtained. The purpose this study was identify best synthesis routes for novel SA-based polyols, obtain rigid PUR foams, and evaluate their competitiveness suitability as thermal insulation material. Novel were synthesized depolymerized SA esterification...

In the last two decades, there has been increased interest in research focused on developing innovative polymer composite materials for food packaging, obtained by compounding polymers with organic fillers, intended manufacture of storage containers. Woodplastic composites (WPCs), due to high content lignocellulosic filler, are consideredbiocomposites and can be used fabrication such types Their formulations include, along matrix functional additives. One most important considerations while...

Global sustainability challenges prompt the world to modify its strategies and shift from a fossil-fuel-based economy bio-resources-based one production of renewable biomass chemicals. Depolymerized suberinic acids (SA) were considered as an alternative resource develop bio-polyols that can be further used in polyurethane (PU) material production. Birch (Betula pendula) outer bark was raw obtain SA, extracted with ethanol, depolymerized potassium hydroxide ethanol solution. By acidifying...

Birch outer bark is a byproduct accumulated from birch tree ( Betula pendula Roth. and pubescens Ehrh.) processing contains up to 50 wt% suberin. Suberin biopolyester built mostly α,ω-bifunctional fatty acids (suberinic acids) which after depolymerization together with lignocarbohydrate complex potential adhesive for obtaining particleboard composites. These composites can be made in hot-pressing process at around 225 °C temperature. The high temperature suberinic acid-based disadvantage...

Suberin is a complex polyester biopolymer, and it practically impossible to estimate the real content of suberin in suberised plant tissues. This indicates importance development instrumental analytical methods for comprehensive characterisation derived from biomass successful integration suberinic products into biorefinery production chains. In this study, we optimised two GC-MS methods-one with direct sylilation, second additional depolymerisation, using GPC RI detector polystyrene...

Global sustainability challenges prompt the world to modify their strategies and shift from a fossil-fuel-based economy bio-resources-based one production of renewable biomass-based chemicals. Different processes exist that allow transformation raw biomass into desirable bio-based products and/or energy. Depolymerized suberinic acids (SA) can be considered as an alternative resource different feedstocks for value-added product obtaining, example develop bio-polyols further used in polymeric...

The effects on birch outer bark (BOB) ethanolic extractives’ chemical composition after recrystallization with C2–C5 alkanols were studied in this paper. Ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, and 1-pentanol used as solvents. solubility of BOB extractives at the solvents boiling point was determined empirically. It found that, an increase solvents, increased, reaching up to 486 g/L 1pentanol 142.2 °C. Recrystallization yields reached 67 wt% using 2-butanol purity betulin 96...

Silver birch ( Betula pendula ) outer bark suberin can be used as a raw material to make an adhesive for particleboards (PBs). It is promising formaldehyde-free alternative traditional synthetic resins. However, the acidic, which catalyse furfural (FUR) formation from xylans in wood particles that are preparation of PBs. FUR being volatile organic compound emitted PBs and exposure it have harmful effects on humans. In scope this study, technological parameters (wet pH: 3, 6 9), glycerol...

The apparent shift in climate has resulted the pursuit of environmentally friendly bio-based products to reduce carbon footprint. In scientific literature, there are many attempts make phenol-formaldehyde resins (PFR) more sustainable by using phenolics synthesis instead petroleum-based phenol. However, it is also important content formaldehyde binder, vapours which toxic and even carcinogenic human body. One technologically simplest solutions could be incorporation another wood composite...

The aim of the study was to investigate effect process parameters on production hydrogels with antisolvent precipitation using unpurified (UB) and purified (PB) birch outer bark betulin powder samples. Experimental activities are focused concentration colloidal dispersions filtration UB or PB sample particles obtained by method varying dilution saturated (at boiling temperature) ethanol solutions different water content. During maximum solubility in at point (22.0 g/L) (55.0 determined. For...

The goal of this study was to evaluate the influence birch outer bark (BOB) extraction solvents on antioxidant properties obtained dry extracts, which were added in cosmetic product emulsions. Extracts ethanol, 2-propanol, 1-butanol and ethyl acetate as well one purified ethanol by means recrystallization used additives, 30 60 mg·g -1 concentrations, water-in-oil type It found that raw extracts had a considerably higher stability than ones, because showed phenolic compound content. highest...

Dynamic light scattering (DLS) is a well-established technique to analyze particle size in liquid medium and sample preparation an essential step of the analysis obtain reliable data. In this study, pretreatment aqueous suspension containing betulin particles was studied characterize colloidal supramolecular hydrogels obtained by antisolvent precipitation from purified unpurified samples. Parameters two-step homogenization process using rotor ultrasonic homogenizer, concentration, pH were...

Analytical method has been developed and validated to determine free or leachable furfural concentration in wood-based panels. Particleboards obtained from birch wood suberinic acids binder were chosen as a reference material. Two methods two solvents tested. Acetone extracts of the samples analyzed with gas chromatography (GC) flame ionization detector system. Water high-performance liquid chromatography-ultraviolet spectroscopy (HPLC-UV) After GC data acetone was below limit detection....

Application of the adapted methylene blue (MB) adsorption method in determining specific surface area was investigated on particles containing hydrogels obtained from purified (99 wt%) and unpurified (60 betulin samples. In order to study isotherms MB aqueous dispersions, initial concentration varied. An analysis process with Langmuir model performed. The results indicate that experimental data fits very well model. Straight are good determination coefficients (R 2 =0.99; R =1.00), which...