Natural bio-based products for wood coating and protection against degradation: A Review

Teacă, Carmen‐Alice; Roşu, Dan; Mustaţă, Fanica; Rusu, Teodora; Roşu, Liliana; Roșca, Irina; Varganici, Cristian–Dragos

doi:10.15376/biores.14.2.teaca

Cited by 83 publications

(58 citation statements)

References 109 publications

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“…Moreover, silicon compounds, especially those with amino groups, increased the resistance of the treated wood against decay fungi and molds [ 4 , 6 , 11 , 12 ]. According to literature date, natural substances that are harmless to humans and the natural environment, such as chitosan, essential oils, natural oils or propolis, could also be applied in ecological wood protection [ 13 , 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Bending Strength of Wood Treated with Propolis Extract and Silicon Compounds

et al. 2021

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The modification of wood and its treatment with various preservatives may affect its mechanical properties, hence the knowledge of the character changes in wood caused by impregnation is of great importance. Therefore, the aim of the research was to determine the effect of impregnation, with the propolis-silane preparation (EEP-MPTMOS/TEOS) consisting of the propolis extract (EEP) and silicon compounds: 3-(trimethoxysilyl)propyl methacrylate (MPTMOS) and tetraethoxysilane (TEOS), on the bending strength of treated wood. Moreover, in the study wood treated with components of the propolis-silane formulation was used, namely 70% ethanol, the propolis extract, and silanes (MPTMOS/TEOS). In order to determine whether the impregnation of wood affects its long-term bending, creep tests were performed depending on the humidity. The impregnation of wood with the propolis extract and the propolis-silane preparation (EEP-MPTMOS/TEOS) contributed to the increase in modulus of rapture and work to maximum load values compared to the untreated wood. In dry wood condition, the wood treated with EEP and EEP-MPTMOS/TEOS was characterized by lower modulus of elasticity values than the control samples. In turn, in wet wood condition, wood treated with the propolis-silane preparation showed an increase in the MOE value. Moreover, the impregnation of wood had an influence on the wood creep process under bending loads. The treated wood was characterized by higher relative creep compliance than the untreated wood. The exception was the wood impregnated with EEP-MPTMOS/TEOS, which showed comparable relative creep compliance to the control samples. The presented results indicate that wood treated with a bio-friendly preparation based on propolis and silicon compounds can be used in various application and also in variable humidity conditions.

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Section: Introductionmentioning

confidence: 99%

Bending Strength of Wood Treated with Propolis Extract and Silicon Compounds

et al. 2021

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“…Semi-drying and drying oils are a perfect way of forming hydrophobic coatings. The hydrophobic coating with the vegetable oils protects materials not only from the water but also from the destructive effects of microorganisms, termites, and nematodes, and also is the protection against UV radiation [ 4 ]. Therefore, modification processes through chemical and thermal methods are effectively applied to oils of plant origin involved in coating formulations [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Different Plant Oil Impregnation and Hardening Temperatures on Physical-Mechanical Properties of Modified Biocomposite Boards Made of Hemp Shives and Corn Starch

et al. 2020

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In this study, tung tree and linseed drying oils, as well as semi-drying hempseed oil, were analyzed as the protective coatings for biocomposite boards (BcB) made of hemp shives, corn starch binder, and the performance-enhancing additives. The hydrophobization coatings were formed at 40, 90, and 120 °C temperatures, respectively. The physical-mechanical properties such as the compressive strength, thermal conductivity, dimensional stability, water absorption, and swelling were tested. In addition, scanning electron microscopy (SEM) was employed for the analysis of the board microstructure to visualize the oil fills and impregnation in pores and voids. It was demonstrated that the compressive strength of oil-modified BcBs compared to uncoated BcBs (at 10% of relative deformation) increased by up to 4.5-fold and could reach up to 14 MPa, water absorption decreased up to 4-fold (from 1.34 to 0.37 kg/m2), swelling decreased up to 48% (from 8.20% to 4.26%), whereas the thermal conductivity remained unchanged with the thermal conductivity coefficient of around 0.085 W/m·K. Significant performance-enhancing properties were obtained due to the formation of a protective oil film when the tung tree oil was used.

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“…Some of these conventional preservatives have been banned for use in residential areas, such as, chromated copper arsenate (CCA) in Denmark and Indonesia, as it poses a significant health hazard [7]. Natural and bio-degradable preservatives, such as those derived from plant-seed oil and waxes, can serve as an effective preservative on the surface of the wood [8]. There is an ample variety of bio-based preservatives, including essential oils, resins from bark, and biopolymers [8].…”

Section: Motivationmentioning

confidence: 99%

“…Natural and bio-degradable preservatives, such as those derived from plant-seed oil and waxes, can serve as an effective preservative on the surface of the wood [8]. There is an ample variety of bio-based preservatives, including essential oils, resins from bark, and biopolymers [8]. However, their main disadvantage has been regarded as their mild susceptibility to leaching [8].…”

Section: Motivationmentioning

confidence: 99%

“…There is an ample variety of bio-based preservatives, including essential oils, resins from bark, and biopolymers [8]. However, their main disadvantage has been regarded as their mild susceptibility to leaching [8]. A few ways researchers have been able to resolve the issue of leaching is by enzymatic polymerization of wood extractives with the lignin contained in the wood [9] and, by employing nanoparticles [10].…”

Section: Motivationmentioning

confidence: 99%

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