Improvement of wood decay resistance with cinnamaldehyde chitosan emulsion

Fang, Senmiao; Feng, Xuechun; Lei, Yafang; Chen, Zhangjing; Li, Yan

doi:10.1016/j.indcrop.2020.113118

Cited by 18 publications

(10 citation statements)

References 35 publications

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“…We have modeled the process of biological destruction of timber protected by thermal modification and protective coating based on antiseptic hydrophobicizer, and determined the parameters of biodegradation, as well as dependences that make it possible to change the proportion of destroyed material. According to the analytical data and established dependences, the share of destroyed timber was calculated, which was 1 for natural wood, 0.033 for thermally modified timber, and 0.009 y = 1,047x 0,6804 y = 0,0725x 0,9107 y = 0,0453x 0,9928 y = 0,034x 1,0059 y = 4E-05x 2,335 y = 2E-06x 2,9251 y = 0,0983x 0,7423 y = 6E-06x 2,6803 y = 5E-07x 3,2227 8 -treated with oil-wax; 9 -treated with azure when protected with oil, respectively, under the action of microorganisms over 60 days. 2.…”

Section: Discussionmentioning

confidence: 96%

“…Environmental concerns about organic chemicals used to protect timber and timber products against biological degradation have led to the development of natural timber preservatives with lower health risks and long-term efficacy [3]. In the cited study, mixing chitosan and cinnamic aldehyde to form an emulsion as a natural timber preserva-tive may enhance the ability to resist destructive fungi.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…One of the natural substances potentially used as an agent against wood-destroying pests is caffeine. In the cited study, an aqueous solution of caffeine (20 g/dm 3 ) was applied onto 7 selected tree species (pine, spruce, beech, English oak, red oak, walnut, and sapele). The treated timber was then exposed to fungi (Serpula lacrymans and Coniophora puteana) and air mold for 28 days.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Determining patterns in reducing the level of bio-destruction of thermally modified timber after applying protective coatings

Tsapko

Horbachova

Mazurchuk

et al. 2021

EEJET

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This paper reports the analysis of the biological destruction of timber and the use of protective materials, which established that the scarcity of data to explain and describe the process of bioprotection, neglect of environmentally friendly agents lead to the biodegradation of timber structures under the action of microorganisms. Devising reliable methods for studying the conditions of timber protection leads to designing new types of protective materials and application technologies. Therefore, it becomes necessary to determine the conditions for the formation of a barrier for bacteria permeability and to establish a mechanism for inhibiting material biodegradation. Given this, the dependence has been derived to determine the proportion of destroyed material under the effect of microorganisms when using an antiseptic-hydrophobicizer, which makes it possible to evaluate biopenetration. Based on the experimental data and theoretical dependences, the share of destroyed timber was determined under the effect of microorganisms, which is equal to 1 for natural timber. At the same time, this value for thermally modified timber is 0.033, and, when it is protected with oil ‒ 0.009, respectively, exposed to the action of microorganisms for 60 days. It should be noted that the presence of oil, wax, and azure leads to blocking the timber surface from penetration. Such a mechanism underlying the effect of protective coating is likely the factor in the process adjustment, due to which the integrity of the object is preserved. Thus, a polymer shell was created on the surface of the sample, significantly reducing the penetration of microorganisms inside the timber, while the loss of timber mass during biodestruction did not exceed 2.5 %. Therefore, there are grounds to assert the possibility of targeted control over the processes of timber bio-penetration by using coatings capable of forming a protective film on the surface of the material

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Section: Discussionmentioning

confidence: 96%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Determining patterns in reducing the level of bio-destruction of thermally modified timber after applying protective coatings

Tsapko

Horbachova

Mazurchuk

et al. 2021

EEJET

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“…The effects of the emulsion on fungal morphology were examined by adding 1.5 mL of a given mixture to 30 mL of molten potato dextrose agar in plastic petri dishes to produce a final 50 µl/mL concentration of media (Fang et al 2020). A five-mmdiameter agar plug cut from the actively growing edge of a culture of A. niger was…”

Section: Light Microscopic Observation (Lm)mentioning

confidence: 99%

“…A cinnamaldehyde chitosan mixture had good activity against some decay fungi (Fang et al 2020), but has not been evaluated against mould fungi. Aspergillus niger, commonly occurring food spoilage, is also prominent among 'indoor moulds' reported in buildings (Clausen et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Improvement of mould resistance of wood with cinnamaldehyde chitosan emulsion

Fang

Gao

et al. 2021

Wood Sci Technol

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Mould fungi can grow on virtually any substrate and are particularly common on cellulosic materials such as wood. Fungicides can limit the risk of mould attack, but increasing concerns about pesticide use have encouraged a search for more natural protection methods. Cinnamaldehyde is a promising antifungal candidate, but has not been fully effective. In this study, chitosan and cinnamaldehyde were used to prepare an emulsion to reduce the volatility of cinnamaldehyde, and the antimould performance of the emulsion-treated wood was evaluated. The ability of cinnamaldehyde chitosan emulsion was assessed for inhibiting mould growth as well as its effect on membrane function and hyphal morphology of Aspergillus niger. Cinnamaldehyde chitosan emulsion can reduce the amount of free cinnamaldehyde, thereby increasing the retention rate of cinnamaldehyde. The control ability of wood treated with 3.0:1.0 molar ratio of aldehyde to amino group in cinnamaldehyde chitosan emulsion against A. niger was 95.8%. Mould growth was limited in the presence of the emulsion. The treatment appeared to disrupt cell membrane function as evidenced by increased levels of extracellular proteins and nucleic acids. The results suggest that the cinnamaldehyde chitosan emulsion improved the stability of cinnamaldehyde in aqueous solution as well as effectively protected wood from mould.

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