Wettability, surface free energy and cellulose crystallinity for pine wood (Pinus sp.) modified with chili pepper extracts as natural preservatives

Ziglio, Analine Crespo; Sardela, M. R.; Gonçalves, Débora

doi:10.1007/s10570-018-2007-9

Cited by 11 publications

(8 citation statements)

References 38 publications

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“…Modifications of the underlying wood can significantly change the SFE values [29,30,50]. The SFE of oak wood increased significantly after all surface modifications (Oak-REF = 40.12 mN.m −2 to values from 63.68 mN.m −2 to 74.38 mN.m −2 for M1–M4).…”

Section: Resultsmentioning

confidence: 99%

“…More work has been devoted to the determination of wood surface characteristics, the contact angle of wetting, and surface free energy, all of which affect adsorption and thus the adhesion of coatings to wood [25,26,27,28]. These surface characteristics are changed by the surface modification of the underlying wood species, but also by its aging during exposition [4,29,30,31]. In both cases, the effect of changes in the chemical composition of the substrate is visible [32,33,34,35]; with regard to modifications with nanoparticles, this consists of a change in wetting due to nanosized structural changes in surface morphology [36].…”

Section: Introductionmentioning

confidence: 99%

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Durability of the Exterior Transparent Coatings on Nano-Photostabilized English Oak Wood and Possibility of Its Prediction before Artificial Accelerated Weathering

et al. 2019

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Changes in surface material characteristics can significantly affect the adhesion and overall life of coatings on wood. In order to increase the durability of transparent exterior coatings, it is possible to use the surface modification of wood with UV-stabilizing substances. In this work, selected types of surface modifications using benzotriazoles, HALS, ZnO and TiO2 nanoparticles, and their combinations were applied to oak wood (Quercus robur, L.). On such modified surfaces, the surface free energy, roughness, and contact wetting angle with three selected types of exterior transparent coatings were subsequently determined. An oil-based coating, waterborne acrylic thick layer coating, and thin-layer synthetic coating were tested and interaction with the aforementioned surface modifications was investigated after 6 weeks of accelerated artificial weathering. The results of changes in the initially measured surface characteristics of the modified oak wood were compared to the real results of degradation of coatings after artificial accelerated weathering. The positive effect of surface modification, in particular the mixture of benzotriazoles, HALS, and ZnO nanoparticles on all kinds of coatings was proven, and the best results were observed in thick-film waterborne acrylic coating. The changes in the measured surface characteristics corresponded to the observed durability of the coatings only when measured by wetting using drops of the tested coatings.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Durability of the Exterior Transparent Coatings on Nano-Photostabilized English Oak Wood and Possibility of Its Prediction before Artificial Accelerated Weathering

et al. 2019

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“…The surface CA and water absorption of the modified samples are shown in Figure 11. The CA is a convenient indicator to evaluate the hydrophilic-hydrophobic nature of the surface, and the hydrophobicity of the wood surface is of great significance for practical applications [39][40][41]. The CA results showed significant differences between the four treatments ( Figure 11b).…”

Section: Determination Of Surface Wettability and Water Absorptionmentioning

confidence: 99%

Study on Improving the Fixation Rate of Impregnated Poplar Wood with Maltodextrin and 1,3-Dimethylol-4,5-Dihydroxyethyleneurea

Cai

et al. 2019

Applied Sciences

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The impregnation of poplar wood (Populus adenopoda Maxim) with 1,3-dimethylol-4,5-dihydroxyethyleneurea and maltodextrin and the effects of ZnCl2 and curing at 103 °C and 120 °C on the fixation rate and the leaching resistance of modified samples were investigated (103 °C curing, ZnCl2 + 103 °C curing, 120 °C curing, and ZnCl2 + 120 °C curing are denoted as 103, ZC-103, 120, and ZC-120, respectively), with the aim of improving the modification effect. The results showed that ZC-103 had the highest fixation rate, and its weight leaching ratio was higher than that of 120. Fourier-transform infrared spectroscopy showed that ZnCl2 did not affect the functional groups of the modified chemicals. The flexural strength and modulus and the compressive strength perpendicular to the grain were highest for ZC-103. In summary, ZC-103 exhibited the highest fixation rate, indicating that the hardener ZnCl2 bridged and increased the interfacial properties between the chemicals and cell walls and therefore increased the potential for macromolecule polycondensation between the chemicals and cell wall materials. This research paves the way for improving the fixation rate of impregnated wood and provides new insights into practical applications.

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“…Capsicum incluye una gran variedad de pimientos picantes, cuyos principales atributos sensoriales son color, textura y picor. Los compuestos responsables del picor de los pimientos son los capsaicinoides y diferentes compuestos han sido identificados en este grupo; sin embargo, el con-tenido de la capsaicina es la responsable por el picor de los pimientos (Ziglio et al 2018). Resultados obtenidos a escala de laboratorio indicaron que la oleorresina de un pimiento picante (Capsicum frutescens Mill, "Bhut jolokia") se mostró más efectiva en la protección de Pinus sp.…”

Section: Extractos De Pimientos Y De Partes De áRboles El Génerounclassified

“…y Hymenaea sp. contra al ataque del hongo de pudrición blanda, Paecilomyces variotii Bainier (Ziglio et al 2018). No obstante, son necesarios más estudios en lo que concierne a los efectos de la impregnación de la madera con extractos de pimientos, y las relaciones biodegradacióntiempo y costo-beneficio.…”

Section: Extractos De Pimientos Y De Partes De áRboles El Génerounclassified

Deterioro y preservación de maderas mediante el uso de preservadores naturales de potencial interés en Brasil

Gonçalves

Lahr

2020

Bosque (Valdivia)

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Wettability, surface free energy and cellulose crystallinity for pine wood (Pinus sp.) modified with chili pepper extracts as natural preservatives

Cited by 11 publications

References 38 publications

Durability of the Exterior Transparent Coatings on Nano-Photostabilized English Oak Wood and Possibility of Its Prediction before Artificial Accelerated Weathering

Durability of the Exterior Transparent Coatings on Nano-Photostabilized English Oak Wood and Possibility of Its Prediction before Artificial Accelerated Weathering

Study on Improving the Fixation Rate of Impregnated Poplar Wood with Maltodextrin and 1,3-Dimethylol-4,5-Dihydroxyethyleneurea

Deterioro y preservación de maderas mediante el uso de preservadores naturales de potencial interés en Brasil

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