Reactive UV-absorber and epoxy functionalized soybean oil for enhanced UV-protection of clear coated wood

Olsson, Sara; Johansson, Mats; Westin, Mats; Östmark, Emma

doi:10.1016/j.polymdegradstab.2014.09.017

Cited by 21 publications

(10 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The colour change of SA modified wood was reduced compared to the untreated wood, while the ESO grafted SA modified wood had very low colour change, which on the first observation interval (20 h) was below the threshold for detection by the human eye. An ESO treatment for unmodified wood was previously reported by Olsson et al [41], in an experiment with additional UV absorbing agent, 2-hydroxy-4(2,3-epoxy propoxy)benzophenone (HEPBP), where it showed reduction in colour change on artificial and natural weathering.…”

Section: Chemical Modification With Uv Stabilitymentioning

confidence: 99%

Review of Functional Treatments for Modified Wood

et al. 2021

View full text Add to dashboard Cite

Wood modification is now widely recognized as offering enhanced properties of wood and overcoming issues such as dimensional instability and biodegradability which affect natural wood. Typical wood modification systems use chemical modification, impregnation modification or thermal modification, and these vary in the properties achieved. As control and understanding of the wood modification systems has progressed, further opportunities have arisen to add extra functionalities to the modified wood. These include UV stabilisation, fire retardancy, or enhanced suitability for paints and coatings. Thus, wood may become a multi-functional material through a series of modifications, treatments or reactions, to create a high-performance material with previously impossible properties. In this paper we review systems that combine the well-established wood modification procedures with secondary techniques or modifications to deliver emerging technologies with multi-functionality. The new applications targeted using this additional functionality are diverse and range from increased electrical conductivity, creation of sensors or responsive materials, improvement of wellbeing in the built environment, and enhanced fire and flame protection. We identified two parallel and connected themes: (1) the functionalisation of modified timber and (2) the modification of timber to provide (multi)-functionality. A wide range of nanotechnology concepts have been harnessed by this new generation of wood modifications and wood treatments. As this field is rapidly expanding, we also include within the review trends from current research in order to gauge the state of the art, and likely direction of travel of the industry.

show abstract

Section: Chemical Modification With Uv Stabilitymentioning

confidence: 99%

Review of Functional Treatments for Modified Wood

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Photodegradation is formed by atmospheric oxygen via free radicals. The radicals formed during photodegradation are oxidized to yellow colored quinoid structures or to secondary chromophores which ensure further photodegradation (Leary 1968, Olsson et al 2014, Varganici et al 2021. Photodegradation produces a series of the most damaging effects on untreated wood, therefore coatings (EPR or EPR+PUU coatings) in this study have been used to protect wood surface against discoloration.…”

Section: Colour Testmentioning

confidence: 99%

Some surface characteristics of oriental beech wood impregnated with some fire-retardants and coated wıth polyurea/polyurethane hybrid and epoxy resins

Altay

Toker

Baysal

et al. 2021

Maderas, Cienc. tecnol.

View full text Add to dashboard Cite

This study was made to determine surface characteristics such as colour, gloss, and surface hardness changes of Oriental beech (Fagus orientalis). The wood specimens were firstly impregnated with some fireretardants (FRs) and primed with epoxy resin (EPR) and then coated with polyurethane/polyurea hybrid resin (PUU). Oriental beech was impregnated with 3 % aqueous solution of boric acid (BA), borax (BX), boric acid and borax mixture (1:1), and ammonium sulphate (AS). While Sikafloor®-156 was used for epoxy coating (EPR), Sikalastic®-851 R was used for polyurethane/polyurea hybrid coating (PUU). According to our results, all treatment groups gave negative lightness stability values after accelerated weathering. The colour stability of epoxy resin coated Oriental beech was higher than that of polyurethane/polyurea hybrid resin coated Oriental beech. Except for boric acid impregnated and polyurethane/polyurea hybrid resin coated Oriental beech, all fire-retardants treatment before polyurethane/polyurea hybrid resin and epoxy resin coatings decreased the gloss losses of Oriental beech after accelerated weathering. Fire-retardants impregnation before epoxy resin and polyurethane/polyurea hybrid resin coatings improved the surface hardness values of Oriental beech after accelerated weathering.

show abstract

“…20,23 It was reported that employing the reactive additives containing active groups is a feasible strategy to overcome the aforementioned obstacles. 24 These reactive additives have the ability of bonding with the polymer chains to prevent the migration of additives.…”

Section: Introductionmentioning

confidence: 99%