Curing Characterisation of Spruce Tannin-based Foams using the Advanced Isoconversional Method

Čop, Matjaž; Laborie, Marie Pierre; Pizzi, A.; Šernek, Milan

doi:10.15376/biores.9.3.4643-4655

Cited by 9 publications

(6 citation statements)

References 19 publications

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“…The chemistry of this porous material was also investigated with several spectroscopic techniques to determine the covalent nature of the polymerization between the furfuryl alcohol and the tannin [ 37 , 38 ]. Kinetic studies with iso-conventional methods were also performed for the spruce tannin-furfuryl alcohol foams [ 39 ]. Conversely, for the lignin furanic foams and their polymers, research is still in progress and only preliminary studies were published.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Phenolic Fractions as Basis for Furfuryl Alcohol-Based Co-Polymers and Their Use as Wood Adhesives

et al. 2016

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Furfuryl alcohol is a very interesting green molecule used in the production of biopolymers. In the present paper, the copolymerization in acid environment with natural, easily-available, phenolic derivatives is investigated. The processes of polymerization of the furfuryl alcohol with: (i) spent-liquor from the pulping industry and (ii) commercial tannin from acacia mimosa were investigated though viscometry and IR-spectroscopy. The curing kinetics of the formulations highlighted the importance of the amount of furfuryl alcohol and catalyst as well as the effect of temperature for both phenolic-furanic polymers. Evidence of covalent copolymerization has been observed through infrared spectrometry (FT-IR) combined with principal component analysis (PCA) and confirmed with additional solubility tests. These bio-based formulations were applied as adhesives for solid wood and particleboards with interesting results: at 180 • C, the spent-liquor furanic formulations allow wood bonding slightly with lower performance than PVA in dry conditions, while mixed formulations allow the gluing of particleboard with only satisfactory internal bonding tests.

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Section: Introductionmentioning

confidence: 99%

Sustainable Phenolic Fractions as Basis for Furfuryl Alcohol-Based Co-Polymers and Their Use as Wood Adhesives

et al. 2016

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“…Condensed tannins are the most studied tannins because they can be recovered from many different trees, including mimosa ( Acacia mearnsii ) ( Figure 13 a), spruce ( Picea abies ), pine ( Pinus radiata and Pinus pinaster ), quebracho ( Schinopsis balansae and Schinopsi lorentzii ), and larch ( Larix gmelinii ) [ 166 , 226 , 227 , 228 , 229 ]. Condensed tannins are primarily extracted from barks ( Figure 13 a) and heartwood, which is achieved by first grinding the original material and then extracting them with solvents, usually hot water with sulfites.…”

Section: Tannin–furanic Foams (Tffs)mentioning

confidence: 99%

“…These additives can be of different types, each of which can be used to improve specific properties. The first example is the use of plasticizers to improve the elasticity of the materials, which are usually rigid, by introducing glycerol [ 226 , 246 ]. The plasticizer promotes the sliding of macromolecular chains relative to each other.…”

Section: Tannin–furanic Foams (Tffs)mentioning

confidence: 99%

A Review of Rigid Polymeric Cellular Foams and Their Greener Tannin-Based Alternatives

et al. 2022

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This review focuses on the description of the main processes and materials used for the formulation of rigid polymer foams. Polyurethanes and their derivatives, as well as phenolic systems, are described, and their main components, foaming routes, end of life, and recycling are considered. Due to environmental concerns and the need to find bio-based alternatives for these products, special attention is given to a recent class of polymeric foams: tannin-based foams. In addition to their formulation and foaming procedures, their main structural, thermal, mechanical, and fire resistance properties are described in detail, with emphasis on their advanced applications and recycling routes. These systems have been shown to possess very interesting properties that allow them to be considered as potential substitutes for non-renewable rigid polymeric cellular foams.

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“…The majority of harvested bark is currently used for energy, which is, according to Deppe and Hoffmann (1972) and Gupta et al (2011), not the best solution due its low calorific value and high CO 2 emissions. A smaller amount of bark is used in special applications like horticulture (for landscaping), in pharmacy (Miranda et al, 2012), for leather tanning (Pizzi, 2008), for insulation panels (Kain et al, 2014), foams (Tondi & Pizzi, 2009;Čop et al, 2015), decorative panels for flooring (Tudor et al, 2018), or as a substance to produce fire-resistant wood-based composites for construction purposes (Tondi et al, 2014). Most of the bark obtained in the debarking process in the forest or at a sawmill is unused, however, which creates an industrial and environmental problem.…”

Section: Uvod Introductionmentioning

confidence: 99%

Thermal conductivity of different bio-based insulation materials

Medved¹,

Tudor²,

Barbu³

et al. 2021

les-wood

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To achieve the zero-waste goal as well as sustainability, the use of the raw materials, especially those from nature, and wood in particular, has to be smart, meaning that the resource has to be used to its full potential. Since wood-based industry is associated with high intensity and the generation of a relatively large amount of residues, those residues should be used for the production of useful products, otherwise they will easily be classified as waste and afterwards used as a source of energy. To present a possible solution for wood residues like wood chips, wood particles and bark, we investigated the possibility of using wood and bark residues as constituents for the production of single layer insulation panel with a target thickness of 40 mm and target density of 0.2 g·cm-3. Thermal conductivity was determined using the steady state principle at three different temperature settings. The average thermal conductivities were determined between 49 mW·m-1·K-1 and 74 mW·m-1·K-1. The highest values were determined at boards made from bark, which also had the highest density (0,291 g·cm-3), while the lowest thermal conductivity was observed for boards made from spruce wood particles.

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Curing Characterisation of Spruce Tannin-based Foams using the Advanced Isoconversional Method

Cited by 9 publications

References 19 publications

Sustainable Phenolic Fractions as Basis for Furfuryl Alcohol-Based Co-Polymers and Their Use as Wood Adhesives

Sustainable Phenolic Fractions as Basis for Furfuryl Alcohol-Based Co-Polymers and Their Use as Wood Adhesives

A Review of Rigid Polymeric Cellular Foams and Their Greener Tannin-Based Alternatives

Thermal conductivity of different bio-based insulation materials

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