Performance of Unidirectional Biocomposite Developed with Piptadeniastrum Africanum Tannin Resin and Urena Lobata Fibers as Reinforcement

Wedaïna, Achille Gnassiri; Pizzi, A.; Nzie, Wolfgang; Raïdandi, Danwé; Konaï, Noël; Amirou, Siham; Segovia, César; Kueny, Raphaël

doi:10.32604/jrm.2021.012782

Cited by 14 publications

(13 citation statements)

References 28 publications

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“…However, the panels from the E0 emission class are usually characterised by an increased production costs, hence, the industrial and scientific interest is directed at sustainable production of wood-based panels having a close-to-zero formaldehyde content, reaching E0 and super E0 classes, i.e. formaldehyde emissions equivalent to the natural wood levels [19,20]. The use of natural, bio-based adhesives as partial or complete substitutes of the traditional thermosetting resins is a perspective approach to achieve this goal [21][22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Hot-Pressing Regime in the Production of Eco-Friendly Fibreboards Bonded with Hydrolysis Lignin

Valchev

Yordanov

Savov

et al. 2021

Period. Polytech. Chem. Eng.

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This research was aimed at studying the potential of using residual lignin from acid hydrolysis as a binder in manufacturing eco-friendly, dry-process fibreboards. For that purpose, a modification of the adhesive system and hot-pressing regime was conducted. The adhesive system applied was composed of 2 % phenol-formaldehyde (PF) resin and 10 % hydrolysis lignin (based on the dry fibres). The PF resin does not only act as a binder but generally contributes to the even distribution and good retention of the main binder – hydrolysis lignin. A specific hot-pressing cycle was used. In the first stage, the pressure was 1.0 MPa, followed by an increased pressure of 4.0 MPa, and subsequent cooling. The purpose of the initial lower pressure was softening the lignin and reduction of the material moisture content. The effect of the second stage of hot-pressing on the properties of eco-friendly fibreboards was investigated. It was determined that the fibreboards produced with 2 % PF resin and 10 % hydrolysis lignin have similar physical and mechanical properties to those of the control panels, produced with 10 % PF resin at a standard hot-pressing cycle. The findings of this work demonstrate that residual hydrolysis lignin can be effectively utilized as a binder in the production of eco-friendly, dry-process fibreboards with acceptable physical and mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Optimization of the Hot-Pressing Regime in the Production of Eco-Friendly Fibreboards Bonded with Hydrolysis Lignin

Valchev

Yordanov

Savov

et al. 2021

Period. Polytech. Chem. Eng.

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“…About 50% of PUs are now synthesized by using bio-derived polyols. 169–174 Synthesizing isocyanates using fatty acids from vegetable oils and furan derivatives has been reported from the early 1960s. 175–179 These chemicals, however, were still isocyanates, and thus potentially toxic and are not extracted from bio-derived materials.…”

Section: Tannin-based Polyurethane Adhesivesmentioning

confidence: 99%

“…Later, an alternative approach to the preparation of PUs without isocyanates was reported. 180–182 Investigators reported PUs from polyols from several renewable materials like tannin 171,173,183,184 and lignin 185–188 for a wide range of applications. Oxypropylated flavonoid tannins are one such example of a nature-derived polyol, which when reacted with polymeric isocyanate results in PU.…”

Section: Tannin-based Polyurethane Adhesivesmentioning

confidence: 99%

Tannin as a renewable raw material for adhesive applications: a review

et al. 2022

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“…However, the phenolic nature of tannins can be applied in different applications, such as insulating foams, the mineral and wine industry, veterinary medicine, petroleum, and the gas industry [23], as well as in sewage-and corrosionresistant metals [24,25]. Tannins also are used in the wood industry in various applications, such as in biocides, fungicides, and development of tannin-based wood adhesives [26][27][28][29]. They can also quickly synthesize proteins and other polymers for application in medical sciences, such as pectin [30,31].…”

Section: Introductionmentioning

confidence: 99%

Bio-Based Polyurethane Resins Derived from Tannin: Source, Synthesis, Characterisation, and Application

Aristri

Iswanto

Fatriasari

et al. 2021

Forests

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Tannins are soluble, astringent secondary phenolic metabolites generally obtained from renewable natural resources, and can be found in many plant parts, such as fruits, stems, leaves, seeds, roots, buds, and tree barks, where they have a protective function against bacterial, fungal, and insect attacks. In general, tannins can be extracted using hot water or organic solvents from the bark, leaves, and stems of plants. Industrially, tannins are applied to produce adhesives, wood coatings, and other applications in the wood and polymer industries. In addition, tannins can also be used as a renewable and environmentally friendly material to manufacture bio-based polyurethanes (bio-PUs) to reduce or eliminate the toxicity of isocyanates used in their manufacture. Tannin-based bio-PUs can improve the mechanical and thermal properties of polymers used in the automotive, wood, and construction industries. The various uses of tannins need to be put into perspective with regards to possible further advances and future potential for value-added applications. Tannins are employed in a wide range of industrial applications, including the production of leather and wood adhesives, accounting for almost 90% of the global commercial tannin output. The shortage of natural resources, as well as the growing environmental concerns related to the reduction of harmful emissions of formaldehyde or isocyanates used in the production of polyurethanes, have driven the industrial and academic interest towards the development of tannin-based bio-PUs as sustainable alternative materials with satisfactory characteristics. The aim of the present review is to comprehensively summarize the current state of research in the field of development, characterization, and application of tannin-derived, bio-based polyurethane resins. The successful synthesis process of the tannin-based bio-PUs was characterized by Fourier-transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), MALDI-TOF mass spectrometry, and gel permeation chromatography (GPC) analyses.

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Performance of Unidirectional Biocomposite Developed with Piptadeniastrum Africanum Tannin Resin and Urena Lobata Fibers as Reinforcement

Cited by 14 publications

References 28 publications

Optimization of the Hot-Pressing Regime in the Production of Eco-Friendly Fibreboards Bonded with Hydrolysis Lignin

Optimization of the Hot-Pressing Regime in the Production of Eco-Friendly Fibreboards Bonded with Hydrolysis Lignin

Tannin as a renewable raw material for adhesive applications: a review

Bio-Based Polyurethane Resins Derived from Tannin: Source, Synthesis, Characterisation, and Application

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