Preparation and properties of a novel type of tannin-based wood adhesive

Chen, Xinyi; Pizzi, A.; Fredon, Emmanuel; Gérardin, Christine; Li, Jinxing; Zhou, Xiaojian; Du, Guanben

doi:10.1080/00218464.2020.1863215

Cited by 30 publications

(14 citation statements)

References 48 publications

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“…Both condensed polyflavonoid tannins and hydrolysable tannins have already been successfully used as wood composite adhesives [22][23][24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Natural Tannins as New Cross-Linking Materials for Soy-Based Adhesives

et al. 2021

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Human health problems and formaldehyde emission from wood-based composites are some of the major drawbacks of the traditional synthetic adhesives such as urea formaldehyde resins. There have been many attempts to decrease formaldehyde emission and replace urea formaldehyde resins with bio-based adhesives for wood-based composites. Because of some weakness in soy-based adhesive, chemicals have been used as modifiers. Modified soy-based adhesives without any formaldehyde have been successfully used to prepare wood panels. To achieve this, different synthetic cross-linking chemicals such as phenol formaldehyde resins and polyamidoamine-epichlorohydrin were used. However, in reality, what we need are totally green adhesives that use natural materials. In our previous research work, the use of tannins in combination with soy-based adhesives to make wood composites was investigated. Thus, in this research work, the feasibility of using three types of natural tannins (quebracho, mimosa and chestnut tannins) as cross-linking materials for soy adhesive was studied. The chemical bond formation and adhesion behaviors of tannin-modified soy adhesives were also investigated by Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry (MALDI-ToF-MS) and thermo-mechanical analysis (TMA). The results showed that at ambient temperature, both ionic and covalent bonds formed between tannin constituents and amino acids; however, at higher temperature, covalent bonds are largely predominate. Based on the results obtained from the thermo-mechanical analysis, the modulus of elasticity (MOE) of soy adhesive is increased by adding tannins to its formulation. In addition, the chemical bond formation was proved by MALDI-ToF-MS.

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“…Both condensed polyflavonoid tannins and hydrolysable tannins have already been successfully used as wood composite adhesives [22][23][24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Natural Tannins as New Cross-Linking Materials for Soy-Based Adhesives

et al. 2021

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View full text Add to dashboard Cite

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“…92,93 There have been a number of works reported on tannin-based adhesives for particleboard, plywood, and laminated products from the group of Pizzi. 35,[94][95][96] Tannin can be classified as hydrolyzable tannin, and condensed tannin.…”

Section: Reviewmentioning

confidence: 99%

“…101 Several attempts have been made to improve the properties of tannin, blending tannin with polymers or copolymerizing or used as additives to the main resin etc. 35,95,96 The polyphenolic structure of tannin can be engineered through various chemical modifications, such as acylation, esterification, methylolation, etherification etc. 36 Two primary approaches through which condensed tannin can be used to manufacture adhesives are auto-condensation and polycondensation reactions.…”

Section: Chemical Modification Of Tanninmentioning

confidence: 99%

“…65,99 Chen and colleagues developed a wood adhesive from commercial mimosa tannin and glycerol diglycidyl ether (GDE), where GDE acted as a crosslinker. 35 The study evaluated the effect of varying the ratios of tannin and GDE on physical, chemical, and thermal stability along with adhesive performance. Simple preparation of the adhesive included mixing of tannin in water, followed by the addition of GDE.…”

Section: Polycondensation Reaction Of Tannin With Aldehydes or Non-al...mentioning

confidence: 99%

“…32,33 Therefore, with the objective of developing next-generation sustainable adhesives, while hunting for similar suitable materials, which are capable of meeting today's (environmental and health) regulations and exceeding (or meeting) the performance bar set by their hydrocarbon-derived counterparts is critical. With that in mind, tannin is one such material with similar potential and has been thoroughly investigated 34,35 especially to develop sustainable and competent bio-based wood adhesives.…”

Section: Introductionmentioning

confidence: 99%

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