Characterization of a formaldehyde-free cornstarch-tannin wood adhesive for interior plywood

Moubarik, Amine; Allal, Ahmed; Pizzi, A.; Charrier, Fatima; Charrier, Bertrand

doi:10.1007/s00107-009-0379-0

Cited by 100 publications

(52 citation statements)

References 23 publications

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“…Results show the double effects of the temperature, (water evaporation and activation of polymerization). Moubarik et al (2010b) have demonstrated that the cornstarch-tannin adhesives have a rheological behaviour of a gel. Figure 3.…”

Section: Figure 1 Time Evolution Of Storage Modulus (G') and Loss Momentioning

confidence: 99%

Preparation and Mechanical Characterization of Particleboard Made From Maritime Pine and Glued With Bio-Adhesives Based on Cornstarch and Tannins

Moubarik

Allal

Pizzi³

et al. 2010

Maderas, Cienc. tecnol.

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In this presented work, we describe the development and characterization of a new, environmentally friendly adhesive derived from cornstarch and tannins. The production of wood composites mainly relies on the petrochemical-based and formaldehyde-based adhesives such as urea formaldehyde (UF), phenol formaldehyde (PF) and melamine urea formaldehyde (MUF), which can generate under certain conditions, problems for health and environment. The aim of our work is to replace totally these synthetic resins. In order to evaluate the quality of cornstarch-tannin adhesives, particleboards were produced and physical and mechanical properties were investigated. These physical properties included rheological, thermogravimetric analysis and solid phase 13 C NMR analysis of resins. Internal bond, surface soundness, modules of rupture and modulus of elasticity mechanical properties of particleboards bonded with cornstarch-tannin adhesives were also determined.Particleboards bonded with formaldehyde-free cornstarch-tannin adhesive showed comparable mechanical properties to the panels made with the commercial UF resins and satisfied the exigencies of panels for interior fittings used in dry medium (P2) according to European norms EN 312 (2004). Beyond 4 hours, rheological characterization show excellent structural stability of cornstarch-tannin adhesive.

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Section: Figure 1 Time Evolution Of Storage Modulus (G') and Loss Momentioning

confidence: 99%

Preparation and Mechanical Characterization of Particleboard Made From Maritime Pine and Glued With Bio-Adhesives Based on Cornstarch and Tannins

Moubarik

Allal

Pizzi³

et al. 2010

Maderas, Cienc. tecnol.

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“…Maritime pine (Pinus pinaster) veneer was provided by the sawmill -Ets Labadie (Roquefort -France) Sd (moisture content around 8-10%). [16,17] To prepare 500 g of adhesive, a 65% (w/v) corn starch water solution was prepared by dissolving 130 g of corn starch in 200 ml of deionised water and stirred at room temperature, to which 13 g of mimosa tannin are added. Hardener content used was 5% hexamine by weight on tannin extract solids content.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The spread rate of corn starch-tannin adhesive was 120-150 g/m 2 on a dry weight basis [16,17,[25][26][27]. Two adhesive-coated veneer boards were lapped together with the grain parallel to each other and then pressed at 0.45 MPa [16,17,25]. The press temperature and press time were fixed at 170 • C and 4 min respectively.…”

Section: Sample Preparation and Mechanical Testingmentioning

confidence: 99%

“…Further research and developments in the field of fortified starch adhesives with mimosa tannin were carried out in South Africa [14] and the industrial production of one such system was started in South Africa in the late 1970's [15]. Based on our previous results, the overall quality performance of corn starch and mimosa tannin appeared to be acceptable as a wood adhesive [16,17], but their high viscosity posed a serious problem for use in industry. The current industrial adhesives have a viscosity between 0.1 and 2 Pa s and our natural adhesives have a viscosity between 1000 and 100 000 Pa s. Thus in order to use these natural adhesives in industry, it is necessary to decrease this viscosity.…”

Section: Introductionmentioning

confidence: 99%

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Shear Refinement of Formaldehyde-Free Corn Starch and Mimosa Tannin (Acacia mearnsii) Wood Adhesives

Moubarik

Caussé

Poumadere

et al. 2011

Journal of Adhesion Science and Technology

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The aim of this work was to reduce the viscosity of formaldehyde-free corn starch-mimosa tannin wood adhesives, without adversely affecting the mechanical properties of the product. The reduction of viscosity was achieved using shear refinement. The study focused on the physical phenomena before cross-linking of the wood adhesive. The physical (rheological characterization) and mechanical (bond strength) properties of formaldehyde-free corn starch and mimosa tannin wood adhesives were measured.The results showed that the shear refinement (290 rpm and 5 min, optimal conditions) reduced the viscosity of the corn starch-mimosa tannin wood adhesives (from 100 000 to 458 Pa s) with the advantage of being stable over time. Mechanical tests showed that the shear refinement did not influence the mechanical properties of corn starch-mimosa tannin wood adhesives.

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“…As a result, there is an urgent need for a development of formaldehyde-free wood adhesive. Significant efforts have been performed to reduce or replace formaldehyde contents in adhesive formulations [3][4][5][6][7] or to develop adhesives from natural materials [8][9][10][11][12] . Although some of these new adhesives have already been used in industrial application, their supply is limited which may be caused by the high modification cost and some of their bad properties, for example, their poor waterresistance.…”

Section: Introductionmentioning

confidence: 99%

Research on hot-press factors of poplar veneer/disposable plastic film plywood

Fang

Chen

Guo

et al. 2012

Proceedings of 2012 International Conference on Biobase Material Science and Engineering

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The main object of this study was to evaluate the feasibility of using disposable plastic film as a novel wood adhesive in the plywood production, which is done to eliminate formaldehyde release during plywood production and use. The bonding strength of plastic film was determined by testing the strength of three-layer plywood. The results showed plywood bonded with them all met the Chinese National standard (GB/T 17657-1999) for second grade plywood and the highest tensile shear strength was obtained under the pressing conditions of 0.7 MPa, 160℃ and 1min mm -1 with the spread volume of 123.22 g/m 2 . In addition, pressing temperature has a notable effect on adhesive penetration and bonded joints forming.

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Characterization of a formaldehyde-free cornstarch-tannin wood adhesive for interior plywood

Cited by 100 publications

References 23 publications

Preparation and Mechanical Characterization of Particleboard Made From Maritime Pine and Glued With Bio-Adhesives Based on Cornstarch and Tannins

Preparation and Mechanical Characterization of Particleboard Made From Maritime Pine and Glued With Bio-Adhesives Based on Cornstarch and Tannins

Shear Refinement of Formaldehyde-Free Corn Starch and Mimosa Tannin (Acacia mearnsii) Wood Adhesives

Research on hot-press factors of poplar veneer/disposable plastic film plywood

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