Rheological Characterization of a Wood Adhesive Based on a Hydrolyzed Soy Protein Suspension

Bacigalupe, Alejandro; Cova, Mariajose; Cedrés, Juan Pablo; Cancela, Guillermo Ezequiel; Escobar, Mariano

doi:10.1007/s10924-020-01784-x

Cited by 11 publications

(3 citation statements)

References 54 publications

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“…The viscosity of soybean protein-based adhesives decreased as the shear rate increased. It was indicated that the adhesives with or without CBE are the non-Newtonian fluid with shear thinning behavior [ 30 ]. At a consistent shear rate, the viscosity had followed a similar decreased tendency as the content of CBE increased, i.e., a sharp decrease in the initial viscosity was observed in the adhesives with CBE addition, while the pH of the adhesives fluctuated only within ± 0.25 ( Figure 7 b), which probably was caused by the CBE with a small molecular weight.…”

Section: Resultsmentioning

confidence: 99%

An Eco-Friendly Wood Adhesive Consisting of Soybean Protein and Cardanol-Based Epoxy for Wood Based Composites

Zhu

Zhang

et al. 2022

Polymers

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Formaldehyde-derived wood adhesives have dominated in woody composites production up to now, while facing a significant challenge in non-renewable raw materials and the formaldehyde emission. To solve these problems, an eco-friendly soybean protein-based wood adhesive was explored via the addition of renewable cardanol based epoxy (CBE) as cross-linking agent. The curing mechanism and viscosity of the adhesives were investigated and the bonding performance was evaluated with three-ply plywood. Fourier transformed infrared spectroscopy (FTIR) analysis confirmed the formation of new ether linkages and the consumption of epoxy groups in the cured adhesives, thereby improving the thermal stabilities and cohesion. Plywood bonded with the CBE-modified soybean protein-based adhesive reached the maximum wet shear strength of 1.11 MPa (4 wt.% CBE addition), a 48% increase compared to the control, whereas the viscosity of adhesive decreased by 68.2%. The wet shear strength of the plywood met the requirements of the Chinese National Standard GB/T 9846-2015 for interior plywood application. The formaldehyde-free adhesive with excellent water resistance adhesiveness performance shows great potential in woody composites as an alternative to formaldehyde derived wood adhesives.

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Section: Resultsmentioning

confidence: 99%

An Eco-Friendly Wood Adhesive Consisting of Soybean Protein and Cardanol-Based Epoxy for Wood Based Composites

Zhu

Zhang

et al. 2022

Polymers

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“…Finally, all of the other bands expected on both the pure matrix and the composites are shown in Figure 9; these are stretch in the hydrocarbon groups commonly found in PU resin [52,56,57] and the groups found on lignocellulosic materials such as hydroxyls and other functional groups associated with It is not common to find the FTIR spectra of commercial OSB and materials to be alike. In fact, most of the studies carried out on such materials are regarding the influence of thermic treatments on the studied material [59,60]. Moreover, it is very hard to detect exactly what kind of polymer is used as matrix for such composites.…”

Section: Fourier Transform Infrared Spectroscopymentioning

confidence: 99%

Properties of Luffa Cylindrica Mats Reinforced Castor Oil-Based Polyurethane Composite as an Alternative for Oriented Strand Board

et al. 2022

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The main objective of this work was to produce and characterize a novel ecofriendly castor oil-based polyurethane (COPU) matrix composite reinforced by Luffa cylindrica mats, luffa for short, to be used as panels, as an alternative to oriented strand board (OSB). To do so, the mechanical behavior was evaluated by tree point flexural, perpendicular o surface tensile, screw pullout, and impact tests that were carried on the novel composite along with the neat matrix. Furthermore, the physical characteristics, the thermomechanical behavior, and the functional groups of the materials were observed by water absorption and thickness swelling tests along with dilatometry and Fourier transform infrared spectroscopy (FTIR). A comparison with commercialized OSB was also performed for control. The luffa/COPU composite was prepared by hand lay-up with 48 vol% of luffa mats incorporated as the maximum allowed by the mold under the available resources for manufacturing. The luffa fibers acted as a good reinforcement for the COPU matrix, where the flexural strength and modulus of elasticity were increased by more than 23 and 10 times, respectively, and the other mechanical properties more than doubled for the composites compared to the neat COPU resin. In general, the composite presented a lower performance compared to the commercial OSB, with the impact results being the exception. The water absorption and thickness swallowing results showed an already-expected behavior for the studied materials, where the better performance was found for the hydrophobic neat resin. The FTIR revealed that there was little interaction between luffa and COPU resin, which can be translated to a weak interface between these materials. However, the mechanical behavior, together with the other results presented by the luffa/COPU composite, confirm it is more than enough to be used as civil construction panels such as OSB.

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“…In the future, coal will still play a major energy role in China. North China is China's main coal mining area, and the coal produced is stacked in open-air coal storage yards [1][2][3][4]. Due to the cold and dry climate and strong wind in northern China, it is easy for coal dust piled in the open air to be blown by the wind, forming a source of air pollution [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Preparation and performance characterization of a new dust suppressant with a cross-linked network structure for use in open-pit coal mines

Zhang

et al. 2021

Environ Sci Pollut Res

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In an effort to control dust pollution in open-air environments such as pit coal mines and coal transportation systems, a new dust suppressant with a cross-linked network structure was prepared. Graft copolymerization of soy protein isolate (SPI) and methacrylic acid (MAA), using potassium persulfate (KPS) as the initiator and hexametaphosphoric acid (SHMP) as the cross-linking agent, formed the network structure. The optimal MAA/SPI mass ratio for the dust suppressant was determined through a single factor experiment to be 3:4, with 0.8 and 0.2 g of SHMP and KPS, respectively. The grafting reaction required 30 min at 60 ℃. Scanning electron microscopy, energy-dispersive x-ray spectroscopy, Fourier-transform infrared spectroscopy, and differential scanning calorimetry were used to characterize the structure and application performance of the dust suppressant. The experimental results showed that the graft copolymerization reaction successfully formed the desired cross-linked network, and that when the cross-linked network material was sprayed on coal dust it formed a dense, solidi ed shell, which effectively resisted wind erosion and served as a dust suppressant. The average reduction of the total suspended particulate matter of an open-air coal pile reached 79.95%, demonstrating effective dust suppression.

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Rheological Characterization of a Wood Adhesive Based on a Hydrolyzed Soy Protein Suspension

Cited by 11 publications

References 54 publications

An Eco-Friendly Wood Adhesive Consisting of Soybean Protein and Cardanol-Based Epoxy for Wood Based Composites

An Eco-Friendly Wood Adhesive Consisting of Soybean Protein and Cardanol-Based Epoxy for Wood Based Composites

Properties of Luffa Cylindrica Mats Reinforced Castor Oil-Based Polyurethane Composite as an Alternative for Oriented Strand Board

Preparation and performance characterization of a new dust suppressant with a cross-linked network structure for use in open-pit coal mines

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