Mechanical and water-resistant properties of rice straw fiberboard bonded with chemically-modified soy protein adhesive

Zhang, Wanrong; Sun, Hongwei; Zhu, Chao; Wan, Kai; Zhang, Yu; Fang, Zhengping; Ai, Zhaoquan

doi:10.1039/c7ra12875d

Cited by 25 publications

(18 citation statements)

References 28 publications

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“…The peaks of several adhesives at these positions are consistent, and even the peaks intensity show basically no differences. Obviously, the absorption peak which was observed at 1657, 1542 and 1242 cm −1 in the figure belong to C=O stretching vibration (amide I), N-H bending vibration (amide II), N-H in plane and C-N stretching vibration (amide III) [21], respectively. Combined with Fig.…”

Section: Ftir Analysismentioning

confidence: 93%

MALDI ToF Investigation of the Reaction of Soy Protein Isolate with Glutaraldehyde for Wood Adhesives

Zhang¹,

Pizzi²,

Lei³

et al. 2023

Journal of Renewable Materials

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Soy protein adhesives are currently a hot research topic in the wood panels industry for the abundant raw material reserves, reasonable price and outstanding environmental features. But their poor water resistance, low bonding strength and intolerance to mold are major drawbacks, so that proper modification before use is essential. Glutaraldehyde is one of the more apt cross-linking agents for soybean protein adhesives, which can effectively improve the bonding strength and water resistance of the adhesive. Equally, glutaraldehyde is also an efficient and broad-spectrum fungicide that can significantly improve the anti-fungal properties of a soy protein adhesive. In the work presented here, matrix assisted laser desorption ionization (MALDI-ToF) mass spectrometry and Fourier transform infrared spectroscopy techniques were used to analyze the reaction mechanism of glutaraldehyde cross-linking soybean protein. The results confirmed the reaction of the aldehyde group with amino groups of the side chains and the amide groups of the peptide linkages constituting the skeletal chain of the protein.The laboratory plywood and particleboard bonded with glutaraldehyde-soy bean protein adhesives were prepared to determine the adhesive bonding properties, the dry strength, 24 h cold water soaking wet strength and 3 h hot water (63°C) wet strength of plywood were 2.03, 1.13 and 0.75 MPa, respectively, which satisfied the requirements of industrial production.

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Section: Ftir Analysismentioning

confidence: 93%

MALDI ToF Investigation of the Reaction of Soy Protein Isolate with Glutaraldehyde for Wood Adhesives

Zhang¹,

Pizzi²,

Lei³

et al. 2023

Journal of Renewable Materials

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“…Adding the modified protein to the glue line improves the intimated contacts of the adhesive with the surface fibers. It was determined that applying modified protein can provide increments of properties of the MDF due to the formation of straightened fiber and its ordered distribution after hot press processing, so that fibers were composed closely and coated fully by the adhesive [34]. Modified protein is a hydrophilic compound and can absorb a higher amount of water.…”

Section: Sem Analysismentioning

confidence: 99%

Modeling the Bending Strength of MDF Faced, Polyurethane Foam-Cored Sandwich Panels Using Response Surface Methodology (RSM) and Artificial Neural Network (ANN)

Nazerian

Naderi

Partovinia

et al. 2021

Forests

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The present study evaluates and compares predictions on the performance and the approaches of the response surface methodology (RSM) and the artificial neural network (ANN) so to model the bending strength of the polyurethane foam-cored sandwich panel. The effect of the independent variables (formaldehyde to urea molar ratio (MR), sandwich panel thickness (PT) and the oxidized protein to melamine-urea-formaldehyde synthesized resin weight ratio (WR)) was examined based on the bending strength by the central composite design of the RSM and the multilayer perceptron of the ANN. The models were statistically compared based on the training and validation data sets via the determination coefficient (R2), the root mean squares error (RMSE), the absolute average deviation (AAD) and the mean absolute percentage error (MAPE). The R2 calculated for the ANN and the RSM models was 0.9969 and 0.9960, respectively. The models offered good predictions; however, the ANN model was more precise than the RSM model, thus proving that the ANN and the RSM models are valuable instruments to model and optimize the bending properties of the sandwich panel.

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“…Figure 2 shows the X-ray diffraction patterns and the corresponding crystallinity used to identify the multiple crosslinking interactions in the protein adhesive. The characteristic peaks at 2θ of approximately 9 • and 19.6 • represented the α-helix and β-sheet structures of protein secondary conformations, respectively [33]. After the incorporation of Ca 2+ or Zn 2+ , the peak at approximately 9 • almost disappeared and the peak at 19.6 • showed obvious decrement and faintly shifted to a lower degree, which revealed that the multiple interactions effectively disrupted the protein conformation after forming coordination bond and intermolecular H-bonds.…”

Section: Design Synthesis and Characterization Of Soybean Meal And mentioning

confidence: 99%

A Tough and Mildew-Proof Soybean-Based Adhesive Inspired by Mussel and Algae

Bai

Liu

2020

Polymers

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Despite the recent advances in protein-based adhesives, achieving strong adhesion and mold resistance in wet environment is challenging. Herein, a facile fabrication technology of preparing tough bio-adhesive by incorporating soybean meal and blood meal is presented. Inspired by the marine mussel byssi and brown algae, metal coordination was introduced into a loosely bound protein system to construct multiple chemical cross-linking networks. Mixed alkali-modified blood meal (mBM) was mixed with soybean meal, then 1,6-hexane dioldiglycidyl ether (HDE) and zinc ion were introduced to fabricate soybean meal and blood meal-based adhesives. The attained adhesives exhibited good thermal stability, water resistance (the wet shear strength is 1.1 MPa), and mold resistance, with appropriate solid content (34.3%) and relatively low moisture uptake (11.9%). These outstanding performances would be attributed to the reaction of 1,6-hexane dioldiglycidyl ether with protein to form a preliminary cross-linking network; subsequently, the coordination of zinc ions with amino or carboxyl strengthened and toughened the adhesive. Finally, the calcium ions gelled the adhesives, providing cohesion force and making the network structure more compact. This study realized the value-added utilization of protein co-products and developed a new eco-friendly bio-based adhesive.

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Mechanical and water-resistant properties of rice straw fiberboard bonded with chemically-modified soy protein adhesive

Abstract: In this work, rice straw and soy protein were used to make fiberboard which may replace wood fiberboard.

Cited by 25 publications

References 28 publications

MALDI ToF Investigation of the Reaction of Soy Protein Isolate with Glutaraldehyde for Wood Adhesives

MALDI ToF Investigation of the Reaction of Soy Protein Isolate with Glutaraldehyde for Wood Adhesives

Modeling the Bending Strength of MDF Faced, Polyurethane Foam-Cored Sandwich Panels Using Response Surface Methodology (RSM) and Artificial Neural Network (ANN)

A Tough and Mildew-Proof Soybean-Based Adhesive Inspired by Mussel and Algae

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