A sepiolite-based united cross-linked network in a soybean meal-based wood adhesive and its performance

RSC Advances ◽  
2016 ◽  
Vol 6 (51) ◽  
pp. 45158-45165 ◽  
Author(s):  
Xiaona Li ◽  
Jianlin Luo ◽  
Qiang Gao ◽  
Jianzhang Li
Keyword(s):  
Soybean Meal ◽  
Water Resistance ◽  
Adhesive System ◽  
Wood Adhesive

In this study, the sepiolite was initially treated with KH-560 and then introduced into the soybean meal/triglycidylamine adhesive system to form a united cross-linked network to improve the water resistance of the resultant adhesive.

An eco-friendly wood adhesive from soy protein and lignin: performance properties

RSC Advances ◽  
2015 ◽  
Vol 5 (122) ◽  
pp. 100849-100855 ◽  
Author(s):  
Jing Luo ◽  
Jianlin Luo ◽  
Cheng Yuan ◽  
Wei Zhang ◽  
Jianzhang Li ◽  
...  
Keyword(s):  
Soy Protein ◽  
Soybean Meal ◽  
Water Resistance ◽  
Low Cost ◽  
Wood Adhesive ◽  
Performance Properties

The aim of this study was to improve the water resistance of a soybean meal-based adhesive with a low-cost lignin-based resin (LR).

scholarly journals Soybean Meal-Based Wood Adhesive Enhanced by Phenol Hydroxymethylated Tannin Oligomer for Exterior Use

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 758
Author(s):  
Mingsong Chen ◽  
Yi Zhang ◽  
Yue Li ◽  
Sheldon Q. Shi ◽  
Jianzhang Li ◽  
...  
Keyword(s):  
Soybean Meal ◽  
Water Resistance ◽  
Moisture Absorption ◽  
Formaldehyde Emission ◽  
Wood Adhesive ◽  
Solid Wood ◽  
Solid Content ◽  
Mass Ratio ◽  
Residual Rate ◽  
Synthetic Adhesives

Bio-based adhesives have low water resistance and they are less durable than synthetic adhesives, which limits their exterior applications. In this study, a bio adhesive was developed from soybean meal and larch tannin that was designed for exterior use. Phenol hydroxymethylated tannin oligomer (PHTO) was synthesized and then mixed with soybean meal flour in order to obtain a soybean meal-based adhesive (SPA). The results showed that the moisture absorption rate, residual rate, and solid content of SPA with 10 wt % PHTO (mass ratio with respect to the entire adhesive) were improved by 22.8%, 11.6%, and 6.8%, respectively, as compared with that of pure SPA. The wet shear strength of plywood with SPA with 10 wt % PHTO (boiling in 100 °C water for 3 h) was 1.04 MPa when compared with 0 MPa of pure SPA. This met the bond strength requirement of exterior-use plywood (GB/T 9846.3-2004). This improved adhesive performance was mainly due to the formation of a crosslinked structure between the PHTO and the protein and also PHTO self-crosslinking. The formaldehyde emission of the resulting plywood was the same as that of solid wood. The PHTO-modified SPA can potentially extend the applications of SPAs from interior to exterior plywood.

Glutaraldehyde-modified MUF adhesive system – Improved hot water resistance

2006 ◽  
Vol 65 (3) ◽  
pp. 251-253 ◽  
Author(s):  
M. L. Mamiński ◽  
J. Pawlicki ◽  
A. Zado ◽  
P. Parzuchowski
Keyword(s):  
Water Resistance ◽  
Adhesive System ◽  
Hot Water

scholarly journals Improved Water Resistance of Soybean Meal-based Adhesive with SDS and PAM

BioResources ◽  
2014 ◽  
Vol 9 (3) ◽  
Author(s):  
Haixin Xu ◽  
Jing Luo ◽  
Qiang Gao ◽  
Shifeng Zhang ◽  
Jianzhang Li
Keyword(s):  
Soybean Meal ◽  
Water Resistance

Preparation and Characterization of Silicate Wood Adhesive Modified with Ammonium Stearate

2014 ◽  
Vol 1033-1034 ◽  
pp. 1048-1053 ◽  
Author(s):  
Xin Li Zhang ◽  
Hong Hui Zhang ◽  
Yi Qiang Wu ◽  
Yun Chu Hu
Keyword(s):  
Bonding Strength ◽  
Water Resistance ◽  
Wood Adhesive ◽  
National Standard ◽  
Adhesion Properties ◽  
Good Thermal Stability ◽  
Thermo Gravimetric Analyzer ◽  
Infrared Spectrometer ◽  
Grade Ii

In order to improve the water resistance of silicate wood adhesive, a kind of silicate adhesive was prepared from water glass with silica as curing agent, and ammonium stearate as modifier. The chemical structure, surface morphology and thermal properties of the silicate adhesive were characterized by Fourier transform infrared spectrometer, scanning electron microscope, and thermo-gravimetric analyzer. As the two main measures of adhesion properties, the bonding strength and water resistance were also determined. The results showed that ammonium stearate was successfully introduced into the molecule structure of silicate, the silicate adhesive have good thermal stability in the range of 30~800 °C and the modified silicate adhesive had more smooth cured morphology. The bonding strength and 24h water absorption rate of poplar plywood glued by the silicate adhesive was 0.71 MPa and 22.81%, respectively, reaching the grade II of plywood performance's national standard.

scholarly journals Synthesis and Characterization of Sucrose and Ammonium Dihydrogen Phosphate (SADP) Adhesive for Plywood

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1909 ◽  
Author(s):  
Zhongyuan Zhao ◽  
Shijing Sun ◽  
Di Wu ◽  
Min Zhang ◽  
Caoxing Huang ◽  
...  
Keyword(s):  
Time Course ◽  
Soybean Protein ◽  
Adhesive System ◽  
Wood Adhesive ◽  
Solid Content ◽  
Dihydrogen Phosphate ◽  
Ammonium Dihydrogen Phosphate ◽  
Renewable Materials ◽  
High Solid ◽  
Low Viscosity

The development of eco-friendly adhesives for wood composite products has been a major topic in the field of wood science and product engineering. Although the research on tannin-based and soybean protein-based adhesives has already reached, or at least nears, industrial implementation, we also face a variety of remaining challenges with regards to the push for sustainable adhesives. First, petroleum-derived substances remain a pre-requisite for utilization of said adhesive systems, and also the viscosity of these novel adhesives continues to limit its ability to serve as a drop-in substitute. Within this study, we focus upon the development of an eco-friendly plywood adhesive that does not require any addition of petroleum derived reagents, and the resultant liquid adhesive has both high solid contents as well as a manageably low viscosity at processing temperatures. Specifically, a system based on sucrose and ammonium dihydrogen phosphate (ADP) was synthesized into an adhesive with ~80% solid content and with viscosities ranging from 480–1270 mPa·s. The bonding performance of all adhesive-bound veneer specimens satisfied GB/T 9846-2015 standard at 170 °C hot pressing temperature. To better explain the system’s efficiency, in-depth chemical analysis was performed in an effort to understand the chemical makeup of the cured adhesives as well as the components over the time course of curing. Several new structures involving the fixation of nitrogen speak to a novel adhesive molecular network. This research provides a possibility of synthesizing an eco-friendly wood adhesive with a high solid content and a low viscosity by renewable materials, and this novel adhesive system has the potential to be widely utilized in the wood industry.

A new soybean meal-based bioadhesive enhanced with 5,5-dimethyl hydantoin polyepoxide for the improved water resistance of plywood

RSC Advances ◽  
2015 ◽  
Vol 5 (77) ◽  
pp. 62957-62965 ◽  
Author(s):  
Jing Luo ◽  
Chenchen Li ◽  
Xiaona Li ◽  
Jianlin Luo ◽  
Qiang Gao ◽  
...  
Keyword(s):  
Soybean Meal ◽  
Water Resistance ◽  
Water Soluble

The primary goal of this study is to improve the water resistance of a soybean meal-based bioadhesive and its resultant plywood with water-soluble 5,5-dimethyl hydantoin polyepoxide (DMHP).

A new soy flour-polyepoxide adhesive system for making interior plywood

Holzforschung ◽  
2012 ◽  
Vol 66 (4) ◽  
Author(s):  
Jian Huang ◽  
Chunhong Li ◽  
Kaichang Li
Keyword(s):  
Water Resistance ◽  
Crosslinking Agent ◽  
Environmentally Friendly ◽  
Adhesive System ◽  
Soy Flour ◽  
Renewable Materials ◽  
Yellow Poplar ◽  
Crosslinking Agents

Abstract In this study, triglycidylamine (TGA) was synthesized and evaluated as a crosslinking agent for soy flour (SF) for making five-ply plywood from yellow poplar. Glycerol polyglycidyl ether (GPE) and trimethylolpropane triglycidyl ether (TTE) were also investigated as crosslinking agents for SF as adhesive for plywood. The plywood panels bonded with SF-TGA and SF-GPE adhesives did meet and those with SF-TTE adhesive did not meet the water-resistance requirement for interior application. The former two adhesives are formaldehyde-free, environmentally friendly, easy to use and readily available. They can be derived completely from renewable materials. The adhesion mechanisms are discussed in detail.

scholarly journals A Tough, Water-Resistant, High Bond Strength Adhesive Derived from Soybean Meal and Flexible Hyper-Branched Aminated Starch

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1352 ◽  
Author(s):  
Yi Zhang ◽  
Jieyu Zhang ◽  
Mingsong Chen ◽  
Jing Luo ◽  
Sheldon Q. Shi ◽  
...  
Keyword(s):  
Bond Strength ◽  
Soybean Meal ◽  
Water Resistance ◽  
Crosslinking Agent ◽  
Crosslinking Density ◽  
Chain Structure ◽  
High Bond ◽  
High Bond Strength ◽  
Branched Structure ◽  
Long Chain

Soybean meal (SM)-based adhesive exhibited a great potential to replace petroleum-derived ones to alleviate the energy crisis and eliminate carcinogenic formaldehyde. However, the bad water resistance (caused by low crosslinking density) and inherent brittleness of SM adhesive severely hindered its application. However, improving crosslinking density is generally accompanied by a toughness reduction of the adhesive. Herein, we developed a flexible long-chain starch with a hyper-branched structure (HD), and incorporated it with SM and a crosslinking agent to prepare a novel SM adhesive. Results showed that this adhesive exhibited both excellent water resistance and enhanced toughness. The wet bond strength of plywood fabricated using this adhesive was 354.5% higher than that of SM adhesive. These achievements are because introducing HD with hyper-branched groups enhanced crosslinking density, while HD’s flexible long-chain structure improved toughness of the adhesive. This HD can promote the development of tough and hydrophobic bio-based composites.

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