scholarly journals Bio-Based Wood Adhesive from Camelina Protein (a Biodiesel Residue) and Depolymerized Lignin with Improved Water Resistance

ACS Omega ◽  
2017 ◽  
Vol 2 (11) ◽  
pp. 7996-8004 ◽  
Author(s):  
Xiangwei Zhu ◽  
Donghai Wang ◽  
Ningbo Li ◽  
Xiuzhi Susan Sun
Keyword(s):  
Water Resistance ◽  
Protein A ◽  
Wood Adhesive ◽  
Biodiesel Residue

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.

Investigation of a formaldehyde-free cottonseed flour-based adhesive for interior plywood

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 5546-5557
Author(s):  
Nairong Chen ◽  
Jian Huang ◽  
Kaichang Li
Keyword(s):  
Hot Pressing ◽  
Water Resistance ◽  
Weight Ratio ◽  
Wood Adhesive ◽  
Hot Press ◽  
Cottonseed Flour ◽  
Press Temperature ◽  
Pressing Time ◽  
Effects Of Ph ◽  
Pot Life

A new formaldehyde-free wood adhesive, primarily composed of defatted cottonseed flour (CF) and polyamine-epichlorohydrin (K736) resin, was investigated for the preparation of interior plywood. Sodium hydroxide was an essential component of the adhesive. The effects of pH values of the CF-K736 adhesive, the CF/K736 weight ratio on the pot life of the adhesive, and the water resistance of the resulting plywood panels were investigated in detail. The hot-pressing temperature and time were optimized in terms of the water resistance of the resulting plywood panels. The resulting 5-ply plywood panels met the industrial water resistance requirements for interior application under the following conditions: pH > 11, CF/K736 weight ratio in the range of 8/1 to 5/1, hot-press temperature ≥ 120 °C, and hot-pressing time > 4 min. The pot life of the adhesive was approximately 3 h when the pH was 12 and the CF/K736 weight ratio was 8/1. The curing mechanism of the adhesive is discussed.

Bonding strength and water resistance of starch-based wood adhesive improved by silica nanoparticles

2011 ◽  
Vol 86 (1) ◽  
pp. 72-76 ◽  
Author(s):  
Zhenjiong Wang ◽  
Zhengbiao Gu ◽  
Yan Hong ◽  
Li Cheng ◽  
Zhaofeng Li
Keyword(s):  
Silica Nanoparticles ◽  
Bonding Strength ◽  
Water Resistance ◽  
Wood Adhesive

Preparation and properties of a starch-based wood adhesive with high bonding strength and water resistance

2015 ◽  
Vol 115 ◽  
pp. 32-37 ◽  
Author(s):  
Yanhua Zhang ◽  
Longlong Ding ◽  
Jiyou Gu ◽  
Haiyan Tan ◽  
Libin Zhu
Keyword(s):  
Bonding Strength ◽  
Water Resistance ◽  
Wood Adhesive ◽  
High Bonding Strength

Improvement of the water resistance of poly(vinyl acetate) emulsion wood adhesive

2000 ◽  
Vol 29 (3) ◽  
pp. 152-158 ◽  
Author(s):  
Lijun Qiao ◽  
Allan J. Easteal ◽  
Clive J. Bolt ◽  
Philip K. Coveny ◽  
Robert A. Franich
Keyword(s):  
Vinyl Acetate ◽  
Water Resistance ◽  
Wood 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 Improving Water Resistance of Soy-Protein Wood Adhesive by Using Hydrophilic Additives

BioResources ◽  
2014 ◽  
Vol 10 (1) ◽  
Author(s):  
Minzhi Chen ◽  
Yan Chen ◽  
Xiaoyan Zhou ◽  
Bitao Lu ◽  
Meiping He ◽  
...  
Keyword(s):  
Soy Protein ◽  
Water Resistance ◽  
Wood Adhesive

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.

scholarly journals Performance of a formaldehyde-free sesame protein adhesive modified by urea in the presence and absence of glyoxal

BioResources ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. 3121-3136
Author(s):  
Xiaobo Wei ◽  
Yuxiang Ma ◽  
Xuede Wang
Keyword(s):  
Water Resistance ◽  
Formaldehyde Emission ◽  
Wood Adhesive ◽  
Sesame Oil ◽  
Compact Surface ◽  
Process Industry ◽  
Type Ii ◽  
High Quality Protein ◽  
Sesame Cake

Sesame cake and meal, byproducts of the sesame oil process industry and mainly used as feed and fertilizer, are often not optimally utilized and are wasted when the material could be used as a high-quality protein source. This research primarily emphasizes the preparation of a sesame protein-based adhesive with urea and glyoxal modification to use as a wood adhesive. The performance and characterization of the urea and glyoxal modified sesame protein adhesive (USP and GUSP, respectively) were measured precisely. After glyoxal was added, the water resistance of the GUSP adhesive was significantly enhanced, reaching the standard for Type II plywood. The formaldehyde emission test showed that the GUSP adhesive could be utilized as a formaldehyde-free wood adhesive, having a significantly lower than the demand of the E0 level (i.e., 0.5 mg/L). Furthermore, increasing the glyoxal content in the adhesives enhanced the thermal stability but not significantly. A substance with a crosslinking structure was formed from the reaction between the sesame protein and glyoxal, which enhanced the water resistance. Meanwhile, the fractured structure of the GUSP adhesive having a compact surface also was propitious to enhance the water resistance. Thus, the GUSP adhesive could be used as a novel adhesive in plywood fabrication.

scholarly journals A Novel Eco-Friendly Wood Adhesive Composed by Sucrose and Ammonium Dihydrogen Phosphate

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1251 ◽  
Author(s):  
Zhongyuan Zhao ◽  
Shin Hayashi ◽  
Wei Xu ◽  
Zhihui Wu ◽  
Soichi Tanaka ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Resistance ◽  
Reaction Pathway ◽  
Wood Adhesive ◽  
Actual State ◽  
Dihydrogen Phosphate ◽  
Ammonium Dihydrogen Phosphate ◽  
Thermal Thresholds ◽  
Bonding Properties ◽  
Ft Ir

Development of a bio-based wood adhesive is a significant goal for several wood-based material industries. In this study, a novel adhesive based upon sucrose and ammonium dihydrogen phosphate (ADP) was formulated in hopes of furthering this industrial goal through realization of a sustainable adhesive with mechanical properties and water resistance comparable to the synthetic resins used today. Finished particleboards exhibited excellent mechanical properties and water resistance at the revealed optimal adhesive conditions. In fact, the board properties fulfilled in principle the requirements of JIS A 5908 18 type standard, however this occured at production conditions for the actual state of development as reported here, which are still different to usual industrial conditions. Thermal analysis revealed addition of ADP resulted in decreases to the thermal thresholds associated with degradation and curing of sucrose. Spectral results of FT-IR elucidated that furanic ring chemistry was involved during adhesive curing. A possible polycondensation reaction pathway was proposed from this data in an attempt to explain why the adhesive exhibited such favorable bonding properties.

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