Properties of soybean-flour-based adhesives enhanced by attapulgite and glycerol polyglycidyl ether

Preparation and characterization of poly(vinyl alcohol) and 1,2,3‐propanetriol diglycidyl ether incorporated soy protein isolate‐based films

“…The WCA decrease in the PTGE/PVA modified films resulted from more hydrophilic groups formed in the crosslinking reaction . The results are consistent with our previous studies …”

Physicochemical properties of modified soybean-flour adhesives enhanced by carboxylated styrene-butadiene rubber latex

“…A lower solid content indicates that a larger amount of water has to be eliminated from the wood adhesive, which could result in damage during the hot-pressing process [22]. With more water content, the temperature of the glue line could not increase rapidly, and as a result, the adhesive could fail to cure completely.…”

“…The modification of soy proteins aims to improve the functional properties by altering their molecular structure or conformation at the secondary, tertiary, and quaternary levels using physical, chemical, or enzymatic agents [5,17,18]. The adhesion properties of soy protein adhesives can be improved via the use of denaturants, reducing agents, or cross-linking agents as well as via enzyme hydrolysis [19][20][21][22][23]. However, their overall performance is still inferior to the petroleum-based adhesives, especially in terms of wet adhesion strength.…”

Soybean meal-based wood adhesive enhanced by ethylene glycol diglycidyl ether and diethylenetriamine

“…4a). These holes could be caused by the gasification of water in the adhesive during hot pressing, and moisture was easily intruded into these holes in the cured adhesive layer and broke the bonding, so that, the wet shear strength was low (Li et al, 2014). After the incorporation of SDS, fewer holes were observed on the fracture surface of the cured adhesive B (Fig.…”

“…Alkali (Nordqvist et al, 2010), urea (Li et al, 2014), and sodium dodecyl sulfate (SDS) (Wang et al, 2005) are used to break the structure of soy protein molecules and expose inner hydrophobic groups to improve the water resistance of the resultant adhesive, however, the wet shear strength of the plywood bonded by the adhesive does not meet the interior use plywood requirement (≥0.7 MPa), since the soy protein molecules also contain many hydrophilic groups, such as NH 2 , COOH, and OH. The second one is the cross-linking agent.…”