Synthesis and properties of polyurethane wood adhesives derived from crude glycerol-based polyols
Source abstract
Abstract
Abstract Crude glycerol, a waste stream of the biodiesel production process, is low-cost renewable feedstock for the production of chemicals and polymers. In this study, polyurethane (PU) adhesives were synthesized from crude glycerol-based polyols (CG-based polyols) for wood bonding applications. Effects of different variables, including hydroxyl values of CG-based polyols, chain extenders, and the molar ratio of NCO/OH on the properties of PU adhesives were investigated. The chemical structures of PU adhesives were characterized, and their thermal, mechanical, and chemical resistance properties were evaluated. The experimental results indicated that an increase of the NCO/OH molar ratio (1.3) substantially improved bonding strength by up to 38 MPa. Higher thermal stability and stronger chemical resistance to hot and cold water and to alkali and acid solutions were observed comparing to vegetable oil-based adhesives. However, the effect of the hydroxyl value of polyols on bonding strength was not significant. Additionally, bond strength of crude glycerol-based PU adhesives was comparable to that of some commercial PU wood adhesives. All these properties demonstrated the potential of CG for PU wood adhesive applications, particularly for fast-curing uses.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Polymer composites and self-healing · Lignin and Wood Chemistry · biodegradable polymer synthesis and properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (36)
Show source-provided references
1. Abraham, TW, Carter, JA, Malsam, J, Zlatanic, AB. Oligomeric polyols from palm-based oils and polyurethane compositions made therefrom. Pittsburg State University. WO2007123637; 2007.
2. Polyurethane wood adhesive from palm oil-based polyester polyol10.1080/01694243.2014.883772 ↗
3. Polyol production by chemical modification of date seeds10.1016/j.indcrop.2011.03.012 ↗
4. PUR adhesives offer solutions for assembly challenges
5. Novel thermoplastic materials based on the outer-shell oxypropylation of corn starch granules10.1021/bm070389j ↗
6. Biomaterial based polyurethane adhesive for bonding rubber and wood joints10.1023/B:JPOL.0000004630.77120.bb ↗
7. Polyurethane adhesive system from biomaterial-based polyol for bonding wood10.1016/S0143-7496(03)00070-8 ↗
8. Analysis of the thermal decomposition of commercial vegetable oils in air by simultaneous TG/DTA10.1023/B:JTAN.0000027124.96546.0f ↗
9. Production of polyols and waterborne polyurethane dispersions from biodiesel-derived crude glycerol10.1002/app.41425 ↗
10. Polyols and polyurethane foams from acid-catalyzed biomass liquefaction by crude glycerol: effects of crude glycerol impurities10.1002/app.40739 ↗
11. Thermal stability of polyurethane based vegetables oils10.1002/1097-4628(20000822)77:8<1723::AID-APP9>3.0.CO;2-K ↗
12. Rubber solution adhesives for wood to wood bonding10.1002/(SICI)1097-4628(19980516)68:7<1185::AID-APP15>3.0.CO;2-X ↗
13. Castor oil based polyurethane adhesives for wood-to-wood bonding10.1016/S0143-7496(03)00044-7 ↗
14. Characterization of canola oil based polyurethane wood adhesives10.1016/j.ijadhadh.2011.05.004 ↗
15. Synthesis of palm oil-based diethanolamides10.1007/s11746-007-1123-8 ↗
16. Pressure-sensitive adhesives based on epoxidized soybean oil and dicarboxylic acids10.1021/sc5003853 ↗
17. Value-added processing of crude glycerol into chemicals and polymers10.1016/j.biortech.2016.03.042 ↗
18. Thermochemical conversion of crude glycerol to biopolyols for the production of polyurethane foams10.1016/j.biortech.2013.04.011 ↗
19. Synthesis and characterization of polyols and polyurethane foams from PET waste and crude glycerol10.1007/s10924-014-0649-8 ↗
20. Synthesis and adhesive properties of some polyurethane dispersion10.1016/0143-7496(92)90006-H ↗
21. Preparation of polyurethane wood adhesives by polyols formulated with polyester polyols based on castor oil10.1016/j.ijadhadh.2016.04.004 ↗
22. Synthesis and thermal properties of soybean oil-based waterborne polyurethane coatings10.1007/s10973-009-0418-4 ↗
23. From glycerol to value- added products10.1002/anie.200604694 ↗
24. Synthetic adhesives for wood panels: chemistry and technology
25. Failure mechanisms in wood joints bonded with urea-formaldehyde adhesives10.1007/BF02615219 ↗
26. Roh, Y, Kumar, R, Zhao, CL, Kaczan, D, Smiecinski, TM. BASF, polyol formed from an epoxidized oil. WO2009138411; 2008.
27. The chain extender content and NCO/OH ratio flexibly tune the properties of natural rubber-based waterborne polyurethanes10.1002/app.42505 ↗
28. Shah, AM, Shah, TM. Process for production polyols and polyols for polyurethane. US6258869; 2001.
29. Alkaline degradation of wood: effects on Young's Modulus10.1007/BF00386404 ↗
30. Glycerol production and its applications as a raw material: a review10.1016/j.rser.2013.06.035 ↗
31. Perspective: ionomer research and applications10.1002/mren.201300181 ↗
32. Trapping dynamic disulfide bonds in the hard segment of thermoplastic polyurethane elastomers10.1002/macp.201600320 ↗
33. Behavior of amine-modified urea-formaldehyde-bonded wood joints at low formaldehyde/urea molar ratios10.1002/app.1994.070520510 ↗
34. Effect of acidic solutions on the surface degradation of a micro-hybrid composites resin10.1590/0103-6440201300058 ↗
35. Oxypropylation of lignins and preparation of rigid polyurethane foams from the ensuing polyols10.1002/mame.200500200 ↗
36. Evaluation of properties of starch-based adhesives and particleboard manufactured from them10.1080/01694243.2014.987362 ↗