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Sustainably sourced components to generate high-strength adhesives –

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Nature volume 621pages 306–311 (2023)
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Nearly all adhesives1,2 are derived from petroleum, create permanent bonds3, frustrate materials separation for recycling4,5 and prevent degradation in landfills. When trying to shift from petroleum feedstocks to a sustainable materials ecosystem, available options suffer from low performance, high cost or lack of availability at the required scales. Here we present a sustainably sourced adhesive system, made from epoxidized soy oil, malic acid and tannic acid, with performance comparable to that of current industrial products. Joints can be cured under conditions ranging from use of a hair dryer for 5 min to an oven at 180 °C for 24 h. Adhesion between metal substrates up to around 18 MPa is achieved, and, in the best cases, performance exceeds that of a classic epoxy, the strongest modern adhesive. All components are biomass derived, low cost and already available in large quantities. Manufacturing at scale can be a simple matter of mixing and heating, suggesting that this new adhesive may contribute towards the sustainable bonding of materials.
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Data generated during the current study are available from the corresponding author on request.
Petrie, E. M. Handbook of Adhesives and Sealants 2nd edn (McGraw-Hill, 2007).
Pocius, A. V. Adhesion and Adhesives Technology: An Introduction (Carl Hanser Verlag, 2012).
Ebnesajjad, S. Handbook of Biopolymers and Biodegradable Plastics: Properties, Processing and Applications (Elsevier/William Andrew, 2013).
Gupta, A., Simmons, W., Schueneman, G. T., Hylton, D. & Mintz, E. A. Rheological and thermo-mechanical properties of poly(lactic acid)/lignin-coated cellulose nanocrystal composites. ACS Sustain. Chem. Eng. 5, 1711–1720 (2017).
Article  CAS  Google Scholar 
Thakur, V. K., Thakur, M. K., Raghavan, P. & Kessler, M. R. Progress in green polymer composites from lignin for multifunctional applications: a review. ACS Sustain. Chem. Eng. 2, 1072–1092 (2014).
Article  CAS  Google Scholar 
Hopewell, J., Dvorak, R. & Kosior, E. Plastics recycling: challenges and opportunities. Philos. Trans. R. Soc. B 364, 2115–2126 (2009).
Article  CAS  Google Scholar 
Yang, H. R., Chen, G. L. & Wang, J. Microplastics in the marine environment: sources, fates, impacts and microbial degradation. Toxics 9, 41 (2021).
Article  CAS  PubMed  PubMed Central  Google Scholar 
Brown, S. K., Sim, M. R., Abramson, M. J. & Gray, C. N. Concentrations of volatile organic-compounds in indoor air – a review. Indoor Air Qual. Clim. 4, 123–134 (1994).
Article  CAS  Google Scholar 
Kim, J. S., Eom, Y. G., Kim, S. & Kim, H. J. Effects of natural-resource-based scavengers on the adhesion properties and formaldehyde emission of engineered flooring. J. Adhes. Sci. Technol. 21, 211–225 (2007).
Article  CAS  Google Scholar 
Heinrich, L. A. Future opportunities for bio-based adhesives – advantages beyond renewability. Green Chem. 21, 1866–1888 (2019).
Article  CAS  Google Scholar 
Bernassau, A. L., Hutson, D., Demore, C. E. M. & Cochran, S. Characterization of an epoxy filler for piezocomposites compatible with microfabrication processes. IEEE Trans. Ultrason. Ferroelectr. Freq. Control 58, 2743–2748 (2011).
Article  PubMed  Google Scholar 
Ehlers, J. E. et al. Theoretical study on mechanisms of the epoxy – amine curing reaction. Macromolecules 40, 4370–4377 (2007).
Article  ADS  CAS  Google Scholar 
Fan, H. B. & Yuen, M. M. F. Material properties of the cross-linked epoxy resin compound predicted by molecular dynamics simulation. Polymer 48, 2174–2178 (2007).
Article  CAS  Google Scholar 
Tang, C. C., Li, Y., Kurnaz, L. B. & Li, J. Development of eco-friendly antifungal coatings by curing natural seed oils on wood. Prog. Org. Coat. 161, 106512 (2021).
Article  CAS  Google Scholar 
Yang, X. X. et al. Recyclable non-isocyanate polyurethanes containing a dynamic covalent network derived from epoxy soybean oil and CO2. Mater. Chem. Front. 5, 6160–6170 (2021).
Article  CAS  Google Scholar 
Ratna, D. Mechanical properties and morphology of epoxidized soyabean-oil-modified epoxy resin. Polymer Int. 50, 179–184 (2001).
Article  CAS  Google Scholar 
Saithai, P., Lecomte, J., Dubreucq, E. & Tanrattanakul, V. Effects of different epoxidation methods of soybean oil on the characteristics of acrylated epoxidized soybean oil-co-poly(methyl methacrylate) copolymer. Express Polym. Lett. 7, 910–924 (2013).
Article  CAS  Google Scholar 
Sagert, J., Sun, C. & Waite, J. H. in Biological Adhesives (eds Smith, A. M. & Callow, J. A.) 125–143 (Springer-Verlag, 2006).
Hagenau, A., Suhre, M. H. & Scheibel, T. R. Nature as a blueprint for polymer material concepts: protein fiber-reinforced composites as holdfasts of mussels. Prog. Polymer Sci. 39, 1564–1583 (2014).
Article  CAS  Google Scholar 
Lee, B. P., Messersmith, P. B., Israelachvili, J. N. & Waite, J. H. Mussel-inspired adhesives and coatings. Annu. Rev. Mater. Res. 41, 99–132 (2011).
Article  ADS  CAS  PubMed  PubMed Central  Google Scholar 
Hofman, A. H., van Hees, I. A., Yang, J. & Kamperman, M. Bioinspired underwater adhesives by using the supramolecular toolbox. Adv. Mater. 30, 1704640 (2018).
Article  Google Scholar 
Mazzotta, M. G., Putnam, A. A., North, M. A. & Wilker, J. J. Weak bonds in a biomimetic adhesive enhance toughness and performance. J. Am. Chem. Soc. 142, 4762–4768 (2020).
Article  CAS  PubMed  Google Scholar 
Sedó, J., Saiz-Poseu, J., Busqué, F. & Ruiz-Molina, D. Catechol-based biomimetic functional materials. Adv. Mater. 25, 653–701 (2013).
Article  PubMed  Google Scholar 
Guzman, D., Ramis, X., Fernandez-Francos, X. & Serra, A. Preparation of click thiol-ene/thiol-epoxy thermosets by controlled photo/thermal dual curing sequence. RSC Adv. 5, 101623–101633 (2015).
Article  ADS  CAS  Google Scholar 
Saeedi, I. A., Andritsch, T. & Vaughan, A. S. On the dielectric behavior of amine and anhydride cured epoxy resins modified using multi-terminal epoxy functional network modifier. Polymers 11, 1271 (2019).
Article  CAS  PubMed  PubMed Central  Google Scholar 
Baldwin, R. Plywood and Veneer-Based Products, Manufacturing Practices (Miller Freeman Books, 1995).
Bowyer, J., Smulsky, R. & Haygreen, J. Forest Products and Wood Science 5th edn (Blackwell Publishing, 2007).
Jang, J. B. et al. Modified epoxy resin synthesis from phosphorus-containing polyol and physical changes studies in the synthesized products. Polymers 11, 2116 (2019).
Article  CAS  PubMed  PubMed Central  Google Scholar 
Zhang, J., Tang, J. J. & Zhang, J. X. Polyols prepared from ring-opening epoxidized soybean oil by a castor oil-based fatty diol. Int. J. Polym. Sci. (2015).
Article  Google Scholar 
Adamson, M. J. Thermal-expansion and swelling of cured epoxy-resin used in graphite-epoxy composite-materials. J. Mater. Sci. 15, 1736–1745 (1980).
Article  ADS  CAS  Google Scholar 
Loh, W. K., Crocombe, A. D., Wahab, M. M. A. & Ashcroft, I. A. Modelling anomalous moisture uptake, swelling and thermal characteristics of a rubber toughened epoxy adhesive. Int. J. Adhes. Adhes. 25, 1–12 (2005).
Article  CAS  Google Scholar 
Meschut, G., Hahn, O. & Teutenberg, D. Influence of the curing process on joint strength of a toughened heat-curing adhesive. Weld World 59, 209–216 (2015).
Article  CAS  Google Scholar 
Epoxy adhesives market size, share & trends analysis report by application (automotive & transportation, building & construction), by technology, by region, and segment forecasts, 2021-2028. Market (2020).
ChemAnalyst chemical prices quarter 1 (ChemAnalyst, 2022);
Severinghaus, M. & Hamilton, S. Life Cycle Assessment of Liquid Epoxy Resin (Entropy Resins, 2020);
Ramirez-Herrera, C. A., Cruz-Cruz, I., Jimenez-Cedeno, I. H., Martinez-Romero, O. & Elias-Zuniga, A. Influence of the epoxy resin process parameters on the mechanical properties of produced bidirectional [+/− 45 degrees] carbon/epoxy woven composites. Polymers 13, 1273 (2021).
Article  CAS  PubMed  PubMed Central  Google Scholar 
United States Energy Information Administration. How much carbon dioxide is produced per kilowatthour of U.S. electricity generation (United States Government, 2021);
United States Soybean Export Council. Conversion table of soy market (USSEC, 2022);
Canadian Government. Supplemental carbon dioxide in greenhouses (Government of Canada, 2002);
Turco, R. et al. Serio, selective epoxidation of soybean oil with performic acid catalyzed by acidic ionic exchange resins. Green Process Synth. 2, 427–434 (2013).
CAS  Google Scholar 
CarbonCloud. Soybean oil (CarbonCloud, 2023);
Global LCA Data Access. Formic acid production, methyl formate route (GLAD, Univ. of Michigan, 2019);
Global LCA Data Access. Hydrogen peroxide production, product in 50% solution state (GLAD, Univ. of Michigan, 2019);
CarbonCloud. Malic acid (CarbonCloud, Univ. of Michigan, 2022);
Ding, T. R. et al. Life cycle assessment of tannin extraction from spruce bark. IForest 10, 807–814 (2017).
Article  Google Scholar 
CarbonCloud. Ethanol (CarbonCloud, Univ. of Michigan, 2023);
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We thank P. Zavattieri and F. B. Rodriguez from the Lyles School of Civil Engineering at Purdue University for use of their MTS Insight instrument for adhesion testing. Help with microscopy by M. Meger, R. Seiler and C. Gilpin at the Purdue Life Science Microscopy Facility is appreciated. H. Siebert contributed to the initial experiments for this project. This work was supported by Office of Naval Research grant nos. N00014-19-1-2342 and N00014-22-1-2408.
These authors contributed equally: Clayton R. Westerman, Bradley C. McGill
Department of Chemistry, Purdue University, West Lafayette, IN, USA
Clayton R. Westerman, Bradley C. McGill & Jonathan J. Wilker
School of Materials Engineering, Purdue University, Neil Armstrong Hall of Engineering, West Lafayette, IN, USA
Jonathan J. Wilker
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C.R.W. and B.C.M. performed experiments. J.J.W. oversaw the project. The paper was written by all of the authors.
Correspondence to Jonathan J. Wilker.
The authors declare no competing interests.
Nature thanks the anonymous reviewers for their contribution to the peer review of this work. Peer reviewer reports are available.
Publisher’s note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
a, Representation of reactivity in a classic epoxy adhesive. Amine nucleophiles react with the three-membered epoxy rings to form covalent cross-links. The cross-linked product here is a depiction of a more extensive matrix. b, Nucleophiles and phenolics that were reacted with epoxidized soy oil to generate several adhesives formulations. In each case, there was one nucleophile, one phenolic, and epoxidized soy oil. The structures shown for lignin and tannic acid are approximate.
Two wood substrates are bonded together with an adhesive and then placed into the materials testing system. Each substrate has pin holes at the ends. One pin holds the bottom substrate in place. The top pin is attached to the moving crosshead and goes through the upper substrate. As the crosshead moves up and force is applied, a load cell measures force. The recorded force at joint failure is then divided by the substrate overlap area (1.2 x 1.2 cm here) to generate adhesion values in MPa.
a, Adhesion as a function of varied ratios between the components epoxidized soy oil, glycerol, and tannic acid. The substrates were untreated aluminum and curing was at 180 °C for 24 h. b, Adhesion as a function of varied ratios between the components epoxidized soy oil, malic acid, and tannic acid. The substrates were untreated aluminum and curing was at 180 °C for 24 h. c, Adhesion of soy-mal-tan over time when cured at 180 °C and with polished steel substrates. d, Adhesion of soy-mal-tan with changes to substrates and cure conditions. All error bars in panels ac are 90% confidence intervals averaged from n = 5 samples with the exception of n = 10 samples for the 24 hour time point in panel c. The ± values in panel d are 90% confidence intervals from an average of n = 5 samples for the 6 hour, 180 °C cure. All other data are from n = 10 samples.
a, The commercial products Super Glue and an epoxy are shown. b, Curves for soy-mal-tan cured at room temperature for 24 h, 70 °C for 24 h, and 180 °C for 6 h. All substrates here were polished steel.
a, A commercial epoxy shows clean fracture and distinct regions of adhesive versus substrate. b, The soy-mal-tan material shows more complex failure, with stress lines, indicative of ductile behavior. Both substrates were polished steel. The soy-mal-tan adhesive was cured at 180 °C for 6 h.
a, Epoxidized soy oil, malic acid, and tannic acid upon initial mixing at room temperature. b, Soy-mal-tan after 24 h reaction time at 70 °C. Here the adhesive precursor was maintained at 70 °C and viscous, but flowing. c, After the 24 h reaction at 70 °C, cooling to room temperature brought about an increase in viscosity. d, Hardening after a 24 h cure at 180 °C.
a, Initial solution with methyl violet indicator. b, Approximate half-equivalence point reached. c, Equivalence point reached when light green color was present.
a, Infrared spectrum of the final adhesive with all components, epoxidized soy oil, malic acid, and tannic acid. b, Infrared spectrum after a reaction between epoxidized soy oil and malic acid. c, Infrared spectrum of malic acid. Boxes highlight the CO–OH peaks in panels b and c.
Each plot is on the same scale, but offset from each other for comparisons.
a, Resistance of soy-mal-tan to artificial sea water. Bonded pairs of polished aluminum substrates, with 1.2 x 1.2 cm overlap area, were cured in air for 24 h at 70 °C or 6 h at 180 °C and then submerged underwater for varied periods of time at room temperature. The x axis is a log plot in minutes, labelled in hours for clarity. b, Resistance of a commercial epoxy to artificial sea water. Bonded pairs of polished aluminum substrates were cured in air according to the manufacturer’s instructions and then submerged underwater for varied periods of time at room temperature. The x axis is a log plot in minutes, labelled in hours for clarity. c, Testing resistance of soy-mal-tan adhesion to boiling water. These substrates were polished aluminum. In the plots error bars are 90% confidence intervals. For panel a the 180 °C data are from n = 5 samples and the 70 °C data are from n = 10 samples. In panel b the 0 and 1 hour time points are from n = 5 samples with n = 10 samples for the 24 and 168 hour time points.
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Westerman, C.R., McGill, B.C. & Wilker, J.J. Sustainably sourced components to generate high-strength adhesives. Nature 621, 306–311 (2023).
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