Acrylonitrile-butadiene-lignin thermoplastic rubber adhesive for enhanced metal-to-metal joining
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
With the growing requirement for lightweight structural materials in automotive, aerospace, and infrastructure applications, multi-material joints made with adhesive have attracted intense research interest. Commercial thermoset adhesives are one-time cures, and difficult to disassemble the bonded components for repair and recycling. Our prior work with a thermoplastic acrylonitrile-butadiene-lignin rubber (ABL) addresses this sustainability/recycling challenge, but the adhesive exhibits deficient joining strength compared to standard thermosets. Here, we modify the ABL matrix by loading particulate fillers to enhance its modulus and toughness. Further, the goal is to manufacture a cure-free thermoplastic adhesive system with a simple dispensing protocol and characteristic ductility combined with a high yield stress for improved shear strength of a bonded joint. Fumed silica (FS) and epoxidized glass spheres (EGS) were used as fillers in the ABL to promote the dispersion of lignin particles that tailored the functionalities and free energy components of the adhesive surface. With optimal loading of FS (5 wt%) and EGS (30 wt%) in the ABL adhesive matrix, the lap-shear strength of the bonded aluminum joint was elevated by 128%, compared to the neat ABL, reaching 21 MPa, which is 90% of the performance of a commercial epoxy-based adhesive.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
- Grant/Contract Number:
- AC05-00OR22725; AC05-76RL01830
- OSTI ID:
- 2376389
- Alternate ID(s):
- OSTI ID: 2319068
OSTI ID: 2407046
- Report Number(s):
- PNNL-SA--195240
- Journal Information:
- Polymer Composites, Journal Name: Polymer Composites Journal Issue: 8 Vol. 45; ISSN 0272-8397
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
A renewable lignin-based thermoplastic adhesive for steel joining
Journal Article
·
Wed Mar 08 19:00:00 EST 2023
· European Polymer Journal
·
OSTI ID:1994622