Synthesis of diamond nanoparticles/urethane-based bio-adhesive and investigation of its morphology and thermal, physicomechanical, and biological properties

Diamond nanoparticles/urethane-based bio-adhesives (ND-U-BA) were synthesized via in-situ polymerization. Chemical structure and curing kinetics of the samples were studied by Fourier-transform infrared spectroscopy. Results showed NDs controlled the curing profile of samples. Thermal and crystalline properties were studied using differential scanning calorimetry and X-ray diffraction analyses. Results indicated hard segments had higher ordering levels in the presence of NDs which is due to the lower hydrogen bonding among polyurethane chains. Mechanical results showed ND-U-BA had higher adhesion strength due to the formation of chemical crosslinks and a controlled curing mechanism. MTT and biodegradation studies showed ND-U-BA had acceptable cell viability and degradation content.• Urethane and diamond nanoparticles/urethane-based bio-adhesives were synthesized.• Results showed ND nanoparticles had controlling effect on curing kinetic of samples.• Cell viability of bio-adhesives was improved with the ND nanoparticles' addition.• Incorporation of ND nanoparticles increased the adhesion strength of bio-adhesive.