Abstract
Candelilla wax (CW) was added in 5, 6 and 7% w/w to canola oil (CO), heating the mixtures to 90 oC, and cooling down to room temperature, in order to obtain CW/CO oleogels. The nonlinear viscoelastic characteristics of the oleogels was conducted by means of large amplitude oscillatory shear (LAOS) methods. To this end, Fourier analysis of the stress-time response was carried out to extract information on high-harmonic oscillatory moduli. The results showed that nonlinearities were expressed for moderate strain deformations, of the order of 1-15%. In particular, nonlinearities quantified in terms of the harmonic contributions were stronger for the elastic response (about 85-125%) than for the viscous response (less than 40%). In contrast, the mechanical response was essentially harmonic for small amplitude values, indicating the absence of nonlinearities and hence the dominance of linear viscoelastic response. Interestingly, the viscoelastic response was also linear for large strain deformation (>100%). The results reported in the present study demonstrated the viability of LAOS method for obtaining invaluable insights regarding the nonlinear mechanical response of edible oleogels made with natural waxes.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.