Mechanical behaviour of alginate film with embedded voids under compression-decompression cycles

Banerjee, Arindam; Ganguly, Suvankar

doi:10.1038/s41598-019-49589-w

Cited by 7 publications

(3 citation statements)

References 45 publications

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“…The squeezing action during pressing in the duct during spinning could be responsible for some of the variation in void sizes within the different species silks. 37,50 Confirming or refuting this will require further investigations to be made. Nevertheless, such actions are unlikely to explain any of the within thread variations in void formation we observed.…”

Section: Resultsmentioning

confidence: 99%

Nanovoid formation induces property variation within and across individual silkworm silk threads

et al. 2022

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Section: Resultsmentioning

confidence: 99%

Nanovoid formation induces property variation within and across individual silkworm silk threads

et al. 2022

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“…The constant D i j indicates the expansion, contraction, and shear deformation of the RVE due to the a see references. 55,56 .…”

Section: Representative Volume Element Generationmentioning

confidence: 99%

Experimental and numerical investigation on the effect of core-shell microcapsule sizes on mechanical properties of microcapsule-based polymers

Teimouri

Barbaz‐Isfahani

Saber‐Samandari

et al. 2022

Journal of Composite Materials

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In this study, the effect of various microcapsule sizes on the mechanical properties of microcapsule-based polymeric materials was investigated using the finite element method and validated with experimental outcomes. Specimens containing 5wt. % of microcapsules were fabricated to calculate the elastic modulus, and maximum tensile stress, and to validate numerical results. To consider the error, five tests were performed for all samples, and results were reported on average. The average errors between the numerical outcomes and experimental results were 4.74% and 5.35% for maximum tensile stress and elastic modulus, respectively. The coaxial electrospraying method was used for synthesizing microcapsules made of alginate (shell) and epoxy (core). A scanning electron microscope (SEM) was used to calculate the diameter of the capsules. To develop an empirical model for the average microcapsule diameter (AMD) and carry out the optimization process, response surface methodology (RSM) with central composite design was used. Also, analysis of variance was employed to validate the accuracy of the model. The effects of three parameters, including voltage, needle size, and the distance between the tip of the needle to the collector, on average microcapsule diameter, were investigated. The empirical model was validated by a confirmation run, and the determined error (1.93%) between the predicted and experimental results indicates the precision of the model. The numerical study indicated that microcapsule-based self-healing polymers containing smaller microcapsules tolerate higher stresses. However, the effect of the microcapsules’ size on the elastic modulus of a representative volume element was negligible.

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“…where E is the Young's modulus of the sample and ν is the Poisson's ratio of the sample (ν = 0.4 for alginate gels 12 ). The fit of the indentation-force curve with a Hertz law provides an estimation of the Young's modulus of alginate gels.…”

Section: Measurements Of the Elastic Properties Using Indentation Tes...mentioning

confidence: 99%

Shaping gels and gels mixture to create helices

et al. 2022

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In cooking, food gels such as agar-agar or alginate are often prepared and presented in the form of spheres or spaghetti. While experimenting in our kitchen, we realized that it is quite difficult to make more advanced shapes. In this study, we sought to develop new methods to obtain more complex shapes. Our first challenge was to obtain helices. The best method we selected was to deposit the solutions before their gelation in a thread. The robustness of the method is tested by systematically changing the thread pitch, diameter and depth. From the deformation under its own weight, we propose to deduce the mechanical characteristics of the helix. These values are compared to those obtained in the laboratory using indentation testing. Finally, we experimented with mixed gels obtained by combining agar-agar and alginate.

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Mechanical behaviour of alginate film with embedded voids under compression-decompression cycles

Cited by 7 publications

References 45 publications

Nanovoid formation induces property variation within and across individual silkworm silk threads

Nanovoid formation induces property variation within and across individual silkworm silk threads

Experimental and numerical investigation on the effect of core-shell microcapsule sizes on mechanical properties of microcapsule-based polymers

Shaping gels and gels mixture to create helices

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