AI Article Synopsis
- The article discusses expanded vermiculite-enhanced polyurethane foam composites inspired by pomelo peel, focusing on their unique columnar lattice structure which improves their physical properties.
- The study investigates how varying the content of expanded vermiculite (EV) affects the thermal, compression, and cushioning capabilities of these bionic composites.
- Results indicate that an optimal performance occurs with 1 wt% EV, leading to superior energy absorption and impact resistance, but further additions of EV negatively alter the cell shape and adhesive properties, reducing effectiveness.
Article Abstract
In this article, expanded vermiculite (EV)-enhanced polyurethane foam bionic composites inspired by pomelo peel is proposed. The columnar lattice structure mold is employed to constitute the periodic interface structure and gradient foam structure, and the nylon nonwoven fabric is combined as the surface layer. The effects of EV content on the thermal, compression, and dynamic cushion properties of bionic composites are investigated. Results show that residual char increases with EV content, which conduces to decrease the release of heat flow. The proposed bionic composite with columnar lattice structure has optimal compressive modulus, energy absorption and dynamic cushion efficacy when 1 wt% EV is added. However, its performance decreases slowly when EV fillers are continuously added because the cell morphology is changed from round to irregular shape and the interfacial adhesion of filler-matrix is weakened. Owing to their unique bionic structure, composites can absorb 99% of the energy impacted by flat impactor within a smaller deformation and achieve 97% absorption efficiency for a hemispheric impactor in cushion test.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6631770 | PMC |
| http://dx.doi.org/10.3390/polym11061028 | DOI Listing |
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