Scientists have long sought to replicate the shock-absorbing and lubricating properties of cartilage, with such a material undoubtedly having a range of applications in engineering and beyond. However, the bi-phase nature of cartilage – whereby it exists in both solid and fluid states, depending on the presence of synovial fluid in the joints – has proved difficult to reproduce. Researchers created a synthetic porous material made of a hydrogel held in a matrix of polydimethylsiloxane (PDMS), a silicone-based polymer that enables the hydrogel to maintain its shape under pressure, mimicking cartilage.
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