Microcapsules

Concrete sewage pipes lead a hard life, constantly being exposed to corrosive acid produced by bacteria in wastewater. A new additive could allow such concrete to self-heal – and it would do so using water treatment sludge.

Although there are glues that work underwater, they typically require at least 24 hours to set – which can be tricky in chaotic marine environments. A new additive, however, reportedly allows underwater resin adhesives to set in just 60 seconds.

Rather than always replacing parts, fixing things or just throwing them away, self-healing materials can patch themselves up as required. Now, researchers at are working on extending the life of membranes in hydrogen fuel cells by equipping them with similar self-healing powers.

Scientists are creating self-healing electronics, that use liquid metal to instantly restore conductivity to cracked circuits.

New technology will cause bike helmets to stink when they need to be replaced.