Mention the word ‘spinning’ to most people, and they might be transported back to their childhood and fairy tales of princesses in towers. They might think about industrial Britain in the 19th century, and the revolution in textile manufacture. Or they might be reminded of the gym session that they look forward to and dread in equal measure every week.
But for chemical engineers, spinning – of fibres into membranes for separation – can be a doorway to a sustainable future.
Membranes offer several advantages in separation over alternatives such as distillation, sublimation or crystallisation. They permit the use both fractions (the permeate and the retentate) after separation and because no heating is involved, less energy is used.