The entrepreneur likened the push for graphene planes to his previous encouragement of Airbus and Boeing to make planes from carbon fibre, a battle he eventually won. Boeing's latest 787 Dreamliner planes, which Virgin is flying on the London Heathrow-Seattle route, are made from 50 per cent carbon fibre and other composite materials, as opposed to the traditional 100 per cent aluminium. As a result, they use 30 per cent less fuel than a standard alternative.
Sir Richard said the airline was still committed to reducing its carbon footprint through using cleaner fuels.
Virgin Atlantic is working with US-based clean fuels specialist Lanzatech on a biological process to convert carbon waste from manufacturing processes into ethanol, which in turn can be converted into jet fuel.
Although the product has yet to be scaled, Virgin bosses are hopeful it could revolutionise the way the fleet consumes fuel.
"If you take all the steel plants and all the aluminium plants around the world and take all the s*** that goes up the chimneys, and then you turn that into jet aviation fuel, something like 30-40pc could be powered that way," he went on.
"The question is: are they going to be able to scale it up enough to really make a difference?"
His comments come a day after Virgin Atlantic chief executive Craig Kreeger admitted the airline was forecast to make a loss this year due to higher fuel costs, and lower revenues because of sterling's weakness.
The airline made a £23 million ($40.8m) profit in 2016, up £500,000 ($889,000) on 2015.
Sir Richard owns a 51 per cent stake in Virgin Atlantic through his Virgin Group.