Folding of xylan onto cellulose fibrils in plant cell walls
In December 2016, scientists published research into super-strength ‘glue’ that could enable the wider construction of low-energy timber high-rise buildings.
Published in the journal 'Nature Communications', the scientists at Cambridge and Warwick universities used nanoscale imaging to investigate the secret behind the strength of plant cell walls. In particular, the father-and-son team studied how key sugars in cells bind to form strong, indigestible materials.
The molecules of cellulose and xylan, which are 10,000 times narrower than the width of a human hair, are the two most common large molecules, or ‘polymers’. They are both found in the cell walls of materials such as wood and straw, and play an integral role in determining material strength and ease of break down. Compositionally, the two polymers are quite different – xylan is long and winding, with attachments of sugars and molecules; whereas cellulose is more thick and rod-like.
Professor Paul Depree, Department of Biochemistry, Cambridge University, said:
“We knew the answer must be elegant and simple … And in fact, it was. What we found was that cellulose induces xylan to untwist itself and straighten out, allowing it to attach itself to the cellulose molecule. It then acts as a kind of ‘glue’ that can protect cellulose or bind the molecules together, making very strong structures.”
Understanding how cellulose and xylan fit together could have a dramatic effect on industries as diverse as biofuels, paper production and construction, said Paul Dupree.
“One of the biggest barriers to ‘digesting’ plants – whether that’s for use as biofuels or as animal feed, for example – has been breaking down the tough cellular walls. Take paper production – enormous amounts of energy are required for this process. A better understanding of the relationship between cellulose and xylan could help us vastly reduce the amount of energy required for such processes.”
It is hoped that this latest discovery could help in the formation of stronger materials. There is a resurgence in the use of timber for high-rise developments, and Paul Depree is involved in Cambridge’s Centre for Natural Material Innovation which is researching modified wood as a building material for skyscrapers.
[edit] Find out more
[edit] Related articles on Designing Buildings Wiki
- 11 things you didn’t know about wood.
- Adhesives.
- Cross-laminated timber.
- ETFE.
- Glulam.
- Mastic sealant.
- Sustainable materials.
- Timber.
- Timber construction for London.
[edit] External references
- Folding of xylan onto cellulose fibrils in plant cell walls revealed by solid-state NMR, Thomas J. Simmons, Jenny C. Mortimer, Oigres D. Bernardinelli, Ann-Christin Pöppler, Steven P. Brown, Eduardo R. deAzevedo, Ray Dupree & Paul Dupree. Nature Communications, 21 December 2016.
Featured articles and news
Awe-inspiring medieval great barns.
Registered building inspectors
Building types and conflicts of interest updates explaineed.
Engineering services still struggle with labour shortages
According to latest quarterly services survey of the sector.
Infrastructure that connect the physical and digital domains.
Harnessing robotics and AI in challenging environments
The key to nuclear decommissioning and fusion engineering.
BSRIA announces Lisa Ashworth as new CEO
Tasked with furthering BSRIA’s impressive growth ambitions.
Public buildings get half a million energy efficiency boost
£557 million to switch to cleaner heating and save on energy.
CIOB launches pre-election manifesto
Outlining potential future policies for the next government.
Grenfell Tower Inquiry announcement
Phase 2 hearings come to a close and the final report due in September.
Progress from Parts L, F and O: A whitepaper, one year on.
A replicated study to understand the opinion of practitioners.
ECA announces new president 2024
Electrical engineer and business leader Stuart Smith.
A distinct type of countryside that should be celebrated.
Should Part O be extended to existing buildings?
EAC brands heatwave adaptation a missed opportunity.
Definition of Statutory in workplace and facilities management
Established by IWFM, BESA, CIBSE and BSRIA.
Tackling the transition from traditional heating systems
59% lack the necessary information and confidence to switch.
The general election and the construction industry
As PM, Rishi Sunak announces July 4 date for an election.