Science Fiction Dictionary
A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

 

Smart, Self-Healing Hydrogels

A smart, self-healing hydrogel developed at UC San Diego is made of linked chains of polymer molecules that are similar to the soft tissues of the body. "Dangling side chain" molecules add the capability of self-repair when the body of the hydrogel is cut or damaged.


(Smart, self-healing hydrogels)

"Self-healing is one of the most fundamental properties of living tissues that allows them to sustain repeated damage," says Varghese. "Being bioengineers, one question that repeatedly appeared before us was if one could mimic self-healing in synthetic, tissue-like materials such as hydrogels. The benefits of creating such an aqueous self-healing material would be far-reaching in medicine and engineering."

To design the side chain molecules of the hydrogel that would enable rapid self-healing, Varghese and her collaborators performed computer simulations of the hydrogel network. The simulations revealed that the ability of the hydrogel to self-heal depended critically on the length of the side chain molecules, or fingers, and that hydrogels having an optimal length of side chain molecules exhibited the strongest self-healing. When two cylindrical pieces of gels featuring these optimized fingers were placed together in an acidic solution, they stuck together instantly. Varghese's lab further found that by simply adjusting the solution's pH levels up or down, the pieces weld (low pH) and separate (high pH) very easily. The process was successfully repeated numerous times without any reduction in the weld strength.

Self-healing materials have a long history in science fiction; in his 1951 story Asteroid of Fear, sf great Raymond Z. Gallun, we encounter a unique plastic that can repair itself:

But the wide roof was all the way up, now—intact. It made a great, squarish bubble, the skin of which [a 'transparent, wire-strengthened plastic '] was specially treated to stop the hard and dangerous part of the ultra-violet rays of the sun, and also the lethal portion of the cosmic rays. It even had an inter-skin layer of gum that could seal the punctures that grain-of-sand-sized meteors might make.
(Read more about self-healing plastic)

Via Eurekalert.

Scroll down for more stories in the same category. (Story submitted 5/13/2012)

Follow this kind of news @Technovelgy.

| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |

Would you like to contribute a story tip? It's easy:
Get the URL of the story, and the related sf author, and add it here.

Comment/Join discussion ( 0 )

Related News Stories - (" Material ")

MIT Self-Assembling Reprogrammable Materials
'Faster the cubes moved; faster the circle revolved; the pyramids raised themselves, stood bolt upright on their square bases...' - Abraham Merritt, 1920.

Tiny Mining - Extract Precious Industrial Minerals From Your Own Body
'Jim, I saw them reduce four of my doctors and nurses into those little cubes!' - Gene Roddenberry, 1968.

Polyaramide Is Stronger Than Steel, Light As Plastic
'... harnessed by aludur straps' - Leo Zagat, 1943.

Trinitite, Pentagrams And Isaac Asimov
'...And there were horns.' - Isaac Asimov, 1956.

 

Google
  Web TechNovelgy.com   

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

Science Fiction Timeline
1600-1899
1900-1939
1940's   1950's
1960's   1970's
1980's   1990's
2000's   2010's

Current News

'Courier Commons' By Tomorrow Lab, From Karl Schroeder (and Bruce Sterling?)
'The pokkecon rang again. *The coffee’s for him?* Tsuyoshi said.'

Terrifying Robotic Apple Harvester
'... little machines, that went from plant to plant.'

Jetson-Style Clockwork Robot Nail Salon Coming To Target Near You
The Jetsons imagined so much future.

Mechanical Horse Sculpture Gallops In Place
'Rod placed the brain inside the panel... the horse raised its head, wiggled its ears, blinked twice, gave a tentative whinny.'

'Make Sunsets' Tweaks Climate By Atmospheric Alteration
'Pina2bo would have to operate full blast for many years to put as much SO2 into the stratosphere as its namesake had done in a few minutes.'

Eviation Alice Electric Plane First Flight
'A white electric plane approached at great speed...'

Hotels Turn To Robots As Human Workers Regroup
'Chain of hotels that specialized in non-human service.'

Changesite Mineral To Be Mined On Moon By China
'But then... not every bulldozer operator works on the Moon.'

Tongue-Controlled Tong Wearable Mouth Computer
'Griff found the white and pink map distracting and switched it off using his tongue mouse.'

Is It Better To Be Short?
'He was one of the smaller, energy-saving new breed...'

Taikonaut Tai Chi Foot Loops
'Jimmy Cardigan and Harlowe, staring through the darkside port, had their feet in the foot-loops...'

Space Billboards Would Ruin Our View Of The Cosmos
'But the rising sign, as it had been designed to do, held his eyes. A vast circle of scarlet stars came up into the greenish desert dusk.'

Orion's 'Skip-to-M'Lou' Entry
'A lightning pilot possibly could land that tin toy without power and still walk away from it provided he had the skill to play Skip-to-M’Lou in and out of the atmosphere...'

MarsCat and MetaCat, Your Robot Cat Companions
'It was you who betrayed me — you and your robot cat.'

Mars Mission Using Nuclear Thermal Propulsion
'with its atomic engine as noiseless as a dancing sunbeam...'

Physiotherapists Get Help From Robots
'Most of the Members went into cold-rest; the others tended them...'

More SF in the News Stories

More Beyond Technovelgy science news stories

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.