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Biomimetic bricks inspired by mother of pearl
Chemistry World ^ | 8 April 2013 | Charlie Quigg

Posted on 04/08/2013 5:19:27 PM PDT by neverdem

© Shutterstock

Chinese chemists have developed a new nacre-like material which is stronger than natural nacre and most other composites.

Nacre, which is also known as mother of pearl, is a naturally occurring composite formed from calcium carbonate and biopolymers that create a brickwork structure. It is also nearly a thousand times stronger than any of its component parts and a major target for biomimetic synthesis.

Design of the brickwork structure is central to developing nacre-like materials with enhanced properties. Gaoquan Shi, and colleagues, at Tsinghua University, Beijing, began by making a hydrogel from graphene and a silk protein, called fibroin.

Solution casting and drying this hydrogel gave parallel graphene plates bound with fibroin that self-assembled to create a material with a brickwork structure.

The team’s material is an improvement over other composites owing to a number of different factors. Graphene is stronger than the inorganic platelets that are commonly used but Shi explained that the homogenous composite hydrogel ‘produced an ideal layered structure’ which amplified the mechanical properties. Coupled with the strong electrostatic and hydrogen bonding between fibroin and graphene, the system surpasses most composites previously reported.

Nonappa, an expert in nacre from Aalto University, Finland, highlighted the importance of the technique, commenting that ‘simple and robust solvent casting to obtain materials with extraordinary mechanical properties makes the present work unique.’ Hao Bai, a specialist in materials engineering from Lakehead University, Canada, agrees, telling Chemistry World that ‘this step forward could have an impact on the design and fabrication of nacre-inspired materials as well as the application of graphene.’

The team is particularly interested in exploiting the superior mechanical properties and biocompatibility of the component parts to develop the technology for use in tissue engineering and scaffolds.

References

L Huang et al, Nanoscale, 2013, DOI: 10.1039/c3nr00196b


TOPICS: Culture/Society; News/Current Events; Technical
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1 posted on 04/08/2013 5:19:27 PM PDT by neverdem
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To: neverdem
develop the technology for use in tissue engineering and scaffolds

move over viagra

2 posted on 04/08/2013 5:23:10 PM PDT by bigheadfred
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To: bigheadfred

LOL


3 posted on 04/08/2013 5:52:10 PM PDT by Gator113 ( ~just keep livin~ I drink good wine, listen to good music and dream good dreams.)
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To: bigheadfred
Erection in Progress photo Erection.png
4 posted on 04/08/2013 6:00:18 PM PDT by null and void (Gun confiscation enables tyranny. Republicans create the tools of oppression and Democrats use them.)
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To: null and void

all i know is put the dog out if you plan on using those new bacon flavored condoms


5 posted on 04/08/2013 6:02:28 PM PDT by bigheadfred
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To: neverdem

Would make a nice composite material for stealth fighters if it could take the heat. And, it would be pretty!


6 posted on 04/08/2013 6:06:43 PM PDT by American in Israel (A wise man's heart directs him to the right, but the foolish mans heart directs him toward the left.)
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To: null and void

This subject is one that is most interesting. The concept of scaffolds and tissue generation means there could be a chance , despite the offer, you wouldn’t have to make an organ donation. Just a mere monetary donation to the outfit supplying the scaffold.


7 posted on 04/11/2013 8:38:48 PM PDT by bigheadfred
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