仿生材料的合成和应用

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References
• Wong, T. S., S. H. Kang, et al..Bioinspired self-repairing slippery surfaces with pressure-stable omniphobicity.Nature 2011(7365): 443447. • Stuart C. Thickett ,et al. Biomimetic Surface Coatings for Atmospheric Water Capture Prepared by Dewetting of Polymer Films. Advanced Materials. 2011(23): 3718-3722. • Ji-Yao Chen, Ya-Ling Liao, Tzu-Hsien Wang, Wen-Chien Lee. Transformation of escherichia coli mediated by magnetic nanoparticles in pulsed magnetic field. Enzyme and Microbial Technology 2006 (39): 366–370. • B.Bhushan. Biomimetics: lessons from nature. Phil. Trans. R. Soc. A2009(367): 1445-1486. • E.Munch, M.E.Launey, et al. Tough, bio-inspired hybrid materials. Science. 2008(322):1516-1520.
sintering “brick-and-mortar” structures lamellar structures without pressing
Structure of Al2O3/PMMA materials
A) Al2O3/PMMA lamellar composites B) brick-and-mortar architectures C) a microscopic roughness in the ceramic walls. D) ceramic bridges
Synthesis methods
Almost all methods related to the production of artificial nacre are based on laminates processing
(a )
(b )
Covalent self-assembly or bottom-up approach Electrophoretic deposition Layer-by-layer methodologies Template inhibition Other methodologies
water Al2O3 powder dispersant
ceramic-based suspensions in water directional freezing drying and Infiltrating the PMMA
pressing the scaffolds to collapse them
distribution •Easily oxidized
The physical methods
The chemical methods
• Co-precipitation method • Sol-gel method • Hydrothermal method
The advantages: •Good quality •Small particle size •The operation is easy •Low cost
Hierarchy of the shell structure
(a) Entire shell (b) mesostructure with mesolayers (c) nanostructure of organic interlayer (d) microstructure with aragonite tiles
Idea source
Lotus and pitcher plants
Steno-cara Bee and pigeon
Seashells
Shellfish biomimetic materials
Seashells, bones, teeth etc.
High mechanical strength
Seashells
Bioinspired superhydrophobicity surfaces
Learn from Pitch Plant
Wong, T. S., S. H. Kang, et al..Bioinspired self-repairing slippery surfaces with pressure-stable omniphobicity.Nature 2011(7365): 443-447.
Mechanical properties characterization
Hale Waihona Puke Baidu
A) bending stress-strain curves;
B) toughness for crack growth.
E.Munch, M.E.Launey, et al. Tough, bio-inspired hybrid materials. Science. 2008(322):1516-1520.
Influence factors
Concentration
The ratio of Fe2+and Fe3+
The temperature
The value of PH
The washing mode
Ji-Yao Chen, Ya-Ling Liao, Tzu-Hsien Wang, Wen-Chien Lee. Transformation ofEscherichia coli mediated by magnetic nanoparticles in pulsed magnetic field.Enzyme and Microbial Technology 39 (2006) 366 –370.
Potential Application
F1 fluid transportation
F2 self-cleaning window
Idea source
Lotus and pitcher plants
Steno-cara Bee and pigeon
Seashells
Biomimetic surface films for capturing atmospheric water
Steno-cara Bee and pigeon
Seashells
Magnetic nanoparticles
Magnetic bacteria Pigeon Bee Dolphin
Chiton
brain
Preparation of magnetic nanoparticles
• Vacuum condensation method The disadvantages: •Low purity • Physical crushing method •Non-uniform particle • Mechanical milling method
Double helix laminated structure
Reinforcing fibre，Resin matrix
Layered ceramic structure
Base materials：Al2O3，ZrO2，SiC，Si3N4 Interlayer materials：Ni，Al， graphite ，Al2O3，ZrO2，PMMA
B.Bhushan. Biomimetics: lessons from nature. Phil. Trans. R. Soc. A(2009)367,1445-1486.
The notion of mimicking natural structures
Nano structure
Nano-porous structure
Namib Desert
Steno-cara
How to get water for the beetles in one of the world’s driest desert?
Snythesis of dewetting polymer films
Hydrophobic layer： PS, 91.3° Hydrophilic layer： P4VP, 36°
Synthesis of biomimetic materials ————Mysterious Nature!
Members： 刘书萍 王慧娟 吴玫颖 李虹庆 刘 晶 牟 娟 郭 静
Idea source
Lotus and pitcher plants
Steno-cara Bee and pigeon
Annealing temperature： above 160℃
Stuart C. Thickett ,et al. Biomimetic Surface Coatings for Atmospheric Water Capture Prepared by Dewetting of Polymer Films. Advanced Materials. 2011(23): 3718-3722.
Preparation of Fe3O4 magnetic nanoparticles by Co-precipitation method
Fe2++Fe3++OH-→Fe(OH)2/ Fe(OH)3 (co-precipitation) Fe(OH)2 +Fe(OH)3 →FeOOH+Fe304(pH≤7.5) FeOOH+Fe2+→Fe3O4 +H+(pH≥9.2)
Latest News
The James Dyson Award 2011 winner Edward Linacre and his Airdrop
http://xmwb.news365.com.cn/xz/201111/t20111125_3189754.htm
Idea source
Lotus and pitcher plants
(c ) (d ) (e )
Special attention will be given to aqueous solution-based techniques at ambient or near-ambient temperature and pressure.
Freeze-casting processing