1、Advanced Materials Prepared by Freeze-drying technique,University of Science and Technology of China,Contents,What is the lightest material in the world?,Haiyan S，Zhen X，Chao G. Advanced Materials. 2013, 25:2554-2560.,Multifunctional, Ultra-Flyweight, Synergistically Assembled Carbon Aerogels,CNTs a
2、queous dispersion 1.0mg/ml，28ml,GGO aqueous dispersion 1.0mg/ml，28ml,Mixing,Stiring for 1.5 h,Haiyan S，Zhen X，Chao G. Advanced Materials. 2013, 25:2554-2560.,mixture,mold,freeze-drying for 2d,chemically reduced by N2H4vapor at 90 for 24 h,vacuum-drying at 160 for 24 h,Haiyan S，Zhen X，Chao G. Advance
3、d Materials. 2013, 25:2554-2560.,Haiyan S，Zhen X，Chao G. Advanced Materials. 2013, 25:2554-2560.,(d),(c),(e),(f),Haiyan S，Zhen X，Chao G. Advanced Materials. 2013, 25:2554-2560.,冷冻干燥（Freeze-drying）又称真空冷冻干燥、冻结干燥、冻干（FD）。 1811年 诞生，用于生物体脱水 1890年 医学上的首次应用，冻干了一批生物器官 1932年 引入真空设备，在生物制品、药剂以及食品领域迅猛发展 1935年 干燥
4、的过程采用主动加热，开始应用到工业生产 1965年 首先采用冻干技术制备出金属超细粉末如今 在超导材料、超细金属粉末、精细陶瓷、催化剂、高能电池以及薄膜材料等领域都得到了广泛的应用。,孙启达,冷冻干燥超细粉体技术及应用M.化学工业出版社,2006.,History of Freeze-drying,Phase diagram of salt-water system,Highly elastic graphene oxideepoxy composite aerogels via simple freeze-drying and subsequent routine curing,Shibin
5、g Ye et al, J. Mater. Chem. A, 2013, 1, 34953502,SEM images of (a and b) GOA and (c and d) GEA-9,Multifunctional Graphene/Platinum/Nafion（全氟磺酸） Hybrids,Luis Estevez et al. J. Am. Chem. Soc. 2011, 133: 61226125,Multifunctional Graphene/Platinum/Nafion Hybrids via Ice Templating,Justin E.Silpe, et al.
6、 Langmulr , 2013 , 29: 8782-8787.,Freeze-drying,Antibubbles fabricated by Freeze-drying method,Freeze-drying synthesis of Li3V2 (PO4 )3 /C cathode material,The as-prepared material shows a uniform particle size distribution and the particle size is much smaller than 300 nm. the composite delivered a
7、 reversible capacity of 125.2 mAhg-1 without obviously fading after 100 cycles.,Qiao Y Q, Wang X L, Mai Y J, et al. Journal of Alloys and Compounds, 2012, 536: 132-137.,徐如人, 庞文琴, 霍启升.无机合成与制备化学M.高等教育出版社,2009.,Prepare ultra-fine powder,Adavantages： Can be obtained in a homogeneous mixture of the compo
8、nents in solution, suitable for adding trace components, synthesize complex functional ceramic materials nanoparticles. Size of nanoparticles range from 1 nm to 50 nm . Easy to operate and good in the preparation of high purity ceramic material. Disadvantages：Efficiency is relatively low, corrosive
9、gas impact the life of the equipment.,The principle of Freeze-drying technique Synthesis of Advanced Materials by Freeze- drying technique has many Advantages:template-freesimpleretain the original structurescalable fabricationEnlightenment: new wine in an old bottle; new concepts in an old framewor
10、k,孙启达,冷冻干燥超细粉体技术及应用M.化学工业出版社,2006 徐如人, 庞文琴, 霍启升.无机合成与制备化学M.高等教育出版社,2009. Han Y, Xu Z, Gao C. Ultrathin graphene nanofiltration membrane for water purificationJ. Advanced Functional Materials, 2013. Estevez L, Kelarakis A, Gong Q, et al. Multifunctional graphene/platinum/nafion hybrids via ice templa
11、tingJ. Journal of the American Chemical Society, 2011, 133(16): 6122-6125. Mecklenburg M, Schuchardt A, Mishra Y K, et al. Aerographite: Ultra Lightweight, Flexible Nanowall, Carbon Microtube Material with Outstanding Mechanical PerformanceJ. Advanced Materials, 2012, 24(26): 3486-3490. Schaedler T A, Jacobsen A J, Torrents A, et al. Ultralight metallic microlatticesJ. Science, 2011, 334(6058): 962-965.,Thank you for your attention!,
