层状复合材料的仿生设计与装配

1、Bioinspired Design and Assembly of Layered Composite MaterialsMembers张西伦 SC14003015 于洋 SC14003065赵兴云 SC14003012 江鹏 SA14234093陈思铭 SA14234094 万智阳 SA14168131曹加锋 BJ14014003王康平 SA14003040Index Background of “nacre” Methods and Parameters Materials Synthesis Interfacial Chemistry Future Background of “nac

2、re” Yao. Chem. Soc. Rev., 2011, Cheng, Chem. Soc. Rev., 2012, inorganic minerals(95 wt% brittle)organic biopolymers(5 wt% soft)Excellent compositematerials(high strengthhigh toughness)How ? Yao, . Chem. Soc. Rev., 2011 Wegst. Nat.mater. 2014. NanoasperitiesBiopolymerMineral bridgesYao,Adv. Mater. 20

3、14Background of “nacre” Methods and ParametersYao,Adv. Mater. 2014 Materials SynthesisGODALDHCSMTMPVAInorganic oxideDAPVARefractive index: 1.49 1.52.Thermal conductivity: 0.2w/ (mK).Specific heat capacity: 1 5kJ/ (kg K).Resistivity: (3.13.8)10cm.MTM(Al,Mg)2Si4O10(OH)2nH2OMohs scale hardness12LusterD

4、ull, earthyDiaphaneityTranslucentSpecific gravity1.7-2Optical propertiesBiaxial (-)Refractive indexn= 1.4851.535 CS (C6H11NO4)nGO/DA Cui et al.,Acsnano. 2014Covlent bond GO/PVAPVA (1 g) was dissolved in DI water (99 g) at 90 C for 1 hGO was synthesized from graphite powder by the modified Hummers me

5、thodR-PVA/GO films were directlyimmersed into an HI solutionLiao,Adv. Mater. 2012Hydrogen bond MTM/NFC/PVAWang,Acsnano. 2014MTM/CSYao,Angew. Chem. Int. Ed. 2010Vacuum-filtration-induced self-assemblyWater-evaporation-induced self-assemblyNa-MTM in water (0.5 wt%) was stirred,centrifugedChitosan was

6、dissolved inaqueous solution of glacial acetic acid MTM and chitosan were mixed ,stirring. centrifugation , washedElectrostatic attractionHydrogen bond LDH/CSCS: Spin Coating the silylanized LDH plateletsATES, methanol, deionized water were mixed and stirred for 1 h.Adding LDH to the mixture, then s

7、tirred for 5 min.Yao,Angew. Chem. Int. Ed. 2010Hydrogen bondAl2O3/SiO2-CaOalumina platelets (7 m diameter, 500nm thickness), alumina nanoparticles (100 nm),silicacalcia liquid phase (20 nm)Schematic representation of the densification scenarioSylvain Deville. Nat mater 2014comparitionIce templationPressure-assisted sintering .Ball