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From Shanghai to London

From Shanghai to London. Asia-link program report Qin Chen & Rong Zeng. 10/09/2005 fly from Shanghai to London. VS251. Queen Mary and Westfield college, University of London. We are here. New life in the year. #86, Aston Street, London E14 7NQ. The new group and supervisor.

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From Shanghai to London

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  1. From Shanghai to London Asia-link program report Qin Chen & Rong Zeng

  2. 10/09/2005 fly from Shanghai to London VS251

  3. Queen Mary and Westfield college, University of London We are here

  4. New life in the year #86, Aston Street, London E14 7NQ

  5. The new group and supervisor

  6. The lab and equipment

  7. About our new project • All cellulose composite • Make biodegradable composite from 100% nature cellulose fiber. • This composite can provide excellent property. • Thermo sensitive chitosan hydrogels for biomaterials applications

  8. CH2OH O O OH OH n Background information Biomass Cellulose ☆Most abundant (1011 t/year) ☆High mechanical properties (ex. Crystal modulus El = 138 GPa1)) ☆ Thermal stability ☆ Biodegradability Hydrogen bonding 478 372 PBO PBZT Steel 200 PE Maximum specimen modulus Ymax (GPa) Kevlar Kevlar 49 1 Cellulose I Kevlar49 100 Glass PVA Technora Vectran Al Kevlar Reinforcing fiber for composite Rodrun Ekonol it.PP PEEK Silk Chitin PET Nylon6 PEK PEN 0 0 100 200 372 478 Crystal modulus El (GPa) Fig. Relationship between the crystal modulus El and the maximum specimen modulus Ymax already reported for various polymers.

  9. Matrix Self-reinforced Composite All-Cellulose Composite Interfacial Problems Interfacial Problems ☆ High performance GFRP alternate ☆ Sustainable resource ☆ All biodegradable Environmental friendly ▼Compatibility ▼Stress transfer ▼ Compatibility ▼ Stress transfer Matrix Fiber Cellulose Interfaceless Mechanical properties Mechanical properties Fiber Reinforced Composite Reinforcing fiber Matrix Matrix Fiber Interface

  10. Ramie fiber self-reinforced Composite Cellulose solution as Matrix Surface dissolving OR Compression Dry Parallel aligned cellulose fibers All-cellulose composite

  11. Solvent exchange To dissolve natural cellulose, we follow the process: Nature fiber LiCl(8%) dissolved in cool DMAc(N, N-dimethylacetamide) Immersed in distilled water, acetone, and DMAc, each for 24hrs successively. (solvent exchange) Mix Fiber dissolved in 15hrs. And get the clear matrix (from 1% to 7%)

  12. Methodology 1% to7% ramie fiber concentration in 8% LiCl/DMAc Fibre alignment Impregnation (vacuum bag), 24 hours

  13. Methodology Gelation(24h),solvent exchange (methanol) then Room temperature drying, 12 hours Vacuum oven drying, at 80 C, 24 hours Final composite

  14. Mechanical Properties

  15. Mechanical Properties

  16. TGA Thermogram

  17. X-Ray Diffraction Pattern

  18. Scanning Electron Micrographs Cross-Sectional View of Fracture Surface (80% fiber, use 1% ramie matrix)

  19. Scanning Electron Micrographs Cross-Sectional View of Fracture Surface (80% fiber, use 1% ramie matrix)

  20. Scanning Electron Micrographs Cross-Sectional View of Fracture Surface 100% fiber.

  21. Main references Main references • Nishino, Macromolecules, Sep.2004 • Anne-Laurence, Polymer 44 (2003) 4117–4126 • Antje Potthast, Cellulose 9: 41–53, 2002. • Chanzy, Appl Polym Symp , p 239-259 ,1983 • Chanzy, J POLYM SCI POLYM PHYS ED , p 1909-1924 ,1982 • Peijs, T. Materials today 2003, 6, 30. • S Morris, Nanotechnology 15 (2004) 1296–1301 • Elisabeth, Carbohydrate Polymers 32 (1997) 5143 ……

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