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Fiber Boards Production from Cynara cardunculus Without Using Synthetic Resins

Fiber Boards Production from Cynara cardunculus Without Using Synthetic Resins. Camilo Mancera Arias Supervisor: Dr. Francesc Ferrando Piera Co- Supervisor: Dr. Joan Salvadó i Rovira. Introduction. Objectives. Work Plan. Discussion Topics. Discussion Topics. Outline Steam Explosion

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Fiber Boards Production from Cynara cardunculus Without Using Synthetic Resins

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  1. Fiber Boards Production from Cynara cardunculus Without Using Synthetic Resins Camilo Mancera Arias Supervisor: Dr. Francesc Ferrando Piera Co- Supervisor: Dr. Joan Salvadó i Rovira

  2. Introduction Objectives Work Plan Discussion Topics Discussion Topics Outline Steam Explosion Pressing Characterization Summary

  3. Importance of the project • Userenewable resources vs fossil resources • Increase aggregated value of agricultural residues • Construction materials Fiber boards. Introduction 1

  4. Cynara cardunculus • Wild Artichoke • Native from Mediterranean regions. • Potentially High energetic properties. • Source of Lignocellulosic biomass. • Research group projects association 2

  5. Fiber Boards • Definition • Agglomeration of fibers • Adhesives • Pressure and Temperature • Classification • Hard Fiber Boards (800-1000 kg/m3) • Medium Density Fiber Boards (600-800 kg/m3) • Semi-hard or light fiber boards (350-600 kg/m3) 3

  6. Lignin 4

  7. Objectives Production of fiber boards of commercial quality from Cynara cardunculus with better ecological properties. • Particular • Chemical characterization • Steam explosion • Identification and optimization of relevant factors • Study of other variables, soft grinding, exogenous lignin, etc. • Comparisons 5

  8. Work Plan 6

  9. Steam Explosion • Operation conditions • Water Vapor at 30-40 bars and 160-260 ºC. • Residence times of few min. Steam Explosion Reactor Pneumatic Valve • How it works… • Impregnation • Flash Expansion • Extractives and Hemicelluloses Dissolution. • Fibers Partial Rupture Tank Lay Out Laboratory Scheme 7

  10. Lignin flow and redistribution • Lignin – Fiber chemical bond formation • Operation conditions Board properties Pressing 8

  11. Characterization of Fiber Boards • Mechanical Characterization • Modulus of Rupture • Modulus of Elasticity • Internal Bond • Physical Characterization • Density • Water Absorption • Thickness Swelling • Chemical Characterization • Ashes • Lignin • Cellulose • Hemicelluloses 9

  12. Target Properties • Mechanical Properties M. sinensis • Modulus of Rupture = 61,2 MPa • Modulus of Elasticity = 7500 MPa • Internal Bond = 1,8 MPa • Mechanical Properties EU Std • Modulus of Rupture ≥ 40 MPa • Modulus of Elasticity ≥ 3000 MPa • Internal Bond ≥ 0,7 MPa • Physical Characterization M. sinensis • Density = 1100 kg/m3 • Water Absorption = 15,3% • Thickness Swelling = 5% • Physical Characterization EU Std • Density > 800 kg/m3 • Water Absorption ≤ 30% • Thickness Swelling ≤ 20% 10

  13. Summary 11

  14. Ph. D. Student Camilo Mancera Arias Universitat Rovira i Virgili Tarragona, Spain – January 2005 email: camilo.mancera@urv.net 12

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