Book contents
- Frontmatter
- Dedicatioin
- Contents
- Preface
- 1 Introduction
- 2 Chemical Synthesis of Aerogels from Monomeric Precursors
- 3 Chemical Synthesis of Aerogels from Polymeric Precursors
- 4 Gelation
- 5 Drying of Wet Gels
- 6 Morphology of Aerogels
- 7 Density: Models and Measures
- 8 Specific Surface Area
- 9 Pores and Pore Sizes
- 10 Diffusion in Aerogels
- 11 Permeability for Gases
- 12 Thermal Properties
- 13 Mechanical Properties of Aerogels
- 14 How to Cook Aerogels: Recipes and Procedures
- Appendix A Thermodynamics and Phase Separation in Immiscibles
- Appendix B Flory–Huggins Theory of Polymer Solutions
- Appendix C A Brief Review on Scattering
- Appendix D Mathematics of Polycondensation
- Appendix E Time-Dependent Heat Transfer through an Isolated Tube
- References
- Index
5 - Drying of Wet Gels
Published online by Cambridge University Press: 03 December 2021
Book contents
- Frontmatter
- Dedicatioin
- Contents
- Preface
- 1 Introduction
- 2 Chemical Synthesis of Aerogels from Monomeric Precursors
- 3 Chemical Synthesis of Aerogels from Polymeric Precursors
- 4 Gelation
- 5 Drying of Wet Gels
- 6 Morphology of Aerogels
- 7 Density: Models and Measures
- 8 Specific Surface Area
- 9 Pores and Pore Sizes
- 10 Diffusion in Aerogels
- 11 Permeability for Gases
- 12 Thermal Properties
- 13 Mechanical Properties of Aerogels
- 14 How to Cook Aerogels: Recipes and Procedures
- Appendix A Thermodynamics and Phase Separation in Immiscibles
- Appendix B Flory–Huggins Theory of Polymer Solutions
- Appendix C A Brief Review on Scattering
- Appendix D Mathematics of Polycondensation
- Appendix E Time-Dependent Heat Transfer through an Isolated Tube
- References
- Index
Summary
Aerogel technology provides lightweight materials with an outstanding combination of properties. One major problem for the preparation of aerogels is how to eliminate the liquid solvent from the wet gel while avoiding shrinkage, cracking and collapse of the gel structure. Several techniques have been used and are still under development. The chapter discusses three techniques to dry a wet gel: ambient or evaporative drying, freeze drying and supercritical drying. All aspects of each drying technique are explained in detail, andvarious effects of drying routines on the final aerogel structure and thus properties are discussed.
- Type
- Chapter
- Information
- The Chemistry and Physics of AerogelsSynthesis, Processing, and Properties, pp. 140 - 202Publisher: Cambridge University PressPrint publication year: 2021