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
3 - Chemical Synthesis of Aerogels from Polymeric Precursors
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
The synthesis of aerogels need not to start with monomers, but also can startwith bundles of polymers of crystalline or amorphous nature. If such polymers are dissolved in a suitable medium down to their single polymeric strands, the solution can be rearranged to form an open, porous, nanostructured network by various methods, such as temperature change, pH inversion orthe addition of a suitable cross-linking salt. In this chapter, we discuss two types of aerogels made from biopolymers: cellulose and alginates. Their chemistry is explained as well as synthesis routes for wet gel preparation.
- Type
- Chapter
- Information
- The Chemistry and Physics of AerogelsSynthesis, Processing, and Properties, pp. 60 - 91Publisher: Cambridge University PressPrint publication year: 2021