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Lignin and Lignans as Renewable Raw Materials : Chemistry, Technology and Applications.
As naturally occurring and abundant sources of non-fossil carbon, lignin and lignans offer exciting possibilities as a source of commercially valuable products, moving away from petrochemical-based feedstocks in favour of renewable raw materials. Lignin can be used directly in fields such as agricul...
| Clasificación: | Libro Electrónico |
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| Autor principal: | |
| Otros Autores: | , , |
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
Hoboken :
Wiley,
2015.
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| Temas: | |
| Acceso en línea: | Texto completo |
Tabla de Contenidos:
- Cover; Title Page; Copyright; Dedication; Contents; Series Preface; Preface; List of Acronyms; List of Symbols; Part I Introduction; Chapter 1 Background and Overview; 1.1 Introduction; 1.2 Lignin: Economical Aspects and Sustainability; 1.3 Structure of the Book; References; Part II What is Lignin?; Chapter 2 Structure and Physicochemical Properties; 2.1 Introduction; 2.2 Monolignols, The Basis of a Complex Architecture; 2.3 Chemical Classification of Lignins; 2.4 Lignin Linkages; 2.5 Structural Models of Native Lignin; 2.5.1 Softwood Models; 2.5.2 Hardwood Models.
- 2.5.3 Herbaceous Plant Models2.6 Lignin-Carbohydrate Complex; 2.7 Physical and Chemical Properties of Lignins; 2.7.1 Molecular Weight; 2.7.2 Dispersity Index (Đ); 2.7.3 Thermal Properties; 2.7.4 Solubility Properties; References; Chapter 3 Detection and Determination; 3.1 Introduction; 3.2 The Detection of Lignin (Color-Forming Reactions); 3.2.1 Reagents for Detecting Lignins; 3.3 Determination of Lignin; 3.4 Direct Methods for the Determination of Lignin; 3.4.1 Methods for Lignin as a Residue; 3.4.2 Lignin in Solution Methods; 3.5 Indirect Methods for the Determination of Lignin.
- 3.5.1 Chemical Methods3.5.2 Spectrophotometric Methods; 3.5.3 Methods Based on Oxidant Consumption; 3.6 Comparison of the Different Determination Methods; References; Chapter 4 Biosynthesis of Lignin; 4.1 Introduction; 4.2 The Biological Function of Lignins; 4.3 The Shikimic Acid Pathway; 4.4 The Common Phenylpropanoid Pathway; 4.5 The Biosynthesis of Lignin Precursors (the Monolignol-Specific Pathway); 4.5.1 The Biosynthesis of Other Monolignols; 4.5.2 The Transport of Monolignols; 4.6 The Dehydrogenation of the Precursors; 4.7 Peroxidases and Laccases; 4.8 The Radical Polymerization.
- 4.8.1 Dimerization4.8.2 Quinone Methides; 4.8.3 Lignification; 4.8.4 Interunit Linkage Types; 4.8.5 Dehydrogenation Polymer (DHP); 4.9 The Lignin-Carbohydrate Connectivity; 4.10 Location of Lignins (Cell Wall Lignification); 4.11 Differences Between Angiosperm and Gymnosperm Lignins; References; Part III Sources and Characterization of Lignin; Chapter 5 Isolation of Lignins; 5.1 Introduction; 5.2 Methods for Lignin Isolation from Wood and Grass for Laboratory Purposes; 5.2.1 Lignin as Residue; 5.2.2 Lignin by Dissolution; 5.3 Commercial Lignins; 5.3.1 Kraft Lignin.
- 5.3.2 Sulfite Lignin (Lignosulfonate Process)5.3.3 Soda Lignin (Alkali Lignin); 5.3.4 Organosolv Pulping; 5.3.5 Other Methods of Separation of Lignin from Biomass; References; Chapter 6 Functional and Spectroscopic Characterization of Lignins; 6.1 Introduction; 6.2 Elemental Analysis and Empirical Formula; 6.3 Determination of Molecular Weight; 6.3.1 Gel-Permeation Chromatography (GPC); 6.3.2 Light Scattering; 6.3.3 Vapor-Pressure Osmometry (VPO); 6.3.4 Ultrafiltration (UF); 6.4 Functional Group Analyses; 6.4.1 Methoxyl Group (MeO); 6.4.2 Phenolic Hydroxyl Group (OH ph).