Academic Journal
Understanding sulfonated kraft lignin re-polymerization by ultrafast reactions in supercritical water
| العنوان: | Understanding sulfonated kraft lignin re-polymerization by ultrafast reactions in supercritical water |
|---|---|
| المؤلفون: | Adamovic, Tijana, Zhu, Xuhai, Pérez, Eduardo, Balakshin, Mikhail, Cocero Alonso, María José |
| بيانات النشر: | Elsevier |
| سنة النشر: | 2022 |
| المجموعة: | UVaDOC - Repositorio Documental de la Universidad de Valladolid |
| مصطلحات موضوعية: | Diarylmethanes, Diarilmetano, Vanillin, Vanilina, Supercritical water, Agua supercrítica |
| الوصف: | Producción Científica ; Re-polymerization reactions are a commonly reported issue on the way to the higher recovery of monomers from lignin. The reactivity of monomers obtained from lignin depolymerization and their contribution to the re-polymerization in supercritical water (SCW) was investigated. Sulfonated Kraft lignin (SKL) was used along with four monomers: vanillin, vanillic acid, vanillyl alcohol and acetovanillone. Indulin Kraft lignin was also employed as the reference to understand the re-polymerization of SKL in SCW. The formation of diarylmethane structures was detected in HSQC spectra of solid residue after the SCW process. Lignin released fragments with free phenolic β-O-4 structures, as well as the monomeric product vanillyl alcohol are involved with the formation of o-o´ and o-p´ diarylmethane structures. Chemical structure of Kraft lignin and its polymeric product after the SCW process was remarkably similar, as shown by HSQC, indicating that re-polymerization reactions occur through cross-linking polymerization, mainly in their fractions of low molecular weight products. ; Ministerio de Ciencia, Innovación y Universidades - Fondo Europeo de Desarrollo Regional (projects CTQ2016-79777-R and PID2019-105975GB-I00) ; Junta de Castilla y León (project CLU-2019-04 T) |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0896-8446 |
| Relation: | https://www.sciencedirect.com/science/article/pii/S0896844622002510?via%3Dihub; https://doi.org/10.1016/j.supflu.2022.105768; The Journal of Supercritical Fluids, Volume 191, 2022, 105768; https://uvadoc.uva.es/handle/10324/55973 |
| DOI: | 10.1016/j.supflu.2022.105768 |
| الاتاحة: | https://uvadoc.uva.es/handle/10324/55973 https://doi.org/10.1016/j.supflu.2022.105768 |
| Rights: | Attribution-NonCommercial-NoDerivatives 4.0 Internacional ; info:eu-repo/semantics/openAccess ; http://creativecommons.org/licenses/by-nc-nd/4.0/ ; © 2022 The Authors |
| رقم الانضمام: | edsbas.A8140DFE |
| قاعدة البيانات: | BASE |
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