Electronic Resource
Microwave-Assisted Fractionation and Functionalization of Technical Lignin Towards Thermoset Resins
| العنوان: | Microwave-Assisted Fractionation and Functionalization of Technical Lignin Towards Thermoset Resins |
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| المؤلفون: | Truncali, Alessio, Ribca, Iuliana, Yao, Jenevieve G., Hakkarainen, Minna, Johansson, Mats |
| بيانات النشر: | KTH, Ytbehandlingsteknik KTH, Wallenberg Wood Science Center KTH, Polymerteknologi |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | Lignin is the main source of aromatic natural polymers, with a potential to serve as a building block of rigid and thermally stable bio-based materials. However, because of its heterogeneity differences and not fully understood chemical structure it is still underutilized. Therefore, in this paper, technical softwood Kraft lignin is refined in to narrow-dispersity and relatively low molecular weight fractions by microwave-assisted processing. This process was carried out under non-catalytic conditions using a low boiling point solvent and higher pressure. The chemical properties of the retrieved fractions were investigated by 31P NMR, HSQC NMR, SEC, DSC, and TGA. One of the retrieved soluble lignin fractions was successfully chemically modified by microwave processing. The chemically modified lignin was characterized by 31P NMR and FTIR, which provided evidence of the introduction of the allyl moieties. Subsequently, the allylated lignin was cross-linked through thermally induced thiol-ene chemistry to produce lignin-based thermosets. QC 20230524 |
| مصطلحات الفهرس: | Softwood lignin, microwave-assisted fractionation, microwave-assisted functionalization, allylation, thiol-ene thermosets., Polymer Chemistry, Polymerkemi, Polymer Technologies, Polymerteknologi, Paper, Pulp and Fiber Technology, Pappers-, massa- och fiberteknik, Manuscript (preprint), info:eu-repo/semantics/preprint, text |
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| الاتاحة: | Open access content. Open access content |
| ملاحظة: | English |
| Other Numbers: | UPE oai:DiVA.org:kth-327223 0000-0002-1184-1310 0000-0002-8127-9183 0000-0002-6313-8539 0000-0002-7790-8987 0000-0003-3201-5138 1400069685 |
| المصدر المساهم: | UPPSALA UNIV LIBR From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1400069685 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |