Characterisation of sequential solvent fractionasation and based-catalysed depolymerisation of treated alkali lignin
An alkali lignin (OL) with a weight-average molecular weight (Mw) of 11646 g/mol was used to prepare low-molecular weight lignin for resin synthesis. The low-molecular weight lignin feedstock was obtained via base-catalysed depolymerisation (BCD) treatments at different combined severity factors. Se...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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College of Natural Resources, North Carolina State University
2015
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| Online Access: | http://psasir.upm.edu.my/id/eprint/44024/1/Characterisation%20of%20sequential%20solvent%20fractionasation%20and%20based-catalysed%20depolymerisation%20of%20treated%20alkali%20lignin.pdf |
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| author | Ang, Aikfei Ashaari, Zaidon Bakar, Edi Suhaimi Ibrahim, Nor A. |
| author_facet | Ang, Aikfei Ashaari, Zaidon Bakar, Edi Suhaimi Ibrahim, Nor A. |
| author_sort | Ang, Aikfei |
| collection | UPM |
| description | An alkali lignin (OL) with a weight-average molecular weight (Mw) of 11646 g/mol was used to prepare low-molecular weight lignin for resin synthesis. The low-molecular weight lignin feedstock was obtained via base-catalysed depolymerisation (BCD) treatments at different combined severity factors. Sequential fractionation of the OL and BCD-treated lignins using organic solvents with different Hildebrand solubility parameters were used to alter the homogeneity of the OL. The yield and properties of OL itself and OL and BCD-treated OL dissolved in propan-1-ol (F1), ethanol (F2), and methanol (F3) were determined. Regardless of the treatment applied, a small amount of OL was dissolved in F1 and F2. The BCD treatment did not increase the yield of F1 but did increase the yields of F2 and F3. Gel permeation chromatography (GPC) showed that the repolymerization reaction occurred in F3 for all BCD-treated OL, so these lignins were not suitable for use as feedstocks for resin production. The GPC, 13Carbon-nuclear magnetic resonance, and Fourier transform infrared spectroscopy analyses confirmed that the F3 in OL exhibited the optimum yield, molecular weight distribution, and chemical structure suitable for use as feedstocks for resin synthesis. |
| first_indexed | 2024-03-06T08:57:21Z |
| format | Article |
| id | upm.eprints-44024 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T08:57:21Z |
| publishDate | 2015 |
| publisher | College of Natural Resources, North Carolina State University |
| record_format | dspace |
| spelling | upm.eprints-440242022-03-11T00:38:45Z http://psasir.upm.edu.my/id/eprint/44024/ Characterisation of sequential solvent fractionasation and based-catalysed depolymerisation of treated alkali lignin Ang, Aikfei Ashaari, Zaidon Bakar, Edi Suhaimi Ibrahim, Nor A. An alkali lignin (OL) with a weight-average molecular weight (Mw) of 11646 g/mol was used to prepare low-molecular weight lignin for resin synthesis. The low-molecular weight lignin feedstock was obtained via base-catalysed depolymerisation (BCD) treatments at different combined severity factors. Sequential fractionation of the OL and BCD-treated lignins using organic solvents with different Hildebrand solubility parameters were used to alter the homogeneity of the OL. The yield and properties of OL itself and OL and BCD-treated OL dissolved in propan-1-ol (F1), ethanol (F2), and methanol (F3) were determined. Regardless of the treatment applied, a small amount of OL was dissolved in F1 and F2. The BCD treatment did not increase the yield of F1 but did increase the yields of F2 and F3. Gel permeation chromatography (GPC) showed that the repolymerization reaction occurred in F3 for all BCD-treated OL, so these lignins were not suitable for use as feedstocks for resin production. The GPC, 13Carbon-nuclear magnetic resonance, and Fourier transform infrared spectroscopy analyses confirmed that the F3 in OL exhibited the optimum yield, molecular weight distribution, and chemical structure suitable for use as feedstocks for resin synthesis. College of Natural Resources, North Carolina State University 2015 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/44024/1/Characterisation%20of%20sequential%20solvent%20fractionasation%20and%20based-catalysed%20depolymerisation%20of%20treated%20alkali%20lignin.pdf Ang, Aikfei and Ashaari, Zaidon and Bakar, Edi Suhaimi and Ibrahim, Nor A. (2015) Characterisation of sequential solvent fractionasation and based-catalysed depolymerisation of treated alkali lignin. Bioresources, 10 (3). pp. 4137-4151. ISSN 1930-2126 https://bioresources.cnr.ncsu.edu/resources/characterisation-of-sequential-solvent-fractionation-and-base-catalysed-depolymerisation-of-treated-alkali-lignin/ 10.15376/biores.10.3.4137-4151 |
| spellingShingle | Ang, Aikfei Ashaari, Zaidon Bakar, Edi Suhaimi Ibrahim, Nor A. Characterisation of sequential solvent fractionasation and based-catalysed depolymerisation of treated alkali lignin |
| title | Characterisation of sequential solvent fractionasation and based-catalysed depolymerisation of treated alkali lignin |
| title_full | Characterisation of sequential solvent fractionasation and based-catalysed depolymerisation of treated alkali lignin |
| title_fullStr | Characterisation of sequential solvent fractionasation and based-catalysed depolymerisation of treated alkali lignin |
| title_full_unstemmed | Characterisation of sequential solvent fractionasation and based-catalysed depolymerisation of treated alkali lignin |
| title_short | Characterisation of sequential solvent fractionasation and based-catalysed depolymerisation of treated alkali lignin |
| title_sort | characterisation of sequential solvent fractionasation and based catalysed depolymerisation of treated alkali lignin |
| url | http://psasir.upm.edu.my/id/eprint/44024/1/Characterisation%20of%20sequential%20solvent%20fractionasation%20and%20based-catalysed%20depolymerisation%20of%20treated%20alkali%20lignin.pdf |
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