Rust Conversion Studies Of Archeological Irons From Fort Cornwallis Using Modified Oil Palm Fronds Lignin
This research reveals the structural and antioxidant properties of extracted organosolv lignin samples derived from oil palm fronds (OPF) pretreated with autohydrolysis upon incorporation with 1,5-dihydroxy naphthalene (AHD EOL) and p-benzoquinone (AHPB EOL) and steam explosion pretreatment impregna...
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| Format: | Thesis |
| Language: | English |
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2024
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| Online Access: | http://eprints.usm.my/62185/ http://eprints.usm.my/62185/1/LIYANA%20SYAFAWATI%20BINTI%20OSMAN%20-%20TESIS24.pdf |
| _version_ | 1848884912994648064 |
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| author | Osman, Liyana Syafawati |
| author_facet | Osman, Liyana Syafawati |
| author_sort | Osman, Liyana Syafawati |
| building | USM Institutional Repository |
| collection | Online Access |
| description | This research reveals the structural and antioxidant properties of extracted organosolv lignin samples derived from oil palm fronds (OPF) pretreated with autohydrolysis upon incorporation with 1,5-dihydroxy naphthalene (AHD EOL) and p-benzoquinone (AHPB EOL) and steam explosion pretreatment impregnated with diluted sulfuric acid (SEA EOL). It was revealed that AHPB EOL had the highest percentage of yield among other organosolv lignin samples (% yield AHPB EOL: 13.79 ± 0.17% > % yield SEA EOL: 13.66 ± 0.35% > % yield AHD EOL: 13.09 ± 1.03% > % yield AH EOL: 12.40 ± 1.18%). Various organosolv lignin samples were then evaluated with elemental analysis, Fourier transform infrared (FTIR), nuclear magnetic resonance (NMR), gel permeation chromatography (GPC), thermogravimetric (TGA), differential-scanning calorimeter (DSC), solubility test, and antioxidant activity. Throughout the analyses, modified organosolv lignin (AHD EOL and AHPB EOL) and steam explosion acid impregnation organosolv lignin (SEA EOL) exhibited smaller lignin matrix with higher phenolic content (phenolic-OH SEA EOL: 0.60/Ar > phenolic-OH AHPB EOL: 0.47/Ar > phenolic-OH AHD EOL: 0.45/Ar > phenolic-OH AH EOL: 0.40/Ar), which leads to higher water solubility (D% SEA EOL: 29.50 ± 0.11% > D% AHPB EOL: 24.25 ± 0.13% > D% AHD EOL: 22.50 ± 0.16% > D% AH EOL: 20.50 ± 0.22%) and antioxidant activity compared to unmodified organosolv lignin (AH EOL). |
| first_indexed | 2025-11-15T19:14:15Z |
| format | Thesis |
| id | usm-62185 |
| institution | Universiti Sains Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T19:14:15Z |
| publishDate | 2024 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | usm-621852025-05-06T04:13:30Z http://eprints.usm.my/62185/ Rust Conversion Studies Of Archeological Irons From Fort Cornwallis Using Modified Oil Palm Fronds Lignin Osman, Liyana Syafawati QD1-999 Chemistry This research reveals the structural and antioxidant properties of extracted organosolv lignin samples derived from oil palm fronds (OPF) pretreated with autohydrolysis upon incorporation with 1,5-dihydroxy naphthalene (AHD EOL) and p-benzoquinone (AHPB EOL) and steam explosion pretreatment impregnated with diluted sulfuric acid (SEA EOL). It was revealed that AHPB EOL had the highest percentage of yield among other organosolv lignin samples (% yield AHPB EOL: 13.79 ± 0.17% > % yield SEA EOL: 13.66 ± 0.35% > % yield AHD EOL: 13.09 ± 1.03% > % yield AH EOL: 12.40 ± 1.18%). Various organosolv lignin samples were then evaluated with elemental analysis, Fourier transform infrared (FTIR), nuclear magnetic resonance (NMR), gel permeation chromatography (GPC), thermogravimetric (TGA), differential-scanning calorimeter (DSC), solubility test, and antioxidant activity. Throughout the analyses, modified organosolv lignin (AHD EOL and AHPB EOL) and steam explosion acid impregnation organosolv lignin (SEA EOL) exhibited smaller lignin matrix with higher phenolic content (phenolic-OH SEA EOL: 0.60/Ar > phenolic-OH AHPB EOL: 0.47/Ar > phenolic-OH AHD EOL: 0.45/Ar > phenolic-OH AH EOL: 0.40/Ar), which leads to higher water solubility (D% SEA EOL: 29.50 ± 0.11% > D% AHPB EOL: 24.25 ± 0.13% > D% AHD EOL: 22.50 ± 0.16% > D% AH EOL: 20.50 ± 0.22%) and antioxidant activity compared to unmodified organosolv lignin (AH EOL). 2024-09 Thesis NonPeerReviewed application/pdf en http://eprints.usm.my/62185/1/LIYANA%20SYAFAWATI%20BINTI%20OSMAN%20-%20TESIS24.pdf Osman, Liyana Syafawati (2024) Rust Conversion Studies Of Archeological Irons From Fort Cornwallis Using Modified Oil Palm Fronds Lignin. Masters thesis, Universiti Sains Malaysia. |
| spellingShingle | QD1-999 Chemistry Osman, Liyana Syafawati Rust Conversion Studies Of Archeological Irons From Fort Cornwallis Using Modified Oil Palm Fronds Lignin |
| title | Rust Conversion Studies Of Archeological Irons From Fort Cornwallis Using Modified Oil Palm Fronds Lignin |
| title_full | Rust Conversion Studies Of Archeological Irons From Fort Cornwallis Using Modified Oil Palm Fronds Lignin |
| title_fullStr | Rust Conversion Studies Of Archeological Irons From Fort Cornwallis Using Modified Oil Palm Fronds Lignin |
| title_full_unstemmed | Rust Conversion Studies Of Archeological Irons From Fort Cornwallis Using Modified Oil Palm Fronds Lignin |
| title_short | Rust Conversion Studies Of Archeological Irons From Fort Cornwallis Using Modified Oil Palm Fronds Lignin |
| title_sort | rust conversion studies of archeological irons from fort cornwallis using modified oil palm fronds lignin |
| topic | QD1-999 Chemistry |
| url | http://eprints.usm.my/62185/ http://eprints.usm.my/62185/1/LIYANA%20SYAFAWATI%20BINTI%20OSMAN%20-%20TESIS24.pdf |