Development Of New Organic Wood Paints With Lignin As Additive
Lignin has been used as additive in preparation of the new organic paints. Soda lignin was extracted from black liquor of soda-AQ (anthraquinone) pulping of oil palm empty fruit bunch (EFB) fibers by 20% sulfuric acid precipitation. Two different types of azo pigment namely, phenyl-azo-2-naphthol an...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2011
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| Subjects: | |
| Online Access: | http://eprints.usm.my/41525/1/ASNIZA_MUSTAPHA.pdf |
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| Summary: | Lignin has been used as additive in preparation of the new organic paints. Soda lignin was extracted from black liquor of soda-AQ (anthraquinone) pulping of oil palm empty fruit bunch (EFB) fibers by 20% sulfuric acid precipitation. Two different types of azo pigment namely, phenyl-azo-2-naphthol and 4-Hydroxyphenylazo-3-N-(4-hydroxyphenyl)maleimide were synthesized by azo coupling reaction. Phenyl-azo-2-naphthol which was represented as aromatic azo pigment was produced from the reaction of diazonium salt (phenyldiazonium chloride) with pure 2-naphthol as the coupling agent whereas a new heterocyclic coupling agent namely, N-(4-hydroxy-phenyl)maleimide was synthesized by the reaction of maleic anhydride and p-aminophenol in the presence of di-phosphorus pentoxide (P2O5) as a catalyst. |
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