Reactivity Enhancement of Lignin Extracted from Preconditioning Refiner Chemical-Recycle Bleached Mechanized Pulp (PRC-RBMP) Black Liquor by Phenolation
نویسندگان
چکیده
Despite black liquor’s (BL) renown as a difficult-to-manage contaminant in the pulp and paper industry, BL has been found viable alternative material for adhesive formulation due to its high lignin content. Nevertheless, modification is required enhance lignin’s reactivity, there currently lack of study focusing on this aspect BL-lignin. This aims increase phenolic hydroxyl content BL-lignin by phenolation. After being phenolated at phenol ratio 1:1, temperature 100°C 110 minutes, with addition 8% sulfuric acid (H2SO4) catalyst, improved 51.5%. The results Fourier transform infrared spectroscopy (FTIR), UV/Vis spectrophotometry, proton nuclear magnetic resonance (1H-NMR), thermogravimetry-differential scanning calorimetry (TG-DSC), differential curve showed that structural change opened up more active sites, implying could be good substitute phenol-formaldehyde resin manufacturing.
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ژورنال
عنوان ژورنال: pertanika journal of science and technology
سال: 2023
ISSN: ['0128-7680', '2231-8526']
DOI: https://doi.org/10.47836/pjst.31.5.28