Recovery of Kraft Lignin from OPEFB and Using for Lignin–Agarose Hydrogel
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Lignins from the spent pulping liquor were normally acquired as waste product of pulp and paper mills. The possibilities of utilizing kraft lignin have yet been developed for commercial innovation. The objectives of this research are to recovery and utilization of lignin from black liquor of oil palm empty fruit bunches (OPEFBs). Kraft lignins from the OPEFBs black liquor were recovered by acidification procedure. They were precipitated at pH 4, 3, and 2 in order that determine the optimum pH for isolation. It can be clearly seen that the best condition of lignin precipitation was at pH 3. It offered the highest yield and purity. The kraft lignin and agarose were utilized as the crude material for the production of lignin–agarose hydrogel. Lignin–agarose hydrogel could be prepared by using epichlorohydrin as the cross-linking agent. The cross-linking occurrence was recognized by FTIR. Physical and chemical properties of hydrogel were investigated. Gel strength of lignin–agarose hydrogel was characterized by texture personal analysis. The results demonstrated that the gel strength increased with increasing of lignin and epichlorohydrin (ECH) in agarose solutions. 5% lignin, 5% agarose and 10 mL ECH contributed the best gel formation and the great mechanical properties. The effect of cross-linking condition on the gel properties, for example, gel hardness and fracturability, was examined.
KeywordsKraft black liquor OPEFB’s lignin Optimum condition Lignin–agarose hydrogel Textural analysis
The authors are extremely grateful to the Graduate School at Prince of Songkla University, the Office of the Higher Educations Commission at the Ministry of Education and Yala Rajaphat University (YRU) for financial support.
- 1.Alén R, MânVu TP, Pakkanen H (2003) Delignification of bamboo (Bambusa procera acher): part 1. Kraft pulping and the subsequent oxygen delignification to pulp with a low kappa number. Ind Crops Prod 19(1):47–57Google Scholar
- 2.Theliander H (2007) Recovery of cooking chemicals; the treatment and burning of black liquor. Ljungberg textbook, pulp and paper chemistry and technology, book 2, pulping chemistry and technology ed(s), fiber and polymer technology. KTH, StockholmGoogle Scholar
- 8.Hofrichter M, Steinbuchel A (2001) Lignin, humic substances and coal. Biopolymer 1:89–127Google Scholar
- 13.Mano J, Silva G, Azevedo HS, Malafaya P, Sousa R, Silva S, Boesel L, Oliveira JM, Santos T, Marques A (2007) Natural origin biodegradable systems in tissue engineering and regenerative medicine: present status and some moving trends. J R Soc Interface 4(17):999–1030CrossRefPubMedPubMedCentralGoogle Scholar
- 15.Saake B, Lehnen R (2007) Size-exclusion chromatography of technical lignins in dimethyl sulfoxide/water and dimethylacetamide. J Chromatogr A 1102:154–163Google Scholar
- 27.Lin J, Chen XY, Chen CY, Hu JT, Zhou C, Cai XF, Zheng Ch, Zhang PP, Cheng J, Guo Z (2018) Durably antibacterial and bacterially anti-adhesive cotton fabrics coated by cationic fluorinated polymers. ACS Appl Mater Interfaces. https://doi.org/10.1021/acsami.7b16235 CrossRefPubMedPubMedCentralGoogle Scholar
- 36.TAPPI: T222-om-02. Technical Association of the Pulp and Paper Industry 1983 (reaffirmation in 2006)Google Scholar
- 44.Gwartney EA, Larick DK, Foegeding EA (2004) Sensory texture and mechanical properties of stranded and particulate whey protein emulsion gels. J Food Sci 69:5333–5339Google Scholar
- 48.Sarkanen KV, Chang HM, Ericsson B (1967) Species variation in lignins I infrared spectra of guaiacyl and syringyl models. Tappi 50(11):572–575Google Scholar
- 51.Socrates G (2004) Organic halogen compounds. In: Infrared and Raman characteristic group frequencies: tables and charts, 3rd edn. Wiley, Chichester, pp 198–208Google Scholar