Synthesis of sodium lignosulfonate from lignin extracted from oil palm empty fruit bunches by acid/alkaline treatment for reinforcement in natural rubber composites

International Conference on Materials Research and Innovation

Thungphotrakul, N.^1 ; Dittanet, P.^1 ; Loykulnunt, S.^2 ; Tanpichai, S.^3 ; Parpainainar, P.^1

National Center of Excellence for Petroleum, Petrochemicals and Advance Material, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok

10900, Thailand^1

Natural Rubber Focus Unit, National Metal and Materials Technology Center, NSTDA, 111 Paholyothin Rd., Klong 1, Klong Luang, Pathumthani

12120, Thailand^2

Learning Institute and Cellulose and Bio-based Nanomaterials Research Group, King Mongkut's University of Technology Thonburi, Bangkok

10140, Thailand^3

关键词: Acid pretreatment;    Batch methods;    Natural rubber composites;    Oil palm empty fruit bunch;    Oil palm empty fruit bunch (OPEFB);    Sodium bisulfite;    Sodium lignosulfonates;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/526/1/012022/pdf
DOI  :  10.1088/1757-899X/526/1/012022

来源: IOP

【 摘 要 】

This work studied a synthesis of sodium lignosulfonate (SLS) from the lignin which extracted from oil palm empty fruit bunches (OPEFB) by using batch method. The preparation of lignin from OPEFB was done by acid pretreatment using 1% (wt/wt) H2SO4 at 90 °C for 120 min in order to reduce hemicelluloses. Then lignin was extracted by 2.5% (wt/wt) NaOH at 90 °C for 180 min and precipitated by adjusting pH to 2 with 98% H2SO4. The obtained lignin was changed to SLS by using sodium bisulfite (NaHSO3). The study yields of prepared SLS conducted by varying concentration of NaHSO3. The obtained SLS was characterized by Fourier transform infrared spectroscopy and zeta potential compared to sodium lignosulfonate (commercial).