@inbook {1835, title = { Organosolv Processes }, booktitle = {BIOREFINERIES}, volume = {166}, number = {Advances in Biochemical Engineering-Biotechnology}, year = {2019}, pages = {153-176}, abstract = {

Biofuels and chemicals can be produced from lignocellulosic feedstocks using biotechnological processes. The effective utilization of carbohydrates from biomass for the production of biofuels necessitates the development of pretreatment technologies to enhance their enzymatic digestibility. Among all the various pretreatment methods currently studied and developed, the organosolv processes, in which organic solvents or aqueous organic solvent mixtures are used as the pretreatment medium, appear to be specially promising in the context of the biorefinery because (1) they produce cellulosic pulp with a good enzymatic digestibility for monomeric glucose production and (2) they allow a clean fractionation of the major biomass components (cellulose, lignin, and hemicelluloses) into three process streams. In this chapter we give an updated overview of organosolv methods using conventional solvents and ionic liquids which have recently gained considerable interest as solvents for lignocellulosic biomass and pretreatment.

}, author = {N. BROSSE and M.H. HUSSIN and A.A. RAHIM} } @article {1811, title = { The structural characterization and antioxidant properties of oil palm fronds lignin incorporated with p-hydroxyacetophenone }, journal = { INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES }, volume = {130}, year = {2019}, pages = {947-957}, abstract = {

This study reports on the effects of unmodified autohydrolyzed ethanol organosolv lignin (AH EOL) and modified autohydrolyzed ethanol organosolv lignin on the structural characteristics and antioxidant properties upon incorporation of p-hydroxyacetophenone (AHP EOL). The lignin samples isolated from black liquor of oil palm fronds (OPF) were evaluated and compared using various complementary analyses; FTIR, H-1 and C-13 NMR spectroscopy, 2D-NMR spectroscopy (FIMBC and HSQC), CHN, GPC, HPLC and thermal analyses (TGA and DSC). Chemically modified organosolv lignin (AHP EOL) provided lignin with lower molecular weight (M-W), which has smaller fragments that leads to higher solubility rate in water in comparison to unmodified organosolv lignin, AH EOL (D-AHP EOL: 19.8\% \> D-AH EOL: 14.0\%). It was evident that the antioxidant properties of modified organosolv lignin has better reducing power in comparison to the unmodified organosolv lignin. Therefore, the functionalization of lignin polymers enhanced their antioxidant properties and structural features towards a various alternative approach in lignin-based applications.

}, url = {https://hal.univ-lorraine.fr/hal-02296950}, author = {N.H. ABD-LATIF and A.A. RAHIM and N. BROSSE and M.H. HUSSIN} } @article {1660, title = { Modification of oil palm fronds lignin by incorporation of m-cresol for improving structural and antioxidant properties }, journal = { INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES }, volume = {104}, year = {2017}, pages = {251-260}, abstract = {

Lignin extracted from oil palm fronds (OPF) underwent chemical modification by incorporating m-cresol into the lignin matrix. This study reports on the physicochemical properties and antioxidant activity of unmodified autohydrolyzed ethanol organosolvlignin (AH EOL) and the modified autohydrolyzed ethanol organosolv lignin (AHC EOL). The lignin samples were analyzed by FFIR, H-1 and C-13 NMR spectroscopy, 2D NMR: HSQC spectroscopy, CHN analysis, molecular weight distribution analysis; GPC and thermal analysis; DSC and TGA. The lignin modification has reduced the hydrophobicity of its complex structure by providing better quality lignin with smaller fragments and higher solubility rate in water (D-AHCEOL.: 42\%\> D-AHEOL: 25\%). It was revealed that the modification of lignin has improved their structural and antioxidant properties, thus venture their possible applications.

}, url = {https://hal.univ-lorraine.fr/hal-01765057}, author = {N.A. SA{\textquoteright}DON and A.A. RAHIM and M.N.M. IBRAHIM and N. BROSSE and M.H. HUSSIN} } @article {1657, title = { The capability of ultrafiltrated alkaline and organosolv oil palm (Elaeis guineensis) fronds lignin as green corrosion inhibitor for mild steel in 0.5 M HCl solution }, journal = { MEASUREMENT }, volume = {78}, year = {2016}, pages = {90-103}, abstract = {

The inhibitive effect of ultrafiltrated oil palm fronds (OPF) lignins on the corrosion of mild steel in 0.5 M HCl solution has been investigated by electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PP) and weight loss measurement. The presence of smaller lignin fractions reduces remarkably the corrosion rate of mild steel. The highest corrosion inhibition efficiency for all ultrafiltrated lignins were attained at maximum concentration of 500 ppm (IEP.Soda: 87\% \> IEP.Organosolv: 83\% \> IEP.Kraft: 81\%). The results from this corrosion test clearly reveal that all ultrafiltrated lignins behaved as a mixed-type inhibitor with predominant anodic (organosolv lignin) or cathodic (alkaline lignin) effectiveness. It was deduced that the inhibition process was spontaneous and the inhibitors were mainly physically adsorbed onto the mild steel surface.

}, author = {M.H. HUSSIN and A.A. RAHIM and M.N.M. IBRAHIM and N. BROSSE} } @article {1598, title = { Physicochemical of microcrystalline cellulose from oil palm fronds as potential methylene blue adsorbents }, journal = { INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES }, volume = {92}, year = {2016}, pages = {11-19}, abstract = {

The present study sheds light on the physical and chemical characteristics of microcrystalline cellulose (MCC) isolated from oil palm fronds (OPF) pulps. It was found that the OPF MCC was identified as cellulose II polymorph, with higher crystallinity index than OPF alpha-cellulose (CrIOPFMCC: 71\%\> CrIOPF alpha-cellulose 47\%). This indicates that the acid hydrolysis allows the production of cellulose that is highly crystalline. BET surface area of OPF MCC was found to be higher than OPF alpha-cellulose (S-BETOPFMCC: 5.64 m(2) g(-1) \> SBETOPF alpha-cellulose :Q(a)(0) 2.04 m(2) g(-1)), which corroborates their potential as an adsorbent. In batch adsorption studies, it was observed that the experimental data fit well with Langmuir adsorption isotherm in comparison to Freundlich isotherm. The monolayer adsorption capacity (Q(a)(0)) of OPF MCC was found to be around 51.811 mg g(-1) and the experimental data fitted well to pseudo-second-order kinetic model.

}, author = {M.H. HUSSIN and N.A. POHAN and Z.N. GARBA and M.J. KASSIM and A.A. RAHIM and N. BROSSE and M. YEMLOUL and M.R.N. FAZITA and M.K.M. HAAFIZ} } @article {1249, title = {Antioxidant and anti corrosive properties of oil palm frond lignins extracted with different techniques. }, journal = {Ann. Forest Sc. }, volume = {72}, year = {2015}, month = {2015}, chapter = {17}, author = {M.H. HUSSIN and A. MOHD-SHAH and A.A. RAHIM and M.N. MOHAMAD-IBRAHIM and D. PERRIN and N. BROSSE} } @article {1252, title = {Enhanced properties of oil palm fronds (OPF) lignin fractions produced via tangential ultrafiltration technique }, journal = {Ind. Crops \& Prod.}, volume = {66}, year = {2015}, month = {2015}, chapter = {1}, author = {M.H. HUSSIN and A.A. RAHIM and M.N. MOHAMAD-IBRAHIM and D. PERRIN and N. BROSSE} } @article {1557, title = {Improved corrosion inhibition of mild steel by chemically modified lignin polymers from Elaeis guineensis agricultural waste}, journal = {MATERIALS CHEMISTRY AND PHYSICS}, volume = {163}, year = {2015}, pages = {201-212}, abstract = {

This article describes that the modification of lignin by incorporation of aromatic scavengers (2-naphthol: AHN EOL and 1,8-dihydroxyanthraquinone: AHD EOL) during delignification process has improved the physical properties of the lignin fractions. Smaller fragments of lignin with high phenolic -OH content, increased solubility and antioxidant activity have led to improved inhibitive property of the modified lignin. The inhibition efficiency (84-93\%) of both modified lignin (500 ppm) were observed to be better than unmodified organosolv lignin (EOL). It was deduced that the inhibition process was spontaneous and the inhibitors were mainly physically adsorbed onto the mild steel surface.

}, author = {M.H. HUSSIN and A.A. RAHIM and M.N.M. IBRAHIM and N. BROSSE} } @article {1544, title = {Preparation and Characterization of Lignin Polyols from the Residues of Oil Palm Empty Fruit Bunch}, journal = {BIORESOURCES}, volume = {10}, year = {2015}, pages = {7339-7352}, abstract = {

In this work, lignin polyols were prepared from the liquefaction of kraft lignin and from the direct liquefaction of Elaeis guineensis lignocellulosic waste. The liquefaction reaction was performed with polyhydric alcohols using sulfuric acid as catalyst at 160 degrees C. The physical and chemical characterizations of lignin and lignin polyols were conducted by elemental analysis, Fourier transform-infrared spectroscopy, H-1 and C-13 nuclear magnetic resonance (NMR) spectroscopy, molecular weight distribution, and thermogravimetric analysis (TGA). Quantitative C-13 NMR showed that all aliphatic hydroxyl group values of polyols noticeably increased with the use of the two methods compared to kraft lignin. The average molecular weight analysis of the liquefied product showed that it exhibited high molecular weight compared to kraft lignin. Both structural and thermal characteristics suggest that lignin polyols would be a good substitute for kraft lignin in the synthesis of polymeric compounds such as environmentally friendly resins or wood adhesives, as it presents higher amounts of activated free ring positions, higher molecular weight, and high thermal stability.

}, url = {https://hal.archives-ouvertes.fr/LERMAB-UL/hal-01598213}, author = {A.H. FARIS and M.N.M. IBRAHIM and A.A. RAHIM and M.H. HUSSIN and N. BROSSE} } @article {1244, title = {Impact of catalytic oil palm fronds (OPF)pulping on organosolv lignin properties. }, journal = {Polymer Degradation and Stability}, volume = {109}, year = {2014}, month = {2014}, chapter = {33}, author = {M.H. HUSSIN and A.A. RAHIM and M.N. MOHAMAD-IBRAHIM and D. PERRIN and M. YEMLOUL and N. BROSSE} } @article {1245, title = {UPLC method for the determination of vitamin E homologue and derivatives in vegetable oils, margarines and supplement capsules using pentafluorophenyl column}, journal = {Talanta}, volume = {130}, year = {2014}, month = {2014}, chapter = {299}, author = {Y. FOO-WONG and A. MAKAHLEH and B. SAAD and M.N. MOHAMAD-IBRAHIM and A.A. RAHIM and N. BROSSE} }