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Fibrous residues of palm oil as a source of green chemical building blocks

机译：棕榈油的纤维残留物是绿色化学建材的来源

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Oil palm is an important industrial crop, and is usually harvested to obtain lipids and proteins. However, such biomass can be a source of important chemical biomacromolecules with several industrial applications. The aim of this work was to extract cellulose nanocrystals (CNC), cellulose nanofribrils (CNF), and lignin from pressed oil palm mesocarp fibers (POPMF). Initially, fibers were acetosolv pulped, resulting in two fractions: a lignin-rich black liquor and cellulose-rich pulp. Lignin was recovered from the black liquor and totally chlorine-free (TCF) bleaching was applied to purify the cellulose. Fibers and biomacromolecules were characterized using several methods including SEM, FEG/SEM, TEM, DRX, GPC, zeta potential, TGA, and FTIR. The pulping-bleaching treatment improved the amount of crystalline cellulose in the pulp, yielding CNC with good thermal stability, a length of 289 nm, diameter of 11 nm, and an aspect ratio of 26. The lignin presented a high purity, with a syringyl-rich structure and good thermal stability. Such characteristics highlight the potential use of POPMF lignin as a green building-block and POPMF nanocellulose materials as renewable biomaterials. (C) 2016 Elsevier B.V. All rights reserved.
机译：油棕是重要的工业作物，通常被收获以获得脂质和蛋白质。但是，这种生物质可能是重要的化学生物大分子的来源，具有多种工业应用。这项工作的目的是从压榨的棕榈果皮中果皮纤维（POPMF）中提取纤维素纳米晶体（CNC），纤维素纳米带芯纤维（CNF）和木质素。最初，纤维被乙酰丙酮浆化，得到两个部分：富含木质素的黑液和富含纤维素的纸浆。从黑液中回收木质素，并进行完全无氯（TCF）漂白以纯化纤维素。使用几种方法对纤维和生物大分子进行了表征，包括SEM，FEG / SEM，TEM，DRX，GPC，ζ电位，TGA和FTIR。制浆漂白处理提高了纸浆中结晶纤维素的含量，从而获得了具有良好热稳定性的CNC，其长度为289 nm，直径为11 nm，长径比为26。木质素具有较高的纯度，并带有丁香香基。结构丰富，热稳定性好。这些特性突出了POPMF木质素作为绿色建筑材料和POPMF纳米纤维素材料作为可再生生物材料的潜在用途。 （C）2016 Elsevier B.V.保留所有权利。

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