Chemical composition of abaca (Musa textilis) leaf fibers used for manufacturing of high quality paper Pulps
Chemical composition of abaca (Musa textilis) leaf fibers used for manufacturing of high quality paper Pulps
复制标题
DOI：
10.1021/jf053016n
复制
发表时间：
2006-06-28
影响因子：
6.1
通讯作者：
Gutierrez, Ana
中科院分区：
文献类型：
--
作者：
del Rio, Jose C.;Gutierrez, Ana
本文对优质纸浆原料芭蕉叶纤维的化学组成进行了研究。结果表明，木质素含量为13.2%。通过热解结合气相色谱-质谱法（Py-GC/MS）对马尼拉麻纤维进行分析，主要释放来自木质素和对羟基肉桂酸的化合物，以及大量的4-乙烯基苯酚。后一种化合物被证明是由对香豆酸产生的，通过在四甲基氢氧化铵的存在下热解马尼拉麻纤维，释放出大量的对香豆酸（作为甲基衍生物）。在对马尼拉麻纤维进行Py-GC/MS分析后，还释放出对羟基苯基（H）、愈创木基（G）和双辛基（S）类丙烷单元的产物，后者占优势（H：G：S摩尔比为1.5：1：4.9）。芥子基和松柏基乙酸酯，被认为是木质素单体前体，也发现在马尼拉麻。马尼拉麻纤维的抽出物含量较低（0.4%），最主要的化合物是游离甾醇（占总抽出物的24%）和脂肪酸（占总抽出物的24%）。此外，显著量的类固醇酮（10%）、甘油三酯（6%）、ω-羟基脂肪酸（6%）、甘油单酯（4%）、脂肪醇（4%）和一系列对羟基肉桂基（p-hydroxycinnamyl）还发现了用长链醇和ω-羟基脂肪酸酯化的β-香豆酸和阿魏酸，以及少量的甾体烃、甘油二酯、α-羟基脂肪酸，甾醇酯，和甾醇糖苷。
The chemical composition of leaf fibers of abaca ( Musa textilis), which are commonly used for high-quality paper pulp production, was thoroughly studied. The results revealed that the lignin content was 13.2% of the total fiber. The analysis of abaca fibers by pyrolysis coupled to gas chromatography-mass spectrometry (Py-GC/MS) released predominantly compounds arising from lignin and p-hydroxycinnamic acids, with high amounts of 4-vinylphenol. The latter compound was demonstrated to arise from p-coumaric acid by pyrolysis of abaca fibers in the presence of tetramethylammonium hydroxide, which released high amounts of p-coumaric acid ( as the methyl derivative). Products from p-hydroxyphenyl (H), guaiacyl (G), and syringyl (S) propanoid units, with a predominance of the latter ( H: G: S molar ratio of 1.5: 1: 4.9), were also released after Py-GC/MS of abaca fibers. Sinapyl and coniferyl acetates, which are thought to be lignin monomer precursors, were also found in abaca. The extractives content of the abaca fiber (0.4%) was low, and the most predominant compounds were free sterols (24% of total extract) and fatty acids ( 24% of total extract). Additionally, significant amounts of steroid ketones (10%), triglycerides (6%), omega-hydroxyfatty acids (6%), monoglycerides (4%), fatty alcohols (4%), and a series of p-hydroxycinnamyl (p-coumaric and ferulic acids) esterified with long chain alcohols and omega-hydroxyfatty acids were also found, together with minor amounts of steroid hydrocarbons, diglycerides, alpha-hydroxyfatty acids, sterol esters, and sterol glycosides.