Evaluation of microcrystalline cellulose prepared from kenaf fibers
Evaluation of microcrystalline cellulose prepared from kenaf fibers
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DOI：
10.1016/j.jiec.2010.01.003
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发表时间：
2010-01
影响因子：
6.1
通讯作者：
Dan Wang;Shibin Shang;Zhan‐qian Song;Myoung-ku Lee
中科院分区：
文献类型：
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作者：
Dan Wang;Shibin Shang;Zhan‐qian Song;Myoung-ku Lee
以红麻韧皮和芯的漂白牛皮纸浆为原料制备了一系列微晶纤维素（MCC），并与木浆进行了比较。使用盐酸对三种纸浆进行水解。分别检测了所生产的MCC的性能，如聚合度（DP）、结晶度指数（CrI）、形态特征、堆积密度和振实密度、粒度和粒度分布。所有 MCC 样品均具有高度天然的 I 型结晶纤维素特征。 CrI 值表明，来自红麻芯的 MCC (MCC-C) 比来自红麻韧皮的 MCC (MCC-B) 和来自木浆的 MCC (MCC-W) 更具无定形性。 SEM显微照片显示MCC-B和MCC-W的聚集体呈现棒状形态； MCC-C 似乎是一种集群形式。 MCC-B 具有较高的堆积密度和振实密度，其次是 MCC-W 和 MCC-C。粒径分布规律表明，各种MCC样品均符合对数正态分布，粒径大多位于2~500μm范围内。
A series of microcrystalline cellulose (MCC) were prepared from bleached kraft pulp of kenaf bast and core and compared with that from wood pulp. Hydrolysis of three kinds of pulp was carried out using hydrochloric acid. The properties of the produced MCC such as degree of polymerization (DP), crystallinity index (CrI), morphological features, bulk and tapping density, particle size and particle size distribution were examined, respectively. Highly native crystalline cellulose I form was characterized from all MCC samples. CrI values indicated that MCC from kenaf core (MCC-C) was more amorphous than both MCC from kenaf bast (MCC-B) and MCC from wood pulp (MCC-W). SEM micrographs showed that MCC-B and MCC-W displayed a rod-shaped morphology in their aggregates; MCC-C appeared to be a form of clusters. MCC-B had higher bulk and tapping density followed by MCC-W and MCC-C. The particle size distribution patterns indicated that all kinds of MCC samples fitted log-normal distribution and particle size mostly located in the range of 2–500μm.