从油棕中果皮纤维中分离和表征纤维素纳米晶体
Isolation and Characterization of Cellulose Nanocrystals from Oil Palm Mesocarp Fiber.
作者信息
Chieng Buong Woei, Lee Syn Huey, Ibrahim Nor Azowa, Then Yoon Yee, Loo Yuet Ying
机构信息
Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia.
Materials Processing and Technology Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia.
出版信息
Polymers (Basel). 2017 Aug 11;9(8):355. doi: 10.3390/polym9080355.
The aim was to explore the utilization of oil palm mesocarp fiber (OPMF) as a source for the production of cellulose nanocrystals (CNC). OPMF was first treated with alkali and then bleached before the production of CNC by acid hydrolysis (H₂SO₄). The produced materials were characterized using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA), a scanning electron microscope (SEM) and a transmission electron microscope (TEM). It was proven that acid hydrolysis can increase the crystallinity of bleached OPMF and reduce the dimension of cellulose to nano scale. Changes in the peaks of the FTIR spectrum at 2852 (C-H stretching), 1732 (C=O stretching) and 1234 cm (C-O stretching) indicated that the alkali treatment completely removed hemicelluloses and lignin from the fiber surface. This can be seen from the thermogram obtained from the TGA characterization. Morphological characterization clearly showed the formation of rod-shaped CNCs. The promising results prove that OPMF is a valuable source for the production of CNC.
目的是探索将油棕中果皮纤维（OPMF）用作生产纤维素纳米晶体（CNC）的原料。在通过酸水解（H₂SO₄）生产CNC之前，先对OPMF进行碱处理，然后进行漂白。使用傅里叶变换红外（FTIR）光谱、X射线衍射（XRD）、热重分析（TGA）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对所制备的材料进行表征。结果表明，酸水解可提高漂白后OPMF的结晶度，并将纤维素尺寸减小至纳米级。FTIR光谱中2852（C-H伸缩振动）、1732（C=O伸缩振动）和1234 cm（C-O伸缩振动）处峰的变化表明，碱处理完全去除了纤维表面的半纤维素和木质素。这可从TGA表征得到的热重曲线看出。形态表征清楚地显示出棒状CNC的形成。这些有前景的结果证明，OPMF是生产CNC的宝贵原料。
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