Corncob arabinoxylan for new materials
Corncob arabinoxylan for new materials
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DOI：
10.1016/j.carbpol.2013.11.011
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发表时间：
2014-02-15
影响因子：
11.2
通讯作者：
Labidi, Jalel
中科院分区：
文献类型：
--
作者：
Eguees, Itziar;Stepan, Agnes M.;Labidi, Jalel
以玉米芯农业废弃物为原料制备阿拉伯木聚糖薄膜。制备了三种阿拉伯木聚糖样品：粗提物（CCAX），水洗纯化，漂白纯化。用未经处理的CCAX制备的薄膜是水溶性的，颜色偏黄，力学性能差。纯化后的CCAX的杨氏模量从293 MPa左右提高到1400-1600 MPa左右，强度从9 MPa左右提高到53 MPa左右，而断裂应变保持在8%左右。CCAX洗涤或漂白后，接触角由21.3度左右增加到67-74度。乙酰化后的漂白CCAX具有最高的耐热性（325℃）、低的T-g（125℃）和高的接触角（80°），其膜强度更强（强度约为67 MPa，杨氏模量约为2241 MPa），柔韧性更强（约为13%）。这些特性使纯化的CCAX成为薄膜应用中用作基质的合适材料。(C) 2013 Elsevier Ltd.版权所有。
Corncob agricultural waste was used as a source of arabinoxylan for preparation of films. Three arabinoxylan samples were prepared: crude extract (CCAX), purified by a washing step, and purified by bleaching CCAX. Films prepared with untreated CCAX were water soluble, yellowish in color and had poor mechanical properties. After the purification processes the Young's modulus increased from similar to 293 MPa to similar to 1400-1600 MPa, and strength was improved from similar to 9 MPa to around 53 MPa, while the strain at break was kept at similar to 8% both in untreated and purified CCAX. The contact angle was increased from similar to 21.3 degrees to 67-74 degrees after washing or bleaching CCAX. Acetylation of bleached CCAX showed the highest thermal resistance (325 degrees C), had low T-g (125 degrees C) and a high contact angle (80 degrees), and its films were stronger (strength similar to 67 MPa; Young's modulus similar to 2241 MPa) and more flexible (similar to 13%). These characteristics make purified CCAX a suitable material to be used as a matrix for film applications. (C) 2013 Elsevier Ltd. All rights reserved.