The effect of chemically coated nanofiber reinforcement on biopolymer based nanocomposites
The effect of chemically coated nanofiber reinforcement on biopolymer based nanocomposites
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化学涂层纳米纤维增强对生物聚合物基纳米复合材料的影响
DOI：
10.15376/biores.2.4.371-388
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发表时间：
2007
期刊：
影响因子：
1.5
通讯作者：
M. Sain
中科院分区：
文献类型：
--
作者：
Bei Wang;M. Sain
这项工作的目的是探索如何各种表面处理将改变分散组分的表面能和酸-碱特性的大麻纳米纤维，使用反相气相色谱法（IGC），并调查这些改性的纳米纤维的掺入到一个生物聚合物基质上的纳米复合材料的性能的影响。以聚乳酸（PLA）和聚羟基丁酸酯（PHB）为基体材料，采用化学机械法对大麻纤维中提取的纤维素纳米纤维进行处理，制备了生物纳米复合材料。纤维素原纤维在表面上具有高密度的-OH基团，其具有与相邻原纤维形成氢键的倾向，从而减少与周围基质的相互作用。有必要通过纤维表面改性来减少原纤的缠结并改善其在基体中的分散性，而不降低其增强能力。IGC结果表明，苯乙烯马来酸酐涂层和乙烯-丙烯酸涂层的纤维提高了它们与酸性和碱性树脂相互作用的潜力。从透射电子显微镜（TEM），它表明，纳米纤维部分分散在聚合物基体中。纳米复合材料的机械性能低于理论计算预测的两种纳米纤维增强的生物聚合物。
The aim of this work was to explore how various surface treatments would change the dispersion component of surface energy and acid-base character of hemp nanofibers, using inverse gas chromatography (IGC), and to investigate the effect of the incorporation of these modified nanofibers into a biopolymer matrix on the properties of their nano-composites. Bio-nanocomposite materials were prepared from poly (lactic acid) (PLA) and polyhydroxybutyrate (PHB) as the matrix, and the cellulose nanofibers extracted from hemp fiber by chemo-mechanical treatments. Cellulose fibrils have a high density of –OH groups on the surface, which have a tendency to form hydrogen bonds with adjacent fibrils, reducing interaction with the surrounding matrix. It is necessary to reduce the entanglement of the fibrils and improve their dispersion in the matrix by surface modification of fibers without deteriorating their reinforcing capability. The IGC results indicated that styrene maleic anhydride coated and ethylene-acrylic acid coated fibers improved their potential to interact with both acidic and basic resins. From transmission electron microscopy (TEM), it was shown that the nanofibers were partially dispersed in the polymer matrix. The mechanical properties of the nanocomposites were lower than those predicted by theoretical calculations for both nanofiber-reinforced biopolymers.
DOI：
10.1007/s00339-003-2225-2
发表时间：
2005-01-01
影响因子：
2.7
作者：
Nakagaito, AN;Yano, H
通讯作者：
Yano, H