材料科学
复合材料
差示扫描量热法
热重分析
纤维
热稳定性
极限抗拉强度
弹性模量
傅里叶变换红外光谱
化学工程
天然纤维
热力学
物理
工程类
作者
Ivanei Ferreira Pinheiro,Ana Rita Morales,Lúcia Helena Innocentini Mei
出处
期刊:Cellulose
[Springer Nature]
日期:2014-08-23
卷期号:21 (6): 4381-4391
被引量:38
标识
DOI:10.1007/s10570-014-0387-z
摘要
In this work, polymeric biocomposites of poly (butylene adipate-co-terephthalate), PBAT, were reinforced with Munguba fibers (Pseudobombax munguba). This tree is found in great abundance in the marshy areas of the Amazon forest. The motivation for using this fiber in polymer composites comes from the fact that although research for this fiber has not been reported in the scientific literature, it is commonly used by the local population because its bark is strong and flexible. Most important is that the extraction of Munguba fibers does not damage the supplier tree because as it is extracted from the bark, its regeneration starts as it is removed. The fibers were chemically treated by mercerization/acetylation and evaluated by Fourier transform infrared spectroscopy, thermogravimetric analysis and tensile tests. The Munguba fiber presented mechanical properties similar to those of other natural fibers traditionally used in composites, and the chemical treatment provided improvements of its thermal stability and stiffness. The biocomposites showed a better elastic modulus in relation to the pure PBAT. The addition of fibers caused changes in the T
g, T
m and T
c of PBAT as observed by differential scanning calorimetry analysis. The Russel, Halpin-Tsai and Maxwell models were employed to provide the theoretical elastic modulus of the biocomposites.
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