Mechanical, thermal, and moisture absorption properties of nano-clay reinforced nano-cellulose biocomposites
Mechanical, thermal, and moisture absorption properties of nano-clay reinforced nano-cellulose biocomposites
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DOI：
10.1007/s10570-013-9876-8
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发表时间：
2013-04-01
期刊：
影响因子：
5.7
通讯作者：
Fujii, Toru
中科院分区：
文献类型：
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作者：
Gabr, Mohamed H.;Phong, Nguyen T.;Fujii, Toru
本研究制备了完全环境友好的、可持续的、可生物降解的“绿色”复合材料。制备了一种由不同无机/有机比（m/m）的微纤化纤维素和合成锂皂石粘土组成的新型材料。通过拉伸、弯曲和吸水试验以及动态力学分析对复合材料进行了表征。这些纳米复合材料的形态进行了评价，通过扫描电子显微镜。结果表明，相当大的机械性能的改善，特别是在弹性模量，拉伸强度和弯曲模量与纳米粘土添加到7.5重量%的纳米粘土。在5wt%纳米钙钛矿时，弹性模量显著增加约26%。在7.5wt%纳米粘土下，弯曲模量增加约90%。然而，随着纳米复合材料中粘土负载量的增加，由于过量纳米粘土的团聚，机械性能下降。随着纳米粘土负载量的增加，高温下的储能模量显著增加。
In this research, fully environment-friendly, sustainable and biodegradable 'green' composites were fabricated. A novel material comprised of microfibrillated cellulose and laponite clay with different inorganic/organic ratios (m/m) was prepared. The composites were characterized by tensile, bending and water absorption tests as well as dynamic mechanical analysis. The morphologies of these nanocomposites were evaluated through scanning electron microscopy. Results showed considerable improvement of mechanical properties; specifically in elastic modulus, tensile strength and flexural modulus with the addition of nanoclay up to 7.5 wt% nano-clay. The modulus of elasticity increased significantly by about 26 % at 5 wt% nanocaly. The flexural modulus increased by about 90 % at 7.5 wt% nanoclay. However, with an increased load of clay in the nanocomposite, the mechanical properties decreased due to the agglomeration of excessive nanoclay. The storage modulus was significantly increased at high temperature with increasing the load of nanoclay.