Heat Barrier Properties of Green Composites
Heat Barrier Properties of Green Composites
复制标题
绿色复合材料的热障性能
DOI：
10.1166/jbmb.2012.1234
复制
发表时间：
2012
影响因子：
0.5
通讯作者：
Zhimao Yang
中科院分区：
文献类型：
--
作者：
H. Takagi;Ke Liu;R. Osugi;A. N. Nakagaito;Zhimao Yang
研究了天然纤维增强绿色复合材料的隔热性能。绿色复合材料由环氧树脂和两种天然纤维组成，即蕉麻纤维和竹纤维。天然纤维在复合材料中单向排列，以保持中空的内部微观结构，称为管腔。采用树脂传递模塑法制备了几种不同纤维含量的绿色复合材料试样，并采用稳态法对其导热性能进行了测试。大内腔纤维增强绿色复合材料的导热系数和密度随纤维含量的增加而降低。另一方面，在具有小管腔的竹纤维的情况下，导热率和密度以与玻璃纤维增强塑料（GFRP）类似的方式增加。此外，所有样品的热导率与密度具有良好的相关性;即，热导率与密度成正比。这种独特的纤维含量对热导率的依赖性与天然纤维的管腔尺寸有关。
Thermal insulation characteristics of natural fiber reinforced green composites are examined. The green composites were composed of epoxy resin and two kinds of natural fibers, namely abaca fiber and bamboo fiber. The natural fiber was unidirectionally aligned in the composites in order to preserve the hollow internal microstructure which is called lumen. Several kinds of green composite samples with different fiber contents were fabricated by a resin transfer molding technique and then their thermal conductivity was evaluated by using a steady-state method. The thermal conductivity and density of the green composites reinforced by abaca fiber having large lumen, decrease with increasing fiber content. On the other hand, in the case of bamboo fiber with small lumen, the thermal conductivity and density increase in a similar manner to that of glass fiber reinforced plastics (GFRP). In addition, thermal conductivity of all the samples has a good correlation with density; i.e., the thermal conductivity is proportional to the density. This unique fiber content dependence on thermal conductivity is related to the lumen size of the natural fiber.