THE EFFECTS OF THERMAL MODIFICATION ON THE PROPERTIES OF TWO VIETNAMESE BAMBOO SPECIES, PART I: EFFECTS ON PHYSICAL PROPERTIES
THE EFFECTS OF THERMAL MODIFICATION ON THE PROPERTIES OF TWO VIETNAMESE BAMBOO SPECIES, PART I: EFFECTS ON PHYSICAL PROPERTIES
复制标题
DOI：
10.15376/biores.7.4.5355-5366
复制
发表时间：
2012-09
期刊：
影响因子：
1.5
通讯作者：
Cong Trung Nguyen;A. Wagenführ;L. X. Phuong;V. Dai;M. Bremer;S. Fischer
中科院分区：
文献类型：
--
作者：
Cong Trung Nguyen;A. Wagenführ;L. X. Phuong;V. Dai;M. Bremer;S. Fischer
竹子是一种非常有趣的生物资源，可用作建筑材料，因为它的强度与低密度相结合。然而，它对真菌和昆虫的敏感性对其使用是有问题的。越南使用热改性来提高竹子的耐久性和尺寸稳定性。热改性引起了许多与竹子物理性质有关的变化，例如，质量、颜色和平衡水分含量（EMC）。所有这些变化取决于改性条件（改性温度和持续时间）。质量损失（ML）、色差（ΔE*ab）和EMC的降低（ΔEMC）是由于热改性随着温度的升高和/或持续时间的延长而增加。因此，温度比改性时间的影响更大。在130 °C时变化轻微（ML：0.3...0.6%; ΔE*ab：3.5; ΔEMC：0.5...0.8%），180 °C时中等（ML：1,5...4%; ΔE*ab：21.37; ΔEMC：3.6...4.4%），但在220 °C下非常强（ML：14.16%; ΔE*ab：46.51; ΔEMC：5.6...5.7%）。上述变化之间有着密切的联系。
Bamboo is a very interesting bioresource for use as a building material because of its properties of strength in combination with low density. However, its susceptibility to fungi and insects is problematic for its usage. Thermal modification is used in Vietnam to improve the durability and dimensional stability of bamboo. The thermal modification causes many changes related to the physical properties of bamboo, e.g., mass, color, and equilibrium moisture content (EMC). All these changes are dependent on the modification conditions (modification temperature and duration). The mass loss (ML), the color difference (ΔE*ab), and the reduction of EMC (ΔEMC) were due to the thermal modification increase with higher temperature and/or longer duration. Therefore the temperature had greater influence than the modification duration. The changes were slight at 130 °C (ML: 0.3…0.6 %; ΔE*ab: 3…5; ΔEMC: 0.5…0.8 % ), moderate at 180 °C (ML: 1,5…4 %; ΔE*ab: 21…37; ΔEMC: 3.6…4.4 %), but very strong at 220 °C (ML: 14…16 %; ΔE*ab: 46…51; ΔEMC: 5.6…5.7%). There are close correlations between the changes mentioned above.