THE EFFECTS OF THERMAL MODIFICATION ON THE PROPERTIES OF TWO VIETNAMESE BAMBOO SPECIES, PART I: EFFECTS ON PHYSICAL PROPERTIES

Cong Trung Nguyen, Andre Wagenführ, Le Xuan Phuong, Vu Huy Dai, Martina Bremer, Steffen Fischer

Abstract


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.

Keywords


Bamboo; Thermal modification; Dendrocalamus barbatus; Dendrocalamus asper; Changes in physical properties; Color difference; Mass loss; Equilibrium moisture content

Full Text: PDF

Welcome to BioResources! This online, peer-reviewed journal is devoted to the science and engineering of biomaterials and chemicals from lignocellulosic sources for new end uses and new capabilities. The editors of BioResources would be very happy to assist you during the process of submitting or reviewing articles. Please note that logging in is required in order to submit or review articles. Martin A. Hubbe, (919) 513-3022, hubbe@ncsu.edu; Lucian A. Lucia, (919) 515-7707, lucian.lucia@gmail.com URLs: bioresourcesjournal.com; http://ncsu.edu/bioresources ISSN: 1930-2126