Weathering characteristics of bamboo (Phyllostachys puberscence) exposed to outdoors for one year

Abstract

The 1-3-year-old bamboo (Phyllostachys puberscence) culms were exposed to ambient weathering conditions for 12 months. Changes in color, surface topography, and chemical features of bamboo culms by weathering were investigated. Changes in the surface color of culms increased sharply in the first 3 months weathering and then slowly decreased compared to control culms. Surface checks developed more markedly in the 2-and 3-year-old bamboos than in the 1-year-old ones. The depth of erosion was extended up to 150 lm from the outer surface of culms. Solid-state NMR (nuclear magnetic resonance) and FT-IR (Fourier transform infra-red) spectra showed that the lignin and hemicelluloses of bamboo culms were preferentially affected by natural weathering, while crystalline cellulose remained relatively intact.

Photostabilizing Efficiency of Acrylic-based Bamboo Exterior Coatings Combining Benzotriazole and Zinc Oxide Nanoparticles

“…In addition, this degradation causes cracks in the cells' walls [3], considerably affects lignin and hemicelluloses [4], and gradually decreases the mechanical properties of bamboo [5]. Ultraviolet (UV) light has a short wavelength, and its energy is high enough to cleave many critical functional groups and linkages in bamboo components (e.g., lignin, cellulose, and hemicellulose) [6].…”

Bio-based Building Skin

“…Typically, normal variations in temperature do not significantly affect bio-based materials as they are accustomed to changing environmental conditions. However, if materials originate from climatic conditions that differ from the building location climate (e.g., when bamboo is used in a temperate climate), materials should be carefully studied to discover all potential incompatibilities (Kim et al 2016). Water-absorbing elements (if present) can be prone to destruction from frost, as the frozen water-ice-expands.…”

Environmental effects of ozone depletion and its interactions with climate change: Progress report, 2016

“…These changes are more pronounced during initial stages of exposure 358 -360 and are localised in a thin surface layer of wood 360 and bamboo. 361 The fractional crystallinity of cellulose in bamboo increases during photodegradation as the amorphous cellulose fraction is preferentially degraded. 361 Monitoring the progress of the photooxidative reactions is critical in the development of protective coatings for wood.…”

“…361 The fractional crystallinity of cellulose in bamboo increases during photodegradation as the amorphous cellulose fraction is preferentially degraded. 361 Monitoring the progress of the photooxidative reactions is critical in the development of protective coatings for wood. 362 However, the spectroscopic methods used are tedious.…”