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Study on Surface Wettability and Color of Moso Bamboo (Phyllostachys Pubescens)

Author: HouLingYan
Tutor: AnZhen；ZhaoRongJun
School: Inner Mongolia Agricultural University
Course: Wood Science and Technology
Keywords: Moso bamboo material Chemical composition Wettability Surface color Heat treatment Fourier Transform Infrared Spectroscopy Xenon lamp irradiation
CLC: S781.9
Type: Master's thesis
Year: 2010
Downloads: 88
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Abstract

Moso bamboo material bamboo age as the main object of study, discuss different bamboo age Moso bamboo material chemical composition and heat at the material chemical composition changes; Fourier transform infrared spectroscopy and the bamboo surface chemical composition change. The analysis of a different bamboo age bamboo surface wettability and the color change; using two methods of the the steam medium heat treatment and the xenon lamp irradiation for 4 years old bamboo processing, comparison of different liquids vary in their degree of wetting of the surface and surface color. The main conclusions of this paper is summarized as follows: (1) increase with bamboo age 4 -10 years old, small differences of α-cellulose and lignin content of bamboo; holocellulose content in 4 months to 2 years, students reduce , 2 years old minimum; 2-10 years old, small change. With increase in bamboo age increased the relative content of the the bamboo surface of hemicellulose, lignin relative content differences smaller. The different bamboo TSE bamboo surface hemicellulose relative content increased, the increase of the irradiation time of the xenon lamp, lignin relatively decreased. Heat treatment after the 4-year-old Moso bamboo wood lignin relative content increased relative holocellulose and α-cellulose content decreased. After irradiation of xenon lamp, an increase in the relative content of the hemicellulose of the heat treatment bamboo surface lignin relatively decreased. (2) water at different bamboo age Moso bamboo wood surface of the contact angle different from 4 months to 10 years, students, four bamboo surface contact angle is large, only lower than the four-year raw bamboo, one year students minimum, show that the 1-year raw bamboo Run Moist best 2-year-old bamboo wettability better four bamboo weak wettability, 4 years old bamboo wettability weakest. The size of the contact angle of the 4-year-old bamboo surface before and after heat treatment are: Water gt; formamide gt; diiodomethane. Comparison with untreated bamboo, the contact angle of the the bamboo surface after heat treatment increased the bamboo surface free energy to reduce, reduced surface wettability. The heat treatment temperature than time on the bamboo surface wettability greater impact. (3) with bamboo age increased after xenon lamp irradiation the Moso Bamboo material surface color darkens gradually deepened, the color change is more and more obvious. Bamboo irradiation 1h, compared with non-irradiated bamboo, the difference was not significant. 5h-150h, bamboo lightness gradually reduced. Different Aged Bamboo's overall color difference (△ E *) showed an upward trend in the increase of irradiation time more and more obvious color change, the bamboo surface color from light to dark, and getting darker. Among them, 4-year-old bamboo △ E * largest color change after irradiation most obvious. (4) compared with the untreated bamboo, with the heat treatment temperature and time. 4 years old heat treatment bamboo lightness index L * to reduce the overall color difference △ E * increases, deep heat treatment bamboo ratio still the color increasingly dark. The increase of the irradiation time of the xenon lamp, the heat treatment of bamboo L * increases, the color of the surface thereof by deep-shallow, lit. Different heat treatment conditions, the heat treatment of bamboo with irradiation time prolonged, △ E * showed an increasing trend, obvious color change, but more is not heat-treated bamboo, the overall color difference value is low.

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