Effects of Pretreatments on Surface Properties of Bamboo

• Main Authors: Ssu Yuan Fan, 范思源
• Other Authors: Kun Tsung Lu
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/06610427730553523861

碩士 === 國立中興大學 === 森林學系 === 92 === The poor adhesion of film on bamboo is criticized by the bamboo industry. To develop some suitable pretreated methods that improve the adhesion of film and that the bamboo industry is motivated to explore potential applications, and subsequently increase the economic value of bamboo products, four kinds of the simplest and cheapest pretreated methods including sanding, alkali, heating, and UV irradiated treatments were examined in this study. Five-year old moso bamboo（Phyllostachys pubescens （Carr.）A. and C. Riv.）, and ma bamboo （Dendrocalamus latiflorus Munro）, nitrocellulose lacquer（NC lacquer） and waterborne polyurethane coating（PU）were used. Surface properties of bamboo such as roughness, wettability, color, FT-IR analysis and SEM inspection were evaluated. Three different test, namely 180° peel strength, shear strength, and cross-cut tests, were performed to measure the adhesion of films on coated bamboo surface. The best conditions each pretreatment, obtained the greatest adhesion of coatings are summarized follows: The best adhesion of NC lacquer film on moso bamboo surface using #120→#320 two stage sanding treatment, and on ma bamboo treated with #120→#400 were obtained; while, for the waterborne PU film, the moso bamboo with #120 single stage sanding treatment, and ma bamboo treated with #120→#400 had the best one. The alkali treatment of 1% Na2CO3 solution at 70 ℃ and soaked for 20 min, had the best adhesion of NC lacquer films for both moso bamboo and ma bamboo; but, for the waterborne PU film, the alkali solution using 1% NaOH and at the same temperature and soaked time had the best adhesion for both bamboo. On the heating treatment, the best adhesion of both NC lacquer and waterborne PU films on the bamboo could be obtained with treated at 125 ℃ for 15 min on moso bamboo and for 10 min on ma bamboo. For the UV irradiated treatment, using UV lamp which combined mercury lamp (H lamp) with metal halide lamp (M lamp), with the intensity of 100 W / cm, and exposured time 15 sec, obtained the best adhesion of NC lacquer on both of the bamboo. However, the adhesion of the PU film on the both bamboo surface exposured on H lamp had the best one.