醇溶性保綠藥劑處理對桂竹竹青綠色堅牢度之影響

桂竹經由毒性較低的醇溶性保綠藥劑處理後，可以獲得良好的保綠效果，為了探討硝酸銅與氯化銅二種醇溶性保綠藥劑處理條件對桂竹竹青綠色堅牢度的影響，本試驗利用人工加速耐光試驗及室內與室外的實際曝露試驗評估此類型藥劑處理後桂竹竹青的綠色堅牢度。試驗結果顯示，經過32天加速耐光試驗後，不同的藥劑種類、濃度、溶劑種類及加熱方式對桂竹的綠色堅牢度並無顯著差異。綜合各種處理條件的結果顯示，當桂竹浸漬於2%氯化銅甲醇溶液，在60 ℃下水浴加熱處理2 hr後，可獲較佳的綠色堅牢度。此外，處理材於室外曝露8星期後，表面皆不具綠色效果，表示竹材使用於室外，綠色堅牢度不佳；而室內放置6個月後的保綠處理材，表面仍維持亮麗的綠色，顯示醇溶性保綠處理材具有良好的室內堅牢度。

關鍵字

保綠；桂竹；綠色堅牢度；人工加速耐光試驗；室內曝露；耐候試驗；氯化銅；硝酸銅

並列摘要

Makino bamboo (Phyllostachys makinoi Hayata) treated with low toxic alcohol-borne reagent could preserve the green color of culms. To evaluate the effects of various treatment conditions of copper chloride and copper nitrate on the green color fastness of makino bamboo, artificially accelerated lightfastness test and two exposure tests including an indoor exposure and an outdoor weathering were employed in this study. After exposure to artificially accelerated lightfastness test for 32 days, it revealed that treatment conditions such as different protectors, concentrations, solvent types and heating methods did not affect the green color fastness of treated makino bamboo culms. Results also demonstrated that the best green color fastness of makino bamboo culms was obtained by heating them in 2% CuCl2 methanolic solution with a water-bath heating at 60°C for 2 hr. The green color on the treated bamboo epidermis faded readily after exposure to the outdoors for 8 weeks. However, comparing with the severe color variations of untreated bamboo (Δa*=11.5), the a* value of treated bamboo remained nearly the same after indoor exposure for 6 months, indicating the specimens exhibited an excellent green color fastness when exposed to the indoors.

並列關鍵字

Green color protection ； Makino bamboo ； Green color fastness ； Accelerated lightfastness test ； Indoor exposure ； Outdoor weathering ； Copper chloride ； Copper nitrate

國際替代計量

醇溶性保綠藥劑處理對桂竹竹青綠色堅牢度之影響

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