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頁籤選單縮合
題名 | 矽氧烷改質柳杉之疏水性及熱性質=Hydrophobic Property and Thermal Performance of Siloxane-modified Cryptomeria joponica |
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作者 | 黃金城; 林翰謙; 吳瑟鏗; 阮巽雯; 廖芥楓; | 書刊名 | 林產工業 |
卷期 | 23:3 2004.09[民93.09] |
頁次 | 頁223-237 |
分類號 | 474.1 |
關鍵詞 | 矽氧烷; 柳杉; 疏水性; 傅立葉轉換紅外線光譜儀; 熱行為; Siloxane; Cryptomeria joponica D. Don.; Hydrophobic property; Fourier transform infrared spectroscopy; FTIR; Thermal behavior; |
語文 | 中文(Chinese) |
中文摘要 | 1.經改質後試材之重量增加率為41%,但心邊材沒有差別。 2.FTIR圖得知,木材羥基經酯化與寡酯化後在1720cm-1出現-CH=CH2吸收峰,經氫矽氧烷化合物加成反應後,此吸收峰消失,且在1260cm-1、805cm-1和760cm-1發現Si-CH3的吸收峰,另於840cm-1出現Si-OCH3的吸收峰,由此可知木材已完成矽氧烷化。 3.經矽氧烷化之邊、心材之接觸角顯示其具有非常良好的疏水性。 4.膨脹率與吸水率而言,經矽氧烷改質之邊心材,其脹率分別為5.65%及5.71%,僅為對照組者之48.1%及60.0%,在吸收率則為23.26%及26.99%,僅為對照組者之18.1%及17.7%,結果顯示矽氧烷化試材對尺寸安全性具有改善效益。 5.TGA試驗得知,經矽氧烷化邊、心材其焦炭殘留量分吸較對照組高8.00%及13.80%,結果顯示矽氧烷化試材可提高其耐燃性。 |
英文摘要 | The plantation species-Taiwan, ROC, Cryptomeria japonica D. Don. (Japanese cedar) was chemically modified with Maleic anhydride esterify, Allyl Glycidyl Ether (AGE) reaction as an oligoesterified wood and finally a terminal alkenes grafted with siloxame. The siloxane-modifed woods were examined with the apparatus of FTIR, face contact-angle meter and TGA to evaluate degree of terminal-grafted, hydrophobic property, and thermal behavior. The results obtained are summarized as follow: 1. The modified woods increased their percent weight about 41%, but the difference was insignificantly for sap/heartwood. 2. From FTIR spectra, the esterified/oligoesterified wood assigned to –CH=CH2 that was disappeared after synthesized with hydro-siloxane compound. The absorbance peaks at 1260, 805 and 760 cm-1 were assigned to Si-CH3 as well as a Si-O-CH3 at 840 cm-1. As these results, the modified woods have already grafted with siloxane. 3. The contact angle of the siloxane-modified sap/heart woods showed hydrophobic property than that of control ones. 4. For the expansibility and the percent absorption of the siloxane-modified sap/hart woods, the expansibility was 5.65/5.71% that was only 48.1/60.0% of control ones. The percent absorption was 25.26/26.99% that was only 18.1/17.7% of control ones. These results indicated that the siloxane-modified woods were effective to improve their dimensional stability. 5. From the tests of TGA the char of the siloxane-modified sap/heart woods was higher than control ones about 8.00/13.80%. It is indicated that the siloxane-modified woods enable to advance the fire-retardant performance. |
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