矽氧烷改質柳杉之疏水性及熱性質

Hydrophobic Property and Thermal Performance of Siloxane-modified Cryptomeria Japonica

黃金城(Jin-Chelng Huang) ； 林翰謙(Han-Chien Li) ； 吳瑟鏗(She-Keng Wu) ； 阮巽雯(Syun-Wun Ruan) ； 廖芥楓(Chien-Feng Liao)

《林產工業》 23卷3期 (2004/09) Pp. 223-237

摘要

本研究係將柳杉木材以順丁烯二酐酯化，再與丙烯環氧丙醚反應成寡聚酯化木材，最後由寡酯化木材之末端烯與氫矽氧化化合物加成反應成矽氧烷化試材。並藉由FTIR、接觸角儀及TGA等儀器，評估其化學反應、疏水性及熱行為，所得結果歸納如下：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圖譜得知，木材羥基經酯化與寡酯化後在1720 cm^(-1) 出現-CH=CH_2吸收峰，經氫矽氧烷化合物加成反應後，此吸收峰消失，且在1260 cm^(-1)、805 cm^(-1)和760 cm^(-1)發現Si-CH_3的吸收峰，另於840 cm^(-1)出現Si-O-CH_3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，其膨脹率分別為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定性具有改善效益。5. TGA試驗得知，經矽氧烷化邊、心材其焦炭殘留量分別較對照組高8.00%及13.80%，結果顯示矽氧烷化試材可提高其耐燃性。

關鍵字

矽氧烷 ； 柳杉 ； 疏水性 ； 傅立葉轉換紅外線光譜儀（FTIR） ； 熱行為

並列摘要

The plantation species-Taiwan, ROC, Cryptomeria joponica 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 siloxane. The siloxane-modified 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=CH_2 that was disappeared after synthesized with hydro-siloxane compound. The absorbance peaks at 1260, 805 and 760 cm^(-1) were assigned to Si-CH_3 as well as a Si-O-CH_3 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/heart 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 18.1117.7% of control ones. The 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.

並列關鍵字

Siloxane ； Cyptomeria japonica D. Don. ； Hydrophobic Property ； Fourier Transform Infrared Spectroscopy (FTIR) ； Thermal Behavior