- 期刊
多元醇液化杉木在聚胺酯發泡體製造之應用
Application of Polyhydric Alcohol Liquefied China Fir in the Manufacturing of Polyurethane Foams
摘要
本研究以不同分子量之聚乙二醇（PEG）為溶劑（PEG-200、400、600、1000）對杉木（Cunninghamia lanceolata; China fir）行液化處理，探討液化杉木與異氰酸酯（PMDI）反應時，液化杉木性質及NCO/(OH+COOH) 莫爾比對所製造PU發泡體性質之影響。由其結果得知，以PEG-400為液化藥劑者有較佳之液化效果，其殘渣率較低，以PEG-1000液化者效果較差，其液化木材有較高的酸價及羥價。木材液化條件會影響其所製造PU發泡體之性質，PEG分子量較低者所製造之PU發泡體比重較高，孔隙較密緻，但較柔軟具彈性，浸水時之單位體積最大吸水量較高，但重量損失率較大，耐溶劑性較低。而PEG分子量較大者所製造之PU發泡體比重較低，孔隙較粗大，但性質較硬脆而缺乏彈性，浸水時單位體積最大吸水量較低，重量損失率較小，耐溶劑性較高。液化木材之丙三醇含量較高時，其PU發泡體之壓縮強度較大，但拉伸強度較低。提高NCO/(OH+COOH) 莫爾比會增加PU發泡體之剛性，降低浸水時之單位體積最大吸水量及重量損失率，並增加耐溶劑性。
並列摘要
The China fir (Cunninghamia lanceolata) was liquefied with various molecular weight polyethlyene glycol, i.e. PEG-200, 400, 600 and 1000. The effects of the properties of liquefied wood and the molar ratio of NCO/(OH+COOH) on the properties of PU foam were investigated. PEG-400 showed best liquefaction effect; its liquefied wood had lower residue. While PEG-1000 had worst liquefaction effect; its liquefied wood had higher acid value and hydroxy value. Wood liquefaction condition would influence the properties of PU foam. PU foams made from liquefied wood with lower PEG molecular weight had higher specific gravity and finer and denser pores. These foams had softer and more elastic properties and had higher water adsorption per unit volume but with much more weight loss when soak-ing in water. On the contrary, PU foams made from liquefied wood with higher PEG molecular weights had lower specific gravity with greater porosity, more hardness and less elasticity. They had lower water adsorption per unit volume and with much less weight loss when soaking in water, but had better solvent resistance. Increased the amount of glycerol in liquefied wood could increase the compression strength of PU foams, but decrease the tensile strength. Increased the molar ratio of NCO/(OH+COOH) would raise the stiffness of PU foam and solvent resistance, and would reduce the water adsorption per unit volume and weight loss when soaking in water.
延伸閱讀
- 李文昭、張嘉方（2004）。多元醇液化相思樹在聚胺基甲酸酯發泡體製造之應用。林產工業，23(3)，239-248。https://doi.org/10.6561/FPI.2004.23(3).6
- 阮幼梅、李文昭（2018）。液化柳杉為原料製作回彈性聚胺基甲酸酯發泡體之性質。林產工業，37(1)，47-56。https://doi.org/10.6561/FPI.201803_37(1).0005
- 鄭彥宇、張國峻、李文昭（2009）。多元醇液化柳杉製備聚胺基甲酸酯樹脂塗料。林業研究季刊，31(3)，69-77。https://doi.org/10.29898/SHBQ.200909.0006
- 張哲維、阮巽雯、劉素玲、黃金城（2011）。多元醇液化柳杉應用於輕質發泡水泥板之製造。林產工業，30(4)，221-230。https://www.airitilibrary.com/Article/Detail?DocID=02546523-201112-201503120006-201503120006-221-230
- 林士傑、林宣樂、李清庭（2003）。Fabrication of Poly-Si by Using Metal Induce Crystallization Method。真空科技，16(3)，13-18。https://doi.org/10.29808/JVSROC.200301.0003