麻六甲合歡及杉木木材之苯甲氯化學改質處理

本研究乃利用苯甲氯對木材進行化學改質，藉由苯甲基取代木材羥基上之氫，期藉此賦予木材熱可塑性。研究中以麻六甲合歡及杉木為改質處理材，並藉由其重量增加率、熱示差掃描卡量分析(DSC)、熔融觀測及紅外線光譜分析(FTIR)等探討其化學改質材之性質。木材進行化學改質處理時，隨處理時間延長或處理溫度提高，苯甲基化改質處理材之重量增加率增加，且處理溫度對改質效果之影響大於處理時間。未經化學改質之木材在加熱過程中無熱熔融現象發生，苯甲基化改質處理材則在加熱過程中會出現熱熔融現象，且熔融發生溫度隨改質處理材之重量增加率提高而降低。DSC熱分析圖無法明確顯示苯甲基化改質處理材之熱軟化現象，然FTIR光譜分析則顯示經改質處理後之木材結構中導入了苯甲基之特性吸收峰，且其強度隨苯甲基化程度增加而愈提高。

關鍵字

化學改質；苯甲基化木材；熱可塑性

並列摘要

Woods of Malacca albizzia (Albizzia falcataria) and China fir (Cunninghamia lanceolata) were chemically modified with benzyl chloride. The thermoplasticity of beazylated wood expected as the benzyl group was substituted for the hydrogen of hydroxyl group of wood component. Properties of chemically modified woods were investigated by weight percent gain, differential scanning calorimetry (DSC), melting measurement and FTIR analysis. Comparing with various chemical modification conditions, the benzylated woods treated with longer time or higher temperature would have higher weight percent gain. The influence of treatment temperature on the modification effectiveness was higher than the treatment time. Beazylated woods would melt under heating process, and the melting temperature decreased with the increasing of weight percent gain. But the untreated wood would not melt at the process of heating. DSC thermal analysis could not be used to show the thermal softening properties of benzylated wood. FT-IR spectra showed that the benzyl group had been introduced into the wood structure of beazylated wood, and the more degree of benzylating the higher intensity of the characteristic absorption would be.

並列關鍵字

Beazylated wood ； Chemical modification ； Thermoplasticity

國際替代計量

麻六甲合歡及杉木木材之苯甲氯化學改質處理

全文下載

主題瀏覽