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題名 | 液化長枝竹為基質圓球狀酚醛樹脂製作碳化材之性質=Properties of Carbonized Materials Prepared from Liquefied Bambusa dolichoclada-based Spherical Phenol-Formaldehyde Resins |
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作者 | 尤昭云; 張國峻; 林睿晨; 李文昭; Yu, Chao-yun; Chang, Kuo-chun; Lin, Ruei-chen; Lee, Wen-jau; |
期刊 | 林產工業 |
出版日期 | 20161200 |
卷期 | 35:4 2016.12[民105.12] |
頁次 | 頁213-219 |
分類號 | 467.4 |
語文 | chi |
關鍵詞 | 長枝竹; 碳化材; 酚醛樹脂; 酚液化竹材; 圓球形樹脂; Bambusa dolichoclada; Carbonized materials; Phenol-formaldehyde resins; Phenol-liquefied bamboo; Spherical resins; |
中文摘要 | 本研究將長枝竹(Bambusa dolichoclada Hayata;Long-shoot bamboo)以酚為溶劑,硫酸為催化劑,在液化溶劑/竹粉重量比3/1 條件下以130℃加熱60 min 進行液化處理。隨後將酚液化竹材與福馬林在弱鹼性環境下,以聚乙烯醇(Polyvinyl alcohol;PVA)為安定劑,六甲基四胺為架橋硬化劑,藉由懸浮聚合法製作圓球形酚醛樹脂(Phenol-formaldehyde resin;PF)顆粒。並將所得PF 樹脂顆粒於氮氣環境下,以10℃/min 之升溫速率加熱至800℃,並持溫1 h 進行碳化處理。由結果得知,碳化後樹脂顆粒可保持圓球狀,但其重量及粒徑減小。BET 等溫氮氣吸脫附分析結果得知,碳化圓球形PF 樹脂內部孔隙以孔徑小於1 nm 之微孔為主,其吸附曲線為IUPAC 分類 Type I 型,顯示其吸附作用主要為單分子層吸附。不同條件比較,其中以PVA 添加量3%,F/P 莫耳比3.0 所製作之圓球形PF 樹脂之碳化材有最大之吸附體積、比表面積及總孔隙體積。 |
英文摘要 | Bambusa dolichoclada Hayata (Long-shoot bamboo) was liquefied in phenol with H_2SO_4 as a catalyst. The liquefied process was conducted with the weight ratio of liquefied solvent to bamboo powder as 3/1 at 130℃ for 60 min. The spherical phenol-formaldehyde resin (PF) beads were prepared from phenol liquefied bamboo and formalin under weak alkaline condition by a suspension polymerization process. For which, polyvinyl alcohol (PVA) and hexamethylenetetramine were used as the stabilizer and cross-linking hardener, respectively. The PF resin beads were heated to 800℃ with a heating rate of 10℃/min under nitrogen environment and maintained at 800℃ for one hour to undergo the carbonization. The results showed that resin beads could maintain the spherical appearance after carbonization. However, their weight and dimension reduced. The BET isothermal nitrogen adsorption/desorption analysis showed that the main pores in the carbonized spherical PF beads were microporous with the diameter lower than 1 nm. The adsorption/desorption curves fitted the Type I of the IUPAC classification, indicating the predominant adsorption was the monomolecular layer adsorption. Comparison between the different conditions, carbon materials made from spherical PF beads which were prepared with 3% of PVA and 3.0 of the F/P molar ratio had the largest adsorption volume, specific surface area and total pore volume. |
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