摘要
以红麻杆为原料,经250℃-500℃热解,制备出了选择性亲油和高吸油量的吸油材料。利用元素分析、红外光谱分析和扫描电镜等手段,研究了红麻杆热解过程中高吸油性能的形成机制。结果表明,随着热处理温度的升高,试样中碳含量逐步升高,氧含量逐步降低。吸油性能的变化与苯-乙醇、热水和1%NaOH抽出物含量的变化呈对应关系。FTIR分析表明,热解处理后,-OH的红外吸收明显减少,亲油的芳香环结构的吸收显著增加。SEM观察表明,300℃热解物中大容量的孔结构和毛细管作用是其具有大的吸油容量和对油产生快速的吸附作用的主要原因。
Pyrolyzing the kenaf cores at 250℃-500 ℃ directly, a new kind of absorbent with superior selectivity and high sorption capacity to oil was obtained. By analysis of elemental composition, extract content, FTIR spectrum and SEM, the formation mechanism of high oil absorption characteristic was studied. The result showed, as the heat treatment temperature rose, the content of carbon increased, while the oxygen content came down. The sorption characteristic has correlation on the content of extracts of benzene-ethanol, boiled water and 1% NaOH. The FTIR analysis showed, by pyrolysis, the infrared absorption of hydroxyl was weakened distinctly, oppositely, the absorption of the lipophilic aromatic ring was enhanced. The SEM indicated that the absorbent pyrolyzed at 300℃ got a macropore structure and abroad sorption volume, and the oil could be rapidly absorbed by capillary action.
出处
《中国麻业科学》
2009年第2期143-147,共5页
Plant Fiber Sciences in China
基金
福建省自然科学基金项目(2006J0247)
农业部948项目(2006-G18(B))
关键词
红麻杆
热解物
吸油量
吸油选择性
机理
kenaf cores
pyrolysate
oil-absorption capacity
absorbing selectivity
mechanism
