| 热处理秸秆的吸湿性等性能变化 |
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| 引用本文： | 李晓燕,陈清松,丁富传,赖寿莲.热处理秸秆的吸湿性等性能变化[J].福建农林大学学报(自然科学版),2016(1):84-88. |
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| 作者姓名： | 李晓燕 陈清松 丁富传 赖寿莲 |
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| 作者单位： | 福建师范大学材料科学与工程学院，福建省高分子材料重点实验室，福建 福州350007 |
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| 基金项目： | 福建省教育厅A类项目(JA13078) |
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| 摘 要： | 对秸秆进行热处理,考察不同热处理温度和热处理时间对秸秆的吸湿率等性能的影响.结果表明:热处理后,秸秆的吸湿率大幅下降.最佳的热处理条件为:200℃,3 h.采用SEM、XRD、FT-IR对热处理前后的秸秆进行表征,发现当热处理温度低于200℃时,秸秆的微观形貌、结晶形态和化学结构均没有发生很大变化,当热处理温度高于250℃,秸秆会发生脆断、结晶度下降、大量脱水等现象,将对秸秆的利用产生不利的影响.
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| 关 键 词： | 秸秆 热处理 吸湿率 结晶度 微观形貌 |
The change of hygroscopicity and other properties of heating-treated straw |
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| Abstract: | In order to increase the stability of composite materials made from straw by reducing the hydroxide radical content of straw, grinded straw was heated and maintained at 150, 180, 200, 250℃ and the hygroscopicity of straw was measured at the 1st, 3nd, 5th hour after being heated. Subsequently, scanning electron microscope ( SEM) , X-Ray diffraction ( XRD) and Fourier trans-lation infrared spectrum ( FT-IR) were used to test the property of heat-treated straw when the hygroscopicity remained unchanged. Results showed that hygroscopicity of straw dropped significantly after being heated. Microstructure, crystallinity and chemical struc-ture of straw almost remained the same when heated under 200℃. When the heating temperature was above 250℃, straw became fractured, over-dehydrated and decreased crystallinity, which posed adverse effect on straw utilization. To summarize, treatment at 200 ℃ for 3 h was the optimum condition. |
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| Keywords: | straw heating-treatment hygroscopicity crystallinity microstructure |
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