| 5％NaOH改性葵花籽皮微观性状研究 |
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| 引用本文： | 陈娟,闫秦生,刘元,张智芳,刘皓.5％NaOH改性葵花籽皮微观性状研究[J].工业催化,2019,27(9):64-67. |
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| 作者姓名： | 陈娟 闫秦生 刘元 张智芳 刘皓 |
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| 作者单位： | 榆林学院化学与化工学院,陕西 榆林719000;陕西省低变质煤洁净利用重点实验室,陕西 榆林719000;国家煤及盐化工产品质量监督检验中心,陕西 榆林,719000 |
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| 基金项目： | 国家自然科学基金项目(21763030); 陕西省教育厅重点实验室科研计划项目(18JS124; 19JS073) |
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| 摘 要： | 采用5%NaOH改性处理葵花籽皮,并用SEM、BET及热重分析等表征改性葵花籽皮的微观性状。结果表明,NaOH将葵花籽皮中易溶基质溶解,粗纤维被分离并变得松散,比表面积较未改性葵花籽皮减少,孔径增加,平均孔径为29.26 nm,主要是粗纤维之间形成的狭长缝形孔。5%NaOH改性葵花籽皮热解主要经历了三个阶段,最主要的失重过程在第二阶段,失重率为61.31%,305℃出现最强失重,失重速率为0.61%·℃~(-1)。
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| 关 键 词： | 精细化学工程 葵花籽皮 氢氧化钠 微观结构 热解 |
Study on microscopic characters of 5% NaOH modified sunflower seed skin |
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| Chen Juan,Yan Qinsheng,Liu Yuan,Zhang Zhifang,Liu Hao.Study on microscopic characters of 5% NaOH modified sunflower seed skin[J].Industrial Catalysis,2019,27(9):64-67. |
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| Authors: | Chen Juan Yan Qinsheng Liu Yuan Zhang Zhifang Liu Hao |
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| Affiliation: | 1.School of Chemistry and Chemical Engineering,Yulin University,Yulin 719000,Shannxi,China;2.Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization,Yulin 719000,Shannxi,China;3.National Coal and Salt Chemical Product Quality Supervision and Inspection Center Yulin 719000,Shannxi,China |
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| Abstract: | Sunflower seed skin was modified by 5%NaOH.The Micro-properties of modified sunflower seed skin were characterized by SEM,BET and thermogravimetric analysis.The results show that NaOH dissolves the soluble matrix in sunflower seed skin,and the crude fibers are separated and loosened.Compared with unmodified sunflower seed skin,the specific surface area decreases and the pore size increases.The average pore size is increased to 29.26 nm,which is mainly slit-like pore formed between crude fibers.The pyrolysis of 5% NaOH modified sunflower seed skin mainly go through three stages.The main weight loss process is in the second stage,the weight loss is 61.31%.The strongest weight loss occurrs at 305 ℃,and the weight loss rate is 0.61%· ℃-1. |
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| Keywords: | fine chemical engineering sunflower seed skin sodium hydroxide microscopic pyrolysis |
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