| 张 浩,周丰伟,庄洛欣.基于催化乙醇法的毛白杨组分分离及结构研究[J].中国造纸学报,2017,32(4):6-10 |
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| 基于催化乙醇法的毛白杨组分分离及结构研究 |
| Component Separation and Structure Characterization of Poplar Based on Catalyzed-ethanol Pulping |
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| DOI：10.11981/j.issn.1000-6842.2017.04.6 |
| 中文关键词: 催化乙醇法 毛白杨 组分分离 结构表征 |
| Key Words:catalyzed-ethanol pulping poplar component separation structure characterization |
| 基金项目:河南工程学院博士基金(D2015016)；河南省高等学校重点科研项目(15A430019)。 |
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| 中文摘要: |
| 将4-甲基-2-戊酮、二甲基亚砜及甲酸作为催化剂并与乙醇混合后制成催化剂-乙醇体系，研究不同配比的催化剂-乙醇体系对毛白杨组分的分离效果并对分离产物进行结构研究。结果表明，催化剂-乙醇体系分离出的纤维素样品的化学结构和结晶结构得到了完整保留，其α-纤维素含量可达85.2%；木素样品结构中位于δ=152.7处的特征醚键连接在催化剂-乙醇体系的分离过程中被破坏，同时弱酸性环境也会加速愈疮木基的缩合并导致β-O-4结构的降解。 |
| Abstract: |
| The catalyst system containing 4-methyl-2-pentanone, dimethyl sulfoxide and fomic acid was mixed with ethanol to separate the component of poplar based on catalyzed ethanol pulping and the separated products were characterized. The results showed that the chemical and crystal structures of separated cellulose were remained very well and the content of α-cellulose was 85.2%. Compared with the milled wood lignin, the ether bond at 152.7 ppm of separated lignin was damaged. And the weak acidic environment led to guaiacyl condensation and degradation of β-O-4 structure. |
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