含能材料Issue(6)：752-757,6.DOI:10.11943/j.issn.1006-9941.2014.06.008
硝化剂及预处理条件对软木NC氮量及其分布影响
Effect of Nitration Agents and Soft Wood Treatment on Nitrogen Content and Uniformity of Nitrocellulose
郝红英 1王飞俊 2张云华 2邵自强 2孙君3
作者信息
- 1. 北京科技大学土木与环境工程学院，北京 100083
- 2. 北京理工大学，北京市纤维素及其衍生材料工程技术研究中心，北京100081
- 3. 辽宁庆阳特种化工有限公司，辽宁 辽阳 111002
- 折叠
摘要
Abstract
Nitrocellulose samples(NC)with A,B,C,and D grade were synthesized by nitrating Canadian softwood in HNO3/H2 SO4/H2 O and HNO3/CH2 Cl2 ,respectively. The nitrogen content and nitrogen content distribution( uniformity of nitration)of nitrocellulose were analyzed by a polarizing microscope. Using high-pressure steam explosion technology,soft wood was treated before processing. The effect of steam explosion treatment on the nitrogen content distribution of high nitrogen B and low nitrogen D grade NC was discussed. Results show that the nitrogen content distribution of nitration product from HNO3/CH2Cl2 is more u-niform than that of product from HNO3/H2 SO4/H2 O under the same nitrogen content condition. Uniformities of nitration indica-tors of NC of A,B,C and D grade improve by 16. 9%、17. 5%、16. 8% and 25. 7%,respectively. Steam explosion preprocess can improve nitrogen content and uniformity of product in the same nitrification system because the efficiency of nitration agents diffu-sion to cellulose fiber interior is improved by this treatment,and thus the uniformity for B grade NC can increase by 6. 06% and for D grade NC by 7. 56%.关键词
材料科学/针叶木/硝化纤维素/硝化剂/蒸汽闪爆/氮量分布/溶解度Key words
materials science/softwood/nitrocellulose/nitration agents/steam explosion technology/nitrogen content distribution/solubility分类
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郝红英,王飞俊,张云华,邵自强,孙君..硝化剂及预处理条件对软木NC氮量及其分布影响[J].含能材料,2014,(6):752-757,6.
