碱木质素接枝聚丙烯腈多孔材料的性能表征

doi:10.3969/j.issn.1673-5854.2015.01.003

生物质化学工程 ›› 2015, Vol. 49 ›› Issue (1): 13-19.doi: 10.3969/j.issn.1673-5854.2015.01.003

碱木质素接枝聚丙烯腈多孔材料的性能表征

王慧敏, 马艳丽, 方桂珍, 李淑君

东北林业大学材料科学与工程学院, 黑龙江哈尔滨 150040

收稿日期:2014-09-05 出版日期:2015-01-30 发布日期:2015-02-10
通讯作者: 马艳丽,女,讲师,博士,研究领域:木材化学、生物质复合材料研究;E-mail:myl219@126.com。 E-mail:myl219@126.com
作者简介:王慧敏(1992-),女,黑龙江哈尔滨人,本科,从事林木生物质利用和生物质复合材料的研究工作
基金资助:
中央高校基本科研业务费专项 (DL13CB09); 国家行业公益性科技专项资助 (20120480306)

Properties and Characterization of Alkali Lignin/Poly-acrylonitrile Graft Porous Materials

WANG Hui-min, MA Yan-li, FANG Gui-zhen, LI Shu-jun

College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China

Received:2014-09-05 Online:2015-01-30 Published:2015-02-10

摘要/Abstract

摘要： 在碱木质素与丙烯腈单体接枝共聚过程中分别添加无机模板剂硝酸铵、硝酸铁和氯化钠制备碱木质素接枝聚丙烯腈 (AL-g-PAN)多孔材料。利用SEM、XRD对AL-g-PAN的结构进行表征;以FT-IR对材料的官能团进行分析;以TG-DTG、DSC对AL-g-PAN的热性能进行测定。以硝酸铅为目标污染物,考察了多孔AL-g-PAN对Pb²⁺的吸附性能。结果表明:在25 ℃、Pb²⁺初始浓度为308.5 mg/L、pH值为5的条件下,以硝酸铁为模板剂制备的多孔AL-g-PAN对Pb²⁺平衡吸附量为145.83 mg/g,Pb²⁺去除率为94.5%;该多孔材料成孔均匀、平均孔径在0.913 nm、孔径主要分布在2 nm以下的微孔区域;相同条件下,无模板剂的碱木质素接枝聚丙烯腈对Pb²⁺平衡吸附量仅为28.06 mg/g,其去除率为18.2%。多孔AL-g-PAN的热稳定性较碱木质素明显增强。

关键词: 碱木质素, 丙烯腈, 多孔材料, 吸附

Abstract: The porous materials of alkali lignin graft poly-acrylonitrile (AL-g-PAN) were prepared by employing ammonium nitrate,ferric nitrate,and sodium chloride as templates.The pore structures of AL-g-PAN porous materials were studied with scanning electron microscopy (SEM) and X-ray diffraction (XRD).Functional groups of AL-g-PAN were analysed by infrared spectrometry (IR).Thermal properties were determined by TG-DTG and DSC.With lead nitrate as target pollutant,the adsorption properties of porous AL-g-PAN materials for Pb²⁺were investigated.Results showed that the pore structure of AL-g-PAN porous materials with ferric nitrate as template had significant adsorption performance and homogeneous pore structure with average pore size of 0.913 nm which was mainly distributed near under the size of 2 nm.Its equilibrium adsorption capacity was 145.83 mg/g and the removal rate of Pb²⁺was 94.5% under the conditions of 25 ℃,a pH value of 5,and initial Pb²⁺concentration of 308.5 mg/L.The equilibrium adsorption capacity of AL-g-PAN materials with non-template was 28.06 mg/g and its removal rate was 18.2% as the control sample.Thermal properties of AL-g-PAN porous materials were obviously enhanced compared with those of alkali lignin.Porous AL-g-PAN had possibility to be a Pb²⁺adsorption material with low cost and biodegradable.

Key words: alkali lignin, acrylonitrile, porous material, adsorption

中图分类号:

TQ35
O636.2

王慧敏, 马艳丽, 方桂珍, 李淑君. 碱木质素接枝聚丙烯腈多孔材料的性能表征[J]. 生物质化学工程, 2015, 49(1): 13-19.

WANG Hui-min, MA Yan-li, FANG Gui-zhen, LI Shu-jun. Properties and Characterization of Alkali Lignin/Poly-acrylonitrile Graft Porous Materials[J]. bce, 2015, 49(1): 13-19.

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碱木质素接枝聚丙烯腈多孔材料的性能表征

Properties and Characterization of Alkali Lignin/Poly-acrylonitrile Graft Porous Materials

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