端氨基纳米纤维素的制备及对Pb(Ⅱ)的吸附性能研究

doi:10.3969/j.issn.0253-2417.2018.06.002

林产化学与工业 ›› 2018, Vol. 38 ›› Issue (6): 11-19.doi: 10.3969/j.issn.0253-2417.2018.06.002

端氨基纳米纤维素的制备及对Pb(Ⅱ)的吸附性能研究

陈金伟^1,2,4, 商士斌^1,2,3, 沈明贵^1,2,3, 王丹^1,2,3, 付飞^1,2, 蔡照胜⁴

1. 中国林业科学研究院林产化学工业研究所;生物质化学利用国家工程实验室;国家林业局林产化学工程重点开放性实验室;江苏省生物质能源与材料重点实验室, 江苏南京 210042;
2. 南京林业大学江苏省林业资源高效加工利用协同创新中心, 江苏南京 210037;
3. 中国林业科学研究院林业新技术研究所, 北京 100091;
4. 盐城工学院化学化工学院, 江苏盐城 224051

收稿日期:2018-07-13 出版日期:2018-12-25 发布日期:2018-12-27
通讯作者: 王丹,研究员,硕士生导师,研究领域为天然资源化学与利用;E-mail:wgdan@163.com。 E-mail:wgdan@163.com
作者简介:陈金伟(1993-),男,江苏南京人,硕士生,主要从事生物质资源化学与利用研究工作;E-mail:chenjw2020@163.com
基金资助:
“十二五”国家科技支撑计划资助项目（2015BAD14B06）；东莞市院士工作站项目（DGYSZ-2017-294号）

Preparation of Amino Acid-terminated Nanocellulose and Adsorption Properties of Pb(Ⅱ)

CHEN Jinwei^1,2,4, SHANG Shibin^1,2,3, SHEN Minggui^1,2,3, WANG Dan^1,2,3, FU Fei^1,2, CAI Zhaosheng⁴

1. Institute of Chemical Industry of Forest Products, CAF;National Engineering Laboratory for Biomass Chemical Utilization;Key and Open Lab. of Forest Chemical Engineering, SFA;Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China;
2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China;
3. Research Institute of Forestry New Technology, CAF, Beijing 100091, China;
4. School of Chemistry & Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, China

Received:2018-07-13 Online:2018-12-25 Published:2018-12-27

摘要/Abstract

摘要： 以桉木浆为原料，经TEMPO氧化制得羧基化纳米纤维素（CNC）、再经高碘酸钠氧化制得双醛基纳米纤维素（DANC），最后利用二乙烯三胺（DETA）通过席夫碱反应对其进行氨基化改性，得到端氨基纳米纤维素（ANCC）。采用多种方法对纳米纤维素的结构和性能进行了表征，结果表明：DANC含醛基为2.95 mmol/g，ANCC含氨基为1.7 mmol/g，DETA上的氨基成功地接枝到了纳米纤维素链上，使得分子链变长，ANCC的热稳定性提高。ANCC对Pb （Ⅱ）的吸附性能研究表明：室温条件下，当ANCC吸附剂用量为0.1 g，溶液初始质量浓度为400 mg/L且pH值为5.0的条件下吸附3 h，吸附量为210.15 mg/g。吸附过程符合准二级动力学吸附模型和Langmuir等温吸附模型，说明其吸附过程主要为单分子层的化学吸附。

关键词: 桉木浆, 纳米纤维素, 氨基化, 吸附

Abstract: Carboxylated nanocellulose(CNC) was synthesized from eucalyptus pulp by using 2,2,6,6-tetramethylpiperidinyl-1-oxy radical(TEMPO) oxidation, then dialdehyde-based nanocellulose(DANC) was synthesized by sodium periodate oxidation. Finally, the amino modification of DANC was carried out by Schiff base reaction with diethylenetriamine to obtain amino-terminated nanocellulose(ANCC). The structure and properties of nanocellulose were characterized by various methods. The results showed that DANC had an aldehyde group of 2.95 mmol/g and ANCC had an amino group of 1.7 mmol/g. The amino group on DETA was successfully grafted to nanocellulose. In the chain, the molecular chain became longer and the thermal stability of the ANCC improved. The adsorption properties of ANCC on Pb(Ⅱ) showed that, under the conditions of room temperature, dosage of ANCC adsorbent 0.1 g, initial mass concentration of adsorption solution 400 mg/L, pH value 5 and adsorption time 3 h, the adsorption capacity was 210.15 mg/g. The adsorption followed the pseudo second order kinetics equation and Langmiur adsorption isotherm, which indicated that the adsorption process was mainly chemical adsorption of single molecular layer.

Key words: eucalyptus pulp, nanocellulose, aminolation, adsorption

中图分类号:

TQ35

陈金伟, 商士斌, 沈明贵, 王丹, 付飞, 蔡照胜. 端氨基纳米纤维素的制备及对Pb(Ⅱ)的吸附性能研究[J]. 林产化学与工业, 2018, 38(6): 11-19.

CHEN Jinwei, SHANG Shibin, SHEN Minggui, WANG Dan, FU Fei, CAI Zhaosheng. Preparation of Amino Acid-terminated Nanocellulose and Adsorption Properties of Pb(Ⅱ)[J]. Chemistry and Industry of Forest Products, 2018, 38(6): 11-19.

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端氨基纳米纤维素的制备及对Pb(Ⅱ)的吸附性能研究

Preparation of Amino Acid-terminated Nanocellulose and Adsorption Properties of Pb(Ⅱ)

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