端氨基超支化聚合物接枝双醛基纳米纤维素的制备及其对Ni2+的吸附

doi:10.3969/j.issn.0253-2417.2019.04.003

林产化学与工业 ›› 2019, Vol. 39 ›› Issue (4): 18-26.doi: 10.3969/j.issn.0253-2417.2019.04.003

端氨基超支化聚合物接枝双醛基纳米纤维素的制备及其对Ni²⁺的吸附

陈金伟^1,²(),王丹^2,³,商士斌^2,³,刘鹤^2,³,蔡照胜^1,*()

1. 盐城工学院化学化工学院, 江苏盐城 224051
2. 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; 国家林业和草原局林产化学工程重点实验室; 江苏省生物质能源与材料重点实验室, 江苏南京 210042
3. 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

收稿日期:2019-04-18 出版日期:2019-08-25 发布日期:2019-08-23
通讯作者: 蔡照胜 E-mail:chenjw2020@163.com;jsyc_czs@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:
中国林业科学研究院基本科研业务费专项资金青年人才项目(CAFYBB2017QB007);东莞市院士工作站项目(DGYSZ-2017-294)

Preparation of Amino-terminated Hyperbranched Polymer Grafted Dialdehyde-based Nanocellulose and Its Adsorption Properties of Ni²⁺

Jinwei CHEN^1,²(),Dan WANG^2,³,Shibin SHANG^2,³,He LIU^2,³,Zhaosheng CAI^1,*()

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

Received:2019-04-18 Online:2019-08-25 Published:2019-08-23
Contact: Zhaosheng CAI E-mail:chenjw2020@163.com;jsyc_czs@163.com
Supported by:
中国林业科学研究院基本科研业务费专项资金青年人才项目(CAFYBB2017QB007);东莞市院士工作站项目(DGYSZ-2017-294)

摘要/Abstract

摘要：

通过聚合反应制得一种端氨基超支化聚合物（HBP-NH₂），并以桉木浆为原料，经超声波辅助-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（DNC），最后利用HBP-NH₂对DNC进行氨基化改性，得到端氨基超支化聚合物接枝双醛基纳米纤维素（HBPN-DNC），并对反应条件进行优化，当10%的HBP-NH₂溶液加入量为10 mL，反应温度为70℃，反应时间为4 h时N元素质量分数最高，达到6.0%。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：氨基成功地接枝到了纳米纤维素链上，使得分子链变长，HBPN-DNC的热稳定性提高。HBPN-DNC对Ni（Ⅱ）的吸附性能研究表明：室温条件下，当HBPN-DNC吸附剂用量为0.1 g，溶液初始质量浓度为500 mg/L且pH值为5.0的条件下吸附3 h，吸附量为150.21 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:

Amino-terminal hyperbranchedpolymer(HBP-NH₂) was synthesized by polycondensation.Carboxylatednanocellulose(CNC) was prepared from eucalyptus pulp by using ultrasonic assisted 2, 2, 6, 6-tetramethylpiperidinyl-1-oxy (TEMPO)radical oxidation, and dialdehyde-based nanocellulose(DNC) was further obtained by sodium periodate oxidation of CNC. Finally, the amino-terminated hyperbranched polymer grafted dialdehyde-basednanocellulosematerial(HBPN-DNC) was prepared by amination modification of DNC with HBP-NH₂. The reaction conditions were optimized. When the addition of 10% HBP-NH₂ solution was 10 mL, the reaction temperature was 70℃, and the reaction time was 4 h, the N element mass fraction reached the highest, 6.0%. The structure and properties of nanocellulose were characterized by various methods. The results showed that the amino group was successfully graftedonto DNC. The molecular chain became longer and the thermal stability of the HBPN-DNC improved.The adsorption properties of Ni²⁺ on HBPN-DNC showed that, under the conditions of room temperature, 0.1 g of HBPN-DNC adsorbent, initial mass concentration of adsorption solution of 500 mg/L, pH value of 5 and adsorption time of 3 h, the adsorption capacity was 150.21 mg/g. The adsorptionfollowed the pseudo second order kineticsequation 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,王丹,商士斌,刘鹤,蔡照胜. 端氨基超支化聚合物接枝双醛基纳米纤维素的制备及其对Ni²⁺的吸附[J]. 林产化学与工业, 2019, 39(4): 18-26.

Jinwei CHEN,Dan WANG,Shibin SHANG,He LIU,Zhaosheng CAI. Preparation of Amino-terminated Hyperbranched Polymer Grafted Dialdehyde-based Nanocellulose and Its Adsorption Properties of Ni²⁺[J]. Chemistry and Industry of Forest Products, 2019, 39(4): 18-26.

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样品samples	C	H	O	N	S
CNC	36.28	5.18	58.54	0	0
DNC	36.08	5.14	58.78	0	0
HBPN-DNC	43.02	6.77	44.21	6.00	0

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端氨基超支化聚合物接枝双醛基纳米纤维素的制备及其对Ni²⁺的吸附

Preparation of Amino-terminated Hyperbranched Polymer Grafted Dialdehyde-based Nanocellulose and Its Adsorption Properties of Ni²⁺

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