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Chemistry and Industry of Forest Products ›› 2018, Vol. 38 ›› Issue (6): 11-19.doi: 10.3969/j.issn.0253-2417.2018.06.002

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

CHEN Jinwei1,2,4, SHANG Shibin1,2,3, SHEN Minggui1,2,3, WANG Dan1,2,3, FU Fei1,2, CAI Zhaosheng4   

  1. 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

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

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