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Chemistry and Industry of Forest Products ›› 2019, Vol. 39 ›› Issue (4): 18-26.doi: 10.3969/j.issn.0253-2417.2019.04.003

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

Jinwei CHEN1,2(),Dan WANG2,3,Shibin SHANG2,3,He LIU2,3,Zhaosheng CAI1,*()   

  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:


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

CLC Number: