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Chemistry and Industry of Forest Products ›› 2019, Vol. 39 ›› Issue (2): 67-72.doi: 10.3969/j.issn.0253-2417.2019.02.010

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Preparation and Performance Characterization of Sodium Alginate/Cellulose Composite Microspheres

Yanqing LI,Zhiming LIU*(),Xiaokai CHENG,Mengnan CAO,Jianan WANG   

  1. College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
  • Received:2018-09-14 Online:2019-04-25 Published:2019-05-08
  • Contact: Zhiming LIU E-mail:zhimingliuwhy@126.com
  • Supported by:


The cellulose solutions were prepared with the cotton linter pulp dissolved in NaOH/urea aqueous system at low temperature and mixed with sodium alginate for the preparation of sodium alginate/cellulose composite micropheres(SACCM) by sol-gel transition. Then a series of SACCM, which could be preserved in water phase, were prepared by turning the ratio of cellulose and sodium alginate. The structure and properties of the microspheres were characterized by scanning electron microscopy(SEM), Fourier transform infrared spectrometer(FT-IR) and laser particle size analyzer. And the adsorption ability of the sodium alginate/cellulose composite microspheres to phosphate in water phase were evaluated. The results showed that all the composite microspheres were spherical with the average diameter of about 360 μm, and the microspheres exhibited three-dimensional network porous structure. FT-IR spectra showed that cellulose and sodium alginate were physically combined through hydrogen bonding and intermolecular interaction. The results of adsorption experiments showed that these composite microspheres had a strong adsorption capacity for phosphate in aqueous phase, and the adsorption capacity of phosphate on the composite microspheres increased with the increase of sodium alginate content. Among them, SACCM20 (mass fraction of sodium alginate 20%) had the strongest adsorption capacity for phosphate, and the adsorption efficiency could reach 85.58%.

Key words: cellulose microspheres, sodium alginate, adsorbent, phosphate radical

CLC Number: