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  • Sodium alginate/Na + -rectorite composite microspheres: Preparation, characterization, and dye adsorption
  • 来源:马晓燕教授个人网站 2014-03-24
  • Sodium  alginate/Na+-rectorite  (SA/Na+REC)  intercalated  nano-composite  microspheres  were  prepared  in an  inverse  suspension  system.  The  effect  of  the  preparation  conditions  of  SA/Na+REC  composite  microspheres  on  adsorption  capacity  for  Basic  Blue  9  was  investigated.  The  structure  and  morphology  were analyzed  by  Fourier  transform  infrared  spectroscopy  (FTIR),  X-ray  diffraction  (XRD)  and  scanning  electron microscope (SEM).  The  results  showed  that  the  optimal  condition  was  that  the  amount  of  Na+-rectorite was 2wt%,  the  amount  of  cross-linker  was  0.384%  and  the  amount  of  the  initiator  was  8%. SEM  showed that  it  is  porous  products  with  spherical  particulate  surface.  XRD  showed  that  intercalation  is  formed between  Na+-rectorite  and  sodium  alginate. The  adsorption  capacity  of  SA/Na+ REC  was  investigated  in  comparison  with Na+-rectorite  and  sodium alginate  using  different  cationic  dyes. The SA/Na+REC  composite  microspheres  showed  the  highest adsorption capacity.  The  reason  lies  in  the  existence  of  intercalated  sodium  alginate.  It  could  enlarge the  pore  structure  of  microspheres,  facilitating  the  penetration  of  macromolecular  dyes.


  • [来源:中国聚合物网]
  • 了解更多请进入: 马晓燕教授个人网站
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