Sodium alginate/Na + -rectorite composite microspheres: Preparation, characterization, and dye adsorption
作者：Lianli Yang , Xiaoyan Ma , Naini Guo
關鍵字：Rectorite ,Sodium alginate, Composite microsphere, Structure and morphology Adsorption
論文來源：期刊
具體來源：Carbohydrate Polymers, 2012,90(2), pp853-858
發表時間：2012年
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.