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CaCl2-in-Mesoporous Silica Grown on Superabsorbent Polymer to Enhance Water Uptake.
- Source :
- KONA: Powder & Particle Journal; 2015, Issue 32, p207-216, 10p
- Publication Year :
- 2015
-
Abstract
- Super absorbent polymer (SAP) sorbs copious amount of liquid water but its sorption power for water vapor is quite low. On the other hand, mesoporous silica loaded with CaCl<subscript>2</subscript> (MPS-CC) has high sorption capacity for water vapor. However, this is determined by the salt loading, which is limited due to its corrosiveness. Even by simple powder blending of 75 mass% of SAP and the balance of MPS-CC (SAP75/MPS-CC<subscript>2</subscript>5), the 3-hour maximum specific water uptake (g H2O/g sorbent) reached the maximum, 3 times the equilibrium uptake of MPS-CC. The sorption property was further enhanced by developing a new sorbent in which mesoporous silica was grown on the surface of swelling SAP and then impregnated by CC in ethanol. In the new sorbent (SAP-iMPS-CC), MPS grew organized, straight and lengthwise by the help of SAP. Owing to such intimate contact between MPS and SAP, the 3-hour specific water uptake of the new sorbents grown for more than 24 h (SAP-iMPS-CC24) was kept constant at the value of 2 times that of SAP75/MPS25. The SAP mass% of SAP-iMPS-144 could reach 25 without the sacrifice of sorption capacity. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02884534
- Issue :
- 32
- Database :
- Complementary Index
- Journal :
- KONA: Powder & Particle Journal
- Publication Type :
- Academic Journal
- Accession number :
- 113415498
- Full Text :
- https://doi.org/10.14356/kona.2015011