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Computational Approach to the Surface-Crosslinking Process of Superabsorbent Polymer via Central Composite Design
Hae-Chan Kim1,2, Yong-Rok Kwon1,2, Jung-Soo Kim1
1Material & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), Ansan 15588, Korea.
Polymers
|September 23, 2022
Summary
Optimizing surface-crosslinking conditions for superabsorbent polymers (SAPs) significantly enhances gel strength and absorption. This study identified ideal parameters for SAPs used in sanitary applications, improving their performance.
Area of Science:
- Polymer Science
- Materials Science
Background:
- Superabsorbent polymers (SAPs) are crucial for sanitary products.
- Enhancing SAP gel strength and absorption is vital for performance.
Purpose of the Study:
- To optimize surface-crosslinking conditions for SAPs.
- To improve SAP gel strength and absorption properties for sanitary applications.
Main Methods:
- Core-SAP preparation via aqueous solution copolymerization.
- Surface-crosslinking of SAPs under varied conditions.
- Characterization using FT-IR spectroscopy.
- Optimization using Central Composite Design (CCD) of Response Surface Methodology (RSM).
Main Results:
- Optimal conditions: 2.22 mol% crosslinker, 160°C, 8.7 min.
- Achieved absorbency under load of 50 g/g.
- Demonstrated permeability of 50 s.
- Evaluated free absorbency and centrifuge retention capacity.
Conclusions:
- Surface-crosslinking is effective in improving SAP properties.
- Optimized SAPs exhibit superior performance for sanitary applications.
- RSM is a valuable tool for optimizing polymer processing conditions.
Keywords:
absorption propertycentral composite designresponse surface methodologysuperabsorbent polymer compositessurface-crosslinking
