Superabsorbent Polymer Composition with Surface-Crosslinked Deodorizing Layer
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Solution Overview
Problem
Superabsorbent polymers used in sanitary products face challenges in maintaining high absorbency and water retention while minimizing odor release, as traditional deodorizing materials compromise these properties.
Innovation Solution
A superabsorbent polymer composition is developed with a surface-crosslinked layer, incorporating tannic acid, an iodine compound, and a chelating agent to enhance deodorizing ability without deteriorating physical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional deodorizing materials are mixed with superabsorbent polymer, then deodorizing ability is improved, but absorbency and water retention capacity deteriorate
Solution Approach 1:
The deodorizing function is segmented from the bulk polymer and concentrated on the surface through surface crosslinking. The surface-crosslinked layer contains deodorizing agents that specifically target odor molecules, while the internal polymer structure maintains its absorbency and water retention properties unchanged.
Solution Approach 2:
Different regions of the superabsorbent polymer are given different functions: the surface layer is modified with deodorizing properties through crosslinking, while the internal bulk material retains its original high absorbency characteristics. This local differentiation allows simultaneous optimization of both deodorizing ability and absorbency.
2Object-affected harmful factors
If excessive amount of deodorizing materials is mixed with superabsorbent polymer, then deodorizing ability is improved, but absorbency is lowered
Solution Approach 1:
Instead of mixing deodorizing materials throughout the entire polymer bulk, the deodorizing action is concentrated partially on the surface layer only. This partial application of deodorizing agents achieves effective odor suppression while minimizing the amount of deodorizing material needed and avoiding interference with the polymer's absorbency.
3Reliability
If surface crosslinking is performed to improve water retention capacity, then water retention is improved, but deodorizing ability is not achieved
Solution Approach 1:
The surface crosslinking process is combined with deodorizing agent incorporation in a single integrated treatment. The crosslinking agents used in surface modification also serve as carriers or activators for deodorizing substances, merging the water retention enhancement function with the odor suppression function in the surface layer.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition effectively removes unpleasant odors from absorbed liquids and inhibits bacterial growth, maintaining high absorbency and water retention capabilities.
Implementation Method 1
A superabsorbent polymer (SAP) is a synthetic polymeric material capable of absorbing moisture from 500 to 1000 times its own weight
Implementation Method 2
a superabsorbent polymer composition capable of removing both an unpleasant odor which is initially caused by urine discharged from the human body and an unpleasant odor which is caused by bacteria on the skin, etc.
Implementation Method 3
the superabsorbent polymer should not release absorbed liquid even under an external pressure
Implementation Method 4
a superabsorbent polymer composition with deodorizing ability
Data Source
AI summary
The present invention relates to a superabsorbent polymer composition and a preparation method thereof. Particularly, the present invention provides a superabsorbent polymer composition with deodorizing ability while minimizing deterioration in physical properties of the super absorbent polymer by controlling and mixing a deodorizing material combination, and a preparation method thereof.