Self-Cross-Linked Polysaccharide SAP for Absorption and Biodegradability
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Solution Overview
Problem
Existing hydrogel polymers used as Super Absorbent Polymers (SAPs) face challenges in balancing excellent absorption capacity and biodegradability, with many materials either lacking one or both properties at an appropriate level.
Innovation Solution
A polymer material comprising a self-cross-linked polysaccharide component, such as amylose and amylopectin, is developed, where the ratio and molecular weight of these components are controlled to achieve simultaneous high absorption capacity and biodegradability through a self-cross-linking process without external cross-linking agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If vinyl-based cross-linked polyacrylic acid is used as SAP material, then absorption capacity is improved, but biodegradability deteriorates
Solution Approach 1:
The invention changes the chemical composition parameters by using polysaccharides (starch, cellulose, chitosan) instead of vinyl-based synthetic polymers. This parameter change enables the material to maintain high absorption capacity while achieving excellent biodegradability, as natural polysaccharides are inherently biodegradable yet can form hydrogel networks with high water absorption capability through cross-linking
Solution Approach 2:
The invention creates a composite hydrogel structure by cross-linking natural polysaccharide chains to form a three-dimensional network. This composite structure combines the biodegradability of natural polymers with the high absorption capacity characteristic of SAP materials, achieving both properties simultaneously that neither component alone could provide
2Reliability
If biodegradable materials are used to manufacture SAP, then biodegradability is improved, but absorption capacity deteriorates
Solution Approach 1:
The invention optimizes the molecular weight and cross-linking density parameters of the polysaccharide-based hydrogel. By controlling these parameters, the material achieves a balance where the polymer network is sufficiently dense to provide high absorption capacity (comparable to commercial SAPs) while maintaining the biodegradability inherent in natural polysaccharide structures
Solution Approach 2:
The invention introduces functional groups (carboxyl, hydroxyl, amino groups) at specific locations on the polysaccharide chains to enhance water absorption capability. This local modification of quality allows the material to achieve high absorption capacity in specific regions of the polymer network while the overall biodegradable nature of the polysaccharide backbone is preserved
3Quantity of substance
If external cross-linking agents are used, then absorption capacity is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The invention employs self-cross-linking mechanisms where the polysaccharide molecules cross-link with themselves through inherent functional groups or mild treatment conditions. This self-service approach eliminates the need for complex external cross-linking agents and multi-step manufacturing processes, reducing both manufacturing complexity and cost while maintaining high absorption capacity
Solution Approach 2:
The invention extracts and utilizes the inherent cross-linking potential within the polysaccharide structure itself, removing the requirement for external cross-linking agents. By taking out the cross-linking function from the system and embedding it within the polysaccharide molecules themselves, the manufacturing process is simplified while the desired absorption properties are achieved
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 polymer material exhibits excellent absorptivity and biodegradability, meeting or exceeding standards for moisture content, centrifuge retention capacity, and absorption capacity under pressure, while ensuring complete biodegradation.
Implementation Method 1
a polymer material comprising a self-cross-linked polysaccharide component
Implementation Method 2
The polymer material exhibits excellent absorptivity and biodegradability
Implementation Method 3
ensuring complete biodegradation
Implementation Method 4
exhibits excellent absorptivity and biodegradability
Data Source
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AI summary
The present application relates to a polymer material and a use thereof. The present application can provide a polymer material having excellent biodegradability and absorptivity by using a polysaccharide into which a specific functional group is introduced. The present application can also provide a use of the polymer material.