Self-Cross-Linking SAP Polymer for Absorption and Biodegradability
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Solution Overview
Problem
Existing biodegradable materials for Super Absorbent Polymers (SAPs) face challenges in achieving balanced physical properties, particularly absorption capacity and biodegradability, due to insufficient cross-linking sites and the use of non-biodegradable cross-linking agents.
Innovation Solution
A cross-linking process is developed without using traditional cross-linking agents or minimizing their use, utilizing self-cross-linking polysaccharides with specific molecular and structural adjustments, such as acidic polysaccharides, to enhance absorption capacity and biodegradability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cross-linking agents are used to improve absorption capacity, then absorption capacity is improved, but biodegradability deteriorates
Solution Approach 1:
The patent removes traditional non-biodegradable cross-linking agents from the SAP formulation and replaces them with biodegradable alternatives such as calcium ions and enzymatic cross-linking systems. This extraction of harmful substances resolves the contradiction by maintaining cross-linking functionality while eliminating the biodegradability problem.
Solution Approach 2:
The patent introduces biodegradable cross-linking agents as intermediary substances that temporarily perform the cross-linking function during SAP formation, then decompose over time. These intermediaries enable sufficient cross-linking for absorption capacity while being environmentally benign, thus resolving the contradiction between performance and biodegradability.
2Object-generated harmful factors
If biodegradable materials are used to improve biodegradability, then biodegradability is improved, but absorption capacity deteriorates
Solution Approach 1:
The patent optimizes parameters such as cross-linking density, polymer composition ratios, and molecular weight distribution to achieve a balance where biodegradable materials provide sufficient absorption capacity. By carefully controlling these parameters, the patent maintains absorption performance while using environmentally friendly materials.
Solution Approach 2:
The patent creates composite SAP structures combining biodegradable polymers with controlled cross-linking networks. This composite approach allows the material to exhibit both adequate absorption capacity through optimized network structure and good biodegradability through the use of natural polymer components.
3Reliability
If cross-linking is increased to improve absorption capacity, then absorption capacity is improved, but biodegradability deteriorates
Solution Approach 1:
The patent employs self-cross-linking mechanisms where the polymer chains themselves form cross-links through functional groups, eliminating the need for external cross-linking agents. This self-service approach achieves necessary cross-linking density for absorption capacity while maintaining biodegradability since no persistent cross-linking agents remain in the system.
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 process results in SAPs with improved absorption capacity and biodegradability, maintaining desired properties while minimizing environmental impact.
Implementation Method 1
The SAP is a material that can absorb moisture tens to thousands of times its own weight
Implementation Method 2
absorption capacity
Data Source
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AI summary
The present specification discloses a polymer. The polymer may be an absorbent polymer used for forming a so-called SAP. Through adjustment of materials applied to a cross-linking process for forming the SAP, and conditions of the cross-linking process, such a polymer may be formed even without using a so-called cross-linking agent or by minimizing its used amount, thereby exhibiting excellent absorption capacity. The polymer may be formed by cross-linking a biodegradable material, even without using the cross-linking agent or by minimizing the same, thereby exhibiting the maximum biodegradability of the material. The present specification also discloses a use of the polymer.