Superabsorbent Polymer Clay Dispersion
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Solution Overview
Problem
Existing superabsorbent polymers face challenges in achieving uniform distribution and improved properties due to non-uniform dispersion of nanoclay particles, leading to suboptimal absorbency under pressure (AUP) and centrifuge retention capacity (CRC).
Innovation Solution
A method involving the use of plate-type and rod-shaped clay modified with an amine-based organic compound to introduce amine groups on the surface, enhancing dispersion and multi-crosslinking within the polymer, improving AUP and CRC.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If nanoclay is added before polymerization to improve elasticity and flexibility, then the polymer properties are improved, but the nanoclay particles are non-uniformly distributed due to dispersion stability problems
Solution Approach 1:
The patent uses a dispersant as an intermediary substance to facilitate uniform distribution of nanoclay particles in the acrylic acid-containing polymerization solution. The dispersant mediates between the nanoclay particles and the polymer matrix, preventing agglomeration and ensuring homogeneous dispersion throughout the polymer structure.
Solution Approach 2:
The patent modifies surface parameters of nanoclay particles through surface treatment methods to improve their compatibility with the acidic polymerization solution. By changing surface chemistry parameters, the nanoclay particles achieve better dispersion stability and uniform distribution in the polymer matrix during polymerization.
2Stability of the object's composition
If surface modification of nanoclay is performed to improve dispersibility, then dispersion stability is improved, but surface treatment uniformity becomes problematic
Solution Approach 1:
The dispersant acts as an intermediary that uniformly coats nanoclay particles during the mixing process, ensuring consistent surface treatment across all particles. This intermediary approach avoids the need for complex surface modification procedures while achieving uniform dispersion.
Solution Approach 2:
The patent performs preliminary mixing of nanoclay with dispersant before polymerization, ensuring uniform surface coverage is achieved in advance. This preliminary action prevents agglomeration during subsequent polymerization steps and ensures consistent dispersion throughout the final polymer product.
3Quantity of substance
If a large quantity of nanoclay is introduced to compensate for poor dispersion, then filler content is increased, but agglomeration problems worsen in the final product
Solution Approach 1:
The dispersant serves as a critical intermediary that enables introduction of adequate nanoclay filler content while preventing agglomeration. It maintains steric or electrostatic repulsion between particles, allowing high filler loading without sacrificing dispersion quality or causing agglomeration in the final product.
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 method results in a superabsorbent polymer with enhanced absorbency under pressure and centrifuge retention capacity, maintaining shape and absorption properties even under external pressure.
Implementation Method 1
plate type and rod-shaped clay which has been modified with an amine-based organic compound and has an amine group introduced on the surface
Implementation Method 2
polymerizing the monomer composition to form a hydrogel polymer including a multi-crosslinked polymer
Implementation Method 3
A super absorbent polymer (SAP) is a synthetic polymer material that can absorb moisture at 500 to 1000 times its own weight
Implementation Method 4
polymerizing the monomer composition to form a hydrogel polymer including a multi-crosslinked polymer
Data Source
AI summary
The present invention relates to a method for preparing superabsorbent polymer that introduces a plate type and rod-shaped clay additive in the superabsorbent polymer, and thus exhibits basic properties of a superabsorbent polymer equivalent to or much better than the existing superabsorbent polymer through multi-crosslinking, and particularly, can improve absorbency under pressure (AUP), and a superabsorbent polymer obtained thereby.