Superabsorbent Polymer Nanoparticle Silane Crosslinking
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Solution Overview
Problem
Current superabsorbent polymers with high swelling capacity often have a fragile structure and inadequate mechanical resistance, leading to insufficient fluid absorption and rapid fluid release, which is not suitable for various applications requiring both high absorption and retention capabilities.
Innovation Solution
A polymer matrix-based superabsorbent material comprising nanoparticles with a size range of 0.1-500 nanometers, water-soluble monomers suitable for radical polymerization, and vinyl alkoxysilane derivative agents as crosslinkers, which enhances swelling capacity, mechanical strength, and controlled fluid release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If crosslinking density is increased to improve mechanical properties, then gel strength is improved, but swelling capacity decreases
Solution Approach 1:
The patent changes the chemical parameters of the crosslinking agent by using vinyl alkoxysilane derivatives with different alkoxy groups (methoxy, ethoxy, propoxy) and varying carbon chain lengths. This allows optimization of the balance between gel strength and swelling capacity by selecting specific crosslinking agents that provide adequate mechanical properties while maintaining sufficient fluid absorption capability.
Solution Approach 2:
The patent creates a composite polymeric structure by combining acrylic acid or acrylamide monomers with vinyl alkoxysilane derivative crosslinking agents. This composite approach allows the material to exhibit both the hydrophilic swelling properties of the acrylic/acrylamide backbone and the mechanical strengthening effects of the silane crosslinking network.
2Quantity of substance
If swelling capacity is increased to improve fluid absorption, then fluid absorption capacity is improved, but mechanical resistance deteriorates
Solution Approach 1:
The patent optimizes the swelling capacity parameter by controlling the monomer-to-crosslinker ratio and selecting specific vinyl alkoxysilane derivatives with varying hydrophobicity. The alkoxy group type and chain length are adjusted to achieve the desired balance between fluid absorption and structural integrity.
Solution Approach 2:
The patent introduces local quality variations by using crosslinking agents with different alkoxy chain lengths and types, creating regions of varying crosslinking density and hydrophobicity within the polymer matrix. This allows different parts of the material to perform different functions - some regions optimized for absorption, others for structural support.
3Stability of the object's composition
If crosslinking density is increased to improve gel strength, then structural stability is improved, but fluid release rate increases
Solution Approach 1:
The patent controls the fluid release rate by adjusting the crosslinking density parameters through selection of specific vinyl alkoxysilane derivatives. The alkoxy group type and chain length are optimized to achieve moderate crosslinking that provides structural stability while maintaining controlled fluid release characteristics.
Solution Approach 2:
The vinyl alkoxysilane derivative acts as an intermediary crosslinking agent that mediates between the hydrophilic polymer chains and provides moderate structural support. The alkoxy groups serve as intermediaries that can be tuned to achieve the desired balance between structural stability and fluid retention.
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 material achieves improved swelling capacity, mechanical strength, and prolonged fluid retention, addressing the limitations of existing superabsorbent polymers by maintaining structure under pressure and releasing fluid slowly, suitable for agricultural, horticultural, and industrial applications.
Implementation Method 1
superabsorbent polymers are preferred due to their water retention properties. Superabsorbent polymers (SAP) are cross-linked, water-insoluble, hydrophilic synthetic materials that can absorb fluids hundreds of times their own weight.
Implementation Method 2
The crosslinking density of the polymeric structure with super absorbent characteristics directly affects the fluid absorption capacity and gel strength of said polymeric structure.
Implementation Method 3
Superabsorbent polymers (SAP) are cross-linked, water-insoluble, hydrophilic synthetic materials
Implementation Method 4
A polymer matrix based superabsorbent material comprising nanoparticles with a particle size in the range of 0.1-500 nanometers, one or more water-soluble monomers suitable for radical polymerization, and at least one vinyl alkoxysilane derivative agent as a crosslinker.
Data Source
AI summary
A polymer matrix based superabsorbent material is provided, which is made of a polymer including nanoparticles with a particle size in the range of 0.1-500 nanometers, one or more water-soluble monomers suitable for radical polymerization, and at least one vinyl alkoxysilane derivative agent as a crosslinker. A method of producing the polymer matrix based superabsorbent material is also provided, which includes steps of: obtaining a solution by adding a solvent to the one or more water-soluble monomers suitable for the radical polymerization, obtaining a reaction mixture by adding the at least one vinyl alkoxysilane derivative agent as the crosslinker to the solution, adding the nanoparticles with the particle size in the range of 0.1-500 nanometers to the reaction mixture, and obtaining the polymer by a polymerization process.