Aluminium Hydroxide Hydrogel for Low-Cost, Biodegradable Irrigation

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Solution Overview

Problem

Existing hydrogel materials for agriculture face issues such as high cost, toxicity, biodegradability concerns, and environmental impact, making them less attractive for sustainable irrigation solutions.

Innovation Solution

A biodegradable aluminium hydroxide hydrogel is developed through a simple chemical reaction, comprising aluminium polyhydrate and water, which is pH-neutral and non-toxic, and can be prepared at low cost without complex equipment, absorbing and retaining water effectively for extended periods.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If conventional superabsorbent polymers are used in hydrogel agriculture, then water storage capacity is improved, but toxicity and environmental harm increase

Engineering Contradiction:
Improvewater storage capacityVSAvoidtoxicity
Core Design Contradiction:
Quantity of substanceVSObject-generated harmful factors

Solution Approach 1:

The patent changes the chemical composition parameters by using aluminium hydroxide instead of conventional superabsorbent polymers. This substitution maintains water storage capability while eliminating toxicity, as aluminium hydroxide is a natural, non-toxic compound that decomposes harmlessly in the environment.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent employs a biodegradable aluminium hydroxide hydrogel that can be disposed of or decomposed naturally after use. The hydrogel maintains its water storage function during service and then breaks down into harmless substances, eliminating the need for complex disposal systems and reducing environmental accumulation.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

2Quantity of substance

If conventional hydrogel materials are used, then water retention is improved, but preparation cost increases

Engineering Contradiction:
Improvewater retentionVSAvoidpreparation cost
Core Design Contradiction:
Quantity of substanceVSEase of manufacture

Solution Approach 1:

The patent uses inexpensive aluminium hydroxide as the base material, which is cheaper than conventional superabsorbent polymers. The simple chemical reaction process required to prepare the hydrogel further reduces manufacturing costs, making the product economically viable for agricultural applications.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent simplifies the preparation process by changing the chemical parameters from complex polymer synthesis to a straightforward aluminium hydroxide polymerization reaction. This parameter change reduces the need for expensive equipment and complex manufacturing procedures while maintaining water retention effectiveness.

Inventive Principle:
Principle #35Parameter changes

3Quantity of substance

If conventional superabsorbents are used, then water supply capability is improved, but biodegradability deteriorates

Engineering Contradiction:
Improvewater supply capabilityVSAvoidbiodegradability
Core Design Contradiction:
Quantity of substanceVSStability of the object's composition

Solution Approach 1:

The patent employs a biodegradable aluminium hydroxide hydrogel that naturally decomposes in the environment after serving its water supply function. This biodegradability ensures that the hydrogel does not persist in the soil or water systems, eliminating long-term environmental accumulation and pollution issues.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent changes the chemical stability parameters of the hydrogel material to be appropriately unstable for biodegradation. The aluminium hydroxide polymerization structure is designed to maintain water supply capability during service but decompose readily under environmental conditions, achieving both functional stability and biological degradability.

Inventive Principle:
Principle #35Parameter changes

4Quantity of substance

If conventional hydrogel materials are used, then water storage is improved, but environmental impact worsens

Engineering Contradiction:
Improvewater storageVSAvoidenvironmental impact
Core Design Contradiction:
Quantity of substanceVSObject-generated harmful factors

Solution Approach 1:

The patent uses a biodegradable aluminium hydroxide hydrogel that leaves no harmful residues in the environment after use. The material decomposes into natural substances that can be safely disposed of or integrated into the soil ecosystem, eliminating the environmental pollution associated with conventional synthetic hydrogels.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent converts the potential harm of aluminium compounds into a benefit by using aluminium hydroxide, which is naturally occurring and non-toxic in agricultural contexts. The material provides effective water storage while its decomposition products are harmless or beneficial to the environment, turning a potentially harmful substance into an environmentally safe solution.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

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 aluminium hydroxide hydrogel enhances water retention in soil, supports plant growth in arid conditions, reduces water usage, and degrades harmlessly, offering a cost-effective and environmentally friendly irrigation solution.

Implementation Method 1

absorbing and retaining water effectively for extended periods

Methodology Applied
Scientific EffectAbsorption: Absorption (physical)

Implementation Method 2

enhances water retention in soil

Methodology Applied
Scientific EffectCapillary action: Capillary Action

Implementation Method 3

polymerizing aluminium hydroxide

Methodology Applied
Scientific EffectPolymerization: Photopolymerisation

Implementation Method 4

degrades harmlessly

Methodology Applied
Scientific EffectBiodegradation: Decomposition (biological)

Data Source

PatentUS20250212739A1Aluminium hydroxide hydrogel for agriculture
Publication Date: 2025.07.03 QATAR FOUND FOR EDUCATION SCI & COMMUNITY DEV
  • US20250212739A1 patent drawing
  • US20250212739A1 patent drawing
  • US20250212739A1 patent drawing

AI summary

An aluminium hydroxide hydrogel for agriculture is provided. The aluminium hydroxide hydrogel includes aluminium polyhydrate and water.