Biodegradable urea-formaldehyde-based sand-fixing polymer material with slow nutrient release and water absorption and retention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current sand fixation methods face challenges in providing both wind-proofing and water retention while being environmentally friendly, as they often rely on non-degradable materials or have limitations in nutrient release for plant growth in desertified areas.
Innovation Solution
A biodegradable urea-formaldehyde-based sand-fixing polymer material with slow nutrient release and water absorption, integrated with a biodegradable polymer fabric, utilizing intermolecular hydrogen-bond interactions for enhanced bonding strength and industrial scalability, which is coated, rolled, and thermally cured to create a durable, water-retentive, and nutrient-rich barrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If mechanical sand fixation is used, then wind-proofing effect is improved, but non-degradable materials cause environmental pollution
Solution Approach 1:
The patent changes the material parameter from non-degradable to biodegradable by using polylactic acid (PLA) as the base polymer. This allows the sand fixation material to maintain its wind-proofing function during service and then decompose naturally after use, eliminating long-term environmental pollution while preserving the mechanical wind barrier effect.
Solution Approach 2:
The patent creates a composite material system combining polylactic acid (provides biodegradability and structural integrity), urea-formaldehyde resin (provides binding strength and slow nutrient release), and superabsorbent polymer (provides water retention). This composite structure achieves both effective wind-proofing and environmental compatibility through natural degradation.
2Quantity of substance
If chemical sand fixation is used, then water and fertility retention is improved, but spraying of sand-fixing agents is limited
Solution Approach 1:
The patent uses a flexible polymer fabric structure that can be directly placed on the sand surface, eliminating the need for spraying operations. The thin film structure conforms to the terrain and provides continuous coverage for water and nutrient retention without requiring complex spraying equipment or operations.
Solution Approach 2:
The sand fixation material contains embedded nutrients (urea-formaldehyde resin) and water retention capability (superabsorbent polymer) that automatically provide fertility and moisture to plants without requiring additional chemical applications or irrigation infrastructure. The material serves its own function of nutrient delivery and water management.
3Duration of action of stationary object
If biological sand fixation is used, then long-term desert control is improved, but plant survival in desert is difficult
Solution Approach 1:
The patent incorporates slow-release nutrients (urea-formaldehyde resin) and water retention capacity (superabsorbent polymer) into the sand fixation material before plant installation. This preliminary provision of water and nutrients creates favorable conditions for plant survival in the harsh desert environment, enabling plants to establish themselves before needing to rely solely on natural rainfall.
4Object-generated harmful factors
If biodegradable polymer materials are used, then secondary pollution is avoided, but bonding strength between composite and fabric is insufficient
Solution Approach 1:
The patent strengthens the bonding between the biodegradable polymer fabric and the nutrient-containing composite by using urea-formaldehyde resin as an adhesive component. The resin forms strong cross-linked bonds between the fabric and composite particles, providing mechanical strength while remaining part of the biodegradable system that decomposes naturally after use.
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 effectively prevents wind erosion, retains water, and gradually releases nutrients for plant growth, offering a sustainable solution for desertification control without secondary pollution, with improved mechanical properties and nutrient delivery.
Implementation Method 1
there is intermolecular hydrogen-bond interaction between the biodegradable urea-formaldehyde-based polymer composite and the biodegradable polymer fabric
Implementation Method 2
thermal curing of the biodegradable urea-formaldehyde-based polymer composite on the surface of the biodegradable polymer fabric
Implementation Method 3
biodegradable urea-formaldehyde-based polymer composite with slow nutrient release
Data Source
AI summary
formaldehyde-based polymer composite is coated on a surface of the biodegradable polymer fabric, and is embedded in meshes of the biodegradable polymer fabric. There is intermolecular hydrogen-bond interaction between the biodegradable urea-formaldehyde-based polymer composite and the biodegradable polymer fabric.