Capped PEG Soil Wetting Composition for Persistent Water Infiltration
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Solution Overview
Problem
Existing soil wetting agents are not durable, easily washed off by rain or irrigation, and do not effectively address the hydrophobicity of soils, leading to uneven water penetration and drought stress, which affects plant growth and water conservation.
Innovation Solution
The use of capped poly(ethylene glycol) (PEG) polymers with hydrophobic groups to anchor to hydrophobic soil particles, enhancing their hydrophilicity and improving water infiltration and retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional wetting agents are applied to hydrophobic soils, then water infiltration is initially improved, but the wetting agents are easily washed off by rain or irrigation, reducing durability
Solution Approach 1:
The patent uses capped poly(ethylene glycol) polymers that combine hydrophobic groups (for anchoring to soil particles) with hydrophilic PEG chains (for water attraction). This composite molecular structure creates a durable wetting agent that remains on soil particles after rain or irrigation, resolving the contradiction between initial water infiltration improvement and long-term durability.
Solution Approach 2:
The patent modifies the chemical parameters of the wetting agent by introducing hydrophobic caps on poly(ethylene glycol) polymers. This changes the surface properties and binding characteristics of the wetting agent, enabling it to anchor firmly to hydrophobic soil particles while maintaining water attraction capabilities, thus improving durability without sacrificing water infiltration performance.
2Productivity
If higher rates of wetting agents are applied to improve water penetration, then water infiltration is enhanced, but the increased amounts become injurious to plants
Solution Approach 1:
The patent changes the chemical parameters of the wetting agent to improve its efficiency. The capped poly(ethylene glycol) polymers with hydrophobic groups have enhanced binding affinity to soil particles, allowing effective water infiltration promotion at lower concentrations. This reduces the rate at which plants are exposed to the wetting agent, minimizing potential harm while maintaining water penetration benefits.
3Productivity
If conventional wetting agents are used, then water transport is initially improved, but the agents do not effectively address the hydrophobicity of soils, leading to uneven water penetration
Solution Approach 1:
The patent employs capped poly(ethylene glycol) polymers with a composite structure: hydrophobic caps that specifically interact with hydrophobic soil particles and hydrophilic PEG chains that attract and transport water. This composite structure directly addresses soil hydrophobicity, ensuring uniform distribution and effective water transport throughout the soil profile, eliminating uneven penetration.
4Productivity
If wetting agents are applied to improve water infiltration, then water transport characteristics are enhanced, but the agents are rapidly removed by repeated rains or watering
Solution Approach 1:
The capped poly(ethylene glycol) polymers combine hydrophobic anchoring groups with hydrophilic water-attracting chains, creating a composite structure that binds persistently to soil particles. The hydrophobic caps provide strong adhesion to hydrophobic soil surfaces, while the hydrophilic PEG chains maintain water attraction. This composite design ensures the wetting agent remains on soil particles through repeated rains or watering, extending its duration of action.
Solution Approach 2:
The patent changes the binding parameters of the wetting agent by introducing hydrophobic caps on poly(ethylene glycol) polymers. This modification increases the affinity between the wetting agent and soil particles, reducing removal by rain or irrigation. The altered chemical parameters enable persistent attachment while maintaining the ability to promote water infiltration over extended periods.
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 capped PEG polymers provide long-lasting hydrophilicity to hydrophobic soils, enhancing water penetration and retention, reducing drought stress, and improving plant growth and water conservation.
Implementation Method 1
capped poly(ethylene glycol) (PEG) polymers with hydrophobic groups to anchor to hydrophobic soil particles
Implementation Method 2
enhancing their hydrophilicity and improving water infiltration
Implementation Method 3
the rate of capillary water flow through the channel will be higher if the water is capable of wetting the channel surface
Implementation Method 4
agriculturalists will often apply various wetting agent surfactant compositions directly to the soil
Data Source
AI summary
A method for treating hydrophobic surfaces is provided. The mixture comprises:a wetting agent comprising;a compound of Formula I:wherein:R1 is a core group derived from a linear, cyclic or branched polyol with 1-55 carbons or a linear, cyclic or branched polyamine with 1-22 carbons wherein hydrogens on the alcohol group or hydrogens on the amine group are replaced with (CH2CH2O)n or R1 is defined by —R6(—C(═O)O—)m;R2 is a hydrophobic group preferably selected from the group consisting of R3, the elements necessary to form an ester, specifically —COR4, or the elements necessary to form a urethane, specifically —CONHR5;R3—R5 are each independently an alkyl of 6-22 carbons, wherein the alkyl is a linear, cyclic or branched and preferably linear;n, on average is 4-100;x is 2-20;R6 represents a bond or a linear, cyclic or branched alkyl with 6-22 carbons; andm is 2-20.