Dextrin Fatty Acid Surfactants for Biodegradable Soil Wetting
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Solution Overview
Problem
Conventional surfactants face issues such as poor biodegradability, high surface tension, and fixed hydrophilic-lipophilic balance (HLB), which hinder their use in agricultural applications and are subject to regulatory constraints.
Innovation Solution
Reaction products of saccharide polymers like dextrin and dextran with fatty acids or fatty esters, under alkaline conditions, form surfactants with adjustable HLB and low surface tension, suitable for agricultural use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional synthetic surfactants are used, then surfactant functionality is achieved, but biodegradability deteriorates and environmental compliance is compromised
Solution Approach 1:
The patent changes the chemical composition parameters by using saccharide polymers (dextrin, dextran) instead of synthetic surfactants, fundamentally altering the molecular structure to achieve biodegradability while maintaining surfactant functionality. This parameter change resolves the contradiction between functionality and environmental compatibility.
Solution Approach 2:
The invention creates composite molecular structures by reacting saccharide polymers with fatty acids or fatty esters, forming amphiphilic compounds that combine the biodegradability of natural polymers with the surfactant properties needed for agricultural applications, thus resolving the contradiction between natural biodegradability and functional performance.
2Reliability
If conventional surfactants are used, then surfactant action is achieved, but surface tension remains high at critical micelle concentration
Solution Approach 1:
The patent modifies the molecular parameters of the surfactant by using saccharide polymer-based structures with specific fatty acid chain lengths, which changes the critical micelle concentration and surface tension characteristics to achieve lower surface tension values while maintaining effective surfactant performance.
3Reliability
If conventional surfactants are used, then surfactant functionality is achieved, but hydrophilic-lipophilic balance is fixed and cannot be adjusted
Solution Approach 1:
The patent introduces dynamic adjustability to the HLB parameter by selecting different saccharide polymer molecular weights and fatty acid chain lengths, allowing the HLB value to be tuned for different agricultural applications. This dynamic capability resolves the contradiction between fixed functionality and adaptable versatility.
Solution Approach 2:
The invention changes the compositional parameters by varying the ratio of saccharide polymer to fatty acid, enabling continuous adjustment of the hydrophilic-lipophilic balance to match different agricultural needs while maintaining core surfactant functionality.
4Ease of operation
If conventional surfactants are used in agriculture, then wetting and dispersion functions are achieved, but biodegradability and regulatory compliance deteriorate
Solution Approach 1:
The patent changes the chemical composition to saccharide polymer-based surfactants that maintain effective soil wetting and dispersion parameters while achieving biodegradability, thus resolving the contradiction between functional performance and environmental reliability in agricultural applications.
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 reaction products are highly biodegradable, offer low surface tension, and can replace conventional surfactants, promoting foaming and emulsification, while being environmentally friendly and compliant with regulations.
Implementation Method 1
Amphiphilic compounds having both hydrophobic and hydrophilic regions within their molecular structure are commonly referred to as 'surfactants' or 'surfactant compounds.' By virtue of their molecular structure, surfactants tend to lower the surface tension at an interface between two components.
Implementation Method 2
surfactants may promote solubility of an otherwise sparingly soluble solid, improve dispersion of a solid, increase foaming, facilitate emulsification or de-emulsification
Implementation Method 3
the surfactant may increase wetting of the soil, thereby allowing water to permeate the soil more easily and promote plant growth therein
Data Source
AI summary
An agricultural product may comprise an aqueous carrier phase, a neutral surfactant or a reaction product thereof, and a reaction product of a saccharide polymer and a fatty acid. The reaction product of the saccharide polymer may be obtained in the presence of water and a hydroxide base (optionally in the presence of the neutral surfactant). The saccharide polymer comprises a dextran, a dextrin compound, or any combination thereof. The reaction product of the saccharide polymer and the fatty acid may be present at a concentration effective to lower surface tension of the neutral surfactant and may be highly biodegradable as evaluated by OECD 301B. Compositions comprising the reaction product of the saccharide polymer and the fatty acid may be applied to an untreated soil to form a treated soil that absorbs water faster or to a greater extent than does the untreated soil.