Salicylic Acid Poly(Anhydride Ester) Hydrogels for Drought-Tolerant Crops
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Solution Overview
Problem
Existing natural hydrogels used in agriculture are unstable and do not provide the desired properties for combating drought stress and promoting plant growth, while synthetic hydrogels lack positive effects upon degradation.
Innovation Solution
Development of biocompatible and biodegradable hydrogels derived from salicylic acid and itaconic acid, which can be used to form polymers that promote plant growth and increase drought tolerance, incorporating active agents like fertilizers or pesticides within the polymer structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If natural polymers are used to form hydrogels, then biocompatibility and water solubility are improved, but stability and desired hydrogel properties for combating drought stress deteriorate
Solution Approach 1:
The patent creates composite hydrogel systems by combining natural polymers (carboxymethyl cellulose, starch, chitosan) with synthetic salicylic acid-based poly(anhydride ester) polymers. This composite approach allows the hydrogel to inherit biocompatibility and water solubility from natural polymers while gaining stability and controlled degradation properties from the synthetic polymer component, which releases salicylic acid to combat drought stress.
2Reliability
If synthetic polymers are used to improve stability, then reliability is improved, but positive bioactive effects upon degradation are absent
Solution Approach 1:
The patent modifies the degradation parameters of synthetic polymers by incorporating salicylic acid moieties into the poly(anhydride ester) backbone. This chemical parameter change ensures that upon degradation, the polymer releases salicylic acid - a bioactive compound that promotes plant growth and drought tolerance - thereby maintaining both stability during use and positive bioactive effects upon degradation.
Solution Approach 2:
The synthetic polymer is designed to self-release beneficial salicylic acid upon degradation without requiring external intervention. The polymer structure itself contains the bioactive compound, allowing it to serve dual purposes: providing structural stability during the hydrogel's service life and then releasing salicylic acid to actively benefit the plant, eliminating the need for separate application steps.
3Productivity
If multiple applications of hydrogel are made to ensure effectiveness, then productivity is improved, but loss of time and resource consumption increase
Solution Approach 1:
The salicylic acid-based poly(anhydride ester) polymer is designed to provide continuous release of salicylic acid over an extended period. This continuous action eliminates the need for multiple discrete applications, as the polymer maintains effective concentrations of the bioactive compound throughout its degradation timeline, thereby reducing time loss while ensuring sustained effectiveness.
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 hydrogels enhance plant growth and drought tolerance by releasing salicylic acid upon degradation, improving seedling and crop health, and reducing the need for multiple applications, thus increasing growth rate and crop production.
Implementation Method 1
hydrolysis of the homopolymer yields the following products: salicylic acid
Data Source
AI summary
The present invention provides novel bioactive and biocompatible polymers derived from salicylic acid and itaconic acid. The present invention also provides hydrogels formed from these bioactive and biocompatible polymers, and methods of using such hydrogels to promote plant growth and/or to increase drought and stress tolerance.