Biodegradable Crystalline Microcapsules for Stable Polymer-Free Encapsulation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing microencapsulation technologies using crosslinked polymers result in non-degradable microplastics that accumulate in the environment, posing ecological concerns, while biodegradable alternatives often fail to encapsulate core materials effectively and maintain mechanical stability.

Innovation Solution

The use of biodegradable crystalline materials like waxes and paraffins as the encapsulating wall, which crystallize at lower temperatures to form microcapsules without a polymer framework, ensuring miscibility with the core material and maintaining stability through phase separation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If crosslinked polymers are used for microencapsulation, then mechanical stability and encapsulation effectiveness are improved, but biodegradability deteriorates resulting in environmental accumulation

Engineering Contradiction:

Improvemechanical stabilityVSAvoidenvironmental pollution

Core Design Contradiction:

StrengthVSObject-generated harmful factors

Solution Approach 1:

The invention changes the fundamental parameter of wall material from crosslinked polymer to crystalline material. This parameter change enables the material to achieve both mechanical stability through crystal lattice structure and biodegradability through natural decomposition pathways, resolving the contradiction between strength and environmental harm

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses composite crystalline materials comprising multiple components (fatty acids, waxes, paraffins) that work synergistically. The composite structure provides enhanced mechanical properties while maintaining biodegradability, as each component contributes to overall stability without compromising environmental compatibility

Inventive Principle:

Principle #40Composite materials

2Object-generated harmful factors

If biodegradable materials are used for microencapsulation, then environmental compatibility is improved, but mechanical stability and encapsulation effectiveness deteriorate

Engineering Contradiction:

Improveenvironmental pollutionVSAvoidmechanical stability

Core Design Contradiction:

Object-generated harmful factorsVSStrength

Solution Approach 1:

The invention changes the physical state parameter of biodegradable materials from amorphous to crystalline. This crystalline structure provides rigid lattice arrangements that enhance mechanical strength and stability, while the biodegradable chemical composition ensures environmental compatibility, thus resolving the contradiction between strength and environmental harm

Inventive Principle:

Principle #35Parameter changes

3Object-generated harmful factors

If amorphous biodegradable materials are used, then biodegradability is improved, but encapsulation efficiency and structural integrity deteriorate

Engineering Contradiction:

ImprovebiodegradabilityVSAvoidencapsulation efficiency

Core Design Contradiction:

Object-generated harmful factorsVSReliability

Solution Approach 1:

The invention utilizes the phase transition property of crystalline materials. The crystalline phase provides structural integrity and encapsulation efficiency, while the material remains biodegradable. The controlled phase behavior enables both reliable encapsulation and environmental degradation

Inventive Principle:

Principle #36Phase transitions

Solution Approach 2:

The invention changes the molecular arrangement parameter from disordered (amorphous) to ordered (crystalline). This structural parameter change enhances encapsulation efficiency through regular lattice structures while maintaining biodegradability through natural chemical composition

Inventive Principle:

Principle #35Parameter changes

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 resulting microcapsules exhibit improved biodegradability, mechanical stability, and encapsulation efficiency, minimizing environmental pollution and retaining properties comparable to polymer-containing microcapsules.

Implementation Method 1

maintaining stability through phase separation

Methodology Applied

Scientific EffectPhase separation:

Implementation Method 2

which crystallize at lower temperatures to form microcapsules

Methodology Applied

Scientific EffectCrystallization: Crystallisation

Data Source

PatentUS20250222420A1Biodegradable microcapsules based on crystalline materials and synthesis process

Publication Date: 2025.07.10 MIKROCAPS D O O

AI summary

The present invention relates to a water dispersion of biodegradable microcapsules, with a membrane formed of a biodegradable crystalline material only, i.e. free of polymer framework, and synthesis thereof. Biodegradable microcapsules consist of a core material comprising at least one water-immiscible and water-insoluble active component, and a membrane that encloses this core material, the membrane consisting of a highly crystalline material only, wherein the crystalline material is a lipophilic biodegradable organic compound which is solid at room temperature and has a melting point equal to or above 40° C. Biodegradable microcapsules are in the form of aqueous dispersions and are used primarily for encapsulation of pesticides for use in pest control applications.