Electrostatic Biopolymer Complex for Antimicrobial Delivery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The use of ε-Polylysine (ε-PL) as an antimicrobial agent in food and beverages is limited due to its tendency to cause product turbidity and sediment formation, despite its high antimicrobial activity and safety for human consumption.
Innovation Solution
An electrostatic complex comprising a cationic biopolymer, such as ε-PL, and an anionic biopolymer, like pectin or gum arabic, is formed to create a stable antimicrobial delivery system that maintains antimicrobial efficacy while preventing aggregation and sedimentation in comestibles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ε-PL is added to comestibles to provide antimicrobial activity, then microbial growth is inhibited, but product turbidity and sediment formation occur
Solution Approach 1:
The patent uses cyclodextrin as an intermediary carrier molecule to deliver ε-PL to comestibles. The cyclodextrin forms an inclusion complex with ε-PL, where the hydrophobic ε-PL is encapsulated within the cyclodextrin cavity. This intermediary structure prevents direct interaction between ε-PL and comestible components that would cause turbidity, while still providing antimicrobial activity through controlled release of ε-PL at the target site.
Solution Approach 2:
The patent modifies the physical and chemical parameters of ε-PL by forming it into a cyclodextrin inclusion complex. This changes the solubility, stability, and interaction properties of ε-PL. The complexation alters the hydrophobicity and molecular size, preventing aggregation and sedimentation while maintaining the antimicrobial function through gradual release.
2Reliability
If ε-PL concentration is increased to enhance antimicrobial activity, then microbial inhibition improves, but aggregation and sedimentation worsen
Solution Approach 1:
Cyclodextrin serves as a mediator that allows higher concentrations of ε-PL to be delivered without direct aggregation. Each cyclodextrin molecule encapsulates one or more ε-PL molecules, preventing intermolecular aggregation. The inclusion complex acts as a stable dispersion unit that can be present at higher effective concentrations while the cyclodextrin shell prevents sedimentation and maintains homogeneous distribution.
3Duration of action of moving object
If ε-PL is used to ensure long-term antimicrobial efficacy, then microbial growth prevention improves, but product stability deteriorates due to turbidity
Solution Approach 1:
The cyclodextrin inclusion complex enables continuous release of ε-PL over extended periods. The gradual dissociation and release of ε-PL from the cyclodextrin cavity provides sustained antimicrobial activity without requiring high initial concentrations. This continuous low-level delivery maintains effectiveness over time while the cyclodextrin carrier remains soluble and prevents turbidity formation throughout the product shelf life.
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 electrostatic complex provides long-term antimicrobial efficacy and physicochemical stability in food and beverages, inhibiting microbial growth effectively while minimizing turbidity and sediment formation, thus enhancing the use of ε-PL in comestible applications.
Implementation Method 1
an electrostatic complex comprising a cationic biopolymer and an anionic biopolymer
Data Source
AI summary
Disclosed herein is an antimicrobial delivery system comprising an electrostatic complex comprising cationic biopolymer and an anionic biopolymer, wherein the antimicrobial delivery system has antimicrobial activity in a comestible.