Biobased Coating Cross-Linking for Oleophobic Barrier
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Solution Overview
Problem
Biobased polymeric coatings for food packaging face challenges such as limited hydrophobic and oleophobic characteristics, high cost, and reduced durability compared to synthetic polymers, leading to environmental concerns and inefficiencies in waste management.
Innovation Solution
A method involving the deposition of an aqueous mixture containing modified cellulose polymer molecules and organic acid molecules with at least two carboxyl acid groups on a cellulose substrate, followed by water removal and cross-linking at elevated temperatures to create a cross-linked coating with enhanced oleophobic characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If biobased polymeric coatings are used for food packaging, then environmental sustainability is improved, but hydrophobic and oleophobic characteristics deteriorate
Solution Approach 1:
The patent combines biobased polysaccharide polymers with hydrophobic and oleophobic compounds to create a composite coating material. This composite structure allows the coating to maintain the biodegradability and environmental sustainability of polysaccharides while incorporating the water and oil repelling properties of the hydrophobic/oleophobic additives, thereby resolving the contradiction between environmental friendliness and functional performance.
2Object-generated harmful factors
If biobased polymeric coatings are used for food packaging, then biodegradability is improved, but durability and shelf-life deteriorate
Solution Approach 1:
By creating a composite coating system where biobased polysaccharides are combined with hydrophobic and oleophobic compounds, the patent achieves a balance between biodegradability and durability. The composite structure provides enhanced barrier properties that extend shelf-life while maintaining the underlying biodegradable nature of the polysaccharide matrix, allowing the coating to durably protect food during storage and transport before ultimately degrading.
3Object-affected harmful factors
If biobased polymeric coatings are used for food packaging, then cost-effectiveness deteriorates, but environmental performance improves
Solution Approach 1:
The patent utilizes polysaccharides that can be derived from abundant renewable resources such as cellulose, starch, and chitin, which are widely available and relatively inexpensive raw materials. By optimizing the formulation parameters and utilizing these abundant biobased resources, the patent aims to reduce the cost barrier associated with biobased coatings while maintaining their environmental performance advantages over synthetic alternatives.
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 cross-linked coating exhibits significant oleophobic characteristics, improving the barrier performance against oil and grease, while being biodegradable and compostable, thus addressing environmental concerns and offering a sustainable alternative to synthetic polymers.
Implementation Method 1
the organic acid molecules are cross-linkable with the modified cellulose polymer molecules and the cellulose at or above ambient temperatures
Implementation Method 2
removing water from the mixture deposited on the substrate to provide a coating on the substrate
Data Source
AI summary
A number of variations may include depositing, on a substrate comprising cellulose, an aqueous mixture comprising modified cellulose polymer molecules and organic acid molecules comprising at least two carboxyl acid groups; removing water from the mixture deposited on the substrate to provide a coating on the substrate; wherein the organic acid molecules have a melting point above ambient temperature, and wherein the organic acid molecules are cross-linkable with the modified cellulose polymer molecules and the cellulose at or above ambient temperatures.