Cellulose-Polyphenol Composite Enteric Coating
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Solution Overview
Problem
Current enteric film coatings used in pharmaceutical and food materials lack sufficient pH-dependent dissolution characteristics, leading to unsatisfactory release profiles and stability issues, with pharmaceutical materials being brittle and requiring excessive excipients, and food materials not providing desired enteric quality.
Innovation Solution
A composition comprising a cellulose-based compound, a polyphenol-based compound, and an antioxidant, specifically hydroxypropyl methylcellulose (HPMC) with green tea extract, which forms a composite with pH-dependent solubility, enabling enteric coating with improved stability and safety for use in both pharmaceutical and food applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If alginates or shellac are used for food materials, then they can be used in food applications, but they do not have sufficient pH dependent dissolution characteristics and dissolve slowly not only in the stomach but also in the intestine
Solution Approach 1:
The patent uses a composite material consisting of polyphenol-based compound and cellulose-based compound to achieve both food material compatibility and sufficient pH-dependent dissolution characteristics. The synergistic combination of these two natural polymers creates a coating that dissolves rapidly in intestinal environment while being safe for food applications.
2Reliability
If pharmaceutical materials with enteric coating are used, then they have pH dependent dissolution characteristics, but they have low transparency, are brittle at low water concentration, and require large amounts of additional excipients
Solution Approach 1:
The patent extracts and eliminates the need for additional excipients by using only the essential components - polyphenol-based compound and cellulose-based compound. The formulation achieves enteric coating functionality without requiring plasticizers, talc, or other additives, thereby reducing complexity and improving transparency.
Solution Approach 2:
The patent changes the chemical composition parameters by selecting specific polyphenol-based compounds and cellulose-based compounds with appropriate molecular weights and structural characteristics, enabling the coating to achieve desired properties without additional excipients.
3Reliability
If materials having phthalic acid are used, then they provide enteric coating, but they have problems such as formation of free phthalic acid
Solution Approach 1:
The patent converts the potential harm of using synthetic polymers into benefit by selecting natural polyphenol-based and cellulose-based compounds that provide enteric functionality without generating harmful degradation products like free phthalic acid. The natural origin of these polymers ensures safe degradation into benign substances.
4Adaptability or versatility
If natural products such as polyphenol-based compound and cellulose-based compound are mixed without antioxidants, then they can be used in food applications, but their long-term stability decreases
Solution Approach 1:
The patent applies preliminary protection by incorporating antioxidants into the coating formulation before application. This preventive measure protects the polyphenol-based and cellulose-based compounds from oxidation during storage, maintaining long-term stability while preserving food compatibility.
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 composite provides enhanced long-term storage stability, improved film quality, and enteric properties equivalent to pharmaceutical coatings, with the added benefit of antioxidant effects, ensuring safety and health benefits, while being environmentally friendly and cost-effective.
Implementation Method 1
the composite has pH-dependent solubility, and thus, may be used as a coating material or capsule material having enteric properties
Implementation Method 2
an antioxidant, specifically hydroxypropyl methylcellulose (HPMC) with green tea extract, which forms a composite with pH-dependent solubility, enabling enteric coating with improved stability and safety
Data Source
AI summary
Provide are a composition for forming a composite, the composition including a cellulose-based compound, a polyphenol-based compound, and a solvent, wherein an amount of the polyphenol-based compound is 1 to 40 parts by weight based on 100 parts by weight of the cellulose-based compound, a composite formed from the composition, and an orally ingestible composition including the composite. The composite has characteristics of being dissolved in a solvent in a various pH ranges depending on a mixing ratio of the cellulose-based compound and the polyphenol-based compound. Therefore, when the composite is used, a composite film may be easily prepared, and the composite film may be useful in medical or foods fields where film characteristics dependent on pH is required.