Nitrogen Plasticizers for Peptide Biopolymer Processability
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Solution Overview
Problem
Peptide-based biopolymers like keratin and silk are difficult to process due to their rigidity and stability issues, and existing plasticizers such as urea and hydrocarbon-based compounds have limitations, including toxicity, environmental concerns, and inefficiencies in amino acid absorption in ruminants.
Innovation Solution
Using nitrogen-containing compounds with a melting point greater than urea, such as biuret, melamine, and certain amino acids, as plasticizers to mix with peptide-based biopolymers, heat them between 130°C and 300°C, and form pellets for use as fertilizers or animal feed, which also serve as substitutes for petroleum-based plastics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If urea is used as a plasticizer for peptide-based biopolymers, then the biopolymers become easier to process, but toxic ammonia is released and metal molds are corroded
Solution Approach 1:
The patent replaces urea with alternative plasticizers including hydrocarbon-based polymers (such as polyethylene glycol, polypropylene glycol) and other compounds that do not decompose into toxic substances. These substitutes maintain the plasticizing function while avoiding the harmful ammonia release and corrosion issues associated with urea decomposition
Solution Approach 2:
The patent changes the chemical composition parameter of the plasticizer from urea to other compounds with different decomposition characteristics. By selecting plasticizers that are stable under processing conditions or decompose into non-toxic products, the harmful effects are eliminated while maintaining processability
2Ease of operation
If high temperature, acids, alkalines, or redox agents are used to break disulfide bonds in peptide-based biopolymers, then the biopolymers become more workable, but the peptide bonds are also broken causing decomposition
Solution Approach 1:
The patent introduces plasticizers that selectively interact with disulfide bonds through specific mechanisms (such as hydrogen bonding or complex formation) without affecting peptide bonds. This localized action allows disulfide bond disruption while preserving the integrity of the peptide backbone through controlled chemical interaction
Solution Approach 2:
The patent uses plasticizers as intermediary substances that mediate between the biopolymer structure and the desired workability. These intermediaries facilitate disulfide bond breaking through gentle mechanisms while protecting peptide bonds from degradation, acting as a buffer that enables controlled structural modification
3Ease of manufacture
If hydrocarbon-based polymers are used as plasticizers, then the biopolymers become easier to process, but environmental concerns and petroleum dependency arise
Solution Approach 1:
The patent changes the origin parameter of the plasticizer from petroleum-based hydrocarbons to biodegradable alternatives. By selecting plasticizers derived from renewable resources or with biodegradable properties, the environmental impact is reduced while maintaining processability through appropriate molecular structure selection
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
This method allows for the production of biodegradable, easily processable, and nutritionally enhanced biopolymer pellets that improve amino acid absorption and reduce environmental impact, while avoiding the drawbacks of traditional plasticizers.
Implementation Method 1
the addition of a plasticizer to a material results in a lowering melting point of the plasticizer/material combination compared to the melting point for both the plasticizer and the material, individually
Implementation Method 2
to use these biopolymers, one must often break the disulfide bonds using high temperature, acids, alkalines, redox agents, enzymes, urea, or a combination thereof
Implementation Method 3
While urea is extremely useful in degrading disulfide bonds, under normal processing conditions, urea breaks down into ammonia, a toxic substance under certain conditions
Implementation Method 4
the secondary structure of peptide-based biopolymers can include large amounts of α-helix and/or β-sheet formations which also strengthen the peptide-based biopolymer because of hydrogen bonding between the amide and carbonyl groups
Data Source
AI summary
A novel method of reducing the melting point of a peptide-based biopolymer using a nitrogen-containing compound as a plasticizer is provided. The peptide-based biopolymer can be keratin or silk. The nitrogen-containing compound can be one or more amino acids or other nitrogen-containing compounds (except urea), all of which have a melting temperature above approximately 133° C., the decomposition temperature of urea. Pellets made using this novel process can be used as animal feed and soil amendments (fertilizer) to increase the adsorption of amino acids in the animal or in the soil, respectively.