Protein-Polymer Copolymers for Humidity-Resistant Plastics
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Solution Overview
Problem
Protein-based materials are challenging to develop into strong and tough elastomers or engineering plastics due to their brittleness and sensitivity to humidity, despite their potential for sustainability and mechanical reinforcement, as they require modification and plasticization which often compromises stiffness and strength.
Innovation Solution
A copolymer comprising modified proteins with functional groups such as acrylates, siloxanes, or maleimides, combined with surfactants and additional monomers, which are polymerized to create hydrophobic resins with improved mechanical properties and reduced humidity sensitivity, allowing for the production of strong and extensible materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If proteins are used as the basis for materials, then sustainability and mechanical reinforcement are improved, but brittleness and humidity sensitivity worsen
Solution Approach 1:
The patent creates composite materials by combining proteins with hydrophobic polymers (polyacrylates, polysiloxanes, polyglycidyl ether, polyvinyl, polyepoxy, or polymaleimide) to form copolymers. This composite structure leverages the mechanical reinforcement properties of proteins while the hydrophobic polymer components provide resistance to humidity and improve processability, thereby resolving the contradiction between mechanical strength and humidity sensitivity.
2Ease of manufacture
If proteins are modified and plasticized to improve processability, then ease of manufacture is improved, but stiffness and strength deteriorate
Solution Approach 1:
The patent modifies the chemical parameters of proteins by introducing hydrophobic functional groups (acrylate, siloxane, glycidyl ether, vinyl, epoxy, or maleimide groups) through conjugation with synthetic polymers. This parameter change transforms the protein structure to achieve both improved processability and maintained stiffness/strength, as the modified protein chains can be processed more easily while the crosslinked network structure preserves mechanical properties.
Solution Approach 2:
By creating composite protein-polymer copolymers, the patent achieves a synergistic effect where the protein provides mechanical reinforcement and the hydrophobic polymer matrix provides processability and humidity resistance. This composite approach allows simultaneous improvement of processability and maintenance of strength, resolving the trade-off between ease of manufacture and mechanical properties.
3Ease of operation
If hydrophilic plasticizers are used to improve extensibility, then flexibility is improved, but resistance to humidity deteriorates
Solution Approach 1:
The patent changes the hydrophilicity parameter of the plasticizer system by using hydrophobic polymers (polyacrylates, polysiloxanes, polyglycidyl ether, polyvinyl, polyepoxy, or polymaleimide) instead of conventional hydrophilic plasticizers. This parameter change enables the material to achieve extensibility while simultaneously developing resistance to humidity, as the hydrophobic polymer chains do not interact favorably with water molecules.
Solution Approach 2:
The patent converts the typically harmful effect of hydrophobicity (which can reduce processability) into a beneficial property by using hydrophobic polymers as plasticizers. The hydrophobic character provides both extensibility and humidity resistance simultaneously, turning what would normally be a disadvantage into a dual benefit that resolves the contradiction between flexibility and humidity resistance.
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 protein-based copolymers exhibit enhanced strength, toughness, and processability, enabling the fabrication of materials with a wide range of properties and reduced humidity dependence, making them suitable for industrial applications as elastomers or engineering plastics.
Implementation Method 1
A copolymer comprising modified proteins with functional groups such as acrylates, siloxanes, or maleimides, combined with surfactants and additional monomers, which are polymerized to create hydrophobic resins
Data Source
AI summary
Disclosed are copolymers comprising a modified protein first monomer, a surfactant, and a second monomer. Methods of making copolymers comprising a modified protein first monomer, a surfactant, and a second monomer are described. Also disclosed are articles comprising the copolymers. Disclosed are blends comprising a protein, a surfactant, and a second monomer. Methods of making blends comprising a protein, a surfactant, and a second monomer are described. Also disclosed are articles comprising the blends.